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authorJovan Zelincevic <jovan.zelincevic@imgtec.com>2015-06-30 11:53:03 +0200
committerMichael Niedermayer <michaelni@gmx.at>2015-07-09 14:35:44 +0200
commitf497a9e84edb24c99a9043e1b21c7e48f3908e87 (patch)
tree18137d1b18f73d1f435667f257d4d4f08ea3b1f1 /libavcodec/aacdec.c
parent15893adbdb6a7000f59207bcb88def6e7b4812b9 (diff)
downloadffmpeg-f497a9e84edb24c99a9043e1b21c7e48f3908e87.tar.gz
libavcodec: Implementation of AAC_fixed_decoder (LC-module) [1/4]
Move existing code to the new template files Signed-off-by: Nedeljko Babic <nedeljko.babic@imgtec.com> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/aacdec.c')
-rw-r--r--libavcodec/aacdec.c3020
1 files changed, 1 insertions, 3019 deletions
diff --git a/libavcodec/aacdec.c b/libavcodec/aacdec.c
index 622cc5c087..1d1abc9fd5 100644
--- a/libavcodec/aacdec.c
+++ b/libavcodec/aacdec.c
@@ -32,55 +32,6 @@
* @author Maxim Gavrilov ( maxim.gavrilov gmail com )
*/
-/*
- * supported tools
- *
- * Support? Name
- * N (code in SoC repo) gain control
- * Y block switching
- * Y window shapes - standard
- * N window shapes - Low Delay
- * Y filterbank - standard
- * N (code in SoC repo) filterbank - Scalable Sample Rate
- * Y Temporal Noise Shaping
- * Y Long Term Prediction
- * Y intensity stereo
- * Y channel coupling
- * Y frequency domain prediction
- * Y Perceptual Noise Substitution
- * Y Mid/Side stereo
- * N Scalable Inverse AAC Quantization
- * N Frequency Selective Switch
- * N upsampling filter
- * Y quantization & coding - AAC
- * N quantization & coding - TwinVQ
- * N quantization & coding - BSAC
- * N AAC Error Resilience tools
- * N Error Resilience payload syntax
- * N Error Protection tool
- * N CELP
- * N Silence Compression
- * N HVXC
- * N HVXC 4kbits/s VR
- * N Structured Audio tools
- * N Structured Audio Sample Bank Format
- * N MIDI
- * N Harmonic and Individual Lines plus Noise
- * N Text-To-Speech Interface
- * Y Spectral Band Replication
- * Y (not in this code) Layer-1
- * Y (not in this code) Layer-2
- * Y (not in this code) Layer-3
- * N SinuSoidal Coding (Transient, Sinusoid, Noise)
- * Y Parametric Stereo
- * N Direct Stream Transfer
- * Y Enhanced AAC Low Delay (ER AAC ELD)
- *
- * Note: - HE AAC v1 comprises LC AAC with Spectral Band Replication.
- * - HE AAC v2 comprises LC AAC with Spectral Band Replication and
- Parametric Stereo.
- */
-
#include "libavutil/float_dsp.h"
#include "libavutil/opt.h"
#include "avcodec.h"
@@ -113,929 +64,6 @@
# include "mips/aacdec_mips.h"
#endif
-static VLC vlc_scalefactors;
-static VLC vlc_spectral[11];
-
-static int output_configure(AACContext *ac,
- uint8_t layout_map[MAX_ELEM_ID*4][3], int tags,
- enum OCStatus oc_type, int get_new_frame);
-
-#define overread_err "Input buffer exhausted before END element found\n"
-
-static int count_channels(uint8_t (*layout)[3], int tags)
-{
- int i, sum = 0;
- for (i = 0; i < tags; i++) {
- int syn_ele = layout[i][0];
- int pos = layout[i][2];
- sum += (1 + (syn_ele == TYPE_CPE)) *
- (pos != AAC_CHANNEL_OFF && pos != AAC_CHANNEL_CC);
- }
- return sum;
-}
-
-/**
- * Check for the channel element in the current channel position configuration.
- * If it exists, make sure the appropriate element is allocated and map the
- * channel order to match the internal FFmpeg channel layout.
- *
- * @param che_pos current channel position configuration
- * @param type channel element type
- * @param id channel element id
- * @param channels count of the number of channels in the configuration
- *
- * @return Returns error status. 0 - OK, !0 - error
- */
-static av_cold int che_configure(AACContext *ac,
- enum ChannelPosition che_pos,
- int type, int id, int *channels)
-{
- if (*channels >= MAX_CHANNELS)
- return AVERROR_INVALIDDATA;
- if (che_pos) {
- if (!ac->che[type][id]) {
- if (!(ac->che[type][id] = av_mallocz(sizeof(ChannelElement))))
- return AVERROR(ENOMEM);
- ff_aac_sbr_ctx_init(ac, &ac->che[type][id]->sbr);
- }
- if (type != TYPE_CCE) {
- if (*channels >= MAX_CHANNELS - (type == TYPE_CPE || (type == TYPE_SCE && ac->oc[1].m4ac.ps == 1))) {
- av_log(ac->avctx, AV_LOG_ERROR, "Too many channels\n");
- return AVERROR_INVALIDDATA;
- }
- ac->output_element[(*channels)++] = &ac->che[type][id]->ch[0];
- if (type == TYPE_CPE ||
- (type == TYPE_SCE && ac->oc[1].m4ac.ps == 1)) {
- ac->output_element[(*channels)++] = &ac->che[type][id]->ch[1];
- }
- }
- } else {
- if (ac->che[type][id])
- ff_aac_sbr_ctx_close(&ac->che[type][id]->sbr);
- av_freep(&ac->che[type][id]);
- }
- return 0;
-}
-
-static int frame_configure_elements(AVCodecContext *avctx)
-{
- AACContext *ac = avctx->priv_data;
- int type, id, ch, ret;
-
- /* set channel pointers to internal buffers by default */
- for (type = 0; type < 4; type++) {
- for (id = 0; id < MAX_ELEM_ID; id++) {
- ChannelElement *che = ac->che[type][id];
- if (che) {
- che->ch[0].ret = che->ch[0].ret_buf;
- che->ch[1].ret = che->ch[1].ret_buf;
- }
- }
- }
-
- /* get output buffer */
- av_frame_unref(ac->frame);
- if (!avctx->channels)
- return 1;
-
- ac->frame->nb_samples = 2048;
- if ((ret = ff_get_buffer(avctx, ac->frame, 0)) < 0)
- return ret;
-
- /* map output channel pointers to AVFrame data */
- for (ch = 0; ch < avctx->channels; ch++) {
- if (ac->output_element[ch])
- ac->output_element[ch]->ret = (float *)ac->frame->extended_data[ch];
- }
-
- return 0;
-}
-
-struct elem_to_channel {
- uint64_t av_position;
- uint8_t syn_ele;
- uint8_t elem_id;
- uint8_t aac_position;
-};
-
-static int assign_pair(struct elem_to_channel e2c_vec[MAX_ELEM_ID],
- uint8_t (*layout_map)[3], int offset, uint64_t left,
- uint64_t right, int pos)
-{
- if (layout_map[offset][0] == TYPE_CPE) {
- e2c_vec[offset] = (struct elem_to_channel) {
- .av_position = left | right,
- .syn_ele = TYPE_CPE,
- .elem_id = layout_map[offset][1],
- .aac_position = pos
- };
- return 1;
- } else {
- e2c_vec[offset] = (struct elem_to_channel) {
- .av_position = left,
- .syn_ele = TYPE_SCE,
- .elem_id = layout_map[offset][1],
- .aac_position = pos
- };
- e2c_vec[offset + 1] = (struct elem_to_channel) {
- .av_position = right,
- .syn_ele = TYPE_SCE,
- .elem_id = layout_map[offset + 1][1],
- .aac_position = pos
- };
- return 2;
- }
-}
-
-static int count_paired_channels(uint8_t (*layout_map)[3], int tags, int pos,
- int *current)
-{
- int num_pos_channels = 0;
- int first_cpe = 0;
- int sce_parity = 0;
- int i;
- for (i = *current; i < tags; i++) {
- if (layout_map[i][2] != pos)
- break;
- if (layout_map[i][0] == TYPE_CPE) {
- if (sce_parity) {
- if (pos == AAC_CHANNEL_FRONT && !first_cpe) {
- sce_parity = 0;
- } else {
- return -1;
- }
- }
- num_pos_channels += 2;
- first_cpe = 1;
- } else {
- num_pos_channels++;
- sce_parity ^= 1;
- }
- }
- if (sce_parity &&
- ((pos == AAC_CHANNEL_FRONT && first_cpe) || pos == AAC_CHANNEL_SIDE))
- return -1;
- *current = i;
- return num_pos_channels;
-}
-
-static uint64_t sniff_channel_order(uint8_t (*layout_map)[3], int tags)
-{
- int i, n, total_non_cc_elements;
- struct elem_to_channel e2c_vec[4 * MAX_ELEM_ID] = { { 0 } };
- int num_front_channels, num_side_channels, num_back_channels;
- uint64_t layout;
-
- if (FF_ARRAY_ELEMS(e2c_vec) < tags)
- return 0;
-
- i = 0;
- num_front_channels =
- count_paired_channels(layout_map, tags, AAC_CHANNEL_FRONT, &i);
- if (num_front_channels < 0)
- return 0;
- num_side_channels =
- count_paired_channels(layout_map, tags, AAC_CHANNEL_SIDE, &i);
- if (num_side_channels < 0)
- return 0;
- num_back_channels =
- count_paired_channels(layout_map, tags, AAC_CHANNEL_BACK, &i);
- if (num_back_channels < 0)
- return 0;
-
- if (num_side_channels == 0 && num_back_channels >= 4) {
- num_side_channels = 2;
- num_back_channels -= 2;
- }
-
- i = 0;
- if (num_front_channels & 1) {
- e2c_vec[i] = (struct elem_to_channel) {
- .av_position = AV_CH_FRONT_CENTER,
- .syn_ele = TYPE_SCE,
- .elem_id = layout_map[i][1],
- .aac_position = AAC_CHANNEL_FRONT
- };
- i++;
- num_front_channels--;
- }
- if (num_front_channels >= 4) {
- i += assign_pair(e2c_vec, layout_map, i,
- AV_CH_FRONT_LEFT_OF_CENTER,
- AV_CH_FRONT_RIGHT_OF_CENTER,
- AAC_CHANNEL_FRONT);
- num_front_channels -= 2;
- }
- if (num_front_channels >= 2) {
- i += assign_pair(e2c_vec, layout_map, i,
- AV_CH_FRONT_LEFT,
- AV_CH_FRONT_RIGHT,
- AAC_CHANNEL_FRONT);
- num_front_channels -= 2;
- }
- while (num_front_channels >= 2) {
- i += assign_pair(e2c_vec, layout_map, i,
- UINT64_MAX,
- UINT64_MAX,
- AAC_CHANNEL_FRONT);
- num_front_channels -= 2;
- }
-
- if (num_side_channels >= 2) {
- i += assign_pair(e2c_vec, layout_map, i,
- AV_CH_SIDE_LEFT,
- AV_CH_SIDE_RIGHT,
- AAC_CHANNEL_FRONT);
- num_side_channels -= 2;
- }
- while (num_side_channels >= 2) {
- i += assign_pair(e2c_vec, layout_map, i,
- UINT64_MAX,
- UINT64_MAX,
- AAC_CHANNEL_SIDE);
- num_side_channels -= 2;
- }
-
- while (num_back_channels >= 4) {
- i += assign_pair(e2c_vec, layout_map, i,
- UINT64_MAX,
- UINT64_MAX,
- AAC_CHANNEL_BACK);
- num_back_channels -= 2;
- }
- if (num_back_channels >= 2) {
- i += assign_pair(e2c_vec, layout_map, i,
- AV_CH_BACK_LEFT,
- AV_CH_BACK_RIGHT,
- AAC_CHANNEL_BACK);
- num_back_channels -= 2;
- }
- if (num_back_channels) {
- e2c_vec[i] = (struct elem_to_channel) {
- .av_position = AV_CH_BACK_CENTER,
- .syn_ele = TYPE_SCE,
- .elem_id = layout_map[i][1],
- .aac_position = AAC_CHANNEL_BACK
- };
- i++;
- num_back_channels--;
- }
-
- if (i < tags && layout_map[i][2] == AAC_CHANNEL_LFE) {
- e2c_vec[i] = (struct elem_to_channel) {
- .av_position = AV_CH_LOW_FREQUENCY,
- .syn_ele = TYPE_LFE,
- .elem_id = layout_map[i][1],
- .aac_position = AAC_CHANNEL_LFE
- };
- i++;
- }
- while (i < tags && layout_map[i][2] == AAC_CHANNEL_LFE) {
- e2c_vec[i] = (struct elem_to_channel) {
- .av_position = UINT64_MAX,
- .syn_ele = TYPE_LFE,
- .elem_id = layout_map[i][1],
- .aac_position = AAC_CHANNEL_LFE
- };
- i++;
- }
-
- // Must choose a stable sort
- total_non_cc_elements = n = i;
- do {
- int next_n = 0;
- for (i = 1; i < n; i++)
- if (e2c_vec[i - 1].av_position > e2c_vec[i].av_position) {
- FFSWAP(struct elem_to_channel, e2c_vec[i - 1], e2c_vec[i]);
- next_n = i;
- }
- n = next_n;
- } while (n > 0);
-
- layout = 0;
- for (i = 0; i < total_non_cc_elements; i++) {
- layout_map[i][0] = e2c_vec[i].syn_ele;
- layout_map[i][1] = e2c_vec[i].elem_id;
- layout_map[i][2] = e2c_vec[i].aac_position;
- if (e2c_vec[i].av_position != UINT64_MAX) {
- layout |= e2c_vec[i].av_position;
- }
- }
-
- return layout;
-}
-
-/**
- * Save current output configuration if and only if it has been locked.
- */
-static void push_output_configuration(AACContext *ac) {
- if (ac->oc[1].status == OC_LOCKED || ac->oc[0].status == OC_NONE) {
- ac->oc[0] = ac->oc[1];
- }
- ac->oc[1].status = OC_NONE;
-}
-
-/**
- * Restore the previous output configuration if and only if the current
- * configuration is unlocked.
- */
-static void pop_output_configuration(AACContext *ac) {
- if (ac->oc[1].status != OC_LOCKED && ac->oc[0].status != OC_NONE) {
- ac->oc[1] = ac->oc[0];
- ac->avctx->channels = ac->oc[1].channels;
- ac->avctx->channel_layout = ac->oc[1].channel_layout;
- output_configure(ac, ac->oc[1].layout_map, ac->oc[1].layout_map_tags,
- ac->oc[1].status, 0);
- }
-}
-
-/**
- * Configure output channel order based on the current program
- * configuration element.
