diff options
author | Alex Converse <alex.converse@gmail.com> | 2012-02-28 10:36:29 -0800 |
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committer | Alex Converse <alex.converse@gmail.com> | 2012-02-28 21:38:15 -0800 |
commit | 2564f6e6d433ec9907dc4bf2f9e8ea252e83a635 (patch) | |
tree | c4c62d4c4674da85f2abe9b55c1a24ee51f99354 /libavcodec | |
parent | 8bc396fc0e8769a056375c1c211f389ce0e3ecc5 (diff) | |
download | ffmpeg-2564f6e6d433ec9907dc4bf2f9e8ea252e83a635.tar.gz |
aacdec: Reshuffle functions so get_che() can call set_default_channel_config() and output_configure().
Diffstat (limited to 'libavcodec')
-rw-r--r-- | libavcodec/aacdec.c | 140 |
1 files changed, 70 insertions, 70 deletions
diff --git a/libavcodec/aacdec.c b/libavcodec/aacdec.c index 811ec0bd9d..340052e0c0 100644 --- a/libavcodec/aacdec.c +++ b/libavcodec/aacdec.c @@ -114,55 +114,6 @@ static VLC vlc_spectral[11]; static const char overread_err[] = "Input buffer exhausted before END element found\n"; -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->m4ac.chan_config) { - return ac->tag_che_map[type][elem_id]; - } - // For indexed channel configurations map the channels solely based on position. - switch (ac->m4ac.chan_config) { - 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 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->m4ac.chan_config] - 1 && (type == TYPE_LFE || type == TYPE_SCE)) { - 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: - if (ac->tags_mapped == 2 && ac->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->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->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; - } -} - static int count_channels(uint8_t (*layout)[3], int tags) { int i, sum = 0; @@ -438,6 +389,76 @@ static av_cold int output_configure(AACContext *ac, } /** + * 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 av_cold int set_default_channel_config(AVCodecContext *avctx, + uint8_t (*layout_map)[3], + int *tags, + int channel_config) +{ + if (channel_config < 1 || channel_config > 7) { + av_log(avctx, AV_LOG_ERROR, "invalid default channel configuration (%d)\n", + channel_config); + return -1; + } + *tags = tags_per_config[channel_config]; + memcpy(layout_map, aac_channel_layout_map[channel_config-1], *tags * sizeof(*layout_map)); + 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->m4ac.chan_config) { + return ac->tag_che_map[type][elem_id]; + } + // For indexed channel configurations map the channels solely based on position. + switch (ac->m4ac.chan_config) { + 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 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->m4ac.chan_config] - 1 && (type == TYPE_LFE || type == TYPE_SCE)) { + 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: + if (ac->tags_mapped == 2 && ac->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->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->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 @@ -530,27 +551,6 @@ static int decode_pce(AVCodecContext *avctx, MPEG4AudioConfig *m4ac, } /** - * 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 av_cold int set_default_channel_config(AVCodecContext *avctx, - uint8_t (*layout_map)[3], - int *tags, - int channel_config) -{ - if (channel_config < 1 || channel_config > 7) { - av_log(avctx, AV_LOG_ERROR, "invalid default channel configuration (%d)\n", - channel_config); - return -1; - } - *tags = tags_per_config[channel_config]; - memcpy(layout_map, aac_channel_layout_map[channel_config-1], *tags * sizeof(*layout_map)); - return 0; -} - -/** * Decode GA "General Audio" specific configuration; reference: table 4.1. * * @param ac pointer to AACContext, may be null |