Merge remote-tracking branch 'qatar/master'

* qatar/master:
  Move id3v2 tag writing to a separate file.
  swscale: add missing colons to x86 assembly yuv2planeX.
  g722: split decoder and encoder into separate files
  cosmetics: remove extra spaces before end-of-statement semi-colons
  vorbisdec: check output buffer size before writing output
  wavpack: calculate bpp using av_get_bytes_per_sample()
  ac3enc: Set max value for mode options correctly
  lavc: move get_b_cbp() from h263.h to mpeg4videoenc.c
  mpeg12: move closed_gop from MpegEncContext to Mpeg1Context
  mpeg12: move full_pel from MpegEncContext to Mpeg1Context
  mpeg12: move Mpeg1Context from mpeg12.c to mpeg12.h
  mpegvideo: remove some unused variables from MpegEncContext.

Conflicts:
	libavcodec/mpeg12.c
	libavformat/mp3enc.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>

23 files changed, 803 insertions, 636 deletions

diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 4941b6f0b2..d90bcacb8a 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -519,8 +519,8 @@ OBJS-$(CONFIG_ADPCM_EA_R1_DECODER)        += adpcm.o
 OBJS-$(CONFIG_ADPCM_EA_R2_DECODER)        += adpcm.o
 OBJS-$(CONFIG_ADPCM_EA_R3_DECODER)        += adpcm.o
 OBJS-$(CONFIG_ADPCM_EA_XAS_DECODER)       += adpcm.o
-OBJS-$(CONFIG_ADPCM_G722_DECODER)         += g722.o
-OBJS-$(CONFIG_ADPCM_G722_ENCODER)         += g722.o
+OBJS-$(CONFIG_ADPCM_G722_DECODER)         += g722.o g722dec.o
+OBJS-$(CONFIG_ADPCM_G722_ENCODER)         += g722.o g722enc.o
 OBJS-$(CONFIG_ADPCM_G726_DECODER)         += g726.o
 OBJS-$(CONFIG_ADPCM_G726_ENCODER)         += g726.o
 OBJS-$(CONFIG_ADPCM_IMA_AMV_DECODER)      += adpcm.o adpcm_data.o
diff --git a/libavcodec/ac3enc_opts_template.c b/libavcodec/ac3enc_opts_template.c
index acb4ab477a..a5f848e200 100644
--- a/libavcodec/ac3enc_opts_template.c
+++ b/libavcodec/ac3enc_opts_template.c
@@ -45,7 +45,7 @@ static const AVOption eac3_options[] = {
 /* other metadata options */
 {"copyright", "Copyright Bit", OFFSET(copyright), AV_OPT_TYPE_INT, {.dbl = AC3ENC_OPT_NONE }, AC3ENC_OPT_NONE, 1, AC3ENC_PARAM},
 {"dialnorm", "Dialogue Level (dB)", OFFSET(dialogue_level), AV_OPT_TYPE_INT, {.dbl = -31 }, -31, -1, AC3ENC_PARAM},
-{"dsur_mode", "Dolby Surround Mode", OFFSET(dolby_surround_mode), AV_OPT_TYPE_INT, {.dbl = AC3ENC_OPT_NONE }, AC3ENC_OPT_NONE, AC3ENC_OPT_MODE_OFF, AC3ENC_PARAM, "dsur_mode"},
+{"dsur_mode", "Dolby Surround Mode", OFFSET(dolby_surround_mode), AV_OPT_TYPE_INT, {.dbl = AC3ENC_OPT_NONE }, AC3ENC_OPT_NONE, AC3ENC_OPT_MODE_ON, AC3ENC_PARAM, "dsur_mode"},
     {"notindicated", "Not Indicated (default)",    0, AV_OPT_TYPE_CONST, {.dbl = AC3ENC_OPT_NOT_INDICATED }, INT_MIN, INT_MAX, AC3ENC_PARAM, "dsur_mode"},
     {"on",           "Dolby Surround Encoded",     0, AV_OPT_TYPE_CONST, {.dbl = AC3ENC_OPT_MODE_ON       }, INT_MIN, INT_MAX, AC3ENC_PARAM, "dsur_mode"},
     {"off",          "Not Dolby Surround Encoded", 0, AV_OPT_TYPE_CONST, {.dbl = AC3ENC_OPT_MODE_OFF      }, INT_MIN, INT_MAX, AC3ENC_PARAM, "dsur_mode"},
@@ -59,11 +59,11 @@ static const AVOption eac3_options[] = {
 {"ltrt_surmixlev", "Lt/Rt Surround Mix Level", OFFSET(ltrt_surround_mix_level), AV_OPT_TYPE_FLOAT, {.dbl = -1.0 }, -1.0, 2.0, AC3ENC_PARAM},
 {"loro_cmixlev", "Lo/Ro Center Mix Level", OFFSET(loro_center_mix_level), AV_OPT_TYPE_FLOAT, {.dbl = -1.0 }, -1.0, 2.0, AC3ENC_PARAM},
 {"loro_surmixlev", "Lo/Ro Surround Mix Level", OFFSET(loro_surround_mix_level), AV_OPT_TYPE_FLOAT, {.dbl = -1.0 }, -1.0, 2.0, AC3ENC_PARAM},
-{"dsurex_mode", "Dolby Surround EX Mode", OFFSET(dolby_surround_ex_mode), AV_OPT_TYPE_INT, {.dbl = AC3ENC_OPT_NONE }, AC3ENC_OPT_NONE, AC3ENC_OPT_MODE_OFF, AC3ENC_PARAM, "dsurex_mode"},
+{"dsurex_mode", "Dolby Surround EX Mode", OFFSET(dolby_surround_ex_mode), AV_OPT_TYPE_INT, {.dbl = AC3ENC_OPT_NONE }, AC3ENC_OPT_NONE, AC3ENC_OPT_MODE_ON, AC3ENC_PARAM, "dsurex_mode"},
     {"notindicated", "Not Indicated (default)",       0, AV_OPT_TYPE_CONST, {.dbl = AC3ENC_OPT_NOT_INDICATED }, INT_MIN, INT_MAX, AC3ENC_PARAM, "dsurex_mode"},
     {"on",           "Dolby Surround EX Encoded",     0, AV_OPT_TYPE_CONST, {.dbl = AC3ENC_OPT_MODE_ON       }, INT_MIN, INT_MAX, AC3ENC_PARAM, "dsurex_mode"},
     {"off",          "Not Dolby Surround EX Encoded", 0, AV_OPT_TYPE_CONST, {.dbl = AC3ENC_OPT_MODE_OFF      }, INT_MIN, INT_MAX, AC3ENC_PARAM, "dsurex_mode"},
-{"dheadphone_mode", "Dolby Headphone Mode", OFFSET(dolby_headphone_mode), AV_OPT_TYPE_INT, {.dbl = AC3ENC_OPT_NONE }, AC3ENC_OPT_NONE, AC3ENC_OPT_MODE_OFF, AC3ENC_PARAM, "dheadphone_mode"},
+{"dheadphone_mode", "Dolby Headphone Mode", OFFSET(dolby_headphone_mode), AV_OPT_TYPE_INT, {.dbl = AC3ENC_OPT_NONE }, AC3ENC_OPT_NONE, AC3ENC_OPT_MODE_ON, AC3ENC_PARAM, "dheadphone_mode"},
     {"notindicated", "Not Indicated (default)",     0, AV_OPT_TYPE_CONST, {.dbl = AC3ENC_OPT_NOT_INDICATED }, INT_MIN, INT_MAX, AC3ENC_PARAM, "dheadphone_mode"},
     {"on",           "Dolby Headphone Encoded",     0, AV_OPT_TYPE_CONST, {.dbl = AC3ENC_OPT_MODE_ON       }, INT_MIN, INT_MAX, AC3ENC_PARAM, "dheadphone_mode"},
     {"off",          "Not Dolby Headphone Encoded", 0, AV_OPT_TYPE_CONST, {.dbl = AC3ENC_OPT_MODE_OFF      }, INT_MIN, INT_MAX, AC3ENC_PARAM, "dheadphone_mode"},
diff --git a/libavcodec/arm/asm-offsets.h b/libavcodec/arm/asm-offsets.h
index 17a540031b..5cfc5cb10c 100644
--- a/libavcodec/arm/asm-offsets.h
+++ b/libavcodec/arm/asm-offsets.h
@@ -29,11 +29,11 @@
 #endif
 
 /* MpegEncContext */
-#define Y_DC_SCALE               0xac
-#define C_DC_SCALE               0xb0
-#define AC_PRED                  0xb4
-#define BLOCK_LAST_INDEX         0xb8
-#define H263_AIC                 0xe8
-#define INTER_SCANTAB_RASTER_END 0x130
+#define Y_DC_SCALE               0xa8
+#define C_DC_SCALE               0xac
+#define AC_PRED                  0xb0
+#define BLOCK_LAST_INDEX         0xb4
+#define H263_AIC                 0xe4
+#define INTER_SCANTAB_RASTER_END 0x12c
 
 #endif /* AVCODEC_ARM_ASM_OFFSETS_H */
diff --git a/libavcodec/g722.c b/libavcodec/g722.c
index 30c6f5313c..e8e74242b8 100644
--- a/libavcodec/g722.c
+++ b/libavcodec/g722.c
@@ -36,45 +36,8 @@
  *       respectively of each byte are ignored.
  */
 
-#include "avcodec.h"
 #include "mathops.h"
-#include "get_bits.h"
-
-#define PREV_SAMPLES_BUF_SIZE 1024
-
-#define FREEZE_INTERVAL 128
-
-typedef struct {
-    int16_t prev_samples[PREV_SAMPLES_BUF_SIZE]; ///< memory of past decoded samples
-    int     prev_samples_pos;        ///< the number of values in prev_samples
-
-    /**
-     * The band[0] and band[1] correspond respectively to the lower band and higher band.
-     */
-    struct G722Band {
-        int16_t s_predictor;         ///< predictor output value
-        int32_t s_zero;              ///< previous output signal from zero predictor
-        int8_t  part_reconst_mem[2]; ///< signs of previous partially reconstructed signals
-        int16_t prev_qtzd_reconst;   ///< previous quantized reconstructed signal (internal value, using low_inv_quant4)
-        int16_t pole_mem[2];         ///< second-order pole section coefficient buffer
-        int32_t diff_mem[6];         ///< quantizer difference signal memory
-        int16_t zero_mem[6];         ///< Seventh-order zero section coefficient buffer
-        int16_t log_factor;          ///< delayed 2-logarithmic quantizer factor
-        int16_t scale_factor;        ///< delayed quantizer scale factor
-    } band[2];
-
-    struct TrellisNode {
-        struct G722Band state;
-        uint32_t ssd;
-        int path;
-    } *node_buf[2], **nodep_buf[2];
-
-    struct TrellisPath {
-        int value;
-        int prev;
-    } *paths[2];
-} G722Context;
-
+#include "g722.h"
 
 static const int8_t sign_lookup[2] = { -1, 1 };
 