- *
- * @return Returns error status. 0 - OK, !0 - error
- */
-static int output_configure(AACContext *ac,
- uint8_t layout_map[MAX_ELEM_ID * 4][3], int tags,
- enum OCStatus oc_type, int get_new_frame)
-{
- AVCodecContext *avctx = ac->avctx;
- int i, channels = 0, ret;
- uint64_t layout = 0;
- uint8_t id_map[TYPE_END][MAX_ELEM_ID] = {{ 0 }};
- uint8_t type_counts[TYPE_END] = { 0 };
-
- if (ac->oc[1].layout_map != layout_map) {
- memcpy(ac->oc[1].layout_map, layout_map, tags * sizeof(layout_map[0]));
- ac->oc[1].layout_map_tags = tags;
- }
- for (i = 0; i < tags; i++) {
- int type = layout_map[i][0];
- int id = layout_map[i][1];
- id_map[type][id] = type_counts[type]++;
- }
- // Try to sniff a reasonable channel order, otherwise output the
- // channels in the order the PCE declared them.
- if (avctx->request_channel_layout != AV_CH_LAYOUT_NATIVE)
- layout = sniff_channel_order(layout_map, tags);
- for (i = 0; i < tags; i++) {
- int type = layout_map[i][0];
- int id = layout_map[i][1];
- int iid = id_map[type][id];
- int position = layout_map[i][2];
- // Allocate or free elements depending on if they are in the
- // current program configuration.
- ret = che_configure(ac, position, type, iid, &channels);
- if (ret < 0)
- return ret;
- ac->tag_che_map[type][id] = ac->che[type][iid];
- }
- if (ac->oc[1].m4ac.ps == 1 && channels == 2) {
- if (layout == AV_CH_FRONT_CENTER) {
- layout = AV_CH_FRONT_LEFT|AV_CH_FRONT_RIGHT;
- } else {
- layout = 0;
- }
- }
-
- if (layout) avctx->channel_layout = layout;
- ac->oc[1].channel_layout = layout;
- avctx->channels = ac->oc[1].channels = channels;
- ac->oc[1].status = oc_type;
-
- if (get_new_frame) {
- if ((ret = frame_configure_elements(ac->avctx)) < 0)
- return ret;
- }
-
- return 0;
-}
-
-static void flush(AVCodecContext *avctx)
-{
- AACContext *ac= avctx->priv_data;
- int type, i, j;
-
- for (type = 3; type >= 0; type--) {
- for (i = 0; i < MAX_ELEM_ID; i++) {
- ChannelElement *che = ac->che[type][i];
- if (che) {
- for (j = 0; j <= 1; j++) {
- memset(che->ch[j].saved, 0, sizeof(che->ch[j].saved));
- }
- }
- }
- }
-}
-
-/**
- * Set up channel positions based on a default channel configuration
- * as specified in table 1.17.
- *
- * @return Returns error status. 0 - OK, !0 - error
- */
-static int set_default_channel_config(AVCodecContext *avctx,
- uint8_t (*layout_map)[3],
- int *tags,
- int channel_config)
-{
- if (channel_config < 1 || (channel_config > 7 && channel_config < 11) ||
- channel_config > 12) {
- av_log(avctx, AV_LOG_ERROR,
- "invalid default channel configuration (%d)\n",
- channel_config);
- return AVERROR_INVALIDDATA;
- }
- *tags = tags_per_config[channel_config];
- memcpy(layout_map, aac_channel_layout_map[channel_config - 1],
- *tags * sizeof(*layout_map));
-
- /*
- * AAC specification has 7.1(wide) as a default layout for 8-channel streams.
- * However, at least Nero AAC encoder encodes 7.1 streams using the default
- * channel config 7, mapping the side channels of the original audio stream
- * to the second AAC_CHANNEL_FRONT pair in the AAC stream. Similarly, e.g. FAAD
- * decodes the second AAC_CHANNEL_FRONT pair as side channels, therefore decoding
- * the incorrect streams as if they were correct (and as the encoder intended).
- *
- * As actual intended 7.1(wide) streams are very rare, default to assuming a
- * 7.1 layout was intended.
- */
- if (channel_config == 7 && avctx->strict_std_compliance < FF_COMPLIANCE_STRICT) {
- av_log(avctx, AV_LOG_INFO, "Assuming an incorrectly encoded 7.1 channel layout"
- " instead of a spec-compliant 7.1(wide) layout, use -strict %d to decode"
- " according to the specification instead.\n", FF_COMPLIANCE_STRICT);
- layout_map[2][2] = AAC_CHANNEL_SIDE;
- }
-
- return 0;
-}
-
-static ChannelElement *get_che(AACContext *ac, int type, int elem_id)
-{
- /* For PCE based channel configurations map the channels solely based
- * on tags. */
- if (!ac->oc[1].m4ac.chan_config) {
- return ac->tag_che_map[type][elem_id];
- }
- // Allow single CPE stereo files to be signalled with mono configuration.
- if (!ac->tags_mapped && type == TYPE_CPE &&
- ac->oc[1].m4ac.chan_config == 1) {
- uint8_t layout_map[MAX_ELEM_ID*4][3];
- int layout_map_tags;
- push_output_configuration(ac);
-
- av_log(ac->avctx, AV_LOG_DEBUG, "mono with CPE\n");
-
- if (set_default_channel_config(ac->avctx, layout_map,
- &layout_map_tags, 2) < 0)
- return NULL;
- if (output_configure(ac, layout_map, layout_map_tags,
- OC_TRIAL_FRAME, 1) < 0)
- return NULL;
-
- ac->oc[1].m4ac.chan_config = 2;
- ac->oc[1].m4ac.ps = 0;
- }
- // And vice-versa
- if (!ac->tags_mapped && type == TYPE_SCE &&
- ac->oc[1].m4ac.chan_config == 2) {
- uint8_t layout_map[MAX_ELEM_ID * 4][3];
- int layout_map_tags;
- push_output_configuration(ac);
-
- av_log(ac->avctx, AV_LOG_DEBUG, "stereo with SCE\n");
-
- if (set_default_channel_config(ac->avctx, layout_map,
- &layout_map_tags, 1) < 0)
- return NULL;
- if (output_configure(ac, layout_map, layout_map_tags,
- OC_TRIAL_FRAME, 1) < 0)
- return NULL;
-
- ac->oc[1].m4ac.chan_config = 1;
- if (ac->oc[1].m4ac.sbr)
- ac->oc[1].m4ac.ps = -1;
- }
- /* For indexed channel configurations map the channels solely based
- * on position. */
- switch (ac->oc[1].m4ac.chan_config) {
- case 12:
- case 7:
- if (ac->tags_mapped == 3 && type == TYPE_CPE) {
- ac->tags_mapped++;
- return ac->tag_che_map[TYPE_CPE][elem_id] = ac->che[TYPE_CPE][2];
- }
- case 11:
- if (ac->tags_mapped == 2 &&
- ac->oc[1].m4ac.chan_config == 11 &&
- type == TYPE_SCE) {
- ac->tags_mapped++;
- return ac->tag_che_map[TYPE_SCE][elem_id] = ac->che[TYPE_SCE][1];
- }
- case 6:
- /* Some streams incorrectly code 5.1 audio as
- * SCE[0] CPE[0] CPE[1] SCE[1]
- * instead of
- * SCE[0] CPE[0] CPE[1] LFE[0].
- * If we seem to have encountered such a stream, transfer
- * the LFE[0] element to the SCE[1]'s mapping */
- if (ac->tags_mapped == tags_per_config[ac->oc[1].m4ac.chan_config] - 1 && (type == TYPE_LFE || type == TYPE_SCE)) {
- if (!ac->warned_remapping_once && (type != TYPE_LFE || elem_id != 0)) {
- av_log(ac->avctx, AV_LOG_WARNING,
- "This stream seems to incorrectly report its last channel as %s[%d], mapping to LFE[0]\n",
- type == TYPE_SCE ? "SCE" : "LFE", elem_id);
- ac->warned_remapping_once++;
- }
- ac->tags_mapped++;
- return ac->tag_che_map[type][elem_id] = ac->che[TYPE_LFE][0];
- }
- case 5:
- if (ac->tags_mapped == 2 && type == TYPE_CPE) {
- ac->tags_mapped++;
- return ac->tag_che_map[TYPE_CPE][elem_id] = ac->che[TYPE_CPE][1];
- }
- case 4:
- /* Some streams incorrectly code 4.0 audio as
- * SCE[0] CPE[0] LFE[0]
- * instead of
- * SCE[0] CPE[0] SCE[1].
- * If we seem to have encountered such a stream, transfer
- * the SCE[1] element to the LFE[0]'s mapping */
- if (ac->tags_mapped == tags_per_config[ac->oc[1].m4ac.chan_config] - 1 && (type == TYPE_LFE || type == TYPE_SCE)) {
- if (!ac->warned_remapping_once && (type != TYPE_SCE || elem_id != 1)) {
- av_log(ac->avctx, AV_LOG_WARNING,
- "This stream seems to incorrectly report its last channel as %s[%d], mapping to SCE[1]\n",
- type == TYPE_SCE ? "SCE" : "LFE", elem_id);
- ac->warned_remapping_once++;
- }
- ac->tags_mapped++;
- return ac->tag_che_map[type][elem_id] = ac->che[TYPE_SCE][1];
- }
- if (ac->tags_mapped == 2 &&
- ac->oc[1].m4ac.chan_config == 4 &&
- type == TYPE_SCE) {
- ac->tags_mapped++;
- return ac->tag_che_map[TYPE_SCE][elem_id] = ac->che[TYPE_SCE][1];
- }
- case 3:
- case 2:
- if (ac->tags_mapped == (ac->oc[1].m4ac.chan_config != 2) &&
- type == TYPE_CPE) {
- ac->tags_mapped++;
- return ac->tag_che_map[TYPE_CPE][elem_id] = ac->che[TYPE_CPE][0];
- } else if (ac->oc[1].m4ac.chan_config == 2) {
- return NULL;
- }
- case 1:
- if (!ac->tags_mapped && type == TYPE_SCE) {
- ac->tags_mapped++;
- return ac->tag_che_map[TYPE_SCE][elem_id] = ac->che[TYPE_SCE][0];
- }
- default:
- return NULL;
- }
-}
-
-/**
- * Decode an array of 4 bit element IDs, optionally interleaved with a
- * stereo/mono switching bit.
- *
- * @param type speaker type/position for these channels
- */
-static void decode_channel_map(uint8_t layout_map[][3],
- enum ChannelPosition type,
- GetBitContext *gb, int n)
-{
- while (n--) {
- enum RawDataBlockType syn_ele;
- switch (type) {
- case AAC_CHANNEL_FRONT:
- case AAC_CHANNEL_BACK:
- case AAC_CHANNEL_SIDE:
- syn_ele = get_bits1(gb);
- break;
- case AAC_CHANNEL_CC:
- skip_bits1(gb);
- syn_ele = TYPE_CCE;
- break;
- case AAC_CHANNEL_LFE:
- syn_ele = TYPE_LFE;
- break;
- default:
- // AAC_CHANNEL_OFF has no channel map
- av_assert0(0);
- }
- layout_map[0][0] = syn_ele;
- layout_map[0][1] = get_bits(gb, 4);
- layout_map[0][2] = type;
- layout_map++;
- }
-}
-
-/**
- * Decode program configuration element; reference: table 4.2.
- *
- * @return Returns error status. 0 - OK, !0 - error
- */
-static int decode_pce(AVCodecContext *avctx, MPEG4AudioConfig *m4ac,
- uint8_t (*layout_map)[3],
- GetBitContext *gb)
-{
- int num_front, num_side, num_back, num_lfe, num_assoc_data, num_cc;
- int sampling_index;
- int comment_len;
- int tags;
-
- skip_bits(gb, 2); // object_type
-
- sampling_index = get_bits(gb, 4);
- if (m4ac->sampling_index != sampling_index)
- av_log(avctx, AV_LOG_WARNING,
- "Sample rate index in program config element does not "
- "match the sample rate index configured by the container.\n");
-
- num_front = get_bits(gb, 4);
- num_side = get_bits(gb, 4);
- num_back = get_bits(gb, 4);
- num_lfe = get_bits(gb, 2);
- num_assoc_data = get_bits(gb, 3);
- num_cc = get_bits(gb, 4);
-
- if (get_bits1(gb))
- skip_bits(gb, 4); // mono_mixdown_tag
- if (get_bits1(gb))
- skip_bits(gb, 4); // stereo_mixdown_tag
-
- if (get_bits1(gb))
- skip_bits(gb, 3); // mixdown_coeff_index and pseudo_surround
-
- if (get_bits_left(gb) < 4 * (num_front + num_side + num_back + num_lfe + num_assoc_data + num_cc)) {
- av_log(avctx, AV_LOG_ERROR, "decode_pce: " overread_err);
- return -1;
- }
- decode_channel_map(layout_map , AAC_CHANNEL_FRONT, gb, num_front);
- tags = num_front;
- decode_channel_map(layout_map + tags, AAC_CHANNEL_SIDE, gb, num_side);
- tags += num_side;
- decode_channel_map(layout_map + tags, AAC_CHANNEL_BACK, gb, num_back);
- tags += num_back;
- decode_channel_map(layout_map + tags, AAC_CHANNEL_LFE, gb, num_lfe);
- tags += num_lfe;
-
- skip_bits_long(gb, 4 * num_assoc_data);
-
- decode_channel_map(layout_map + tags, AAC_CHANNEL_CC, gb, num_cc);
- tags += num_cc;
-
- align_get_bits(gb);
-
- /* comment field, first byte is length */
- comment_len = get_bits(gb, 8) * 8;
- if (get_bits_left(gb) < comment_len) {
- av_log(avctx, AV_LOG_ERROR, "decode_pce: " overread_err);
- return AVERROR_INVALIDDATA;
- }
- skip_bits_long(gb, comment_len);
- return tags;
-}
-
-/**
- * Decode GA "General Audio" specific configuration; reference: table 4.1.
