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twinvq: support multiple frames per packet

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Signed-off-by: Diego Biurrun <diego@biurrun.de>
pull/48/head
Kostya Shishkov 12 years ago committed by Diego Biurrun
parent ddb839e928
commit 1afa8a7568
5 changed files with 123 additions and 61 deletions
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  1. 24
      libavcodec/metasound.c
  2. 18
      libavcodec/metasound_data.c
  3. 49
      libavcodec/twinvq.c
  4. 5
      libavcodec/twinvq.h
  5. 14
      libavcodec/twinvqdec.c

24
libavcodec/metasound.c
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@ -163,7 +163,7 @@ static void read_cb_data(TwinVQContext *tctx, GetBitContext *gb,
static int metasound_read_bitstream(AVCodecContext *avctx, TwinVQContext *tctx,
const uint8_t *buf, int buf_size)
{
TwinVQFrameData *bits = &tctx->bits;
TwinVQFrameData *bits;
const TwinVQModeTab *mtab = tctx->mtab;
int channels = tctx->avctx->channels;
int sub;
@ -172,6 +172,10 @@ static int metasound_read_bitstream(AVCodecContext *avctx, TwinVQContext *tctx,
init_get_bits(&gb, buf, buf_size * 8);
for (tctx->cur_frame = 0; tctx->cur_frame < tctx->frames_per_packet;
tctx->cur_frame++) {
bits = tctx->bits + tctx->cur_frame;
bits->window_type = get_bits(&gb, TWINVQ_WINDOW_TYPE_BITS);
if (bits->window_type > 8) {
@ -179,7 +183,7 @@ static int metasound_read_bitstream(AVCodecContext *avctx, TwinVQContext *tctx,
return AVERROR_INVALIDDATA;
}
bits->ftype = ff_twinvq_wtype_to_ftype_table[tctx->bits.window_type];
bits->ftype = ff_twinvq_wtype_to_ftype_table[tctx->bits[tctx->cur_frame].window_type];
sub = mtab->fmode[bits->ftype].sub;
@ -226,6 +230,11 @@ static int metasound_read_bitstream(AVCodecContext *avctx, TwinVQContext *tctx,
}
}
// subframes are aligned to nibbles
if (get_bits_count(&gb) & 3)
skip_bits(&gb, 4 - (get_bits_count(&gb) & 3));
}
return 0;
}
@ -316,6 +325,12 @@ static av_cold int metasound_decode_init(AVCodecContext *avctx)
case (2 << 16) + (16 << 8) + 16:
tctx->mtab = &ff_metasound_mode1616s;
break;
case (1 << 16) + (22 << 8) + 24:
tctx->mtab = &ff_metasound_mode2224;
break;
case (2 << 16) + (22 << 8) + 24:
tctx->mtab = &ff_metasound_mode2224s;
break;
case (1 << 16) + (44 << 8) + 32:
tctx->mtab = &ff_metasound_mode4432;
break;
@ -341,13 +356,12 @@ static av_cold int metasound_decode_init(AVCodecContext *avctx)
return AVERROR(ENOSYS);
}
avctx->block_align = (avctx->bit_rate * tctx->mtab->size
/ avctx->sample_rate + 7) / 8;
tctx->codec = TWINVQ_CODEC_METASOUND;
tctx->read_bitstream = metasound_read_bitstream;
tctx->dec_bark_env = dec_bark_env;
tctx->decode_ppc = decode_ppc;
tctx->frame_size = avctx->bit_rate * tctx->mtab->size
/ avctx->sample_rate;
return ff_twinvq_decode_init(avctx);
}

18
libavcodec/metasound_data.c
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@ -15244,6 +15244,24 @@ const TwinVQModeTab ff_metasound_mode1616s = {
1024, 16, lsp16, 1, 6, 4, 3, shape16s, 9, 56, 60, 7, 200
};
const TwinVQModeTab ff_metasound_mode2224 = {
{
{ 8, bark_tab_s22_128, 10, fcb22s, 1, 6, cb2224s0, cb2224s1, 15 },
{ 2, bark_tab_m22_512, 20, fcb22m, 2, 6, cb2224m0, cb2224m1, 14 },
{ 1, bark_tab_l22_1024, 32, fcb22l, 4, 6, cb2224l0, cb2224l1, 15 }
},
1024, 16, lsp22, 1, 6, 4, 3, shape22, 9, 56, 36, 7, 200
};
const TwinVQModeTab ff_metasound_mode2224s = {
{
{ 8, bark_tab_s22s_128, 10, fcb22ss, 1, 6, cb2224ss0, cb2224ss1, 15 },
{ 2, bark_tab_m22s_512, 20, fcb22sm, 2, 6, cb2224sm0, cb2224sm1, 14 },
{ 1, bark_tab_l22s_1024, 32, fcb22sl, 4, 6, cb2224sl0, cb2224sl1, 15 }
},
1024, 16, lsp22s, 1, 6, 4, 3, shape22s, 9, 56, 36, 7, 200
};
const TwinVQModeTab ff_metasound_mode4432 = {
{
{ 16, bark_tab_s44_128, 10, fcb44ss, 1, 6, cb4432s0, cb4432s1, 23 },