@@ -85,7 +48,7 @@ static const int16_t inv_log2_table[32] = {
     3444, 3520, 3597, 3676, 3756, 3838, 3922, 4008
 };
 static const int16_t high_log_factor_step[2] = { 798, -214 };
-static const int16_t high_inv_quant[4] = { -926, -202, 926, 202 };
+const int16_t ff_g722_high_inv_quant[4] = { -926, -202, 926, 202 };
 /**
  * low_log_factor_step[index] == wl[rl42[index]]
  */
@@ -93,11 +56,11 @@ static const int16_t low_log_factor_step[16] = {
      -60, 3042, 1198, 538, 334, 172,  58, -30,
     3042, 1198,  538, 334, 172,  58, -30, -60
 };
-static const int16_t low_inv_quant4[16] = {
+const int16_t ff_g722_low_inv_quant4[16] = {
        0, -2557, -1612, -1121,  -786,  -530,  -323,  -150,
     2557,  1612,  1121,   786,   530,   323,   150,     0
 };
-static const int16_t low_inv_quant6[64] = {
+const int16_t ff_g722_low_inv_quant6[64] = {
      -17,   -17,   -17,   -17, -3101, -2738, -2376, -2088,
    -1873, -1689, -1535, -1399, -1279, -1170, -1072,  -982,
     -899,  -822,  -750,  -682,  -618,  -558,  -501,  -447,
@@ -173,10 +136,10 @@ static int inline linear_scale_factor(const int log_factor)
     return shift < 0 ? wd1 >> -shift : wd1 << shift;
 }
 
-static void update_low_predictor(struct G722Band *band, const int ilow)
+void ff_g722_update_low_predictor(struct G722Band *band, const int ilow)
 {
     do_adaptive_prediction(band,
-                           band->scale_factor * low_inv_quant4[ilow] >> 10);
+                           band->scale_factor * ff_g722_low_inv_quant4[ilow] >> 10);
 
     // quantizer adaptation
     band->log_factor   = av_clip((band->log_factor * 127 >> 7) +
@@ -184,7 +147,7 @@ static void update_low_predictor(struct G722Band *band, const int ilow)
     band->scale_factor = linear_scale_factor(band->log_factor - (8 << 11));
 }
 
-static void update_high_predictor(struct G722Band *band, const int dhigh,
+void ff_g722_update_high_predictor(struct G722Band *band, const int dhigh,
                                   const int ihigh)
 {
     do_adaptive_prediction(band, dhigh);
@@ -195,7 +158,7 @@ static void update_high_predictor(struct G722Band *band, const int dhigh,
     band->scale_factor = linear_scale_factor(band->log_factor - (10 << 11));
 }
 
-static void apply_qmf(const int16_t *prev_samples, int *xout1, int *xout2)
+void ff_g722_apply_qmf(const int16_t *prev_samples, int *xout1, int *xout2)
 {
     int i;
 