- *
- * @param ac pointer to AACContext, may be null
- * @param avctx pointer to AVCCodecContext, used for logging
- *
- * @return Returns error status. 0 - OK, !0 - error
- */
-static int decode_ga_specific_config(AACContext *ac, AVCodecContext *avctx,
- GetBitContext *gb,
- MPEG4AudioConfig *m4ac,
- int channel_config)
-{
- int extension_flag, ret, ep_config, res_flags;
- uint8_t layout_map[MAX_ELEM_ID*4][3];
- int tags = 0;
-
- if (get_bits1(gb)) { // frameLengthFlag
- avpriv_request_sample(avctx, "960/120 MDCT window");
- return AVERROR_PATCHWELCOME;
- }
- m4ac->frame_length_short = 0;
-
- if (get_bits1(gb)) // dependsOnCoreCoder
- skip_bits(gb, 14); // coreCoderDelay
- extension_flag = get_bits1(gb);
-
- if (m4ac->object_type == AOT_AAC_SCALABLE ||
- m4ac->object_type == AOT_ER_AAC_SCALABLE)
- skip_bits(gb, 3); // layerNr
-
- if (channel_config == 0) {
- skip_bits(gb, 4); // element_instance_tag
- tags = decode_pce(avctx, m4ac, layout_map, gb);
- if (tags < 0)
- return tags;
- } else {
- if ((ret = set_default_channel_config(avctx, layout_map,
- &tags, channel_config)))
- return ret;
- }
-
- if (count_channels(layout_map, tags) > 1) {
- m4ac->ps = 0;
- } else if (m4ac->sbr == 1 && m4ac->ps == -1)
- m4ac->ps = 1;
-
- if (ac && (ret = output_configure(ac, layout_map, tags, OC_GLOBAL_HDR, 0)))
- return ret;
-
- if (extension_flag) {
- switch (m4ac->object_type) {
- case AOT_ER_BSAC:
- skip_bits(gb, 5); // numOfSubFrame
- skip_bits(gb, 11); // layer_length
- break;
- case AOT_ER_AAC_LC:
- case AOT_ER_AAC_LTP:
- case AOT_ER_AAC_SCALABLE:
- case AOT_ER_AAC_LD:
- res_flags = get_bits(gb, 3);
- if (res_flags) {
- avpriv_report_missing_feature(avctx,
- "AAC data resilience (flags %x)",
- res_flags);
- return AVERROR_PATCHWELCOME;
- }
- break;
- }
- skip_bits1(gb); // extensionFlag3 (TBD in version 3)
- }
- switch (m4ac->object_type) {
- case AOT_ER_AAC_LC:
- case AOT_ER_AAC_LTP:
- case AOT_ER_AAC_SCALABLE:
- case AOT_ER_AAC_LD:
- ep_config = get_bits(gb, 2);
- if (ep_config) {
- avpriv_report_missing_feature(avctx,
- "epConfig %d", ep_config);
- return AVERROR_PATCHWELCOME;
- }
- }
- return 0;
-}
-
-static int decode_eld_specific_config(AACContext *ac, AVCodecContext *avctx,
- GetBitContext *gb,
- MPEG4AudioConfig *m4ac,
- int channel_config)
-{
- int ret, ep_config, res_flags;
- uint8_t layout_map[MAX_ELEM_ID*4][3];
- int tags = 0;
- const int ELDEXT_TERM = 0;
-
- m4ac->ps = 0;
- m4ac->sbr = 0;
-
- m4ac->frame_length_short = get_bits1(gb);
- res_flags = get_bits(gb, 3);
- if (res_flags) {
- avpriv_report_missing_feature(avctx,
- "AAC data resilience (flags %x)",
- res_flags);
- return AVERROR_PATCHWELCOME;
- }
-
- if (get_bits1(gb)) { // ldSbrPresentFlag
- avpriv_report_missing_feature(avctx,
- "Low Delay SBR");
- return AVERROR_PATCHWELCOME;
- }
-
- while (get_bits(gb, 4) != ELDEXT_TERM) {
- int len = get_bits(gb, 4);
- if (len == 15)
- len += get_bits(gb, 8);
- if (len == 15 + 255)
- len += get_bits(gb, 16);
- if (get_bits_left(gb) < len * 8 + 4) {
- av_log(avctx, AV_LOG_ERROR, overread_err);
- return AVERROR_INVALIDDATA;
- }
- skip_bits_long(gb, 8 * len);
- }
-
- if ((ret = set_default_channel_config(avctx, layout_map,
- &tags, channel_config)))
- return ret;
-
- if (ac && (ret = output_configure(ac, layout_map, tags, OC_GLOBAL_HDR, 0)))
- return ret;
-
- ep_config = get_bits(gb, 2);
- if (ep_config) {
- avpriv_report_missing_feature(avctx,
- "epConfig %d", ep_config);
- return AVERROR_PATCHWELCOME;
- }
- return 0;
-}
-
-/**
- * Decode audio specific configuration; reference: table 1.13.
- *
- * @param ac pointer to AACContext, may be null
- * @param avctx pointer to AVCCodecContext, used for logging
- * @param m4ac pointer to MPEG4AudioConfig, used for parsing
- * @param data pointer to buffer holding an audio specific config
- * @param bit_size size of audio specific config or data in bits
- * @param sync_extension look for an appended sync extension
- *
- * @return Returns error status or number of consumed bits. <0 - error
- */
-static int decode_audio_specific_config(AACContext *ac,
- AVCodecContext *avctx,
- MPEG4AudioConfig *m4ac,
- const uint8_t *data, int bit_size,
- int sync_extension)
-{
- GetBitContext gb;
- int i, ret;
-
- ff_dlog(avctx, "audio specific config size %d\n", bit_size >> 3);
- for (i = 0; i < bit_size >> 3; i++)
- ff_dlog(avctx, "%02x ", data[i]);
- ff_dlog(avctx, "\n");
-
- if ((ret = init_get_bits(&gb, data, bit_size)) < 0)
- return ret;
-
- if ((i = avpriv_mpeg4audio_get_config(m4ac, data, bit_size,
- sync_extension)) < 0)
- return AVERROR_INVALIDDATA;
- if (m4ac->sampling_index > 12) {
- av_log(avctx, AV_LOG_ERROR,
- "invalid sampling rate index %d\n",
- m4ac->sampling_index);
- return AVERROR_INVALIDDATA;
- }
- if (m4ac->object_type == AOT_ER_AAC_LD &&
- (m4ac->sampling_index < 3 || m4ac->sampling_index > 7)) {
- av_log(avctx, AV_LOG_ERROR,
- "invalid low delay sampling rate index %d\n",
- m4ac->sampling_index);
- return AVERROR_INVALIDDATA;
- }
-
- skip_bits_long(&gb, i);
-
- switch (m4ac->object_type) {
- case AOT_AAC_MAIN:
- case AOT_AAC_LC:
- case AOT_AAC_LTP:
- case AOT_ER_AAC_LC:
- case AOT_ER_AAC_LD:
- if ((ret = decode_ga_specific_config(ac, avctx, &gb,
- m4ac, m4ac->chan_config)) < 0)
- return ret;
- break;
- case AOT_ER_AAC_ELD:
- if ((ret = decode_eld_specific_config(ac, avctx, &gb,
- m4ac, m4ac->chan_config)) < 0)
- return ret;
- break;
- default:
- avpriv_report_missing_feature(avctx,
- "Audio object type %s%d",
- m4ac->sbr == 1 ? "SBR+" : "",
- m4ac->object_type);
- return AVERROR(ENOSYS);
- }
-
- ff_dlog(avctx,
- "AOT %d chan config %d sampling index %d (%d) SBR %d PS %d\n",
- m4ac->object_type, m4ac->chan_config, m4ac->sampling_index,
- m4ac->sample_rate, m4ac->sbr,
- m4ac->ps);
-
- return get_bits_count(&gb);
-}
-
-/**
- * linear congruential pseudorandom number generator
- *
- * @param previous_val pointer to the current state of the generator
- *
- * @return Returns a 32-bit pseudorandom integer
- */
-static av_always_inline int lcg_random(unsigned previous_val)
-{
- union { unsigned u; int s; } v = { previous_val * 1664525u + 1013904223 };
- return v.s;
-}
-
static av_always_inline void reset_predict_state(PredictorState *ps)
{
ps->r0 = 0.0f;
@@ -1046,514 +74,6 @@ static av_always_inline void reset_predict_state(PredictorState *ps)
ps->var1 = 1.0f;
}
-static void reset_all_predictors(PredictorState *ps)
-{
- int i;
- for (i = 0; i < MAX_PREDICTORS; i++)
- reset_predict_state(&ps[i]);
-}
-
-static int sample_rate_idx (int rate)
-{
- if (92017 <= rate) return 0;
- else if (75132 <= rate) return 1;
- else if (55426 <= rate) return 2;
- else if (46009 <= rate) return 3;
- else if (37566 <= rate) return 4;
- else if (27713 <= rate) return 5;
- else if (23004 <= rate) return 6;
- else if (18783 <= rate) return 7;
- else if (13856 <= rate) return 8;
- else if (11502 <= rate) return 9;
- else if (9391 <= rate) return 10;
- else return 11;
-}
-
-static void reset_predictor_group(PredictorState *ps, int group_num)
-{
- int i;
- for (i = group_num - 1; i < MAX_PREDICTORS; i += 30)
- reset_predict_state(&ps[i]);
-}
-
-#define AAC_INIT_VLC_STATIC(num, size) \
- INIT_VLC_STATIC(&vlc_spectral[num], 8, ff_aac_spectral_sizes[num], \
- ff_aac_spectral_bits[num], sizeof(ff_aac_spectral_bits[num][0]), \
- sizeof(ff_aac_spectral_bits[num][0]), \
- ff_aac_spectral_codes[num], sizeof(ff_aac_spectral_codes[num][0]), \
- sizeof(ff_aac_spectral_codes[num][0]), \
- size);
-
-static void aacdec_init(AACContext *ac);
-
-static av_cold int aac_decode_init(AVCodecContext *avctx)
-{
- AACContext *ac = avctx->priv_data;
- int ret;
-
- ac->avctx = avctx;
- ac->oc[1].m4ac.sample_rate = avctx->sample_rate;
-
- aacdec_init(ac);
-
- avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
-
- if (avctx->extradata_size > 0) {
- if ((ret = decode_audio_specific_config(ac, ac->avctx, &ac->oc[1].m4ac,
- avctx->extradata,
- avctx->extradata_size * 8,
- 1)) < 0)
- return ret;
- } else {
- int sr, i;
- uint8_t layout_map[MAX_ELEM_ID*4][3];
- int layout_map_tags;
-
- sr = sample_rate_idx(avctx->sample_rate);
- ac->oc[1].m4ac.sampling_index = sr;
- ac->oc[1].m4ac.channels = avctx->channels;
- ac->oc[1].m4ac.sbr = -1;
- ac->oc[1].m4ac.ps = -1;
-
- for (i = 0; i < FF_ARRAY_ELEMS(ff_mpeg4audio_channels); i++)
- if (ff_mpeg4audio_channels[i] == avctx->channels)
- break;
- if (i == FF_ARRAY_ELEMS(ff_mpeg4audio_channels)) {
- i = 0;
- }
- ac->oc[1].m4ac.chan_config = i;
-
- if (ac->oc[1].m4ac.chan_config) {
- int ret = set_default_channel_config(avctx, layout_map,
- &layout_map_tags, ac->oc[1].m4ac.chan_config);
- if (!ret)
- output_configure(ac, layout_map, layout_map_tags,
- OC_GLOBAL_HDR, 0);
- else if (avctx->err_recognition & AV_EF_EXPLODE)
- return AVERROR_INVALIDDATA;
- }
- }
-
- if (avctx->channels > MAX_CHANNELS) {
- av_log(avctx, AV_LOG_ERROR, "Too many channels\n");
- return AVERROR_INVALIDDATA;
- }
-
- AAC_INIT_VLC_STATIC( 0, 304);
- AAC_INIT_VLC_STATIC( 1, 270);
- AAC_INIT_VLC_STATIC( 2, 550);
- AAC_INIT_VLC_STATIC( 3, 300);
- AAC_INIT_VLC_STATIC( 4, 328);
- AAC_INIT_VLC_STATIC( 5, 294);
- AAC_INIT_VLC_STATIC( 6, 306);
- AAC_INIT_VLC_STATIC( 7, 268);
- AAC_INIT_VLC_STATIC( 8, 510);
- AAC_INIT_VLC_STATIC( 9, 366);
- AAC_INIT_VLC_STATIC(10, 462);
-
- ff_aac_sbr_init();
-
- ac->fdsp = avpriv_float_dsp_alloc(avctx->flags & CODEC_FLAG_BITEXACT);
- if (!ac->fdsp) {
- return AVERROR(ENOMEM);
- }
-
- ac->random_state = 0x1f2e3d4c;
-
- ff_aac_tableinit();
-
- INIT_VLC_STATIC(&vlc_scalefactors, 7,
- FF_ARRAY_ELEMS(ff_aac_scalefactor_code),
- ff_aac_scalefactor_bits,
- sizeof(ff_aac_scalefactor_bits[0]),
- sizeof(ff_aac_scalefactor_bits[0]),
- ff_aac_scalefactor_code,
- sizeof(ff_aac_scalefactor_code[0]),
- sizeof(ff_aac_scalefactor_code[0]),
- 352);
-
- ff_mdct_init(&ac->mdct, 11, 1, 1.0 / (32768.0 * 1024.0));
- ff_mdct_init(&ac->mdct_ld, 10, 1, 1.0 / (32768.0 * 512.0));
- ff_mdct_init(&ac->mdct_small, 8, 1, 1.0 / (32768.0 * 128.0));
- ff_mdct_init(&ac->mdct_ltp, 11, 0, -2.0 * 32768.0);
- ret = ff_imdct15_init(&ac->mdct480, 5);
- if (ret < 0)
- return ret;
-
- // window initialization
- ff_kbd_window_init(ff_aac_kbd_long_1024, 4.0, 1024);
- ff_kbd_window_init(ff_aac_kbd_short_128, 6.0, 128);
- ff_init_ff_sine_windows(10);
- ff_init_ff_sine_windows( 9);
- ff_init_ff_sine_windows( 7);
-
- cbrt_tableinit();
-
- return 0;
-}
-
-/**
- * Skip data_stream_element; reference: table 4.10.
- */
-static int skip_data_stream_element(AACContext *ac, GetBitContext *gb)
-{
- int byte_align = get_bits1(gb);
- int count = get_bits(gb, 8);
- if (count == 255)
- count += get_bits(gb, 8);
- if (byte_align)
- align_get_bits(gb);
-
- if (get_bits_left(gb) < 8 * count) {
- av_log(ac->avctx, AV_LOG_ERROR, "skip_data_stream_element: "overread_err);
- return AVERROR_INVALIDDATA;
- }
- skip_bits_long(gb, 8 * count);
- return 0;
-}
-
-static int decode_prediction(AACContext *ac, IndividualChannelStream *ics,
- GetBitContext *gb)
-{
- int sfb;
- if (get_bits1(gb)) {
- ics->predictor_reset_group = get_bits(gb, 5);
- if (ics->predictor_reset_group == 0 ||
- ics->predictor_reset_group > 30) {
- av_log(ac->avctx, AV_LOG_ERROR,
- "Invalid Predictor Reset Group.\n");
- return AVERROR_INVALIDDATA;
- }
- }
- for (sfb = 0; sfb < FFMIN(ics->max_sfb, ff_aac_pred_sfb_max[ac->oc[1].m4ac.sampling_index]); sfb++) {
- ics->prediction_used[sfb] = get_bits1(gb);
- }
- return 0;
-}
-
-/**
- * Decode Long Term Prediction data; reference: table 4.xx.
- */
-static void decode_ltp(LongTermPrediction *ltp,
- GetBitContext *gb, uint8_t max_sfb)
-{
- int sfb;
-
- ltp->lag = get_bits(gb, 11);
- ltp->coef = ltp_coef[get_bits(gb, 3)];
- for (sfb = 0; sfb < FFMIN(max_sfb, MAX_LTP_LONG_SFB); sfb++)
- ltp->used[sfb] = get_bits1(gb);
-}
-
-/**
- * Decode Individual Channel Stream info; reference: table 4.6.