49
libavcodec/twinvq.c
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@ -215,7 +215,7 @@ static void dec_gain(TwinVQContext *tctx,
enum TwinVQFrameType ftype, float *out)
{
const TwinVQModeTab *mtab = tctx->mtab;
const TwinVQFrameData *bits = &tctx->bits;
const TwinVQFrameData *bits = &tctx->bits[tctx->cur_frame];
int i, j;
int sub = mtab->fmode[ftype].sub;
float step = TWINVQ_AMP_MAX / ((1 << TWINVQ_GAIN_BITS) - 1);
@ -376,11 +376,12 @@ static void imdct_and_window(TwinVQContext *tctx, enum TwinVQFrameType ftype,
}
static void imdct_output(TwinVQContext *tctx, enum TwinVQFrameType ftype,
int wtype, float **out)
int wtype, float **out, int offset)
{
const TwinVQModeTab *mtab = tctx->mtab;
float *prev_buf = tctx->prev_frame + tctx->last_block_pos[0];
int size1, size2, i;
float *out1, *out2;
for (i = 0; i < tctx->avctx->channels; i++)
imdct_and_window(tctx, ftype, wtype,
@ -394,15 +395,17 @@ static void imdct_output(TwinVQContext *tctx, enum TwinVQFrameType ftype,
size2 = tctx->last_block_pos[0];
size1 = mtab->size - size2;
memcpy(&out[0][0], prev_buf, size1 * sizeof(out[0][0]));
memcpy(&out[0][size1], tctx->curr_frame, size2 * sizeof(out[0][0]));
out1 = &out[0][0] + offset;
memcpy(out1, prev_buf, size1 * sizeof(*out1));
memcpy(out1 + size1, tctx->curr_frame, size2 * sizeof(*out1));
if (tctx->avctx->channels == 2) {
memcpy(&out[1][0], &prev_buf[2 * mtab->size],
size1 * sizeof(out[1][0]));
memcpy(&out[1][size1], &tctx->curr_frame[2 * mtab->size],
size2 * sizeof(out[1][0]));
tctx->fdsp.butterflies_float(out[0], out[1], mtab->size);
out2 = &out[1][0] + offset;
memcpy(out2, &prev_buf[2 * mtab->size],
size1 * sizeof(*out2));
memcpy(out2 + size1, &tctx->curr_frame[2 * mtab->size],
size2 * sizeof(*out2));
tctx->fdsp.butterflies_float(out1, out2, mtab->size);
}
}
@ -410,7 +413,7 @@ static void read_and_decode_spectrum(TwinVQContext *tctx, float *out,
enum TwinVQFrameType ftype)
{
const TwinVQModeTab *mtab = tctx->mtab;
TwinVQFrameData *bits = &tctx->bits;
TwinVQFrameData *bits = &tctx->bits[tctx->cur_frame];
int channels = tctx->avctx->channels;
int sub = mtab->fmode[ftype].sub;
int block_size = mtab->size / sub;
@ -483,7 +486,7 @@ int ff_twinvq_decode_frame(AVCodecContext *avctx, void *data,
/* get output buffer */
if (tctx->discarded_packets >= 2) {
frame->nb_samples = mtab->size;
frame->nb_samples = mtab->size * tctx->frames_per_packet;
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return ret;
@ -500,11 +503,17 @@ int ff_twinvq_decode_frame(AVCodecContext *avctx, void *data,
if ((ret = tctx->read_bitstream(avctx, tctx, buf, buf_size)) < 0)
return ret;
read_and_decode_spectrum(tctx, tctx->spectrum, tctx->bits.ftype);
for (tctx->cur_frame = 0; tctx->cur_frame < tctx->frames_per_packet;
tctx->cur_frame++) {
read_and_decode_spectrum(tctx, tctx->spectrum,
tctx->bits[tctx->cur_frame].ftype);
imdct_output(tctx, tctx->bits.ftype, tctx->bits.window_type, out);
imdct_output(tctx, tctx->bits[tctx->cur_frame].ftype,
tctx->bits[tctx->cur_frame].window_type, out,
tctx->cur_frame * mtab->size);
FFSWAP(float *, tctx->curr_frame, tctx->prev_frame);
}
if (tctx->discarded_packets < 2) {
tctx->discarded_packets++;
@ -764,6 +773,20 @@ av_cold int ff_twinvq_decode_init(AVCodecContext *avctx)
tctx->avctx = avctx;
avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
if (!avctx->block_align) {
avctx->block_align = tctx->frame_size + 7 >> 3;
} else if (avctx->block_align * 8 < tctx->frame_size) {
av_log(avctx, AV_LOG_ERROR, "Block align is %d bits, expected %d\n",
avctx->block_align * 8, tctx->frame_size);
return AVERROR_INVALIDDATA;
}
tctx->frames_per_packet = avctx->block_align * 8 / tctx->frame_size;
if (tctx->frames_per_packet > TWINVQ_MAX_FRAMES_PER_PACKET) {
av_log(avctx, AV_LOG_ERROR, "Too many frames per packet (%d)\n",
tctx->frames_per_packet);
return AVERROR_INVALIDDATA;
}
avpriv_float_dsp_init(&tctx->fdsp, avctx->flags & CODEC_FLAG_BITEXACT);
if ((ret = init_mdct_win(tctx))) {
av_log(avctx, AV_LOG_ERROR, "Error initializing MDCT\n");