@@ -206,377 +169,3 @@ static void apply_qmf(const int16_t *prev_samples, int *xout1, int *xout2)
         MAC16(*xout1, prev_samples[2*i+1], qmf_coeffs[11-i]);
     }
 }
-
-static av_cold int g722_init(AVCodecContext * avctx)
-{
-    G722Context *c = avctx->priv_data;
-
-    if (avctx->channels != 1) {
-        av_log(avctx, AV_LOG_ERROR, "Only mono tracks are allowed.\n");
-        return AVERROR_INVALIDDATA;
-    }
-    avctx->sample_fmt = AV_SAMPLE_FMT_S16;
-
-    switch (avctx->bits_per_coded_sample) {
-    case 8:
-    case 7:
-    case 6:
-        break;
-    default:
-        av_log(avctx, AV_LOG_WARNING, "Unsupported bits_per_coded_sample [%d], "
-                                      "assuming 8\n",
-                                      avctx->bits_per_coded_sample);
-    case 0:
-        avctx->bits_per_coded_sample = 8;
-        break;
-    }
-
-    c->band[0].scale_factor = 8;
-    c->band[1].scale_factor = 2;
-    c->prev_samples_pos = 22;
-
-    if (avctx->lowres)
-        avctx->sample_rate /= 2;
-
-    if (avctx->trellis) {
-        int frontier = 1 << avctx->trellis;
-        int max_paths = frontier * FREEZE_INTERVAL;
-        int i;
-        for (i = 0; i < 2; i++) {
-            c->paths[i] = av_mallocz(max_paths * sizeof(**c->paths));
-            c->node_buf[i] = av_mallocz(2 * frontier * sizeof(**c->node_buf));
-            c->nodep_buf[i] = av_mallocz(2 * frontier * sizeof(**c->nodep_buf));
-        }
-    }
-
-    return 0;
-}
-
-static av_cold int g722_close(AVCodecContext *avctx)
-{
-    G722Context *c = avctx->priv_data;
-    int i;
-    for (i = 0; i < 2; i++) {
-        av_freep(&c->paths[i]);
-        av_freep(&c->node_buf[i]);
-        av_freep(&c->nodep_buf[i]);
-    }
-    return 0;
-}
-
-#if CONFIG_ADPCM_G722_DECODER
-static const int16_t low_inv_quant5[32] = {
-     -35,   -35, -2919, -2195, -1765, -1458, -1219, -1023,
-    -858,  -714,  -587,  -473,  -370,  -276,  -190,  -110,
-    2919,  2195,  1765,  1458,  1219,  1023,   858,   714,
-     587,   473,   370,   276,   190,   110,    35,   -35
-};
-
-static const int16_t *low_inv_quants[3] = { low_inv_quant6, low_inv_quant5,
-                                 low_inv_quant4 };
-
-static int g722_decode_frame(AVCodecContext *avctx, void *data,
-                             int *data_size, AVPacket *avpkt)
-{
-    G722Context *c = avctx->priv_data;
-    int16_t *out_buf = data;
-    int j, out_len = 0;
-    const int skip = 8 - avctx->bits_per_coded_sample;
-    const int16_t *quantizer_table = low_inv_quants[skip];
-    GetBitContext gb;
-
-    init_get_bits(&gb, avpkt->data, avpkt->size * 8);
-
-    for (j = 0; j < avpkt->size; j++) {
-        int ilow, ihigh, rlow;
-
-        ihigh = get_bits(&gb, 2);
-        ilow = get_bits(&gb, 6 - skip);
-        skip_bits(&gb, skip);
-
-        rlow = av_clip((c->band[0].scale_factor * quantizer_table[ilow] >> 10)
-                      + c->band[0].s_predictor, -16384, 16383);
-
-        update_low_predictor(&c->band[0], ilow >> (2 - skip));
-
-        if (!avctx->lowres) {
-            const int dhigh = c->band[1].scale_factor *
-                              high_inv_quant[ihigh] >> 10;
-            const int rhigh = av_clip(dhigh + c->band[1].s_predictor,
-                                      -16384, 16383);
-            int xout1, xout2;
-
-            update_high_predictor(&c->band[1], dhigh, ihigh);
-
-            c->prev_samples[c->prev_samples_pos++] = rlow + rhigh;
-            c->prev_samples[c->prev_samples_pos++] = rlow - rhigh;
-            apply_qmf(c->prev_samples + c->prev_samples_pos - 24,
-                      &xout1, &xout2);
-            out_buf[out_len++] = av_clip_int16(xout1 >> 12);
-            out_buf[out_len++] = av_clip_int16(xout2 >> 12);
-            if (c->prev_samples_pos >= PREV_SAMPLES_BUF_SIZE) {
-                memmove(c->prev_samples,
-                        c->prev_samples + c->prev_samples_pos - 22,
-                        22 * sizeof(c->prev_samples[0]));
-                c->prev_samples_pos = 22;
-            }
-        } else
-            out_buf[out_len++] = rlow;
-    }
-    *data_size = out_len << 1;
-    return avpkt->size;
-}
-
-AVCodec ff_adpcm_g722_decoder = {
-    .name           = "g722",
-    .type           = AVMEDIA_TYPE_AUDIO,
-    .id             = CODEC_ID_ADPCM_G722,
-    .priv_data_size = sizeof(G722Context),
-    .init           = g722_init,
-    .decode         = g722_decode_frame,
-    .long_name      = NULL_IF_CONFIG_SMALL("G.722 ADPCM"),
-    .max_lowres     = 1,
-};
-#endif
-
-#if CONFIG_ADPCM_G722_ENCODER
-static const int16_t low_quant[33] = {
-      35,   72,  110,  150,  190,  233,  276,  323,
-     370,  422,  473,  530,  587,  650,  714,  786,
-     858,  940, 1023, 1121, 1219, 1339, 1458, 1612,
-    1765, 1980, 2195, 2557, 2919
-};
-
-static inline void filter_samples(G722Context *c, const int16_t *samples,
-                                  int *xlow, int *xhigh)
-{
-    int xout1, xout2;
-    c->prev_samples[c->prev_samples_pos++] = samples[0];
-    c->prev_samples[c->prev_samples_pos++] = samples[1];
-    apply_qmf(c->prev_samples + c->prev_samples_pos - 24, &xout1, &xout2);
-    *xlow  = xout1 + xout2 >> 13;
-    *xhigh = xout1 - xout2 >> 13;
-    if (c->prev_samples_pos >= PREV_SAMPLES_BUF_SIZE) {
-        memmove(c->prev_samples,
-                c->prev_samples + c->prev_samples_pos - 22,
-                22 * sizeof(c->prev_samples[0]));
-        c->prev_samples_pos = 22;
-    }
-}
-
-static inline int encode_high(const struct G722Band *state, int xhigh)
-{
-    int diff = av_clip_int16(xhigh - state->s_predictor);
-    int pred = 141 * state->scale_factor >> 8;
-           /* = diff >= 0 ? (diff < pred) + 2 : diff >= -pred */
-    return ((diff ^ (diff >> (sizeof(diff)*8-1))) < pred) + 2*(diff >= 0);
-}
-
-static inline int encode_low(const struct G722Band* state, int xlow)
-{
-    int diff  = av_clip_int16(xlow - state->s_predictor);
-           /* = diff >= 0 ? diff : -(diff + 1) */
-    int limit = diff ^ (diff >> (sizeof(diff)*8-1));
-    int i = 0;
-    limit = limit + 1 << 10;
-    if (limit > low_quant[8] * state->scale_factor)
-        i = 9;
-    while (i < 29 && limit > low_quant[i] * state->scale_factor)
-        i++;
-    return (diff < 0 ? (i < 2 ? 63 : 33) : 61) - i;
-}
-
-static int g722_encode_trellis(AVCodecContext *avctx,
-                               uint8_t *dst, int buf_size, void *data)
-{
-    G722Context *c = avctx->priv_data;
-    const int16_t *samples = data;
-    int i, j, k;
-    int frontier = 1 << avctx->trellis;
-    struct TrellisNode **nodes[2];
-    struct TrellisNode **nodes_next[2];
-    int pathn[2] = {0, 0}, froze = -1;
-    struct TrellisPath *p[2];
-
-    for (i = 0; i < 2; i++) {
-        nodes[i] = c->nodep_buf[i];
-        nodes_next[i] = c->nodep_buf[i] + frontier;
-        memset(c->nodep_buf[i], 0, 2 * frontier * sizeof(*c->nodep_buf));
-        nodes[i][0] = c->node_buf[i] + frontier;
-        nodes[i][0]->ssd = 0;
-        nodes[i][0]->path = 0;
-        nodes[i][0]->state = c->band[i];
-    }
-
-    for (i = 0; i < buf_size >> 1; i++) {
-        int xlow, xhigh;
-        struct TrellisNode *next[2];
-        int heap_pos[2] = {0, 0};
-
-        for (j = 0; j < 2; j++) {
-            next[j] = c->node_buf[j] + frontier*(i & 1);
-            memset(nodes_next[j], 0, frontier * sizeof(**nodes_next));
-        }
-
-        filter_samples(c, &samples[2*i], &xlow, &xhigh);
-
-        for (j = 0; j < frontier && nodes[0][j]; j++) {
-            /* Only k >> 2 affects the future adaptive state, therefore testing
-             * small steps that don't change k >> 2 is useless, the orignal
-             * value from encode_low is better than them. Since we step k
-             * in steps of 4, make sure range is a multiple of 4, so that
-             * we don't miss the original value from encode_low. */
-            int range = j < frontier/2 ? 4 : 0;
-            struct TrellisNode *cur_node = nodes[0][j];
-
-            int ilow = encode_low(&cur_node->state, xlow);
-
-            for (k = ilow - range; k <= ilow + range && k <= 63; k += 4) {
-                int decoded, dec_diff, pos;
-                uint32_t ssd;
-                struct TrellisNode* node;
-
-                if (k < 0)
-                    continue;
-
-                decoded = av_clip((cur_node->state.scale_factor *
-                                  low_inv_quant6[k] >> 10)
-                                + cur_node->state.s_predictor, -16384, 16383);
-                dec_diff = xlow - decoded;
-
-#define STORE_NODE(index, UPDATE, VALUE)\
-                ssd = cur_node->ssd + dec_diff*dec_diff;\
-                /* Check for wraparound. Using 64 bit ssd counters would \
-                 * be simpler, but is slower on x86 32 bit. */\
-                if (ssd < cur_node->ssd)\
-                    continue;\
-                if (heap_pos[index] < frontier) {\
-                    pos = heap_pos[index]++;\
-                    assert(pathn[index] < FREEZE_INTERVAL * frontier);\
-                    node = nodes_next[index][pos] = next[index]++;\
-                    node->path = pathn[index]++;\
-                } else {\
-                    /* Try to replace one of the leaf nodes with the new \
-                     * one, but not always testing the same leaf position */\
-                    pos = (frontier>>1) + (heap_pos[index] & ((frontier>>1) - 1));\
-                    if (ssd >= nodes_next[index][pos]->ssd)\
-                        continue;\
-                    heap_pos[index]++;\
-                    node = nodes_next[index][pos];\
-                }\
-                node->ssd = ssd;\
-                node->state = cur_node->state;\
-                UPDATE;\
-                c->paths[index][node->path].value = VALUE;\
-                c->paths[index][node->path].prev = cur_node->path;\
-                /* Sift the newly inserted node up in the heap to restore \
-                 * the heap property */\
-                while (pos > 0) {\
-                    int parent = (pos - 1) >> 1;\
-                    if (nodes_next[index][parent]->ssd <= ssd)\
-                        break;\
-                    FFSWAP(struct TrellisNode*, nodes_next[index][parent],\
-                                                nodes_next[index][pos]);\
-                    pos = parent;\
-                }
-                STORE_NODE(0, update_low_predictor(&node->state, k >> 2), k);
-            }
-        }
-
-        for (j = 0; j < frontier && nodes[1][j]; j++) {
-            int ihigh;
-            struct TrellisNode *cur_node = nodes[1][j];
-
-            /* We don't try to get any initial guess for ihigh via
-             * encode_high - since there's only 4 possible values, test
-             * them all. Testing all of these gives a much, much larger
-             * gain than testing a larger range around ilow. */
-            for (ihigh = 0; ihigh < 4; ihigh++) {
-                int dhigh, decoded, dec_diff, pos;
-                uint32_t ssd;
-                struct TrellisNode* node;
-
-                dhigh = cur_node->state.scale_factor *
-                        high_inv_quant[ihigh] >> 10;
-                decoded = av_clip(dhigh + cur_node->state.s_predictor,
-                                  -16384, 16383);
-                dec_diff = xhigh - decoded;
-
-                STORE_NODE(1, update_high_predictor(&node->state, dhigh, ihigh), ihigh);
-            }
-        }
-
-        for (j = 0; j < 2; j++) {
-            FFSWAP(struct TrellisNode**, nodes[j], nodes_next[j]);
-
-            if (nodes[j][0]->ssd > (1 << 16)) {
-                for (k = 1; k < frontier && nodes[j][k]; k++)
-                    nodes[j][k]->ssd -= nodes[j][0]->ssd;
-                nodes[j][0]->ssd = 0;
-            }
-        }
-
-        if (i == froze + FREEZE_INTERVAL) {
-            p[0] = &c->paths[0][nodes[0][0]->path];
-            p[1] = &c->paths[1][nodes[1][0]->path];
-            for (j = i; j > froze; j--) {
-                dst[j] = p[1]->value << 6 | p[0]->value;
-                p[0] = &c->paths[0][p[0]->prev];
-                p[1] = &c->paths[1][p[1]->prev];
-            }
-            froze = i;
-            pathn[0] = pathn[1] = 0;
-            memset(nodes[0] + 1, 0, (frontier - 1)*sizeof(**nodes));
-            memset(nodes[1] + 1, 0, (frontier - 1)*sizeof(**nodes));
-        }
-    }
-
-    p[0] = &c->paths[0][nodes[0][0]->path];
-    p[1] = &c->paths[1][nodes[1][0]->path];
-    for (j = i; j > froze; j--) {
-        dst[j] = p[1]->value << 6 | p[0]->value;
-        p[0] = &c->paths[0][p[0]->prev];
-        p[1] = &c->paths[1][p[1]->prev];
-    }
-    c->band[0] = nodes[0][0]->state;
-    c->band[1] = nodes[1][0]->state;
-
-    return i;
-}
-
-static int g722_encode_frame(AVCodecContext *avctx,
-                             uint8_t *dst, int buf_size, void *data)
-{
-    G722Context *c = avctx->priv_data;
-    const int16_t *samples = data;
-    int i;
-
-    if (avctx->trellis)
-        return g722_encode_trellis(avctx, dst, buf_size, data);
-
-    for (i = 0; i < buf_size >> 1; i++) {
-        int xlow, xhigh, ihigh, ilow;
-        filter_samples(c, &samples[2*i], &xlow, &xhigh);
-        ihigh = encode_high(&c->band[1], xhigh);
-        ilow  = encode_low(&c->band[0], xlow);
-        update_high_predictor(&c->band[1], c->band[1].scale_factor *
-                              high_inv_quant[ihigh] >> 10, ihigh);
-        update_low_predictor(&c->band[0], ilow >> 2);
-        *dst++ = ihigh << 6 | ilow;
-    }
-    return i;
-}
-
-AVCodec ff_adpcm_g722_encoder = {
-    .name           = "g722",
-    .type           = AVMEDIA_TYPE_AUDIO,
-    .id             = CODEC_ID_ADPCM_G722,
-    .priv_data_size = sizeof(G722Context),
-    .init           = g722_init,
-    .close          = g722_close,
-    .encode         = g722_encode_frame,
-    .long_name      = NULL_IF_CONFIG_SMALL("G.722 ADPCM"),
-    .sample_fmts    = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16,AV_SAMPLE_FMT_NONE},
-};
-#endif
-
diff --git a/libavcodec/g722.h b/libavcodec/g722.h
new file mode 100644
index 0000000000..5edb6c8119
--- /dev/null
+++ b/libavcodec/g722.h
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) CMU 1993 Computer Science, Speech Group
+ *                        Chengxiang Lu and Alex Hauptmann
+ * Copyright (c) 2005 Steve Underwood <steveu at coppice.org>
+ * Copyright (c) 2009 Kenan Gillet
+ * Copyright (c) 2010 Martin Storsjo
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_G722_H
+#define AVCODEC_G722_H
+
+#include <stdint.h>
+
+#define PREV_SAMPLES_BUF_SIZE 1024
+
+typedef struct {
+    int16_t prev_samples[PREV_SAMPLES_BUF_SIZE]; ///< memory of past decoded samples
+    int     prev_samples_pos;        ///< the number of values in prev_samples
+
+    /**
+     * The band[0] and band[1] correspond respectively to the lower band and higher band.
+     */
+    struct G722Band {
+        int16_t s_predictor;         ///< predictor output value
+        int32_t s_zero;              ///< previous output signal from zero predictor
+        int8_t  part_reconst_mem[2]; ///< signs of previous partially reconstructed signals
+        int16_t prev_qtzd_reconst;   ///< previous quantized reconstructed signal (internal value, using low_inv_quant4)
+        int16_t pole_mem[2];         ///< second-order pole section coefficient buffer
+        int32_t diff_mem[6];         ///< quantizer difference signal memory
+        int16_t zero_mem[6];         ///< Seventh-order zero section coefficient buffer
+        int16_t log_factor;          ///< delayed 2-logarithmic quantizer factor
+        int16_t scale_factor;        ///< delayed quantizer scale factor
+    } band[2];
+
+    struct TrellisNode {
+        struct G722Band state;
+        uint32_t ssd;
+        int path;
+    } *node_buf[2], **nodep_buf[2];
+
+    struct TrellisPath {
+        int value;
+        int prev;
+    } *paths[2];
+} G722Context;
+
+extern const int16_t ff_g722_high_inv_quant[4];
+extern const int16_t ff_g722_low_inv_quant4[16];
+extern const int16_t ff_g722_low_inv_quant6[64];
+
+void ff_g722_update_low_predictor(struct G722Band *band, const int ilow);
+
+void ff_g722_update_high_predictor(struct G722Band *band, const int dhigh,
+                                   const int ihigh);
+
+void ff_g722_apply_qmf(const int16_t *prev_samples, int *xout1, int *xout2);
+
+#endif /* AVCODEC_G722_H */
diff --git a/libavcodec/g722dec.c b/libavcodec/g722dec.c
new file mode 100644
index 0000000000..51f87c9d3c
--- /dev/null
+++ b/libavcodec/g722dec.c
@@ -0,0 +1,147 @@
+/*
+ * Copyright (c) CMU 1993 Computer Science, Speech Group
+ *                        Chengxiang Lu and Alex Hauptmann
+ * Copyright (c) 2005 Steve Underwood <steveu at coppice.org>
+ * Copyright (c) 2009 Kenan Gillet
+ * Copyright (c) 2010 Martin Storsjo
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * G.722 ADPCM audio decoder
+ *
+ * This G.722 decoder is a bit-exact implementation of the ITU G.722
+ * specification for all three specified bitrates - 64000bps, 56000bps
+ * and 48000bps. It passes the ITU tests.
+ *
+ * @note For the 56000bps and 48000bps bitrates, the lowest 1 or 2 bits
+ *       respectively of each byte are ignored.
+ */
+
+#include "avcodec.h"
+#include "get_bits.h"
+#include "g722.h"
+
+static av_cold int g722_decode_init(AVCodecContext * avctx)
+{
+    G722Context *c = avctx->priv_data;
+
+    if (avctx->channels != 1) {
+        av_log(avctx, AV_LOG_ERROR, "Only mono tracks are allowed.\n");
+        return AVERROR_INVALIDDATA;
+    }
+    avctx->sample_fmt = AV_SAMPLE_FMT_S16;
+
+    switch (avctx->bits_per_coded_sample) {
+    case 8:
+    case 7:
+    case 6:
+        break;
+    default:
+        av_log(avctx, AV_LOG_WARNING, "Unsupported bits_per_coded_sample [%d], "
+                                      "assuming 8\n",
+                                      avctx->bits_per_coded_sample);
+    case 0:
+        avctx->bits_per_coded_sample = 8;
+        break;
+    }
+
+    c->band[0].scale_factor = 8;
+    c->band[1].scale_factor = 2;
+    c->prev_samples_pos = 22;
+
+    if (avctx->lowres)
+        avctx->sample_rate /= 2;
+
+    return 0;
+}
+
+static const int16_t low_inv_quant5[32] = {
+     -35,   -35, -2919, -2195, -1765, -1458, -1219, -1023,
+    -858,  -714,  -587,  -473,  -370,  -276,  -190,  -110,
+    2919,  2195,  1765,  1458,  1219,  1023,   858,   714,
+     587,   473,   370,   276,   190,   110,    35,   -35
+};
+
+static const int16_t *low_inv_quants[3] = { ff_g722_low_inv_quant6,
+                                                    low_inv_quant5,
+                                            ff_g722_low_inv_quant4 };
+
+static int g722_decode_frame(AVCodecContext *avctx, void *data,
+                             int *data_size, AVPacket *avpkt)
+{
+    G722Context *c = avctx->priv_data;
+    int16_t *out_buf = data;
+    int j, out_len = 0;
+    const int skip = 8 - avctx->bits_per_coded_sample;
+    const int16_t *quantizer_table = low_inv_quants[skip];
+    GetBitContext gb;
+
+    init_get_bits(&gb, avpkt->data, avpkt->size * 8);
+
+    for (j = 0; j < avpkt->size; j++) {
+        int ilow, ihigh, rlow;
+
+        ihigh = get_bits(&gb, 2);
+        ilow = get_bits(&gb, 6 - skip);
+        skip_bits(&gb, skip);
+
+        rlow = av_clip((c->band[0].scale_factor * quantizer_table[ilow] >> 10)
+                      + c->band[0].s_predictor, -16384, 16383);
+
+        ff_g722_update_low_predictor(&c->band[0], ilow >> (2 - skip));
+
+        if (!avctx->lowres) {
+            const int dhigh = c->band[1].scale_factor *
+                              ff_g722_high_inv_quant[ihigh] >> 10;
+            const int rhigh = av_clip(dhigh + c->band[1].s_predictor,
+                                      -16384, 16383);
+            int xout1, xout2;
+
+            ff_g722_update_high_predictor(&c->band[1], dhigh, ihigh);
+
+            c->prev_samples[c->prev_samples_pos++] = rlow + rhigh;
+            c->prev_samples[c->prev_samples_pos++] = rlow - rhigh;
+            ff_g722_apply_qmf(c->prev_samples + c->prev_samples_pos - 24,
+                              &xout1, &xout2);
+            out_buf[out_len++] = av_clip_int16(xout1 >> 12);
+            out_buf[out_len++] = av_clip_int16(xout2 >> 12);
+            if (c->prev_samples_pos >= PREV_SAMPLES_BUF_SIZE) {
+                memmove(c->prev_samples,
+                        c->prev_samples + c->prev_samples_pos - 22,
+                        22 * sizeof(c->prev_samples[0]));
+                c->prev_samples_pos = 22;
+            }
+        } else
+            out_buf[out_len++] = rlow;
+    }
+    *data_size = out_len << 1;
+    return avpkt->size;
+}
+
+AVCodec ff_adpcm_g722_decoder = {
+    .name           = "g722",
+    .type           = AVMEDIA_TYPE_AUDIO,
+    .id             = CODEC_ID_ADPCM_G722,
+    .priv_data_size = sizeof(G722Context),
+    .init           = g722_decode_init,
+    .decode         = g722_decode_frame,
+    .long_name      = NULL_IF_CONFIG_SMALL("G.722 ADPCM"),
+    .max_lowres     = 1,
+};
diff --git a/libavcodec/g722enc.c b/libavcodec/g722enc.c
new file mode 100644
index 0000000000..bdc30d5d07
--- /dev/null
+++ b/libavcodec/g722enc.c
@@ -0,0 +1,311 @@
+/*
+ * Copyright (c) CMU 1993 Computer Science, Speech Group
+ *                        Chengxiang Lu and Alex Hauptmann
+ * Copyright (c) 2005 Steve Underwood <steveu at coppice.org>
+ * Copyright (c) 2009 Kenan Gillet
+ * Copyright (c) 2010 Martin Storsjo
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * G.722 ADPCM audio encoder
+ */
+
+#include "avcodec.h"
+#include "g722.h"
+
+#define FREEZE_INTERVAL 128
+
+static av_cold int g722_encode_init(AVCodecContext * avctx)
+{
+    G722Context *c = avctx->priv_data;
+
+    if (avctx->channels != 1) {
+        av_log(avctx, AV_LOG_ERROR, "Only mono tracks are allowed.\n");
+        return AVERROR_INVALIDDATA;
+    }
+
+    c->band[0].scale_factor = 8;
+    c->band[1].scale_factor = 2;
+    c->prev_samples_pos = 22;
+
+    if (avctx->trellis) {
+        int frontier = 1 << avctx->trellis;
+        int max_paths = frontier * FREEZE_INTERVAL;
+        int i;
+        for (i = 0; i < 2; i++) {
+            c->paths[i] = av_mallocz(max_paths * sizeof(**c->paths));
+            c->node_buf[i] = av_mallocz(2 * frontier * sizeof(**c->node_buf));
+            c->nodep_buf[i] = av_mallocz(2 * frontier * sizeof(**c->nodep_buf));
+        }
+    }
+
+    return 0;
+}
+
+static av_cold int g722_encode_close(AVCodecContext *avctx)
+{
+    G722Context *c = avctx->priv_data;
+    int i;
+    for (i = 0; i < 2; i++) {
+        av_freep(&c->paths[i]);
+        av_freep(&c->node_buf[i]);
+        av_freep(&c->nodep_buf[i]);
+    }
+    return 0;
+}
+
+static const int16_t low_quant[33] = {
+      35,   72,  110,  150,  190,  233,  276,  323,
+     370,  422,  473,  530,  587,  650,  714,  786,
+     858,  940, 1023, 1121, 1219, 1339, 1458, 1612,
+    1765, 1980, 2195, 2557, 2919
+};
+
+static inline void filter_samples(G722Context *c, const int16_t *samples,
+                                  int *xlow, int *xhigh)
+{
+    int xout1, xout2;
+    c->prev_samples[c->prev_samples_pos++] = samples[0];
+    c->prev_samples[c->prev_samples_pos++] = samples[1];
+    ff_g722_apply_qmf(c->prev_samples + c->prev_samples_pos - 24, &xout1, &xout2);
+    *xlow  = xout1 + xout2 >> 13;
+    *xhigh = xout1 - xout2 >> 13;
+    if (c->prev_samples_pos >= PREV_SAMPLES_BUF_SIZE) {
+        memmove(c->prev_samples,
+                c->prev_samples + c->prev_samples_pos - 22,
+                22 * sizeof(c->prev_samples[0]));
+        c->prev_samples_pos = 22;
+    }
+}
+
+static inline int encode_high(const struct G722Band *state, int xhigh)
+{
+    int diff = av_clip_int16(xhigh - state->s_predictor);
+    int pred = 141 * state->scale_factor >> 8;
+           /* = diff >= 0 ? (diff < pred) + 2 : diff >= -pred */
+    return ((diff ^ (diff >> (sizeof(diff)*8-1))) < pred) + 2*(diff >= 0);
+}
+
+static inline int encode_low(const struct G722Band* state, int xlow)
+{
+    int diff  = av_clip_int16(xlow - state->s_predictor);
+           /* = diff >= 0 ? diff : -(diff + 1) */
+    int limit = diff ^ (diff >> (sizeof(diff)*8-1));
+    int i = 0;
+    limit = limit + 1 << 10;
+    if (limit > low_quant[8] * state->scale_factor)
+        i = 9;
+    while (i < 29 && limit > low_quant[i] * state->scale_factor)
+        i++;
+    return (diff < 0 ? (i < 2 ? 63 : 33) : 61) - i;
+}
+
+static int g722_encode_trellis(AVCodecContext *avctx,
+                               uint8_t *dst, int buf_size, void *data)
+{
+    G722Context *c = avctx->priv_data;
+    const int16_t *samples = data;
+    int i, j, k;
+    int frontier = 1 << avctx->trellis;
+    struct TrellisNode **nodes[2];
+    struct TrellisNode **nodes_next[2];
+    int pathn[2] = {0, 0}, froze = -1;
+    struct TrellisPath *p[2];
+
+    for (i = 0; i < 2; i++) {
+        nodes[i] = c->nodep_buf[i];
+        nodes_next[i] = c->nodep_buf[i] + frontier;
+        memset(c->nodep_buf[i], 0, 2 * frontier * sizeof(*c->nodep_buf));
+        nodes[i][0] = c->node_buf[i] + frontier;
+        nodes[i][0]->ssd = 0;
+        nodes[i][0]->path = 0;
+        nodes[i][0]->state = c->band[i];
+    }
+
+    for (i = 0; i < buf_size >> 1; i++) {
+        int xlow, xhigh;
+        struct TrellisNode *next[2];
+        int heap_pos[2] = {0, 0};
+
+        for (j = 0; j < 2; j++) {
+            next[j] = c->node_buf[j] + frontier*(i & 1);
+            memset(nodes_next[j], 0, frontier * sizeof(**nodes_next));
+        }
+
+        filter_samples(c, &samples[2*i], &xlow, &xhigh);
+
+        for (j = 0; j < frontier && nodes[0][j]; j++) {
+            /* Only k >> 2 affects the future adaptive state, therefore testing
+             * small steps that don't change k >> 2 is useless, the orignal
+             * value from encode_low is better than them. Since we step k
+             * in steps of 4, make sure range is a multiple of 4, so that
+             * we don't miss the original value from encode_low. */
+            int range = j < frontier/2 ? 4 : 0;
+            struct TrellisNode *cur_node = nodes[0][j];
+
+            int ilow = encode_low(&cur_node->state, xlow);
+
+            for (k = ilow - range; k <= ilow + range && k <= 63; k += 4) {
+                int decoded, dec_diff, pos;
+                uint32_t ssd;
+                struct TrellisNode* node;
+
+                if (k < 0)
+                    continue;
+
+                decoded = av_clip((cur_node->state.scale_factor *
+                                  ff_g722_low_inv_quant6[k] >> 10)
+                                + cur_node->state.s_predictor, -16384, 16383);
+                dec_diff = xlow - decoded;
+
+#define STORE_NODE(index, UPDATE, VALUE)\
+                ssd = cur_node->ssd + dec_diff*dec_diff;\
+                /* Check for wraparound. Using 64 bit ssd counters would \
+                 * be simpler, but is slower on x86 32 bit. */\
+                if (ssd < cur_node->ssd)\
+                    continue;\
+                if (heap_pos[index] < frontier) {\
+                    pos = heap_pos[index]++;\
+                    assert(pathn[index] < FREEZE_INTERVAL * frontier);\
+                    node = nodes_next[index][pos] = next[index]++;\
+                    node->path = pathn[index]++;\
+                } else {\
+                    /* Try to replace one of the leaf nodes with the new \
+                     * one, but not always testing the same leaf position */\
+                    pos = (frontier>>1) + (heap_pos[index] & ((frontier>>1) - 1));\
+                    if (ssd >= nodes_next[index][pos]->ssd)\
+                        continue;\
+                    heap_pos[index]++;\
+                    node = nodes_next[index][pos];\
+                }\
+                node->ssd = ssd;\
+                node->state = cur_node->state;\
+                UPDATE;\
+                c->paths[index][node->path].value = VALUE;\
+                c->paths[index][node->path].prev = cur_node->path;\
+                /* Sift the newly inserted node up in the heap to restore \
+                 * the heap property */\
+                while (pos > 0) {\
+                    int parent = (pos - 1) >> 1;\
+                    if (nodes_next[index][parent]->ssd <= ssd)\
+                        break;\
+                    FFSWAP(struct TrellisNode*, nodes_next[index][parent],\
+                                                nodes_next[index][pos]);\
+                    pos = parent;\
+                }
+                STORE_NODE(0, ff_g722_update_low_predictor(&node->state, k >> 2), k);
+            }
+        }
+
+        for (j = 0; j < frontier && nodes[1][j]; j++) {
+            int ihigh;
+            struct TrellisNode *cur_node = nodes[1][j];
+
+            /* We don't try to get any initial guess for ihigh via
+             * encode_high - since there's only 4 possible values, test
+             * them all. Testing all of these gives a much, much larger
+             * gain than testing a larger range around ilow. */
+            for (ihigh = 0; ihigh < 4; ihigh++) {
+                int dhigh, decoded, dec_diff, pos;
+                uint32_t ssd;
+                struct TrellisNode* node;
+
+                dhigh = cur_node->state.scale_factor *
+                        ff_g722_high_inv_quant[ihigh] >> 10;
+                decoded = av_clip(dhigh + cur_node->state.s_predictor,
+                                  -16384, 16383);
+                dec_diff = xhigh - decoded;
+
+                STORE_NODE(1, ff_g722_update_high_predictor(&node->state, dhigh, ihigh), ihigh);
+            }
+        }
+
+        for (j = 0; j < 2; j++) {
+            FFSWAP(struct TrellisNode**, nodes[j], nodes_next[j]);
+
+            if (nodes[j][0]->ssd > (1 << 16)) {
+                for (k = 1; k < frontier && nodes[j][k]; k++)
+                    nodes[j][k]->ssd -= nodes[j][0]->ssd;
+                nodes[j][0]->ssd = 0;
+            }
+        }
+
+        if (i == froze + FREEZE_INTERVAL) {
+            p[0] = &c->paths[0][nodes[0][0]->path];
+            p[1] = &c->paths[1][nodes[1][0]->path];
+            for (j = i; j > froze; j--) {
+                dst[j] = p[1]->value << 6 | p[0]->value;
+                p[0] = &c->paths[0][p[0]->prev];
+                p[1] = &c->paths[1][p[1]->prev];
+            }
+            froze = i;
+            pathn[0] = pathn[1] = 0;
+            memset(nodes[0] + 1, 0, (frontier - 1)*sizeof(**nodes));
+            memset(nodes[1] + 1, 0, (frontier - 1)*sizeof(**nodes));
+        }
+    }
+
+    p[0] = &c->paths[0][nodes[0][0]->path];
+    p[1] = &c->paths[1][nodes[1][0]->path];
+    for (j = i; j > froze; j--) {
+        dst[j] = p[1]->value << 6 | p[0]->value;
+        p[0] = &c->paths[0][p[0]->prev];
+        p[1] = &c->paths[1][p[1]->prev];
+    }
+    c->band[0] = nodes[0][0]->state;
+    c->band[1] = nodes[1][0]->state;
+
+    return i;
+}
+
+static int g722_encode_frame(AVCodecContext *avctx,
+                             uint8_t *dst, int buf_size, void *data)
+{
+    G722Context *c = avctx->priv_data;
+    const int16_t *samples = data;
+    int i;
+
+    if (avctx->trellis)
+        return g722_encode_trellis(avctx, dst, buf_size, data);
+
+    for (i = 0; i < buf_size >> 1; i++) {
+        int xlow, xhigh, ihigh, ilow;
+        filter_samples(c, &samples[2*i], &xlow, &xhigh);
+        ihigh = encode_high(&c->band[1], xhigh);
+        ilow  = encode_low(&c->band[0], xlow);
+        ff_g722_update_high_predictor(&c->band[1], c->band[1].scale_factor *
+                                      ff_g722_high_inv_quant[ihigh] >> 10, ihigh);
+        ff_g722_update_low_predictor(&c->band[0], ilow >> 2);
+        *dst++ = ihigh << 6 | ilow;
+    }
+    return i;
+}
+
+AVCodec ff_adpcm_g722_encoder = {
+    .name           = "g722",
+    .type           = AVMEDIA_TYPE_AUDIO,
+    .id             = CODEC_ID_ADPCM_G722,
+    .priv_data_size = sizeof(G722Context),
+    .init           = g722_encode_init,
+    .close          = g722_encode_close,
+    .encode         = g722_encode_frame,
+    .long_name      = NULL_IF_CONFIG_SMALL("G.722 ADPCM"),
+    .sample_fmts    = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16,AV_SAMPLE_FMT_NONE},
+};
diff --git a/libavcodec/h263.h b/libavcodec/h263.h
index b2b6613536..1a3c85e22e 100644
--- a/libavcodec/h263.h
+++ b/libavcodec/h263.h
@@ -200,48 +200,6 @@ static inline int get_p_cbp(MpegEncContext * s,
     return cbp;
 }
 