- */
-static int decode_ics_info(AACContext *ac, IndividualChannelStream *ics,
- GetBitContext *gb)
-{
- const MPEG4AudioConfig *const m4ac = &ac->oc[1].m4ac;
- const int aot = m4ac->object_type;
- const int sampling_index = m4ac->sampling_index;
- if (aot != AOT_ER_AAC_ELD) {
- if (get_bits1(gb)) {
- av_log(ac->avctx, AV_LOG_ERROR, "Reserved bit set.\n");
- if (ac->avctx->err_recognition & AV_EF_BITSTREAM)
- return AVERROR_INVALIDDATA;
- }
- ics->window_sequence[1] = ics->window_sequence[0];
- ics->window_sequence[0] = get_bits(gb, 2);
- if (aot == AOT_ER_AAC_LD &&
- ics->window_sequence[0] != ONLY_LONG_SEQUENCE) {
- av_log(ac->avctx, AV_LOG_ERROR,
- "AAC LD is only defined for ONLY_LONG_SEQUENCE but "
- "window sequence %d found.\n", ics->window_sequence[0]);
- ics->window_sequence[0] = ONLY_LONG_SEQUENCE;
- return AVERROR_INVALIDDATA;
- }
- ics->use_kb_window[1] = ics->use_kb_window[0];
- ics->use_kb_window[0] = get_bits1(gb);
- }
- ics->num_window_groups = 1;
- ics->group_len[0] = 1;
- if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) {
- int i;
- ics->max_sfb = get_bits(gb, 4);
- for (i = 0; i < 7; i++) {
- if (get_bits1(gb)) {
- ics->group_len[ics->num_window_groups - 1]++;
- } else {
- ics->num_window_groups++;
- ics->group_len[ics->num_window_groups - 1] = 1;
- }
- }
- ics->num_windows = 8;
- ics->swb_offset = ff_swb_offset_128[sampling_index];
- ics->num_swb = ff_aac_num_swb_128[sampling_index];
- ics->tns_max_bands = ff_tns_max_bands_128[sampling_index];
- ics->predictor_present = 0;
- } else {
- ics->max_sfb = get_bits(gb, 6);
- ics->num_windows = 1;
- if (aot == AOT_ER_AAC_LD || aot == AOT_ER_AAC_ELD) {
- if (m4ac->frame_length_short) {
- ics->swb_offset = ff_swb_offset_480[sampling_index];
- ics->num_swb = ff_aac_num_swb_480[sampling_index];
- ics->tns_max_bands = ff_tns_max_bands_480[sampling_index];
- } else {
- ics->swb_offset = ff_swb_offset_512[sampling_index];
- ics->num_swb = ff_aac_num_swb_512[sampling_index];
- ics->tns_max_bands = ff_tns_max_bands_512[sampling_index];
- }
- if (!ics->num_swb || !ics->swb_offset)
- return AVERROR_BUG;
- } else {
- ics->swb_offset = ff_swb_offset_1024[sampling_index];
- ics->num_swb = ff_aac_num_swb_1024[sampling_index];
- ics->tns_max_bands = ff_tns_max_bands_1024[sampling_index];
- }
- if (aot != AOT_ER_AAC_ELD) {
- ics->predictor_present = get_bits1(gb);
- ics->predictor_reset_group = 0;
- }
- if (ics->predictor_present) {
- if (aot == AOT_AAC_MAIN) {
- if (decode_prediction(ac, ics, gb)) {
- goto fail;
- }
- } else if (aot == AOT_AAC_LC ||
- aot == AOT_ER_AAC_LC) {
- av_log(ac->avctx, AV_LOG_ERROR,
- "Prediction is not allowed in AAC-LC.\n");
- goto fail;
- } else {
- if (aot == AOT_ER_AAC_LD) {
- av_log(ac->avctx, AV_LOG_ERROR,
- "LTP in ER AAC LD not yet implemented.\n");
- return AVERROR_PATCHWELCOME;
- }
- if ((ics->ltp.present = get_bits(gb, 1)))
- decode_ltp(&ics->ltp, gb, ics->max_sfb);
- }
- }
- }
-
- if (ics->max_sfb > ics->num_swb) {
- av_log(ac->avctx, AV_LOG_ERROR,
- "Number of scalefactor bands in group (%d) "
- "exceeds limit (%d).\n",
- ics->max_sfb, ics->num_swb);
- goto fail;
- }
-
- return 0;
-fail:
- ics->max_sfb = 0;
- return AVERROR_INVALIDDATA;
-}
-
-/**
- * Decode band types (section_data payload); reference: table 4.46.
- *
- * @param band_type array of the used band type
- * @param band_type_run_end array of the last scalefactor band of a band type run
- *
- * @return Returns error status. 0 - OK, !0 - error
- */
-static int decode_band_types(AACContext *ac, enum BandType band_type[120],
- int band_type_run_end[120], GetBitContext *gb,
- IndividualChannelStream *ics)
-{
- int g, idx = 0;
- const int bits = (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) ? 3 : 5;
- for (g = 0; g < ics->num_window_groups; g++) {
- int k = 0;
- while (k < ics->max_sfb) {
- uint8_t sect_end = k;
- int sect_len_incr;
- int sect_band_type = get_bits(gb, 4);
- if (sect_band_type == 12) {
- av_log(ac->avctx, AV_LOG_ERROR, "invalid band type\n");
- return AVERROR_INVALIDDATA;
- }
- do {
- sect_len_incr = get_bits(gb, bits);
- sect_end += sect_len_incr;
- if (get_bits_left(gb) < 0) {
- av_log(ac->avctx, AV_LOG_ERROR, "decode_band_types: "overread_err);
- return AVERROR_INVALIDDATA;
- }
- if (sect_end > ics->max_sfb) {
- av_log(ac->avctx, AV_LOG_ERROR,
- "Number of bands (%d) exceeds limit (%d).\n",
- sect_end, ics->max_sfb);
- return AVERROR_INVALIDDATA;
- }
- } while (sect_len_incr == (1 << bits) - 1);
- for (; k < sect_end; k++) {
- band_type [idx] = sect_band_type;
- band_type_run_end[idx++] = sect_end;
- }
- }
- }
- return 0;
-}
-
-/**
- * Decode scalefactors; reference: table 4.47.
- *
- * @param global_gain first scalefactor value as scalefactors are differentially coded
- * @param band_type array of the used band type
- * @param band_type_run_end array of the last scalefactor band of a band type run
- * @param sf array of scalefactors or intensity stereo positions
- *
- * @return Returns error status. 0 - OK, !0 - error
- */
-static int decode_scalefactors(AACContext *ac, float sf[120], GetBitContext *gb,
- unsigned int global_gain,
- IndividualChannelStream *ics,
- enum BandType band_type[120],
- int band_type_run_end[120])
-{
- int g, i, idx = 0;
- int offset[3] = { global_gain, global_gain - NOISE_OFFSET, 0 };
- int clipped_offset;
- int noise_flag = 1;
- for (g = 0; g < ics->num_window_groups; g++) {
- for (i = 0; i < ics->max_sfb;) {
- int run_end = band_type_run_end[idx];
- if (band_type[idx] == ZERO_BT) {
- for (; i < run_end; i++, idx++)
- sf[idx] = 0.0;
- } else if ((band_type[idx] == INTENSITY_BT) ||
- (band_type[idx] == INTENSITY_BT2)) {
- for (; i < run_end; i++, idx++) {
- offset[2] += get_vlc2(gb, vlc_scalefactors.table, 7, 3) - SCALE_DIFF_ZERO;
- clipped_offset = av_clip(offset[2], -155, 100);
- if (offset[2] != clipped_offset) {
- avpriv_request_sample(ac->avctx,
- "If you heard an audible artifact, there may be a bug in the decoder. "
- "Clipped intensity stereo position (%d -> %d)",
- offset[2], clipped_offset);
- }
- sf[idx] = ff_aac_pow2sf_tab[-clipped_offset + POW_SF2_ZERO];
- }
- } else if (band_type[idx] == NOISE_BT) {
- for (; i < run_end; i++, idx++) {
- if (noise_flag-- > 0)
- offset[1] += get_bits(gb, NOISE_PRE_BITS) - NOISE_PRE;
- else
- offset[1] += get_vlc2(gb, vlc_scalefactors.table, 7, 3) - SCALE_DIFF_ZERO;
- clipped_offset = av_clip(offset[1], -100, 155);
- if (offset[1] != clipped_offset) {
- avpriv_request_sample(ac->avctx,
- "If you heard an audible artifact, there may be a bug in the decoder. "
- "Clipped noise gain (%d -> %d)",
- offset[1], clipped_offset);
- }
- sf[idx] = -ff_aac_pow2sf_tab[clipped_offset + POW_SF2_ZERO];
- }
- } else {
- for (; i < run_end; i++, idx++) {
- offset[0] += get_vlc2(gb, vlc_scalefactors.table, 7, 3) - SCALE_DIFF_ZERO;
- if (offset[0] > 255U) {
- av_log(ac->avctx, AV_LOG_ERROR,
- "Scalefactor (%d) out of range.\n", offset[0]);
- return AVERROR_INVALIDDATA;
- }
- sf[idx] = -ff_aac_pow2sf_tab[offset[0] - 100 + POW_SF2_ZERO];
- }
- }
- }
- }
- return 0;
-}
-
-/**
- * Decode pulse data; reference: table 4.7.
- */
-static int decode_pulses(Pulse *pulse, GetBitContext *gb,
- const uint16_t *swb_offset, int num_swb)
-{
- int i, pulse_swb;
- pulse->num_pulse = get_bits(gb, 2) + 1;
- pulse_swb = get_bits(gb, 6);
- if (pulse_swb >= num_swb)
- return -1;
- pulse->pos[0] = swb_offset[pulse_swb];
- pulse->pos[0] += get_bits(gb, 5);
- if (pulse->pos[0] >= swb_offset[num_swb])
- return -1;
- pulse->amp[0] = get_bits(gb, 4);
- for (i = 1; i < pulse->num_pulse; i++) {
- pulse->pos[i] = get_bits(gb, 5) + pulse->pos[i - 1];
- if (pulse->pos[i] >= swb_offset[num_swb])
- return -1;
- pulse->amp[i] = get_bits(gb, 4);
- }
- return 0;
-}
-
-/**
- * Decode Temporal Noise Shaping data; reference: table 4.48.
- *
- * @return Returns error status. 0 - OK, !0 - error
- */
-static int decode_tns(AACContext *ac, TemporalNoiseShaping *tns,
- GetBitContext *gb, const IndividualChannelStream *ics)
-{
- int w, filt, i, coef_len, coef_res, coef_compress;
- const int is8 = ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE;
- const int tns_max_order = is8 ? 7 : ac->oc[1].m4ac.object_type == AOT_AAC_MAIN ? 20 : 12;
- for (w = 0; w < ics->num_windows; w++) {
- if ((tns->n_filt[w] = get_bits(gb, 2 - is8))) {
- coef_res = get_bits1(gb);
-
- for (filt = 0; filt < tns->n_filt[w]; filt++) {
- int tmp2_idx;
- tns->length[w][filt] = get_bits(gb, 6 - 2 * is8);
-
- if ((tns->order[w][filt] = get_bits(gb, 5 - 2 * is8)) > tns_max_order) {
- av_log(ac->avctx, AV_LOG_ERROR,
- "TNS filter order %d is greater than maximum %d.\n",
- tns->order[w][filt], tns_max_order);
- tns->order[w][filt] = 0;
- return AVERROR_INVALIDDATA;
- }
- if (tns->order[w][filt]) {
- tns->direction[w][filt] = get_bits1(gb);
- coef_compress = get_bits1(gb);
- coef_len = coef_res + 3 - coef_compress;
- tmp2_idx = 2 * coef_compress + coef_res;
-
- for (i = 0; i < tns->order[w][filt]; i++)
- tns->coef[w][filt][i] = tns_tmp2_map[tmp2_idx][get_bits(gb, coef_len)];
- }
- }
- }
- }
- return 0;
-}
-
-/**
- * Decode Mid/Side data; reference: table 4.54.
- *
- * @param ms_present Indicates mid/side stereo presence. [0] mask is all 0s;
- * [1] mask is decoded from bitstream; [2] mask is all 1s;
- * [3] reserved for scalable AAC
- */
-static void decode_mid_side_stereo(ChannelElement *cpe, GetBitContext *gb,
- int ms_present)
-{
- int idx;
- int max_idx = cpe->ch[0].ics.num_window_groups * cpe->ch[0].ics.max_sfb;
- if (ms_present == 1) {
- for (idx = 0; idx < max_idx; idx++)
- cpe->ms_mask[idx] = get_bits1(gb);
- } else if (ms_present == 2) {
- memset(cpe->ms_mask, 1, max_idx * sizeof(cpe->ms_mask[0]));
- }
-}
-
#ifndef VMUL2
static inline float *VMUL2(float *dst, const float *v, unsigned idx,
const float *scale)
@@ -1622,233 +142,6 @@ static inline float *VMUL4S(float *dst, const float *v, unsigned idx,
}
#endif
-/**
- * Decode spectral data; reference: table 4.50.
- * Dequantize and scale spectral data; reference: 4.6.3.3.