5
libavcodec/twinvq.h
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@ -58,6 +58,8 @@ enum TwinVQFrameType {
#define TWINVQ_SUBBLOCKS_MAX 16
#define TWINVQ_BARK_N_COEF_MAX 4
#define TWINVQ_MAX_FRAMES_PER_PACKET 2
/**
* Parameters and tables that are different for each frame type
*/
@ -162,7 +164,8 @@ typedef struct TwinVQContext {
// scratch buffers
float *tmp_buf;
TwinVQFrameData bits;
int frame_size, frames_per_packet, cur_frame;
TwinVQFrameData bits[TWINVQ_MAX_FRAMES_PER_PACKET];
enum TwinVQCodec codec;

14
libavcodec/twinvqdec.c
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@ -251,7 +251,7 @@ static void read_cb_data(TwinVQContext *tctx, GetBitContext *gb,
static int twinvq_read_bitstream(AVCodecContext *avctx, TwinVQContext *tctx,
const uint8_t *buf, int buf_size)
{
TwinVQFrameData *bits = &tctx->bits;
TwinVQFrameData *bits = &tctx->bits[0];
const TwinVQModeTab *mtab = tctx->mtab;
int channels = tctx->avctx->channels;
int sub;
@ -268,7 +268,7 @@ static int twinvq_read_bitstream(AVCodecContext *avctx, TwinVQContext *tctx,
return AVERROR_INVALIDDATA;
}
bits->ftype = ff_twinvq_wtype_to_ftype_table[tctx->bits.window_type];
bits->ftype = ff_twinvq_wtype_to_ftype_table[tctx->bits[0].window_type];
sub = mtab->fmode[bits->ftype].sub;
@ -396,13 +396,17 @@ static av_cold int twinvq_decode_init(AVCodecContext *avctx)
return -1;
}
avctx->block_align = (avctx->bit_rate * tctx->mtab->size
/ avctx->sample_rate + 15) / 8;
tctx->codec = TWINVQ_CODEC_VQF;
tctx->read_bitstream = twinvq_read_bitstream;
tctx->dec_bark_env = dec_bark_env;
tctx->decode_ppc = decode_ppc;
tctx->frame_size = avctx->bit_rate * tctx->mtab->size
/ avctx->sample_rate + 8;
if (avctx->block_align && avctx->block_align * 8 / tctx->frame_size > 1) {
av_log(avctx, AV_LOG_ERROR,
"VQF TwinVQ should have only one frame per packet\n");
return AVERROR_INVALIDDATA;
}
return ff_twinvq_decode_init(avctx);
}

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