-static inline int get_b_cbp(MpegEncContext * s, DCTELEM block[6][64],
-                            int motion_x, int motion_y, int mb_type){
-    int cbp=0, i;
-
-    if(s->flags & CODEC_FLAG_CBP_RD){
-        int score=0;
-        const int lambda= s->lambda2 >> (FF_LAMBDA_SHIFT - 6);
-
-        for(i=0; i<6; i++){
-            if(s->coded_score[i] < 0){
-                score += s->coded_score[i];
-                cbp |= 1 << (5 - i);
-            }
-        }
-
-        if(cbp){
-            int zero_score= -6;
-            if ((motion_x | motion_y | s->dquant | mb_type) == 0){
-                zero_score-= 4; //2*MV + mb_type + cbp bit
-            }
-
-            zero_score*= lambda;
-            if(zero_score <= score){
-                cbp=0;
-            }
-        }
-
-        for (i = 0; i < 6; i++) {
-            if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i))&1)==0 ){
-                s->block_last_index[i]= -1;
-                s->dsp.clear_block(s->block[i]);
-            }
-        }
-    }else{
-        for (i = 0; i < 6; i++) {
-            if (s->block_last_index[i] >= 0)
-                cbp |= 1 << (5 - i);
-        }
-    }
-    return cbp;
-}
-
 static inline void memsetw(short *tab, int val, int n)
 {
     int i;
diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index 5f8b7925a4..6ec77f5b44 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -1060,7 +1060,6 @@ static av_cold void common_init(H264Context *h){
 