- *
- * @param coef array of dequantized, scaled spectral data
- * @param sf array of scalefactors or intensity stereo positions
- * @param pulse_present set if pulses are present
- * @param pulse pointer to pulse data struct
- * @param band_type array of the used band type
- *
- * @return Returns error status. 0 - OK, !0 - error
- */
-static int decode_spectrum_and_dequant(AACContext *ac, float coef[1024],
- GetBitContext *gb, const float sf[120],
- int pulse_present, const Pulse *pulse,
- const IndividualChannelStream *ics,
- enum BandType band_type[120])
-{
- int i, k, g, idx = 0;
- const int c = 1024 / ics->num_windows;
- const uint16_t *offsets = ics->swb_offset;
- float *coef_base = coef;
-
- for (g = 0; g < ics->num_windows; g++)
- memset(coef + g * 128 + offsets[ics->max_sfb], 0,
- sizeof(float) * (c - offsets[ics->max_sfb]));
-
- for (g = 0; g < ics->num_window_groups; g++) {
- unsigned g_len = ics->group_len[g];
-
- for (i = 0; i < ics->max_sfb; i++, idx++) {
- const unsigned cbt_m1 = band_type[idx] - 1;
- float *cfo = coef + offsets[i];
- int off_len = offsets[i + 1] - offsets[i];
- int group;
-
- if (cbt_m1 >= INTENSITY_BT2 - 1) {
- for (group = 0; group < g_len; group++, cfo+=128) {
- memset(cfo, 0, off_len * sizeof(float));
- }
- } else if (cbt_m1 == NOISE_BT - 1) {
- for (group = 0; group < g_len; group++, cfo+=128) {
- float scale;
- float band_energy;
-
- for (k = 0; k < off_len; k++) {
- ac->random_state = lcg_random(ac->random_state);
- cfo[k] = ac->random_state;
- }
-
- band_energy = ac->fdsp->scalarproduct_float(cfo, cfo, off_len);
- scale = sf[idx] / sqrtf(band_energy);
- ac->fdsp->vector_fmul_scalar(cfo, cfo, scale, off_len);
- }
- } else {
- const float *vq = ff_aac_codebook_vector_vals[cbt_m1];
- const uint16_t *cb_vector_idx = ff_aac_codebook_vector_idx[cbt_m1];
- VLC_TYPE (*vlc_tab)[2] = vlc_spectral[cbt_m1].table;
- OPEN_READER(re, gb);
-
- switch (cbt_m1 >> 1) {
- case 0:
- for (group = 0; group < g_len; group++, cfo+=128) {
- float *cf = cfo;
- int len = off_len;
-
- do {
- int code;
- unsigned cb_idx;
-
- UPDATE_CACHE(re, gb);
- GET_VLC(code, re, gb, vlc_tab, 8, 2);
- cb_idx = cb_vector_idx[code];
- cf = VMUL4(cf, vq, cb_idx, sf + idx);
- } while (len -= 4);
- }
- break;
-
- case 1:
- for (group = 0; group < g_len; group++, cfo+=128) {
- float *cf = cfo;
- int len = off_len;
-
- do {
- int code;
- unsigned nnz;
- unsigned cb_idx;
- uint32_t bits;
-
- UPDATE_CACHE(re, gb);
- GET_VLC(code, re, gb, vlc_tab, 8, 2);
- cb_idx = cb_vector_idx[code];
- nnz = cb_idx >> 8 & 15;
- bits = nnz ? GET_CACHE(re, gb) : 0;
- LAST_SKIP_BITS(re, gb, nnz);
- cf = VMUL4S(cf, vq, cb_idx, bits, sf + idx);
- } while (len -= 4);
- }
- break;
-
- case 2:
- for (group = 0; group < g_len; group++, cfo+=128) {
- float *cf = cfo;
- int len = off_len;
-
- do {
- int code;
- unsigned cb_idx;
-
- UPDATE_CACHE(re, gb);
- GET_VLC(code, re, gb, vlc_tab, 8, 2);
- cb_idx = cb_vector_idx[code];
- cf = VMUL2(cf, vq, cb_idx, sf + idx);
- } while (len -= 2);
- }
- break;
-
- case 3:
- case 4:
- for (group = 0; group < g_len; group++, cfo+=128) {
- float *cf = cfo;
- int len = off_len;
-
- do {
- int code;
- unsigned nnz;
- unsigned cb_idx;
- unsigned sign;
-
- UPDATE_CACHE(re, gb);
- GET_VLC(code, re, gb, vlc_tab, 8, 2);
- cb_idx = cb_vector_idx[code];
- nnz = cb_idx >> 8 & 15;
- sign = nnz ? SHOW_UBITS(re, gb, nnz) << (cb_idx >> 12) : 0;
- LAST_SKIP_BITS(re, gb, nnz);
- cf = VMUL2S(cf, vq, cb_idx, sign, sf + idx);
- } while (len -= 2);
- }
- break;
-
- default:
- for (group = 0; group < g_len; group++, cfo+=128) {
- float *cf = cfo;
- uint32_t *icf = (uint32_t *) cf;
- int len = off_len;
-
- do {
- int code;
- unsigned nzt, nnz;
- unsigned cb_idx;
- uint32_t bits;
- int j;
-
- UPDATE_CACHE(re, gb);
- GET_VLC(code, re, gb, vlc_tab, 8, 2);
-
- if (!code) {
- *icf++ = 0;
- *icf++ = 0;
- continue;
- }
-
- cb_idx = cb_vector_idx[code];
- nnz = cb_idx >> 12;
- nzt = cb_idx >> 8;
- bits = SHOW_UBITS(re, gb, nnz) << (32-nnz);
- LAST_SKIP_BITS(re, gb, nnz);
-
- for (j = 0; j < 2; j++) {
- if (nzt & 1<<j) {
- uint32_t b;
- int n;
- /* The total length of escape_sequence must be < 22 bits according
- to the specification (i.e. max is 111111110xxxxxxxxxxxx). */
- UPDATE_CACHE(re, gb);
- b = GET_CACHE(re, gb);
- b = 31 - av_log2(~b);
-
- if (b > 8) {
- av_log(ac->avctx, AV_LOG_ERROR, "error in spectral data, ESC overflow\n");
- return AVERROR_INVALIDDATA;
- }
-
- SKIP_BITS(re, gb, b + 1);
- b += 4;
- n = (1 << b) + SHOW_UBITS(re, gb, b);
- LAST_SKIP_BITS(re, gb, b);
- *icf++ = cbrt_tab[n] | (bits & 1U<<31);
- bits <<= 1;
- } else {
- unsigned v = ((const uint32_t*)vq)[cb_idx & 15];
- *icf++ = (bits & 1U<<31) | v;
- bits <<= !!v;
- }
- cb_idx >>= 4;
- }
- } while (len -= 2);
-
- ac->fdsp->vector_fmul_scalar(cfo, cfo, sf[idx], off_len);
- }
- }
-
- CLOSE_READER(re, gb);
- }
- }
- coef += g_len << 7;
- }
-
- if (pulse_present) {
- idx = 0;
- for (i = 0; i < pulse->num_pulse; i++) {
- float co = coef_base[ pulse->pos[i] ];
- while (offsets[idx + 1] <= pulse->pos[i])
- idx++;
- if (band_type[idx] != NOISE_BT && sf[idx]) {
- float ico = -pulse->amp[i];
- if (co) {
- co /= sf[idx];
- ico = co / sqrtf(sqrtf(fabsf(co))) + (co > 0 ? -ico : ico);
- }
- coef_base[ pulse->pos[i] ] = cbrtf(fabsf(ico)) * ico * sf[idx];
- }
- }
- }
- return 0;
-}
-
static av_always_inline float flt16_round(float pf)
{
union av_intfloat32 tmp;
@@ -1905,771 +198,6 @@ static av_always_inline void predict(PredictorState *ps, float *coef,
}
/**
- * Apply AAC-Main style frequency domain prediction.
- */
-static void apply_prediction(AACContext *ac, SingleChannelElement *sce)
-{
- int sfb, k;
-
- if (!sce->ics.predictor_initialized) {
- reset_all_predictors(sce->predictor_state);
- sce->ics.predictor_initialized = 1;
- }
-
- if (sce->ics.window_sequence[0] != EIGHT_SHORT_SEQUENCE) {
- for (sfb = 0;
- sfb < ff_aac_pred_sfb_max[ac->oc[1].m4ac.sampling_index];
- sfb++) {
- for (k = sce->ics.swb_offset[sfb];
- k < sce->ics.swb_offset[sfb + 1];
- k++) {
- predict(&sce->predictor_state[k], &sce->coeffs[k],
- sce->ics.predictor_present &&
- sce->ics.prediction_used[sfb]);
- }
- }
- if (sce->ics.predictor_reset_group)
- reset_predictor_group(sce->predictor_state,
- sce->ics.predictor_reset_group);
- } else
- reset_all_predictors(sce->predictor_state);
-}
-
-/**
- * Decode an individual_channel_stream payload; reference: table 4.44.
- *
- * @param common_window Channels have independent [0], or shared [1], Individual Channel Stream information.
- * @param scale_flag scalable [1] or non-scalable [0] AAC (Unused until scalable AAC is implemented.)
- *
- * @return Returns error status. 0 - OK, !0 - error
- */
-static int decode_ics(AACContext *ac, SingleChannelElement *sce,
- GetBitContext *gb, int common_window, int scale_flag)
-{
- Pulse pulse;
- TemporalNoiseShaping *tns = &sce->tns;
- IndividualChannelStream *ics = &sce->ics;
- float *out = sce->coeffs;
- int global_gain, eld_syntax, er_syntax, pulse_present = 0;
- int ret;
-
- eld_syntax = ac->oc[1].m4ac.object_type == AOT_ER_AAC_ELD;
- er_syntax = ac->oc[1].m4ac.object_type == AOT_ER_AAC_LC ||
- ac->oc[1].m4ac.object_type == AOT_ER_AAC_LTP ||
- ac->oc[1].m4ac.object_type == AOT_ER_AAC_LD ||
- ac->oc[1].m4ac.object_type == AOT_ER_AAC_ELD;
-
- /* This assignment is to silence a GCC warning about the variable being used
- * uninitialized when in fact it always is.
- */
- pulse.num_pulse = 0;
-
- global_gain = get_bits(gb, 8);
-
- if (!common_window && !scale_flag) {
- if (decode_ics_info(ac, ics, gb) < 0)
- return AVERROR_INVALIDDATA;
- }
-
- if ((ret = decode_band_types(ac, sce->band_type,
- sce->band_type_run_end, gb, ics)) < 0)
- return ret;
- if ((ret = decode_scalefactors(ac, sce->sf, gb, global_gain, ics,
- sce->band_type, sce->band_type_run_end)) < 0)
- return ret;
-
- pulse_present = 0;
- if (!scale_flag) {
- if (!eld_syntax && (pulse_present = get_bits1(gb))) {
- if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) {
- av_log(ac->avctx, AV_LOG_ERROR,
- "Pulse tool not allowed in eight short sequence.\n");
- return AVERROR_INVALIDDATA;
- }
- if (decode_pulses(&pulse, gb, ics->swb_offset, ics->num_swb)) {
- av_log(ac->avctx, AV_LOG_ERROR,
- "Pulse data corrupt or invalid.\n");
- return AVERROR_INVALIDDATA;
- }
- }
- tns->present = get_bits1(gb);
- if (tns->present && !er_syntax)
- if (decode_tns(ac, tns, gb, ics) < 0)
- return AVERROR_INVALIDDATA;
- if (!eld_syntax && get_bits1(gb)) {
- avpriv_request_sample(ac->avctx, "SSR");
- return AVERROR_PATCHWELCOME;
- }
- // I see no textual basis in the spec for this occurring after SSR gain
- // control, but this is what both reference and real implmentations do
- if (tns->present && er_syntax)
- if (decode_tns(ac, tns, gb, ics) < 0)
- return AVERROR_INVALIDDATA;
- }
-
- if (decode_spectrum_and_dequant(ac, out, gb, sce->sf, pulse_present,
- &pulse, ics, sce->band_type) < 0)
- return AVERROR_INVALIDDATA;
-
- if (ac->oc[1].m4ac.object_type == AOT_AAC_MAIN && !common_window)
- apply_prediction(ac, sce);
-
- return 0;
-}
-
-/**
- * Mid/Side stereo decoding; reference: 4.6.8.1.3.
- */
-static void apply_mid_side_stereo(AACContext *ac, ChannelElement *cpe)
-{
- const IndividualChannelStream *ics = &cpe->ch[0].ics;
- float *ch0 = cpe->ch[0].coeffs;
- float *ch1 = cpe->ch[1].coeffs;
- int g, i, group, idx = 0;
- const uint16_t *offsets = ics->swb_offset;
- for (g = 0; g < ics->num_window_groups; g++) {
- for (i = 0; i < ics->max_sfb; i++, idx++) {
- if (cpe->ms_mask[idx] &&
- cpe->ch[0].band_type[idx] < NOISE_BT &&
- cpe->ch[1].band_type[idx] < NOISE_BT) {
- for (group = 0; group < ics->group_len[g]; group++) {
- ac->fdsp->butterflies_float(ch0 + group * 128 + offsets[i],
- ch1 + group * 128 + offsets[i],
- offsets[i+1] - offsets[i]);
- }
- }
- }
- ch0 += ics->group_len[g] * 128;
- ch1 += ics->group_len[g] * 128;
- }
-}
-
-/**
- * intensity stereo decoding; reference: 4.6.8.2.3
- *
- * @param ms_present Indicates mid/side stereo presence. [0] mask is all 0s;
- * [1] mask is decoded from bitstream; [2] mask is all 1s;
- * [3] reserved for scalable AAC
- */
-static void apply_intensity_stereo(AACContext *ac,
- ChannelElement *cpe, int ms_present)
-{
- const IndividualChannelStream *ics = &cpe->ch[1].ics;
- SingleChannelElement *sce1 = &cpe->ch[1];
- float *coef0 = cpe->ch[0].coeffs, *coef1 = cpe->ch[1].coeffs;
- const uint16_t *offsets = ics->swb_offset;
- int g, group, i, idx = 0;
- int c;
- float scale;
- for (g = 0; g < ics->num_window_groups; g++) {
- for (i = 0; i < ics->max_sfb;) {
- if (sce1->band_type[idx] == INTENSITY_BT ||
- sce1->band_type[idx] == INTENSITY_BT2) {
- const int bt_run_end = sce1->band_type_run_end[idx];
- for (; i < bt_run_end; i++, idx++) {
- c = -1 + 2 * (sce1->band_type[idx] - 14);
- if (ms_present)
- c *= 1 - 2 * cpe->ms_mask[idx];
- scale = c * sce1->sf[idx];
- for (group = 0; group < ics->group_len[g]; group++)
- ac->fdsp->vector_fmul_scalar(coef1 + group * 128 + offsets[i],
- coef0 + group * 128 + offsets[i],
- scale,
- offsets[i + 1] - offsets[i]);
- }
- } else {
- int bt_run_end = sce1->band_type_run_end[idx];
- idx += bt_run_end - i;
- i = bt_run_end;
- }
- }
- coef0 += ics->group_len[g] * 128;
- coef1 += ics->group_len[g] * 128;
- }
-}
-
-/**
- * Decode a channel_pair_element; reference: table 4.4.
- *
- * @return Returns error status. 0 - OK, !0 - error
- */
-static int decode_cpe(AACContext *ac, GetBitContext *gb, ChannelElement *cpe)
-{
- int i, ret, common_window, ms_present = 0;
- int eld_syntax = ac->oc[1].m4ac.object_type == AOT_ER_AAC_ELD;
-
- common_window = eld_syntax || get_bits1(gb);
- if (common_window) {
- if (decode_ics_info(ac, &cpe->ch[0].ics, gb))
- return AVERROR_INVALIDDATA;
- i = cpe->ch[1].ics.use_kb_window[0];
- cpe->ch[1].ics = cpe->ch[0].ics;
- cpe->ch[1].ics.use_kb_window[1] = i;
- if (cpe->ch[1].ics.predictor_present &&
- (ac->oc[1].m4ac.object_type != AOT_AAC_MAIN))
- if ((cpe->ch[1].ics.ltp.present = get_bits(gb, 1)))
- decode_ltp(&cpe->ch[1].ics.ltp, gb, cpe->ch[1].ics.max_sfb);
- ms_present = get_bits(gb, 2);
- if (ms_present == 3) {
- av_log(ac->avctx, AV_LOG_ERROR, "ms_present = 3 is reserved.\n");
- return AVERROR_INVALIDDATA;
- } else if (ms_present)
- decode_mid_side_stereo(cpe, gb, ms_present);
- }
- if ((ret = decode_ics(ac, &cpe->ch[0], gb, common_window, 0)))
- return ret;
- if ((ret = decode_ics(ac, &cpe->ch[1], gb, common_window, 0)))
- return ret;
-
- if (common_window) {
- if (ms_present)
- apply_mid_side_stereo(ac, cpe);
- if (ac->oc[1].m4ac.object_type == AOT_AAC_MAIN) {
- apply_prediction(ac, &cpe->ch[0]);
- apply_prediction(ac, &cpe->ch[1]);
- }
- }
-
- apply_intensity_stereo(ac, cpe, ms_present);
- return 0;
-}
-
-static const float cce_scale[] = {
- 1.09050773266525765921, //2^(1/8)
- 1.18920711500272106672, //2^(1/4)
- M_SQRT2,
- 2,
-};
-
-/**
- * Decode coupling_channel_element; reference: table 4.8.
