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More OKed parts of the QCELP decoder

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patch by Kenan Gillet, kenan.gillet gmail com

Originally committed as revision 15797 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Kenan Gillet 2008-11-09 12:00:47 +00:00 committed by Vitor Sessak
parent 3d4fc61064
commit 2ae1a9b264
2 changed files with 79 additions and 0 deletions
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50
libavcodec/qcelpdata.h
View File

@ -378,4 +378,54 @@ static const qcelp_vector * const qcelp_lspvq[5] = {
qcelp_lspvq5 qcelp_lspvq5
}; };
/**
* circular codebook for rate 1 frames in x*100 form
*
* TIA/EIA/IS-733 2.4.6.1-2
*/
static const int16_t qcelp_rate_full_codebook[128] = {
10, -65, -59, 12, 110, 34, -134, 157,
104, -84, -34, -115, 23, -101, 3, 45,
-101, -16, -59, 28, -45, 134, -67, 22,
61, -29, 226, -26, -55, -179, 157, -51,
-220, -93, -37, 60, 118, 74, -48, -95,
-181, 111, 36, -52, -215, 78, -112, 39,
-17, -47, -223, 19, 12, -98, -142, 130,
54, -127, 21, -12, 39, -48, 12, 128,
6, -167, 82, -102, -79, 55, -44, 48,
-20, -53, 8, -61, 11, -70, -157, -168,
20, -56, -74, 78, 33, -63, -173, -2,
-75, -53, -146, 77, 66, -29, 9, -75,
65, 119, -43, 76, 233, 98, 125, -156,
-27, 78, -9, 170, 176, 143, -148, -7,
27, -136, 5, 27, 18, 139, 204, 7,
-184, -197, 52, -3, 78, -189, 8, -65
};
#define QCELP_RATE_FULL_CODEBOOK_RATIO .01
/**
* circular codebook for rate 1/2 frames in x*2 form
*
* TIA/EIA/IS-733 2.4.6.1-1
*/
static const int8_t qcelp_rate_half_codebook[128] = {
0, -4, 0, -3, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, -3, -2, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 5,
0, 0, 0, 0, 0, 0, 4, 0,
0, 3, 2, 0, 3, 4, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 3, 0, 0,
-3, 3, 0, 0, -2, 0, 3, 0,
0, 0, 0, 0, 0, 0, -5, 0,
0, 0, 0, 3, 0, 0, 0, 3,
0, 0, 0, 0, 0, 0, 0, 4,
0, 0, 0, 0, 0, 0, 0, 0,
0, 3, 6, -3, -4, 0, -3, -3,
3, -3, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0
};
#define QCELP_RATE_HALF_CODEBOOK_RATIO 0.5
#endif /* AVCODEC_QCELPDATA_H */ #endif /* AVCODEC_QCELPDATA_H */

29
libavcodec/qcelpdec.c
View File

@ -38,6 +38,19 @@
#undef NDEBUG #undef NDEBUG
#include <assert.h> #include <assert.h>
static void weighted_vector_sumf(float *out,
const float *in_a,
const float *in_b,
float weight_coeff_a,
float weight_coeff_b,
int length) {
int i;
for (i = 0; i < length; i++)
out[i] = weight_coeff_a * in_a[i]
+ weight_coeff_b * in_b[i];
}
/** /**
* Apply filter in pitch-subframe steps. * Apply filter in pitch-subframe steps.
* *
@ -90,6 +103,22 @@ static const float *do_pitchfilter(float memory[303],
return memory + 143; return memory + 143;
} }
static int buf_size2framerate(const int buf_size) {
switch (buf_size) {
case 35:
return RATE_FULL;
case 17:
return RATE_HALF;
case 8:
return RATE_QUARTER;
case 4:
return RATE_OCTAVE;
case 1:
return SILENCE;
}
return -1;
}
static void warn_insufficient_frame_quality(AVCodecContext *avctx, static void warn_insufficient_frame_quality(AVCodecContext *avctx,
const char *message) { const char *message) {
av_log(avctx, AV_LOG_WARNING, "Frame #%d, IFQ: %s\n", avctx->frame_number, message); av_log(avctx, AV_LOG_WARNING, "Frame #%d, IFQ: %s\n", avctx->frame_number, message);