     h->dequant_coeff_pps= -1;
     s->unrestricted_mv=1;
-    s->decode=1; //FIXME
 
     s->dsp.dct_bits = 16;
     dsputil_init(&s->dsp, s->avctx); // needed so that idct permutation is known early
diff --git a/libavcodec/mpeg12.c b/libavcodec/mpeg12.c
index 7d469530d0..b5dfc42cc7 100644
--- a/libavcodec/mpeg12.c
+++ b/libavcodec/mpeg12.c
@@ -735,8 +735,9 @@ static void exchange_uv(MpegEncContext *s)
 #define MT_16X8  2
 #define MT_DMV   3
 
-static int mpeg_decode_mb(MpegEncContext *s, DCTELEM block[12][64])
+static int mpeg_decode_mb(Mpeg1Context *s1, DCTELEM block[12][64])
 {
+    MpegEncContext *s = &s1->mpeg_enc_ctx;
     int i, j, k, cbp, val, mb_type, motion_type;
     const int mb_block_count = 4 + (1 << s->chroma_format);
 
@@ -910,7 +911,7 @@ static int mpeg_decode_mb(MpegEncContext *s, DCTELEM block[12][64])
                             s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
                                 mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
                             /* full_pel: only for MPEG-1 */
-                            if (s->full_pel[i]) {
+                            if (s1->full_pel[i]) {
                                 s->mv[i][0][0] <<= 1;
                                 s->mv[i][0][1] <<= 1;
                             }
@@ -1112,20 +1113,6 @@ static int mpeg_decode_mb(MpegEncContext *s, DCTELEM block[12][64])
     return 0;
 }
 
