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Another set of approved changes for G.729: includes, formats structure,

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several parts of main decoding routine and initialization code.

Originally committed as revision 15341 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Vladimir Voroshilov 2008-09-17 06:05:12 +00:00
parent aac0eda407
commit 1a18912e49
1 changed files with 45 additions and 0 deletions
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45
libavcodec/g729dec.c
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@ -30,6 +30,14 @@
#include "libavutil/avutil.h"
#include "bitstream.h"
#include "g729.h"
#include "lsp.h"
#include "acelp_math.h"
#include "acelp_filters.h"
#include "acelp_pitch_delay.h"
#include "acelp_vectors.h"
#include "g729data.h"
/**
* minimum quantized LSF value (3.2.4)
* 0.005 in Q13
@ -63,6 +71,17 @@
*/
#define SHARP_MAX 13017
typedef struct
{
int sample_rate;
uint8_t packed_frame_size; ///< input frame size(in bytes)
uint8_t unpacked_frame_size;///< output frame size (in bytes)
uint8_t fc_indexes_bits; ///< size (in bits) of fixed-codebook index entry
/// mr_energy = mean_energy + 10 * log10(2^26 * subframe_size) in (7.13)
int mr_energy;
} G729_format_description;
/**
* \brief pseudo random number generator
*/
@ -79,6 +98,12 @@ static inline int g729_get_parity(uint8_t value)
return (0x6996966996696996ULL >> (value >> 2)) & 1;
}
if(avctx->channels != 1)
{
av_log(avctx, AV_LOG_ERROR, "Only mono sound is supported (requested channels: %d).\n", avctx->channels);
return AVERROR_NOFMT;
}
ff_acelp_weighted_vector_sum(
fc + pitch_delay_int[i],
fc + pitch_delay_int[i],
@ -89,6 +114,15 @@ static inline int g729_get_parity(uint8_t value)
14,
ctx->subframe_size - pitch_delay_int[i]);
if(ctx->frame_erasure)
{
ctx->gain_pitch = (29491 * ctx->gain_pitch) >> 15; // 0.9 (0.15)
ctx->gain_code = (2007 * ctx->gain_code) >> 11; // 0.98 in (0.11)
gain_corr_factor = 0;
}
else
{
ctx->gain_pitch = cb_gain_1st_8k[parm->gc_1st_index[i]][0] +
cb_gain_2nd_8k[parm->gc_2nd_index[i]][0];
gain_corr_factor = cb_gain_1st_8k[parm->gc_1st_index[i]][1] +
@ -104,6 +138,17 @@ static inline int g729_get_parity(uint8_t value)
14,
ctx->subframe_size);
if (buf_size<packed_frame_size)
{
av_log(avctx, AV_LOG_ERROR, "Error processing packet: packet size too small\n");
return AVERROR(EIO);
}
if (*data_size<unpacked_frame_size)
{
av_log(avctx, AV_LOG_ERROR, "Error processing packet: output buffer too small\n");
return AVERROR(EIO);
}
AVCodec g729_decoder =
{
"g729",