- *
- * @return Returns error status. 0 - OK, !0 - error
- */
-static int decode_cce(AACContext *ac, GetBitContext *gb, ChannelElement *che)
-{
- int num_gain = 0;
- int c, g, sfb, ret;
- int sign;
- float scale;
- SingleChannelElement *sce = &che->ch[0];
- ChannelCoupling *coup = &che->coup;
-
- coup->coupling_point = 2 * get_bits1(gb);
- coup->num_coupled = get_bits(gb, 3);
- for (c = 0; c <= coup->num_coupled; c++) {
- num_gain++;
- coup->type[c] = get_bits1(gb) ? TYPE_CPE : TYPE_SCE;
- coup->id_select[c] = get_bits(gb, 4);
- if (coup->type[c] == TYPE_CPE) {
- coup->ch_select[c] = get_bits(gb, 2);
- if (coup->ch_select[c] == 3)
- num_gain++;
- } else
- coup->ch_select[c] = 2;
- }
- coup->coupling_point += get_bits1(gb) || (coup->coupling_point >> 1);
-
- sign = get_bits(gb, 1);
- scale = cce_scale[get_bits(gb, 2)];
-
- if ((ret = decode_ics(ac, sce, gb, 0, 0)))
- return ret;
-
- for (c = 0; c < num_gain; c++) {
- int idx = 0;
- int cge = 1;
- int gain = 0;
- float gain_cache = 1.0;
- if (c) {
- cge = coup->coupling_point == AFTER_IMDCT ? 1 : get_bits1(gb);
- gain = cge ? get_vlc2(gb, vlc_scalefactors.table, 7, 3) - 60: 0;
- gain_cache = powf(scale, -gain);
- }
- if (coup->coupling_point == AFTER_IMDCT) {
- coup->gain[c][0] = gain_cache;
- } else {
- for (g = 0; g < sce->ics.num_window_groups; g++) {
- for (sfb = 0; sfb < sce->ics.max_sfb; sfb++, idx++) {
- if (sce->band_type[idx] != ZERO_BT) {
- if (!cge) {
- int t = get_vlc2(gb, vlc_scalefactors.table, 7, 3) - 60;
- if (t) {
- int s = 1;
- t = gain += t;
- if (sign) {
- s -= 2 * (t & 0x1);
- t >>= 1;
- }
- gain_cache = powf(scale, -t) * s;
- }
- }
- coup->gain[c][idx] = gain_cache;
- }
- }
- }
- }
- }
- return 0;
-}
-
-/**
- * Parse whether channels are to be excluded from Dynamic Range Compression; reference: table 4.53.
- *
- * @return Returns number of bytes consumed.
- */
-static int decode_drc_channel_exclusions(DynamicRangeControl *che_drc,
- GetBitContext *gb)
-{
- int i;
- int num_excl_chan = 0;
-
- do {
- for (i = 0; i < 7; i++)
- che_drc->exclude_mask[num_excl_chan++] = get_bits1(gb);
- } while (num_excl_chan < MAX_CHANNELS - 7 && get_bits1(gb));
-
- return num_excl_chan / 7;
-}
-
-/**
- * Decode dynamic range information; reference: table 4.52.
- *
- * @return Returns number of bytes consumed.
- */
-static int decode_dynamic_range(DynamicRangeControl *che_drc,
- GetBitContext *gb)
-{
- int n = 1;
- int drc_num_bands = 1;
- int i;
-
- /* pce_tag_present? */
- if (get_bits1(gb)) {
- che_drc->pce_instance_tag = get_bits(gb, 4);
- skip_bits(gb, 4); // tag_reserved_bits
- n++;
- }
-
- /* excluded_chns_present? */
- if (get_bits1(gb)) {
- n += decode_drc_channel_exclusions(che_drc, gb);
- }
-
- /* drc_bands_present? */
- if (get_bits1(gb)) {
- che_drc->band_incr = get_bits(gb, 4);
- che_drc->interpolation_scheme = get_bits(gb, 4);
- n++;
- drc_num_bands += che_drc->band_incr;
- for (i = 0; i < drc_num_bands; i++) {
- che_drc->band_top[i] = get_bits(gb, 8);
- n++;
- }
- }
-
- /* prog_ref_level_present? */
- if (get_bits1(gb)) {
- che_drc->prog_ref_level = get_bits(gb, 7);
- skip_bits1(gb); // prog_ref_level_reserved_bits
- n++;
- }
-
- for (i = 0; i < drc_num_bands; i++) {
- che_drc->dyn_rng_sgn[i] = get_bits1(gb);
- che_drc->dyn_rng_ctl[i] = get_bits(gb, 7);
- n++;
- }
-
- return n;
-}
-
-static int decode_fill(AACContext *ac, GetBitContext *gb, int len) {
- uint8_t buf[256];
- int i, major, minor;
-
- if (len < 13+7*8)
- goto unknown;
-
- get_bits(gb, 13); len -= 13;
-
- for(i=0; i+1<sizeof(buf) && len>=8; i++, len-=8)
- buf[i] = get_bits(gb, 8);
-
- buf[i] = 0;
- if (ac->avctx->debug & FF_DEBUG_PICT_INFO)
- av_log(ac->avctx, AV_LOG_DEBUG, "FILL:%s\n", buf);
-
- if (sscanf(buf, "libfaac %d.%d", &major, &minor) == 2){
- ac->avctx->internal->skip_samples = 1024;
- }
-
-unknown:
- skip_bits_long(gb, len);
-
- return 0;
-}
-
-/**
- * Decode extension data (incomplete); reference: table 4.51.
- *
- * @param cnt length of TYPE_FIL syntactic element in bytes
- *
- * @return Returns number of bytes consumed
- */
-static int decode_extension_payload(AACContext *ac, GetBitContext *gb, int cnt,
- ChannelElement *che, enum RawDataBlockType elem_type)
-{
- int crc_flag = 0;
- int res = cnt;
- int type = get_bits(gb, 4);
-
- if (ac->avctx->debug & FF_DEBUG_STARTCODE)
- av_log(ac->avctx, AV_LOG_DEBUG, "extension type: %d len:%d\n", type, cnt);
-
- switch (type) { // extension type
- case EXT_SBR_DATA_CRC:
- crc_flag++;
- case EXT_SBR_DATA:
- if (!che) {
- av_log(ac->avctx, AV_LOG_ERROR, "SBR was found before the first channel element.\n");
- return res;
- } else if (!ac->oc[1].m4ac.sbr) {
- av_log(ac->avctx, AV_LOG_ERROR, "SBR signaled to be not-present but was found in the bitstream.\n");
- skip_bits_long(gb, 8 * cnt - 4);
- return res;
- } else if (ac->oc[1].m4ac.sbr == -1 && ac->oc[1].status == OC_LOCKED) {
- av_log(ac->avctx, AV_LOG_ERROR, "Implicit SBR was found with a first occurrence after the first frame.\n");
- skip_bits_long(gb, 8 * cnt - 4);
- return res;
- } else if (ac->oc[1].m4ac.ps == -1 && ac->oc[1].status < OC_LOCKED && ac->avctx->channels == 1) {
- ac->oc[1].m4ac.sbr = 1;
- ac->oc[1].m4ac.ps = 1;
- ac->avctx->profile = FF_PROFILE_AAC_HE_V2;
- output_configure(ac, ac->oc[1].layout_map, ac->oc[1].layout_map_tags,
- ac->oc[1].status, 1);
- } else {
- ac->oc[1].m4ac.sbr = 1;
- ac->avctx->profile = FF_PROFILE_AAC_HE;
- }
- res = ff_decode_sbr_extension(ac, &che->sbr, gb, crc_flag, cnt, elem_type);
- break;
- case EXT_DYNAMIC_RANGE:
- res = decode_dynamic_range(&ac->che_drc, gb);
- break;
- case EXT_FILL:
- decode_fill(ac, gb, 8 * cnt - 4);
- break;
- case EXT_FILL_DATA:
- case EXT_DATA_ELEMENT:
- default:
- skip_bits_long(gb, 8 * cnt - 4);
- break;
- };
- return res;
-}
-
-/**
- * Decode Temporal Noise Shaping filter coefficients and apply all-pole filters; reference: 4.6.9.3.
- *
- * @param decode 1 if tool is used normally, 0 if tool is used in LTP.
- * @param coef spectral coefficients
- */
-static void apply_tns(float coef[1024], TemporalNoiseShaping *tns,
- IndividualChannelStream *ics, int decode)
-{
- const int mmm = FFMIN(ics->tns_max_bands, ics->max_sfb);
- int w, filt, m, i;
- int bottom, top, order, start, end, size, inc;
- float lpc[TNS_MAX_ORDER];
- float tmp[TNS_MAX_ORDER+1];
-
- for (w = 0; w < ics->num_windows; w++) {
- bottom = ics->num_swb;
- for (filt = 0; filt < tns->n_filt[w]; filt++) {
- top = bottom;
- bottom = FFMAX(0, top - tns->length[w][filt]);
- order = tns->order[w][filt];
- if (order == 0)
- continue;
-
- // tns_decode_coef
- compute_lpc_coefs(tns->coef[w][filt], order, lpc, 0, 0, 0);
-
- start = ics->swb_offset[FFMIN(bottom, mmm)];
- end = ics->swb_offset[FFMIN( top, mmm)];
- if ((size = end - start) <= 0)
- continue;
- if (tns->direction[w][filt]) {
- inc = -1;
- start = end - 1;
- } else {
- inc = 1;
- }
- start += w * 128;
-
- if (decode) {
- // ar filter
- for (m = 0; m < size; m++, start += inc)
- for (i = 1; i <= FFMIN(m, order); i++)
- coef[start] -= coef[start - i * inc] * lpc[i - 1];
- } else {
- // ma filter
- for (m = 0; m < size; m++, start += inc) {
- tmp[0] = coef[start];
- for (i = 1; i <= FFMIN(m, order); i++)
- coef[start] += tmp[i] * lpc[i - 1];
- for (i = order; i > 0; i--)
- tmp[i] = tmp[i - 1];
- }
- }
- }
- }
-}
-
-/**
- * Apply windowing and MDCT to obtain the spectral
- * coefficient from the predicted sample by LTP.
- */
-static void windowing_and_mdct_ltp(AACContext *ac, float *out,
- float *in, IndividualChannelStream *ics)
-{
- const float *lwindow = ics->use_kb_window[0] ? ff_aac_kbd_long_1024 : ff_sine_1024;
- const float *swindow = ics->use_kb_window[0] ? ff_aac_kbd_short_128 : ff_sine_128;
- const float *lwindow_prev = ics->use_kb_window[1] ? ff_aac_kbd_long_1024 : ff_sine_1024;
- const float *swindow_prev = ics->use_kb_window[1] ? ff_aac_kbd_short_128 : ff_sine_128;
-
- if (ics->window_sequence[0] != LONG_STOP_SEQUENCE) {
- ac->fdsp->vector_fmul(in, in, lwindow_prev, 1024);
- } else {
- memset(in, 0, 448 * sizeof(float));
- ac->fdsp->vector_fmul(in + 448, in + 448, swindow_prev, 128);
- }
- if (ics->window_sequence[0] != LONG_START_SEQUENCE) {
- ac->fdsp->vector_fmul_reverse(in + 1024, in + 1024, lwindow, 1024);
- } else {
- ac->fdsp->vector_fmul_reverse(in + 1024 + 448, in + 1024 + 448, swindow, 128);
- memset(in + 1024 + 576, 0, 448 * sizeof(float));
- }
- ac->mdct_ltp.mdct_calc(&ac->mdct_ltp, out, in);
-}
-
-/**
- * Apply the long term prediction
- */
-static void apply_ltp(AACContext *ac, SingleChannelElement *sce)
-{
- const LongTermPrediction *ltp = &sce->ics.ltp;
- const uint16_t *offsets = sce->ics.swb_offset;
- int i, sfb;
-
- if (sce->ics.window_sequence[0] != EIGHT_SHORT_SEQUENCE) {
- float *predTime = sce->ret;
- float *predFreq = ac->buf_mdct;
- int16_t num_samples = 2048;
-
- if (ltp->lag < 1024)
- num_samples = ltp->lag + 1024;
- for (i = 0; i < num_samples; i++)
- predTime[i] = sce->ltp_state[i + 2048 - ltp->lag] * ltp->coef;
- memset(&predTime[i], 0, (2048 - i) * sizeof(float));
-
- ac->windowing_and_mdct_ltp(ac, predFreq, predTime, &sce->ics);
-
- if (sce->tns.present)
- ac->apply_tns(predFreq, &sce->tns, &sce->ics, 0);
-
- for (sfb = 0; sfb < FFMIN(sce->ics.max_sfb, MAX_LTP_LONG_SFB); sfb++)
- if (ltp->used[sfb])
- for (i = offsets[sfb]; i < offsets[sfb + 1]; i++)
- sce->coeffs[i] += predFreq[i];
- }
-}
-
-/**
- * Update the LTP buffer for next frame
- */
-static void update_ltp(AACContext *ac, SingleChannelElement *sce)
-{
- IndividualChannelStream *ics = &sce->ics;
- float *saved = sce->saved;
- float *saved_ltp = sce->coeffs;
- const float *lwindow = ics->use_kb_window[0] ? ff_aac_kbd_long_1024 : ff_sine_1024;
- const float *swindow = ics->use_kb_window[0] ? ff_aac_kbd_short_128 : ff_sine_128;
- int i;
-
- if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) {
- memcpy(saved_ltp, saved, 512 * sizeof(float));
- memset(saved_ltp + 576, 0, 448 * sizeof(float));
- ac->fdsp->vector_fmul_reverse(saved_ltp + 448, ac->buf_mdct + 960, &swindow[64], 64);
- for (i = 0; i < 64; i++)
- saved_ltp[i + 512] = ac->buf_mdct[1023 - i] * swindow[63 - i];
- } else if (ics->window_sequence[0] == LONG_START_SEQUENCE) {
- memcpy(saved_ltp, ac->buf_mdct + 512, 448 * sizeof(float));
- memset(saved_ltp + 576, 0, 448 * sizeof(float));
- ac->fdsp->vector_fmul_reverse(saved_ltp + 448, ac->buf_mdct + 960, &swindow[64], 64);
- for (i = 0; i < 64; i++)
- saved_ltp[i + 512] = ac->buf_mdct[1023 - i] * swindow[63 - i];
- } else { // LONG_STOP or ONLY_LONG
- ac->fdsp->vector_fmul_reverse(saved_ltp, ac->buf_mdct + 512, &lwindow[512], 512);
- for (i = 0; i < 512; i++)
- saved_ltp[i + 512] = ac->buf_mdct[1023 - i] * lwindow[511 - i];
- }
-
- memcpy(sce->ltp_state, sce->ltp_state+1024, 1024 * sizeof(*sce->ltp_state));
- memcpy(sce->ltp_state+1024, sce->ret, 1024 * sizeof(*sce->ltp_state));
- memcpy(sce->ltp_state+2048, saved_ltp, 1024 * sizeof(*sce->ltp_state));
-}
-
-/**
- * Conduct IMDCT and windowing.