-typedef struct Mpeg1Context {
-    MpegEncContext mpeg_enc_ctx;
-    int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
-    int repeat_field; /* true if we must repeat the field */
-    AVPanScan pan_scan;              /**< some temporary storage for the panscan */
-    int slice_count;
-    int swap_uv;//indicate VCR2
-    int save_aspect_info;
-    int save_width, save_height, save_progressive_seq;
-    AVRational frame_rate_ext;       ///< MPEG-2 specific framerate modificator
-    int sync;                        ///< Did we reach a sync point like a GOP/SEQ/KEYFrame?
-    int tmpgexs;
-} Mpeg1Context;
-
 static av_cold int mpeg_decode_init(AVCodecContext *avctx)
 {
     Mpeg1Context *s = avctx->priv_data;
@@ -1376,7 +1363,7 @@ static int mpeg1_decode_picture(AVCodecContext *avctx,
 
     vbv_delay = get_bits(&s->gb, 16);
     if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) {
-        s->full_pel[0] = get_bits1(&s->gb);
+        s1->full_pel[0] = get_bits1(&s->gb);
         f_code = get_bits(&s->gb, 3);
         if (f_code == 0 && (avctx->err_recognition & AV_EF_BITSTREAM))
             return -1;
@@ -1384,7 +1371,7 @@ static int mpeg1_decode_picture(AVCodecContext *avctx,
         s->mpeg_f_code[0][1] = f_code;
     }
     if (s->pict_type == AV_PICTURE_TYPE_B) {
-        s->full_pel[1] = get_bits1(&s->gb);
+        s1->full_pel[1] = get_bits1(&s->gb);
         f_code = get_bits(&s->gb, 3);
         if (f_code == 0 && (avctx->err_recognition & AV_EF_BITSTREAM))
             return -1;
@@ -1532,7 +1519,7 @@ static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
 {
     MpegEncContext *s = &s1->mpeg_enc_ctx;
 
-    s->full_pel[0] = s->full_pel[1] = 0;
+    s1->full_pel[0] = s1->full_pel[1] = 0;
     s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
     s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
     s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
@@ -1763,7 +1750,7 @@ static int mpeg_decode_slice(Mpeg1Context *s1, int mb_y,
         if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1)
             ff_xvmc_init_block(s); // set s->block
 
-        if (mpeg_decode_mb(s, s->block) < 0)
+        if (mpeg_decode_mb(s1, s->block) < 0)
             return -1;
 
         if (s->current_picture.f.motion_val[0] && !s->encoding) { // note motion_val is normally NULL unless we want to extract the MVs
@@ -2171,7 +2158,7 @@ static void mpeg_decode_gop(AVCodecContext *avctx,
     time_code_seconds  = get_bits(&s->gb, 6);
     time_code_pictures = get_bits(&s->gb, 6);
 
-    s->closed_gop = get_bits1(&s->gb);
+    s1->closed_gop = get_bits1(&s->gb);
     /*broken_link indicate that after editing the
       reference frames of the first B-Frames after GOP I-Frame
       are missing (open gop)*/
@@ -2321,7 +2308,8 @@ static int decode_chunks(AVCodecContext *avctx,
                 }
 
                 if (CONFIG_VDPAU && uses_vdpau(avctx))
-                    ff_vdpau_mpeg_picture_complete(s2, buf, buf_size, s->slice_count);
+                    ff_vdpau_mpeg_picture_complete(s, buf, buf_size, s->slice_count);
+
 
                 if (slice_end(avctx, picture)) {
                     if (s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice
@@ -2450,7 +2438,7 @@ static int decode_chunks(AVCodecContext *avctx,
                 if (s2->last_picture_ptr == NULL) {
                 /* Skip B-frames if we do not have reference frames and gop is not closed */
                     if (s2->pict_type == AV_PICTURE_TYPE_B) {
-                        if (!s2->closed_gop)
+                        if (!s->closed_gop)
                             break;
                     }
                 }
@@ -2535,6 +2523,7 @@ static void flush(AVCodecContext *avctx)
     Mpeg1Context *s = avctx->priv_data;
 
     s->sync=0;
+    s->closed_gop = 0;
 
     ff_mpeg_flush(avctx);
 }
diff --git a/libavcodec/mpeg12.h b/libavcodec/mpeg12.h
index 541b66bd94..2f75d39454 100644
--- a/libavcodec/mpeg12.h
+++ b/libavcodec/mpeg12.h
@@ -30,6 +30,22 @@
 extern VLC ff_dc_lum_vlc;
 extern VLC ff_dc_chroma_vlc;
 
+typedef struct Mpeg1Context {
+    MpegEncContext mpeg_enc_ctx;
+    int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
+    int repeat_field; /* true if we must repeat the field */
+    AVPanScan pan_scan;              /**< some temporary storage for the panscan */
+    int slice_count;
+    int swap_uv;//indicate VCR2
+    int save_aspect_info;
+    int save_width, save_height, save_progressive_seq;
+    AVRational frame_rate_ext;       ///< MPEG-2 specific framerate modificator
+    int sync;                        ///< Did we reach a sync point like a GOP/SEQ/KEYFrame?
+    int full_pel[2];
+    int closed_gop;                  ///< GOP is closed
+    int tmpgexs;
+} Mpeg1Context;
+
 extern uint8_t ff_mpeg12_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3];
 
 void ff_mpeg12_common_init(MpegEncContext *s);
diff --git a/libavcodec/mpeg4videoenc.c b/libavcodec/mpeg4videoenc.c
index dac9a9c885..0c5c5f2280 100644
--- a/libavcodec/mpeg4videoenc.c
+++ b/libavcodec/mpeg4videoenc.c
@@ -425,6 +425,46 @@ static inline void mpeg4_encode_blocks(MpegEncContext * s, DCTELEM block[6][64],
     }
 }
 
+static inline int get_b_cbp(MpegEncContext * s, DCTELEM block[6][64],
+                            int motion_x, int motion_y, int mb_type)
+{
+    int cbp = 0, i;
+
+    if (s->flags & CODEC_FLAG_CBP_RD) {
+        int score = 0;
+        const int lambda = s->lambda2 >> (FF_LAMBDA_SHIFT - 6);
+
+        for (i = 0; i < 6; i++)
+            if (s->coded_score[i] < 0) {
+                score += s->coded_score[i];
+                cbp   |= 1 << (5 - i);
+            }
+
+        if (cbp) {
+            int zero_score = -6;
+            if ((motion_x | motion_y | s->dquant | mb_type) == 0)
+                zero_score -= 4; //2*MV + mb_type + cbp bit
+
+            zero_score *= lambda;
+            if (zero_score <= score)
+                cbp = 0;
+        }
+
+        for (i = 0; i < 6; i++) {
+            if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i)) & 1) == 0) {
+                s->block_last_index[i] = -1;
+                s->dsp.clear_block(s->block[i]);
+            }
+        }
+    } else {
+        for (i = 0; i < 6; i++) {
+            if (s->block_last_index[i] >= 0)
+                cbp |= 1 << (5 - i);
+        }
+    }
+    return cbp;
+}
+
 //FIXME this is duplicated to h263.c
 static const int dquant_code[5]= {1,0,9,2,3};
 
@@ -1213,7 +1253,6 @@ static av_cold int encode_init(AVCodecContext *avctx)
     s->inter_ac_vlc_length     = uni_mpeg4_inter_rl_len;
     s->inter_ac_vlc_last_length= uni_mpeg4_inter_rl_len + 128*64;
     s->luma_dc_vlc_length= uni_DCtab_lum_len;
-    s->chroma_dc_vlc_length= uni_DCtab_chrom_len;
     s->ac_esc_length= 7+2+1+6+1+12+1;
     s->y_dc_scale_table= ff_mpeg4_y_dc_scale_table;
     s->c_dc_scale_table= ff_mpeg4_c_dc_scale_table;
diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
index fffa36a456..69dec5f11d 100644
--- a/libavcodec/mpegvideo.c
+++ b/libavcodec/mpegvideo.c
@@ -2425,7 +2425,6 @@ void ff_mpeg_flush(AVCodecContext *avctx){
     s->current_picture_ptr = s->last_picture_ptr = s->next_picture_ptr = NULL;
 
     s->mb_x= s->mb_y= 0;
-    s->closed_gop= 0;
 
     s->parse_context.state= -1;
     s->parse_context.frame_start_found= 0;
diff --git a/libavcodec/mpegvideo.h b/libavcodec/mpegvideo.h
index d97212c358..93839e1f89 100644
--- a/libavcodec/mpegvideo.h
+++ b/libavcodec/mpegvideo.h
@@ -236,7 +236,6 @@ typedef struct MpegEncContext {
     int coded_picture_number;  ///< used to set pic->coded_picture_number, should not be used for/by anything else
     int picture_number;       //FIXME remove, unclear definition
     int picture_in_gop_number; ///< 0-> first pic in gop, ...
-    int b_frames_since_non_b;  ///< used for encoding, relative to not yet reordered input
     int mb_width, mb_height;   ///< number of MBs horizontally & vertically
     int mb_stride;             ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
     int b8_stride;             ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
@@ -305,7 +304,6 @@ typedef struct MpegEncContext {
     int last_dc[3];                ///< last DC values for MPEG1
     int16_t *dc_val_base;
     int16_t *dc_val[3];            ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
-    int16_t dc_cache[4*5];
     const uint8_t *y_dc_scale_table;     ///< qscale -> y_dc_scale table
     const uint8_t *c_dc_scale_table;     ///< qscale -> c_dc_scale table
     const uint8_t *chroma_qscale_table;  ///< qscale -> chroma_qscale (h263)
@@ -333,7 +331,6 @@ typedef struct MpegEncContext {
     int *lambda_table;
     int adaptive_quant;         ///< use adaptive quantization
     int dquant;                 ///< qscale difference to prev qscale
-    int closed_gop;             ///< MPEG1/2 GOP is closed
     int pict_type;              ///< AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
     int last_pict_type; //FIXME removes
     int last_non_b_pict_type;   ///< used for mpeg4 gmc b-frames & ratecontrol
@@ -345,7 +342,6 @@ typedef struct MpegEncContext {
     /* motion compensation */
     int unrestricted_mv;        ///< mv can point outside of the coded picture
     int h263_long_vectors;      ///< use horrible h263v1 long vector mode
-    int decode;                 ///< if 0 then decoding will be skipped (for encoding b frames for example)
 
     DSPContext dsp;             ///< pointers for accelerated dsp functions
     int f_code;                 ///< forward MV resolution
@@ -440,7 +436,6 @@ typedef struct MpegEncContext {
     uint8_t *inter_ac_vlc_length;
     uint8_t *inter_ac_vlc_last_length;
     uint8_t *luma_dc_vlc_length;
-    uint8_t *chroma_dc_vlc_length;
 #define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
 
     int coded_score[8];
@@ -462,7 +457,6 @@ typedef struct MpegEncContext {
     void *opaque;              ///< private data for the user
 
