eessppeelllloo/ffmpeg
1
0
Fork 0
mirror of https://git.ffmpeg.org/ffmpeg.git synced 2025-12-12 18:10:13 +01:00
Code Issues Packages Projects Releases Wiki Activity

SIPR16k decoder

Browse Source 
Originally committed as revision 21234 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Vitor Sessak
2010-01-16 03:54:55 +00:00
parent d79c06b2ad
commit d140b02581
8 changed files with 871 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

44
libavcodec/sipr.c
View File

@@ -51,6 +51,7 @@ typedef struct {
/* bitstream parameters */
uint8_t number_of_fc_indexes;
uint8_t ma_predictor_bits; ///< size in bits of the switched MA predictor
/** size in bits of the i-th stage vector of quantizer */
uint8_t vq_indexes_bits[5];
@@ -64,6 +65,22 @@ typedef struct {
} SiprModeParam;
static const SiprModeParam modes[MODE_COUNT] = {
[MODE_16k] = {
.mode_name = "16k",
.bits_per_frame = 160,
.subframe_count = SUBFRAME_COUNT_16k,
.frames_per_packet = 1,
.pitch_sharp_factor = 0.00,
.number_of_fc_indexes = 10,
.ma_predictor_bits = 1,
.vq_indexes_bits = {7, 8, 7, 7, 7},
.pitch_delay_bits = {9, 6},
.gp_index_bits = 4,
.fc_index_bits = {4, 5, 4, 5, 4, 5, 4, 5, 4, 5},
.gc_index_bits = 5
},
[MODE_8k5] = {
.mode_name = "8k5",
.bits_per_frame = 152,
@@ -72,6 +89,7 @@ static const SiprModeParam modes[MODE_COUNT] = {
.pitch_sharp_factor = 0.8,
.number_of_fc_indexes = 3,
.ma_predictor_bits = 0,
.vq_indexes_bits = {6, 7, 7, 7, 5},
.pitch_delay_bits = {8, 5, 5},
.gp_index_bits = 0,
@@ -87,6 +105,7 @@ static const SiprModeParam modes[MODE_COUNT] = {
.pitch_sharp_factor = 0.8,
.number_of_fc_indexes = 3,
.ma_predictor_bits = 0,
.vq_indexes_bits = {6, 7, 7, 7, 5},
.pitch_delay_bits = {8, 5, 5},
.gp_index_bits = 0,
@@ -102,6 +121,7 @@ static const SiprModeParam modes[MODE_COUNT] = {
.pitch_sharp_factor = 0.85,
.number_of_fc_indexes = 1,
.ma_predictor_bits = 0,
.vq_indexes_bits = {6, 7, 7, 7, 5},
.pitch_delay_bits = {8, 5, 8, 5, 5},
.gp_index_bits = 0,
@@ -173,6 +193,8 @@ static void decode_parameters(SiprParameters* parms, GetBitContext *pgb,
{
int i, j;
parms->ma_pred_switch = get_bits(pgb, p->ma_predictor_bits);
for (i = 0; i < 5; i++)
parms->vq_indexes[i] = get_bits(pgb, p->vq_indexes_bits[i]);
@@ -490,6 +512,9 @@ static av_cold int sipr_decoder_init(AVCodecContext * avctx)
av_log(avctx, AV_LOG_DEBUG, "Mode: %s\n", modes[ctx->mode].mode_name);
if (ctx->mode == MODE_16k)
ff_sipr_init_16k(ctx);
for (i = 0; i < LP_FILTER_ORDER; i++)
ctx->lsp_history[i] = cos((i+1) * M_PI / (LP_FILTER_ORDER + 1));
@@ -498,12 +523,6 @@ static av_cold int sipr_decoder_init(AVCodecContext * avctx)
avctx->sample_fmt = SAMPLE_FMT_FLT;
if (ctx->mode == MODE_16k) {
av_log(avctx, AV_LOG_ERROR, "decoding 16kbps SIPR files is not "
"supported yet.\n");
return -1;
}
dsputil_init(&ctx->dsp, avctx);
return 0;
@@ -518,6 +537,7 @@ static int sipr_decode_frame(AVCodecContext *avctx, void *datap,
const SiprModeParam *mode_par = &modes[ctx->mode];
GetBitContext gb;
float *data = datap;
int subframe_size = ctx->mode == MODE_16k ? L_SUBFR_16k : SUBFR_SIZE;
int i;
ctx->avctx = avctx;
@@ -529,7 +549,7 @@ static int sipr_decode_frame(AVCodecContext *avctx, void *datap,
*data_size = 0;
return -1;
}
if (*data_size < SUBFR_SIZE * mode_par->subframe_count * sizeof(float)) {
if (*data_size < subframe_size * mode_par->subframe_count * sizeof(float)) {
av_log(avctx, AV_LOG_ERROR,
"Error processing packet: output buffer (%d) too small\n",
*data_size);
@@ -542,12 +562,16 @@ static int sipr_decode_frame(AVCodecContext *avctx, void *datap,
for (i = 0; i < mode_par->frames_per_packet; i++) {
decode_parameters(&parm, &gb, mode_par);
decode_frame(ctx, &parm, data);
data += SUBFR_SIZE * mode_par->subframe_count;
if (ctx->mode == MODE_16k)
ff_sipr_decode_frame_16k(ctx, &parm, data);
else
decode_frame(ctx, &parm, data);
data += subframe_size * mode_par->subframe_count;
}
*data_size = mode_par->frames_per_packet * SUBFR_SIZE *
*data_size = mode_par->frames_per_packet * subframe_size *
mode_par->subframe_count * sizeof(float);
return mode_par->bits_per_frame >> 3;