- */
-static void imdct_and_windowing(AACContext *ac, SingleChannelElement *sce)
-{
- IndividualChannelStream *ics = &sce->ics;
- float *in = sce->coeffs;
- float *out = sce->ret;
- float *saved = sce->saved;
- const float *swindow = ics->use_kb_window[0] ? ff_aac_kbd_short_128 : ff_sine_128;
- const float *lwindow_prev = ics->use_kb_window[1] ? ff_aac_kbd_long_1024 : ff_sine_1024;
- const float *swindow_prev = ics->use_kb_window[1] ? ff_aac_kbd_short_128 : ff_sine_128;
- float *buf = ac->buf_mdct;
- float *temp = ac->temp;
- int i;
-
- // imdct
- if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) {
- for (i = 0; i < 1024; i += 128)
- ac->mdct_small.imdct_half(&ac->mdct_small, buf + i, in + i);
- } else
- ac->mdct.imdct_half(&ac->mdct, buf, in);
-
- /* window overlapping
- * NOTE: To simplify the overlapping code, all 'meaningless' short to long
- * and long to short transitions are considered to be short to short
- * transitions. This leaves just two cases (long to long and short to short)
- * with a little special sauce for EIGHT_SHORT_SEQUENCE.
- */
- if ((ics->window_sequence[1] == ONLY_LONG_SEQUENCE || ics->window_sequence[1] == LONG_STOP_SEQUENCE) &&
- (ics->window_sequence[0] == ONLY_LONG_SEQUENCE || ics->window_sequence[0] == LONG_START_SEQUENCE)) {
- ac->fdsp->vector_fmul_window( out, saved, buf, lwindow_prev, 512);
- } else {
- memcpy( out, saved, 448 * sizeof(float));
-
- if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) {
- ac->fdsp->vector_fmul_window(out + 448 + 0*128, saved + 448, buf + 0*128, swindow_prev, 64);
- ac->fdsp->vector_fmul_window(out + 448 + 1*128, buf + 0*128 + 64, buf + 1*128, swindow, 64);
- ac->fdsp->vector_fmul_window(out + 448 + 2*128, buf + 1*128 + 64, buf + 2*128, swindow, 64);
- ac->fdsp->vector_fmul_window(out + 448 + 3*128, buf + 2*128 + 64, buf + 3*128, swindow, 64);
- ac->fdsp->vector_fmul_window(temp, buf + 3*128 + 64, buf + 4*128, swindow, 64);
- memcpy( out + 448 + 4*128, temp, 64 * sizeof(float));
- } else {
- ac->fdsp->vector_fmul_window(out + 448, saved + 448, buf, swindow_prev, 64);
- memcpy( out + 576, buf + 64, 448 * sizeof(float));
- }
- }
-
- // buffer update
- if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) {
- memcpy( saved, temp + 64, 64 * sizeof(float));
- ac->fdsp->vector_fmul_window(saved + 64, buf + 4*128 + 64, buf + 5*128, swindow, 64);
- ac->fdsp->vector_fmul_window(saved + 192, buf + 5*128 + 64, buf + 6*128, swindow, 64);
- ac->fdsp->vector_fmul_window(saved + 320, buf + 6*128 + 64, buf + 7*128, swindow, 64);
- memcpy( saved + 448, buf + 7*128 + 64, 64 * sizeof(float));
- } else if (ics->window_sequence[0] == LONG_START_SEQUENCE) {
- memcpy( saved, buf + 512, 448 * sizeof(float));
- memcpy( saved + 448, buf + 7*128 + 64, 64 * sizeof(float));
- } else { // LONG_STOP or ONLY_LONG
- memcpy( saved, buf + 512, 512 * sizeof(float));
- }
-}
-
-static void imdct_and_windowing_ld(AACContext *ac, SingleChannelElement *sce)
-{
- IndividualChannelStream *ics = &sce->ics;
- float *in = sce->coeffs;
- float *out = sce->ret;
- float *saved = sce->saved;
- float *buf = ac->buf_mdct;
-
- // imdct
- ac->mdct.imdct_half(&ac->mdct_ld, buf, in);
-
- // window overlapping
- if (ics->use_kb_window[1]) {
- // AAC LD uses a low overlap sine window instead of a KBD window
- memcpy(out, saved, 192 * sizeof(float));
- ac->fdsp->vector_fmul_window(out + 192, saved + 192, buf, ff_sine_128, 64);
- memcpy( out + 320, buf + 64, 192 * sizeof(float));
- } else {
- ac->fdsp->vector_fmul_window(out, saved, buf, ff_sine_512, 256);
- }
-
- // buffer update
- memcpy(saved, buf + 256, 256 * sizeof(float));
-}
-
-static void imdct_and_windowing_eld(AACContext *ac, SingleChannelElement *sce)
-{
- float *in = sce->coeffs;
- float *out = sce->ret;
- float *saved = sce->saved;
- float *buf = ac->buf_mdct;
- int i;
- const int n = ac->oc[1].m4ac.frame_length_short ? 480 : 512;
- const int n2 = n >> 1;
- const int n4 = n >> 2;
- const float *const window = n == 480 ? ff_aac_eld_window_480 :
- ff_aac_eld_window_512;
-
- // Inverse transform, mapped to the conventional IMDCT by
- // Chivukula, R.K.; Reznik, Y.A.; Devarajan, V.,
- // "Efficient algorithms for MPEG-4 AAC-ELD, AAC-LD and AAC-LC filterbanks,"
- // International Conference on Audio, Language and Image Processing, ICALIP 2008.
- // URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=4590245&isnumber=4589950
- for (i = 0; i < n2; i+=2) {
- float temp;
- temp = in[i ]; in[i ] = -in[n - 1 - i]; in[n - 1 - i] = temp;
- temp = -in[i + 1]; in[i + 1] = in[n - 2 - i]; in[n - 2 - i] = temp;
- }
- if (n == 480)
- ac->mdct480->imdct_half(ac->mdct480, buf, in, 1, -1.f/(16*1024*960));
- else
- ac->mdct.imdct_half(&ac->mdct_ld, buf, in);
- for (i = 0; i < n; i+=2) {
- buf[i] = -buf[i];
- }
- // Like with the regular IMDCT at this point we still have the middle half
- // of a transform but with even symmetry on the left and odd symmetry on
- // the right
-
- // window overlapping
- // The spec says to use samples [0..511] but the reference decoder uses
- // samples [128..639].
- for (i = n4; i < n2; i ++) {
- out[i - n4] = buf[n2 - 1 - i] * window[i - n4] +
- saved[ i + n2] * window[i + n - n4] +
- -saved[ n + n2 - 1 - i] * window[i + 2*n - n4] +
- -saved[2*n + n2 + i] * window[i + 3*n - n4];
- }
- for (i = 0; i < n2; i ++) {
- out[n4 + i] = buf[i] * window[i + n2 - n4] +
- -saved[ n - 1 - i] * window[i + n2 + n - n4] +
- -saved[ n + i] * window[i + n2 + 2*n - n4] +
- saved[2*n + n - 1 - i] * window[i + n2 + 3*n - n4];
- }
- for (i = 0; i < n4; i ++) {
- out[n2 + n4 + i] = buf[ i + n2] * window[i + n - n4] +
- -saved[ n2 - 1 - i] * window[i + 2*n - n4] +
- -saved[ n + n2 + i] * window[i + 3*n - n4];
- }
-
- // buffer update
- memmove(saved + n, saved, 2 * n * sizeof(float));
- memcpy( saved, buf, n * sizeof(float));
-}
-
-/**
* Apply dependent channel coupling (applied before IMDCT).
*
* @param index index into coupling gain array
@@ -2724,506 +252,7 @@ static void apply_independent_coupling(AACContext *ac,
dest[i] += gain * src[i];
}
-/**
- * channel coupling transformation interface
- *
- * @param apply_coupling_method pointer to (in)dependent coupling function
- */
-static void apply_channel_coupling(AACContext *ac, ChannelElement *cc,
- enum RawDataBlockType type, int elem_id,
- enum CouplingPoint coupling_point,
- void (*apply_coupling_method)(AACContext *ac, SingleChannelElement *target, ChannelElement *cce, int index))
-{
- int i, c;
-
- for (i = 0; i < MAX_ELEM_ID; i++) {
- ChannelElement *cce = ac->che[TYPE_CCE][i];
- int index = 0;
-
- if (cce && cce->coup.coupling_point == coupling_point) {
- ChannelCoupling *coup = &cce->coup;
-
- for (c = 0; c <= coup->num_coupled; c++) {
- if (coup->type[c] == type && coup->id_select[c] == elem_id) {
- if (coup->ch_select[c] != 1) {
- apply_coupling_method(ac, &cc->ch[0], cce, index);
- if (coup->ch_select[c] != 0)
- index++;
- }
- if (coup->ch_select[c] != 2)
- apply_coupling_method(ac, &cc->ch[1], cce, index++);
- } else
- index += 1 + (coup->ch_select[c] == 3);
- }
- }
- }
-}
-
-/**
- * Convert spectral data to float samples, applying all supported tools as appropriate.
- */
-static void spectral_to_sample(AACContext *ac)
-{
- int i, type;
- void (*imdct_and_window)(AACContext *ac, SingleChannelElement *sce);
- switch (ac->oc[1].m4ac.object_type) {
- case AOT_ER_AAC_LD:
- imdct_and_window = imdct_and_windowing_ld;
- break;
- case AOT_ER_AAC_ELD:
- imdct_and_window = imdct_and_windowing_eld;
- break;
- default:
- imdct_and_window = ac->imdct_and_windowing;
- }
- for (type = 3; type >= 0; type--) {
- for (i = 0; i < MAX_ELEM_ID; i++) {
- ChannelElement *che = ac->che[type][i];
- if (che && che->present) {
- if (type <= TYPE_CPE)
- apply_channel_coupling(ac, che, type, i, BEFORE_TNS, apply_dependent_coupling);
- if (ac->oc[1].m4ac.object_type == AOT_AAC_LTP) {
- if (che->ch[0].ics.predictor_present) {
- if (che->ch[0].ics.ltp.present)
- ac->apply_ltp(ac, &che->ch[0]);
- if (che->ch[1].ics.ltp.present && type == TYPE_CPE)
- ac->apply_ltp(ac, &che->ch[1]);
- }
- }
- if (che->ch[0].tns.present)
- ac->apply_tns(che->ch[0].coeffs, &che->ch[0].tns, &che->ch[0].ics, 1);
- if (che->ch[1].tns.present)
- ac->apply_tns(che->ch[1].coeffs, &che->ch[1].tns, &che->ch[1].ics, 1);
- if (type <= TYPE_CPE)
- apply_channel_coupling(ac, che, type, i, BETWEEN_TNS_AND_IMDCT, apply_dependent_coupling);
- if (type != TYPE_CCE || che->coup.coupling_point == AFTER_IMDCT) {
- imdct_and_window(ac, &che->ch[0]);
- if (ac->oc[1].m4ac.object_type == AOT_AAC_LTP)
- ac->update_ltp(ac, &che->ch[0]);
- if (type == TYPE_CPE) {
- imdct_and_window(ac, &che->ch[1]);
- if (ac->oc[1].m4ac.object_type == AOT_AAC_LTP)
- ac->update_ltp(ac, &che->ch[1]);
- }
- if (ac->oc[1].m4ac.sbr > 0) {
- ff_sbr_apply(ac, &che->sbr, type, che->ch[0].ret, che->ch[1].ret);
- }
- }
- if (type <= TYPE_CCE)
- apply_channel_coupling(ac, che, type, i, AFTER_IMDCT, apply_independent_coupling);
- che->present = 0;
- } else if (che) {
- av_log(ac->avctx, AV_LOG_VERBOSE, "ChannelElement %d.%d missing \n", type, i);
- }
- }
- }
-}
-
-static int parse_adts_frame_header(AACContext *ac, GetBitContext *gb)
-{
- int size;
- AACADTSHeaderInfo hdr_info;
- uint8_t layout_map[MAX_ELEM_ID*4][3];
- int layout_map_tags, ret;
-
- size = avpriv_aac_parse_header(gb, &hdr_info);
- if (size > 0) {
- if (!ac->warned_num_aac_frames && hdr_info.num_aac_frames != 1) {
- // This is 2 for "VLB " audio in NSV files.
- // See samples/nsv/vlb_audio.
- avpriv_report_missing_feature(ac->avctx,
- "More than one AAC RDB per ADTS frame");
- ac->warned_num_aac_frames = 1;
- }
- push_output_configuration(ac);
- if (hdr_info.chan_config) {
- ac->oc[1].m4ac.chan_config = hdr_info.chan_config;
- if ((ret = set_default_channel_config(ac->avctx,
- layout_map,
- &layout_map_tags,
- hdr_info.chan_config)) < 0)
- return ret;
- if ((ret = output_configure(ac, layout_map, layout_map_tags,
- FFMAX(ac->oc[1].status,
- OC_TRIAL_FRAME), 0)) < 0)
- return ret;
- } else {
- ac->oc[1].m4ac.chan_config = 0;
- /**
- * dual mono frames in Japanese DTV can have chan_config 0
- * WITHOUT specifying PCE.
- * thus, set dual mono as default.