     /* bit rate control */
-    int64_t wanted_bits;
     int64_t total_bits;
     int frame_bits;                ///< bits used for the current frame
     int next_lambda;               ///< next lambda used for retrying to encode a frame
@@ -643,7 +637,6 @@ typedef struct MpegEncContext {
     int chroma_y_shift;
 
     int progressive_frame;
-    int full_pel[2];
     int interlaced_dct;
     int first_slice;
     int first_field;         ///< is 1 for the first field of a field picture 0 otherwise
diff --git a/libavcodec/vdpau.c b/libavcodec/vdpau.c
index ce5103a6af..120c9dcf82 100644
--- a/libavcodec/vdpau.c
+++ b/libavcodec/vdpau.c
@@ -190,9 +190,10 @@ void ff_vdpau_h264_picture_complete(MpegEncContext *s)
     render->bitstream_buffers_used = 0;
 }
 
-void ff_vdpau_mpeg_picture_complete(MpegEncContext *s, const uint8_t *buf,
+void ff_vdpau_mpeg_picture_complete(Mpeg1Context *s1, const uint8_t *buf,
                                     int buf_size, int slice_count)
 {
+    MpegEncContext *s = &s1->mpeg_enc_ctx;
     struct vdpau_render_state *render, *last, *next;
     int i;
 
@@ -211,8 +212,8 @@ void ff_vdpau_mpeg_picture_complete(MpegEncContext *s, const uint8_t *buf,
     render->info.mpeg.alternate_scan             = s->alternate_scan;
     render->info.mpeg.q_scale_type               = s->q_scale_type;
     render->info.mpeg.top_field_first            = s->top_field_first;
-    render->info.mpeg.full_pel_forward_vector    = s->full_pel[0]; // MPEG-1 only.  Set 0 for MPEG-2
-    render->info.mpeg.full_pel_backward_vector   = s->full_pel[1]; // MPEG-1 only.  Set 0 for MPEG-2
+    render->info.mpeg.full_pel_forward_vector    = s1->full_pel[0]; // MPEG-1 only.  Set 0 for MPEG-2
+    render->info.mpeg.full_pel_backward_vector   = s1->full_pel[1]; // MPEG-1 only.  Set 0 for MPEG-2
     render->info.mpeg.f_code[0][0]               = s->mpeg_f_code[0][0]; // For MPEG-1 fill both horiz. & vert.
     render->info.mpeg.f_code[0][1]               = s->mpeg_f_code[0][1];
     render->info.mpeg.f_code[1][0]               = s->mpeg_f_code[1][0];
diff --git a/libavcodec/vdpau_internal.h b/libavcodec/vdpau_internal.h
index 0a8d0b6b55..2d8a5d8e6f 100644
--- a/libavcodec/vdpau_internal.h
+++ b/libavcodec/vdpau_internal.h
@@ -26,11 +26,12 @@
 
 #include <stdint.h>
 #include "mpegvideo.h"
+#include "mpeg12.h"
 
 void ff_vdpau_add_data_chunk(MpegEncContext *s, const uint8_t *buf,
                              int buf_size);
 
-void ff_vdpau_mpeg_picture_complete(MpegEncContext *s, const uint8_t *buf,
+void ff_vdpau_mpeg_picture_complete(Mpeg1Context *s1, const uint8_t *buf,
                                     int buf_size, int slice_count);
 
 void ff_vdpau_h264_picture_start(MpegEncContext *s);
diff --git a/libavcodec/vorbisdec.c b/libavcodec/vorbisdec.c
index 59d551e894..675de02d86 100644
--- a/libavcodec/vorbisdec.c
+++ b/libavcodec/vorbisdec.c
@@ -966,7 +966,7 @@ static int vorbis_parse_id_hdr(vorbis_context *vc)
 
 static av_cold int vorbis_decode_init(AVCodecContext *avccontext)
 {
-    vorbis_context *vc = avccontext->priv_data ;
+    vorbis_context *vc = avccontext->priv_data;
     uint8_t *headers   = avccontext->extradata;
     int headers_len    = avccontext->extradata_size;
     uint8_t *header_start[3];
@@ -1030,7 +1030,7 @@ static av_cold int vorbis_decode_init(AVCodecContext *avccontext)
     avccontext->sample_rate = vc->audio_samplerate;
     avccontext->frame_size  = FFMIN(vc->blocksize[0], vc->blocksize[1]) >> 2;
 
-    return 0 ;
+    return 0;
 }
 
 // Decode audiopackets -------------------------------------------------
@@ -1608,10 +1608,10 @@ static int vorbis_decode_frame(AVCodecContext *avccontext,
 {
     const uint8_t *buf = avpkt->data;
     int buf_size       = avpkt->size;
-    vorbis_context *vc = avccontext->priv_data ;
+    vorbis_context *vc = avccontext->priv_data;
     GetBitContext *gb = &(vc->gb);
     const float *channel_ptrs[255];
-    int i, len;
+    int i, len, out_size;
 
     if (!buf_size)
         return 0;
@@ -1630,12 +1630,19 @@ static int vorbis_decode_frame(AVCodecContext *avccontext,
     if (!vc->first_frame) {
         vc->first_frame = 1;
         *data_size = 0;
-        return buf_size ;
+        return buf_size;
     }
 
     av_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
             get_bits_count(gb) / 8, get_bits_count(gb) % 8, len);
 
+    out_size = len * vc->audio_channels *
+               av_get_bytes_per_sample(avccontext->sample_fmt);
+    if (*data_size < out_size) {
+        av_log(avccontext, AV_LOG_ERROR, "output buffer is too small\n");
+        return AVERROR(EINVAL);
+    }
+
     if (vc->audio_channels > 8) {
         for (i = 0; i < vc->audio_channels; i++)
             channel_ptrs[i] = vc->channel_floors + i * len;
@@ -1651,10 +1658,9 @@ static int vorbis_decode_frame(AVCodecContext *avccontext,
         vc->fmt_conv.float_to_int16_interleave(data, channel_ptrs, len,
                                                vc->audio_channels);
 
-    *data_size = len * vc->audio_channels *
-                 av_get_bytes_per_sample(avccontext->sample_fmt);
+    *data_size = out_size;
 
-    return buf_size ;
+    return buf_size;
 }
 
 // Close decoder
@@ -1665,7 +1671,7 @@ static av_cold int vorbis_decode_close(AVCodecContext *avccontext)
 
     vorbis_free(vc);
 
-    return 0 ;
+    return 0;
 }
 
 AVCodec ff_vorbis_decoder = {
diff --git a/libavcodec/wavpack.c b/libavcodec/wavpack.c
index 0a0d8ab23e..5ff9795ef8 100644
--- a/libavcodec/wavpack.c
+++ b/libavcodec/wavpack.c
@@ -808,15 +808,13 @@ static int wavpack_decode_block(AVCodecContext *avctx, int block_no,
     }
     s->frame_flags = AV_RL32(buf); buf += 4;
     if(s->frame_flags&0x80){
-        bpp = sizeof(float);
         avctx->sample_fmt = AV_SAMPLE_FMT_FLT;
     } else if((s->frame_flags&0x03) <= 1){
-        bpp = 2;
         avctx->sample_fmt = AV_SAMPLE_FMT_S16;
     } else {
-        bpp = 4;
         avctx->sample_fmt = AV_SAMPLE_FMT_S32;
     }
+    bpp = av_get_bytes_per_sample(avctx->sample_fmt);
     samples = (uint8_t*)samples + bpp * wc->ch_offset;
 
     s->stereo = !(s->frame_flags & WV_MONO);
diff --git a/libavformat/Makefile b/libavformat/Makefile
index 15ccb291ed..47045d321c 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -147,7 +147,7 @@ OBJS-$(CONFIG_MOV_MUXER)                 += movenc.o riff.o isom.o avc.o \
                                             movenchint.o rtpenc_chain.o
 OBJS-$(CONFIG_MP2_MUXER)                 += mp3enc.o rawenc.o
 OBJS-$(CONFIG_MP3_DEMUXER)               += mp3dec.o
-OBJS-$(CONFIG_MP3_MUXER)                 += mp3enc.o rawenc.o
+OBJS-$(CONFIG_MP3_MUXER)                 += mp3enc.o rawenc.o id3v2enc.o
 OBJS-$(CONFIG_MPC_DEMUXER)               += mpc.o apetag.o
 OBJS-$(CONFIG_MPC8_DEMUXER)              += mpc8.o
 OBJS-$(CONFIG_MPEG1SYSTEM_MUXER)         += mpegenc.o
diff --git a/libavformat/id3v2.h b/libavformat/id3v2.h
index f309f05c5b..ebd4a67a33 100644
--- a/libavformat/id3v2.h
+++ b/libavformat/id3v2.h
@@ -87,6 +87,14 @@ void ff_id3v2_read(AVFormatContext *s, const char *magic);
 void ff_id3v2_read_all(AVFormatContext *s, const char *magic, ID3v2ExtraMeta **extra_meta);
 
