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authorVladimir Voroshilov <voroshil@gmail.com>2008-09-17 06:05:12 +0000
committerVladimir Voroshilov <voroshil@gmail.com>2008-09-17 06:05:12 +0000
commit1a18912e491c55dcf6d3b10ed72ae041053ccca8 (patch)
tree7cdfcdcc90dd6d71077d589ef62a3274162b8aef /libavcodec/g729dec.c
parentaac0eda40754c010ab5156dcd5d0d1554937e9a7 (diff)
downloadffmpeg-1a18912e491c55dcf6d3b10ed72ae041053ccca8.tar.gz
Another set of approved changes for G.729: includes, formats structure,
several parts of main decoding routine and initialization code. Originally committed as revision 15341 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/g729dec.c')
-rw-r--r--libavcodec/g729dec.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/libavcodec/g729dec.c b/libavcodec/g729dec.c
index e8656bca5c..6bd814f478 100644
--- a/libavcodec/g729dec.c
+++ b/libavcodec/g729dec.c
@@ -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",