- */
- if (ac->dmono_mode && ac->oc[0].status == OC_NONE) {
- layout_map_tags = 2;
- layout_map[0][0] = layout_map[1][0] = TYPE_SCE;
- layout_map[0][2] = layout_map[1][2] = AAC_CHANNEL_FRONT;
- layout_map[0][1] = 0;
- layout_map[1][1] = 1;
- if (output_configure(ac, layout_map, layout_map_tags,
- OC_TRIAL_FRAME, 0))
- return -7;
- }
- }
- ac->oc[1].m4ac.sample_rate = hdr_info.sample_rate;
- ac->oc[1].m4ac.sampling_index = hdr_info.sampling_index;
- ac->oc[1].m4ac.object_type = hdr_info.object_type;
- ac->oc[1].m4ac.frame_length_short = 0;
- if (ac->oc[0].status != OC_LOCKED ||
- ac->oc[0].m4ac.chan_config != hdr_info.chan_config ||
- ac->oc[0].m4ac.sample_rate != hdr_info.sample_rate) {
- ac->oc[1].m4ac.sbr = -1;
- ac->oc[1].m4ac.ps = -1;
- }
- if (!hdr_info.crc_absent)
- skip_bits(gb, 16);
- }
- return size;
-}
-
-static int aac_decode_er_frame(AVCodecContext *avctx, void *data,
- int *got_frame_ptr, GetBitContext *gb)
-{
- AACContext *ac = avctx->priv_data;
- const MPEG4AudioConfig *const m4ac = &ac->oc[1].m4ac;
- ChannelElement *che;
- int err, i;
- int samples = m4ac->frame_length_short ? 960 : 1024;
- int chan_config = m4ac->chan_config;
- int aot = m4ac->object_type;
-
- if (aot == AOT_ER_AAC_LD || aot == AOT_ER_AAC_ELD)
- samples >>= 1;
-
- ac->frame = data;
-
- if ((err = frame_configure_elements(avctx)) < 0)
- return err;
-
- // The FF_PROFILE_AAC_* defines are all object_type - 1
- // This may lead to an undefined profile being signaled
- ac->avctx->profile = aot - 1;
-
- ac->tags_mapped = 0;
-
- if (chan_config < 0 || (chan_config >= 8 && chan_config < 11) || chan_config >= 13) {
- avpriv_request_sample(avctx, "Unknown ER channel configuration %d",
- chan_config);
- return AVERROR_INVALIDDATA;
- }
- for (i = 0; i < tags_per_config[chan_config]; i++) {
- const int elem_type = aac_channel_layout_map[chan_config-1][i][0];
- const int elem_id = aac_channel_layout_map[chan_config-1][i][1];
- if (!(che=get_che(ac, elem_type, elem_id))) {
- av_log(ac->avctx, AV_LOG_ERROR,
- "channel element %d.%d is not allocated\n",
- elem_type, elem_id);
- return AVERROR_INVALIDDATA;
- }
- che->present = 1;
- if (aot != AOT_ER_AAC_ELD)
- skip_bits(gb, 4);
- switch (elem_type) {
- case TYPE_SCE:
- err = decode_ics(ac, &che->ch[0], gb, 0, 0);
- break;
- case TYPE_CPE:
- err = decode_cpe(ac, gb, che);
- break;
- case TYPE_LFE:
- err = decode_ics(ac, &che->ch[0], gb, 0, 0);
- break;
- }
- if (err < 0)
- return err;
- }
-
- spectral_to_sample(ac);
-
- ac->frame->nb_samples = samples;
- ac->frame->sample_rate = avctx->sample_rate;
- *got_frame_ptr = 1;
-
- skip_bits_long(gb, get_bits_left(gb));
- return 0;
-}
-
-static int aac_decode_frame_int(AVCodecContext *avctx, void *data,
- int *got_frame_ptr, GetBitContext *gb, AVPacket *avpkt)
-{
- AACContext *ac = avctx->priv_data;
- ChannelElement *che = NULL, *che_prev = NULL;
- enum RawDataBlockType elem_type, elem_type_prev = TYPE_END;
- int err, elem_id;
- int samples = 0, multiplier, audio_found = 0, pce_found = 0;
- int is_dmono, sce_count = 0;
-
- ac->frame = data;
-
- if (show_bits(gb, 12) == 0xfff) {
- if ((err = parse_adts_frame_header(ac, gb)) < 0) {
- av_log(avctx, AV_LOG_ERROR, "Error decoding AAC frame header.\n");
- goto fail;
- }
- if (ac->oc[1].m4ac.sampling_index > 12) {
- av_log(ac->avctx, AV_LOG_ERROR, "invalid sampling rate index %d\n", ac->oc[1].m4ac.sampling_index);
- err = AVERROR_INVALIDDATA;
- goto fail;
- }
- }
-
- if ((err = frame_configure_elements(avctx)) < 0)
- goto fail;
-
- // The FF_PROFILE_AAC_* defines are all object_type - 1
- // This may lead to an undefined profile being signaled
- ac->avctx->profile = ac->oc[1].m4ac.object_type - 1;
-
- ac->tags_mapped = 0;
- // parse
- while ((elem_type = get_bits(gb, 3)) != TYPE_END) {
- elem_id = get_bits(gb, 4);
-
- if (avctx->debug & FF_DEBUG_STARTCODE)
- av_log(avctx, AV_LOG_DEBUG, "Elem type:%x id:%x\n", elem_type, elem_id);
-
- if (!avctx->channels && elem_type != TYPE_PCE) {
- err = AVERROR_INVALIDDATA;
- goto fail;
- }
-
- if (elem_type < TYPE_DSE) {
- if (!(che=get_che(ac, elem_type, elem_id))) {
- av_log(ac->avctx, AV_LOG_ERROR, "channel element %d.%d is not allocated\n",
- elem_type, elem_id);
- err = AVERROR_INVALIDDATA;
- goto fail;
- }
- samples = 1024;
- che->present = 1;
- }
-
- switch (elem_type) {
-
- case TYPE_SCE:
- err = decode_ics(ac, &che->ch[0], gb, 0, 0);
- audio_found = 1;
- sce_count++;
- break;
-
- case TYPE_CPE:
- err = decode_cpe(ac, gb, che);
- audio_found = 1;
- break;
-
- case TYPE_CCE:
- err = decode_cce(ac, gb, che);
- break;
-
- case TYPE_LFE:
- err = decode_ics(ac, &che->ch[0], gb, 0, 0);
- audio_found = 1;
- break;
-
- case TYPE_DSE:
- err = skip_data_stream_element(ac, gb);
- break;
-
- case TYPE_PCE: {
- uint8_t layout_map[MAX_ELEM_ID*4][3];
- int tags;
- push_output_configuration(ac);
- tags = decode_pce(avctx, &ac->oc[1].m4ac, layout_map, gb);
- if (tags < 0) {
- err = tags;
- break;
- }
- if (pce_found) {
- av_log(avctx, AV_LOG_ERROR,
- "Not evaluating a further program_config_element as this construct is dubious at best.\n");
- } else {
- err = output_configure(ac, layout_map, tags, OC_TRIAL_PCE, 1);
- if (!err)
- ac->oc[1].m4ac.chan_config = 0;
- pce_found = 1;
- }
- break;
- }
-
- case TYPE_FIL:
- if (elem_id == 15)
- elem_id += get_bits(gb, 8) - 1;
- if (get_bits_left(gb) < 8 * elem_id) {
- av_log(avctx, AV_LOG_ERROR, "TYPE_FIL: "overread_err);
- err = AVERROR_INVALIDDATA;
- goto fail;
- }
- while (elem_id > 0)
- elem_id -= decode_extension_payload(ac, gb, elem_id, che_prev, elem_type_prev);
- err = 0; /* FIXME */
- break;
-
- default:
- err = AVERROR_BUG; /* should not happen, but keeps compiler happy */
- break;
- }
-
- che_prev = che;
- elem_type_prev = elem_type;
-
- if (err)
- goto fail;
-
- if (get_bits_left(gb) < 3) {
- av_log(avctx, AV_LOG_ERROR, overread_err);
- err = AVERROR_INVALIDDATA;
- goto fail;
- }
- }
-
- if (!avctx->channels) {
- *got_frame_ptr = 0;
- return 0;
- }
-
- spectral_to_sample(ac);
-
- multiplier = (ac->oc[1].m4ac.sbr == 1) ? ac->oc[1].m4ac.ext_sample_rate > ac->oc[1].m4ac.sample_rate : 0;
- samples <<= multiplier;
-
- if (ac->oc[1].status && audio_found) {
- avctx->sample_rate = ac->oc[1].m4ac.sample_rate << multiplier;
- avctx->frame_size = samples;
- ac->oc[1].status = OC_LOCKED;
- }
-
- if (multiplier) {
- int side_size;
- const uint8_t *side = av_packet_get_side_data(avpkt, AV_PKT_DATA_SKIP_SAMPLES, &side_size);
- if (side && side_size>=4)
- AV_WL32(side, 2*AV_RL32(side));
- }
-
- if (!ac->frame->data[0] && samples) {
- av_log(avctx, AV_LOG_ERROR, "no frame data found\n");
- err = AVERROR_INVALIDDATA;
- goto fail;
- }
-
- if (samples) {
- ac->frame->nb_samples = samples;
- ac->frame->sample_rate = avctx->sample_rate;
- } else
- av_frame_unref(ac->frame);
- *got_frame_ptr = !!samples;
-
- /* for dual-mono audio (SCE + SCE) */
- is_dmono = ac->dmono_mode && sce_count == 2 &&
- ac->oc[1].channel_layout == (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT);
- if (is_dmono) {
- if (ac->dmono_mode == 1)
- ((AVFrame *)data)->data[1] =((AVFrame *)data)->data[0];
- else if (ac->dmono_mode == 2)
- ((AVFrame *)data)->data[0] =((AVFrame *)data)->data[1];
- }
-
- return 0;
-fail:
- pop_output_configuration(ac);
- return err;
-}
-
-static int aac_decode_frame(AVCodecContext *avctx, void *data,
- int *got_frame_ptr, AVPacket *avpkt)
-{
- AACContext *ac = avctx->priv_data;
- const uint8_t *buf = avpkt->data;
- int buf_size = avpkt->size;
- GetBitContext gb;
- int buf_consumed;
- int buf_offset;
- int err;
- int new_extradata_size;
- const uint8_t *new_extradata = av_packet_get_side_data(avpkt,
- AV_PKT_DATA_NEW_EXTRADATA,
- &new_extradata_size);
- int jp_dualmono_size;
- const uint8_t *jp_dualmono = av_packet_get_side_data(avpkt,
- AV_PKT_DATA_JP_DUALMONO,
- &jp_dualmono_size);
-
- if (new_extradata && 0) {
- av_free(avctx->extradata);
- avctx->extradata = av_mallocz(new_extradata_size +
- FF_INPUT_BUFFER_PADDING_SIZE);
- if (!avctx->extradata)
- return AVERROR(ENOMEM);
- avctx->extradata_size = new_extradata_size;
- memcpy(avctx->extradata, new_extradata, new_extradata_size);
- push_output_configuration(ac);
- if (decode_audio_specific_config(ac, ac->avctx, &ac->oc[1].m4ac,
- avctx->extradata,
- avctx->extradata_size*8, 1) < 0) {
- pop_output_configuration(ac);
- return AVERROR_INVALIDDATA;
- }
- }
-
- ac->dmono_mode = 0;
- if (jp_dualmono && jp_dualmono_size > 0)
- ac->dmono_mode = 1 + *jp_dualmono;
- if (ac->force_dmono_mode >= 0)
- ac->dmono_mode = ac->force_dmono_mode;
-
- if (INT_MAX / 8 <= buf_size)
- return AVERROR_INVALIDDATA;
-
- if ((err = init_get_bits(&gb, buf, buf_size * 8)) < 0)
- return err;
-
- switch (ac->oc[1].m4ac.object_type) {
- case AOT_ER_AAC_LC:
- case AOT_ER_AAC_LTP:
- case AOT_ER_AAC_LD:
- case AOT_ER_AAC_ELD:
- err = aac_decode_er_frame(avctx, data, got_frame_ptr, &gb);
- break;
- default:
- err = aac_decode_frame_int(avctx, data, got_frame_ptr, &gb, avpkt);
- }
- if (err < 0)
- return err;
-
- buf_consumed = (get_bits_count(&gb) + 7) >> 3;
- for (buf_offset = buf_consumed; buf_offset < buf_size; buf_offset++)
- if (buf[buf_offset])
- break;
-
- return buf_size > buf_offset ? buf_consumed : buf_size;
-}
-
-static av_cold int aac_decode_close(AVCodecContext *avctx)
-{
- AACContext *ac = avctx->priv_data;
- int i, type;
-
- for (i = 0; i < MAX_ELEM_ID; i++) {
- for (type = 0; type < 4; type++) {
- if (ac->che[type][i])
- ff_aac_sbr_ctx_close(&ac->che[type][i]->sbr);
- av_freep(&ac->che[type][i]);
- }
- }
-
- ff_mdct_end(&ac->mdct);
- ff_mdct_end(&ac->mdct_small);
- ff_mdct_end(&ac->mdct_ld);
- ff_mdct_end(&ac->mdct_ltp);
- ff_imdct15_uninit(&ac->mdct480);
- av_freep(&ac->fdsp);
- return 0;
-}
-
+#include "aacdec_template.c"
#define LOAS_SYNC_WORD 0x2b7 ///< 11 bits LOAS sync word
@@ -3505,53 +534,6 @@ static av_cold int latm_decode_init(AVCodecContext *avctx)
return ret;
}
-static void aacdec_init(AACContext *c)
-{
- c->imdct_and_windowing = imdct_and_windowing;
- c->apply_ltp = apply_ltp;
- c->apply_tns = apply_tns;
- c->windowing_and_mdct_ltp = windowing_and_mdct_ltp;
- c->update_ltp = update_ltp;
-
- if(ARCH_MIPS)
- ff_aacdec_init_mips(c);
-}
-/**
- * AVOptions for Japanese DTV specific extensions (ADTS only)
- */
-#define AACDEC_FLAGS AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM
-static const AVOption options[] = {
- {"dual_mono_mode", "Select the channel to decode for dual mono",
- offsetof(AACContext, force_dmono_mode), AV_OPT_TYPE_INT, {.i64=-1}, -1, 2,
- AACDEC_FLAGS, "dual_mono_mode"},
-
- {"auto", "autoselection", 0, AV_OPT_TYPE_CONST, {.i64=-1}, INT_MIN, INT_MAX, AACDEC_FLAGS, "dual_mono_mode"},
- {"main", "Select Main/Left channel", 0, AV_OPT_TYPE_CONST, {.i64= 1}, INT_MIN, INT_MAX, AACDEC_FLAGS, "dual_mono_mode"},
- {"sub" , "Select Sub/Right channel", 0, AV_OPT_TYPE_CONST, {.i64= 2}, INT_MIN, INT_MAX, AACDEC_FLAGS, "dual_mono_mode"},
- {"both", "Select both channels", 0, AV_OPT_TYPE_CONST, {.i64= 0}, INT_MIN, INT_MAX, AACDEC_FLAGS, "dual_mono_mode"},
-
- {NULL},
-};
-
-static const AVClass aac_decoder_class = {
- .class_name = "AAC decoder",
- .item_name = av_default_item_name,
- .option = options,
- .version = LIBAVUTIL_VERSION_INT,
-};
-
-static const AVProfile profiles[] = {
- { FF_PROFILE_AAC_MAIN, "Main" },
- { FF_PROFILE_AAC_LOW, "LC" },
- { FF_PROFILE_AAC_SSR, "SSR" },
- { FF_PROFILE_AAC_LTP, "LTP" },
- { FF_PROFILE_AAC_HE, "HE-AAC" },
- { FF_PROFILE_AAC_HE_V2, "HE-AACv2" },
- { FF_PROFILE_AAC_LD, "LD" },
- { FF_PROFILE_AAC_ELD, "ELD" },
- { FF_PROFILE_UNKNOWN },
-};
-
AVCodec ff_aac_decoder = {
.name = "aac",
.long_name = NULL_IF_CONFIG_SMALL("AAC (Advanced Audio Coding)"),
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-19 20:43:15 +0000