 /**
+ * Write an ID3v2 tag.
+ * @param id3v2_version Subversion of ID3v2; supported values are 3 and 4
+ * @param magic magic bytes to identify the header
+ * If in doubt, use ID3v2_DEFAULT_MAGIC.
+ */
+int ff_id3v2_write(struct AVFormatContext *s, int id3v2_version, const char *magic);
+
+/**
  * Free memory allocated parsing special (non-text) metadata.
  * @param extra_meta Pointer to a pointer to the head of a ID3v2ExtraMeta list, *extra_meta is set to NULL.
  */
diff --git a/libavformat/id3v2enc.c b/libavformat/id3v2enc.c
new file mode 100644
index 0000000000..4e1cd75c79
--- /dev/null
+++ b/libavformat/id3v2enc.c
@@ -0,0 +1,146 @@
+/*
+ * ID3v2 header writer
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdint.h>
+
+#include "libavutil/dict.h"
+#include "libavutil/intreadwrite.h"
+#include "avformat.h"
+#include "avio.h"
+#include "id3v2.h"
+
+static void id3v2_put_size(AVFormatContext *s, int size)
+{
+    avio_w8(s->pb, size >> 21 & 0x7f);
+    avio_w8(s->pb, size >> 14 & 0x7f);
+    avio_w8(s->pb, size >> 7  & 0x7f);
+    avio_w8(s->pb, size       & 0x7f);
+}
+
+static int string_is_ascii(const uint8_t *str)
+{
+    while (*str && *str < 128) str++;
+    return !*str;
+}
+
+/**
+ * Write a text frame with one (normal frames) or two (TXXX frames) strings
+ * according to encoding (only UTF-8 or UTF-16+BOM supported).
+ * @return number of bytes written or a negative error code.
+ */
+static int id3v2_put_ttag(AVFormatContext *s, const char *str1, const char *str2,
+                          uint32_t tag, enum ID3v2Encoding enc)
+{
+    int len;
+    uint8_t *pb;
+    int (*put)(AVIOContext*, const char*);
+    AVIOContext *dyn_buf;
+    if (avio_open_dyn_buf(&dyn_buf) < 0)
+        return AVERROR(ENOMEM);
+
+    /* check if the strings are ASCII-only and use UTF16 only if
+     * they're not */
+    if (enc == ID3v2_ENCODING_UTF16BOM && string_is_ascii(str1) &&
+        (!str2 || string_is_ascii(str2)))
+        enc = ID3v2_ENCODING_ISO8859;
+
+    avio_w8(dyn_buf, enc);
+    if (enc == ID3v2_ENCODING_UTF16BOM) {
+        avio_wl16(dyn_buf, 0xFEFF);      /* BOM */
+        put = avio_put_str16le;
+    } else
+        put = avio_put_str;
+
+    put(dyn_buf, str1);
+    if (str2)
+        put(dyn_buf, str2);
+    len = avio_close_dyn_buf(dyn_buf, &pb);
+
+    avio_wb32(s->pb, tag);
+    id3v2_put_size(s, len);
+    avio_wb16(s->pb, 0);
+    avio_write(s->pb, pb, len);
+
+    av_freep(&pb);
+    return len + ID3v2_HEADER_SIZE;
+}
+
+static int id3v2_check_write_tag(AVFormatContext *s, AVDictionaryEntry *t, const char table[][4],
+                                 enum ID3v2Encoding enc)
+{
+    uint32_t tag;
+    int i;
+
+    if (t->key[0] != 'T' || strlen(t->key) != 4)
+        return -1;
+    tag = AV_RB32(t->key);
+    for (i = 0; *table[i]; i++)
+        if (tag == AV_RB32(table[i]))
+            return id3v2_put_ttag(s, t->value, NULL, tag, enc);
+    return -1;
+}
+
+int ff_id3v2_write(struct AVFormatContext *s, int id3v2_version,
+                   const char *magic)
+{
+    int64_t size_pos, cur_pos;
+    AVDictionaryEntry *t = NULL;
+
+    int totlen = 0, enc = id3v2_version == 3 ? ID3v2_ENCODING_UTF16BOM :
+                                               ID3v2_ENCODING_UTF8;
+
+
+    avio_wb32(s->pb, MKBETAG(magic[0], magic[1], magic[2], id3v2_version));
+    avio_w8(s->pb, 0);
+    avio_w8(s->pb, 0); /* flags */
+
+    /* reserve space for size */
+    size_pos = avio_tell(s->pb);
+    avio_wb32(s->pb, 0);
+
+    ff_metadata_conv(&s->metadata, ff_id3v2_34_metadata_conv, NULL);
+    if (id3v2_version == 4)
+        ff_metadata_conv(&s->metadata, ff_id3v2_4_metadata_conv, NULL);
+
+    while ((t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) {
+        int ret;
+
+        if ((ret = id3v2_check_write_tag(s, t, ff_id3v2_tags, enc)) > 0) {
+            totlen += ret;
+            continue;
+        }
+        if ((ret = id3v2_check_write_tag(s, t, id3v2_version == 3 ?
+                                               ff_id3v2_3_tags : ff_id3v2_4_tags, enc)) > 0) {
+            totlen += ret;
+            continue;
+        }
+
+        /* unknown tag, write as TXXX frame */
+        if ((ret = id3v2_put_ttag(s, t->key, t->value, MKBETAG('T', 'X', 'X', 'X'), enc)) < 0)
+            return ret;
+        totlen += ret;
+    }
+
+    cur_pos = avio_tell(s->pb);
+    avio_seek(s->pb, size_pos, SEEK_SET);
+    id3v2_put_size(s, totlen);
+    avio_seek(s->pb, cur_pos, SEEK_SET);
+    return 0;
+}
diff --git a/libavformat/mp3enc.c b/libavformat/mp3enc.c
index b847350232..793c9c62af 100644
--- a/libavformat/mp3enc.c
+++ b/libavformat/mp3enc.c
@@ -78,66 +78,9 @@ static int id3v1_create_tag(AVFormatContext *s, uint8_t *buf)
     return count;
 }
 
-/* simple formats */
-
-static void id3v2_put_size(AVFormatContext *s, int size)
-{
-    avio_w8(s->pb, size >> 21 & 0x7f);
-    avio_w8(s->pb, size >> 14 & 0x7f);
-    avio_w8(s->pb, size >> 7  & 0x7f);
-    avio_w8(s->pb, size       & 0x7f);
-}
-
-static int string_is_ascii(const uint8_t *str)
-{
-    while (*str && *str < 128) str++;
-    return !*str;
-}
-
-/**
- * Write a text frame with one (normal frames) or two (TXXX frames) strings
- * according to encoding (only UTF-8 or UTF-16+BOM supported).
- * @return number of bytes written or a negative error code.
- */
-static int id3v2_put_ttag(AVFormatContext *s, const char *str1, const char *str2,
-                          uint32_t tag, enum ID3v2Encoding enc)
-{
-    int len;
-    uint8_t *pb;
-    int (*put)(AVIOContext*, const char*);
-    AVIOContext *dyn_buf;
-    if (avio_open_dyn_buf(&dyn_buf) < 0)
-        return AVERROR(ENOMEM);
-
-    /* check if the strings are ASCII-only and use UTF16 only if
-     * they're not */
-    if (enc == ID3v2_ENCODING_UTF16BOM && string_is_ascii(str1) &&
-        (!str2 || string_is_ascii(str2)))
-        enc = ID3v2_ENCODING_ISO8859;
-
-    avio_w8(dyn_buf, enc);
-    if (enc == ID3v2_ENCODING_UTF16BOM) {
-        avio_wl16(dyn_buf, 0xFEFF);      /* BOM */
-        put = avio_put_str16le;
-    } else
-        put = avio_put_str;
-
-    put(dyn_buf, str1);
-    if (str2)
-        put(dyn_buf, str2);
-    len = avio_close_dyn_buf(dyn_buf, &pb);
-
-    avio_wb32(s->pb, tag);
-    id3v2_put_size(s, len);
-    avio_wb16(s->pb, 0);
-    avio_write(s->pb, pb, len);
-
-    av_freep(&pb);
-    return len + ID3v2_HEADER_SIZE;
-}
-
 #define VBR_NUM_BAGS 400
 #define VBR_TOC_SIZE 100
+
 typedef struct MP3Context {
     const AVClass *class;
     int id3v2_version;
@@ -204,21 +147,6 @@ static const AVClass mp3_muxer_class = {
     .version        = LIBAVUTIL_VERSION_INT,
 };
 
-static int id3v2_check_write_tag(AVFormatContext *s, AVDictionaryEntry *t, const char table[][4],
-                                 enum ID3v2Encoding enc)
-{
-    uint32_t tag;
-    int i;
-
-    if (t->key[0] != 'T' || strlen(t->key) != 4)
-        return -1;
-    tag = AV_RB32(t->key);
-    for (i = 0; *table[i]; i++)
-        if (tag == AV_RB32(table[i]))
-            return id3v2_put_ttag(s, t->value, NULL, tag, enc);
-    return -1;
-}
-
 static const int64_t xing_offtbl[2][2] = {{32, 17}, {17,9}};
 
 /*
@@ -363,46 +291,11 @@ static void mp3_fix_xing(AVFormatContext *s)
 static int mp3_write_header(struct AVFormatContext *s)
 {
     MP3Context  *mp3 = s->priv_data;
-    AVDictionaryEntry *t = NULL;
-    int totlen = 0, enc = mp3->id3v2_version == 3 ? ID3v2_ENCODING_UTF16BOM :
-                                                    ID3v2_ENCODING_UTF8;
-    int64_t size_pos, cur_pos;
-
-    avio_wb32(s->pb, MKBETAG('I', 'D', '3', mp3->id3v2_version));
-    avio_w8(s->pb, 0);
-    avio_w8(s->pb, 0); /* flags */
-
-    /* reserve space for size */
-    size_pos = avio_tell(s->pb);
-    avio_wb32(s->pb, 0);
-
-    ff_metadata_conv(&s->metadata, ff_id3v2_34_metadata_conv, NULL);
-    if (mp3->id3v2_version == 4)
-        ff_metadata_conv(&s->metadata, ff_id3v2_4_metadata_conv, NULL);
-
-    while ((t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) {
-        int ret;
+    int ret;
 
-        if ((ret = id3v2_check_write_tag(s, t, ff_id3v2_tags, enc)) > 0) {
-            totlen += ret;
-            continue;
-        }
-        if ((ret = id3v2_check_write_tag(s, t, mp3->id3v2_version == 3 ?
-                                               ff_id3v2_3_tags : ff_id3v2_4_tags, enc)) > 0) {
-            totlen += ret;
-            continue;
-        }
-
-        /* unknown tag, write as TXXX frame */
-        if ((ret = id3v2_put_ttag(s, t->key, t->value, MKBETAG('T', 'X', 'X', 'X'), enc)) < 0)
-            return ret;
-        totlen += ret;
-    }
-
-    cur_pos = avio_tell(s->pb);
-    avio_seek(s->pb, size_pos, SEEK_SET);
-    id3v2_put_size(s, totlen);
-    avio_seek(s->pb, cur_pos, SEEK_SET);
+    ret = ff_id3v2_write(s, mp3->id3v2_version, ID3v2_DEFAULT_MAGIC);
+    if (ret < 0)
+        return ret;
 
     if (s->pb->seekable)
         mp3_write_xing(s);
diff --git a/libswscale/x86/scale.asm b/libswscale/x86/scale.asm
index 0d694453c9..2e754862f0 100644
--- a/libswscale/x86/scale.asm
+++ b/libswscale/x86/scale.asm
@@ -520,7 +520,7 @@ cglobal yuv2planeX_%2_%1, %4, 7, %3
 
     xor             r5,  r5
 
-.pixelloop
+.pixelloop:
 %assign %%i 0
     ; the rep here is for the 8bit output mmx case, where dither covers
     ; 8 pixels but we can only handle 2 pixels per register, and thus 4
@@ -543,7 +543,7 @@ cglobal yuv2planeX_%2_%1, %4, 7, %3
     mova            m2,  m1
 %endif ; %2 == 8/9/10/16
     movsx     cntr_reg,  r1m
-.filterloop_ %+ %%i
+.filterloop_ %+ %%i:
     ; input pixels
     mov             r6, [r2+gprsize*cntr_reg-2*gprsize]
 %if %2 == 16