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okayed chunks of AAC encoder 

Originally committed as revision 14939 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Kostya Shishkov 2008-08-24 05:56:23 +00:00
parent 6986662b5f
commit e43b0a7316
1 changed files with 22 additions and 8 deletions
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30
libavcodec/aacenc.c
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@ -28,6 +28,7 @@
* TODOs:
* psy model selection with some option
* add sane pulse detection
* add temporal noise shaping
***********************************/
#include "avcodec.h"
@ -211,10 +212,6 @@ static av_cold int aac_encode_init(AVCodecContext *avctx)
return -1;
}
s->samplerate_index = i;
s->swb_sizes1024 = swb_size_1024[i];
s->swb_num1024 = ff_aac_num_swb_1024[i];
s->swb_sizes128 = swb_size_128[i];
s->swb_num128 = ff_aac_num_swb_128[i];
dsputil_init(&s->dsp, avctx);
ff_mdct_init(&s->mdct1024, 11, 0);
@ -229,7 +226,7 @@ static av_cold int aac_encode_init(AVCodecContext *avctx)
s->cpe = av_mallocz(sizeof(ChannelElement) * aac_chan_configs[avctx->channels-1][0]);
if(ff_aac_psy_init(&s->psy, avctx, AAC_PSY_3GPP,
aac_chan_configs[avctx->channels-1][0], 0,
s->swb_sizes1024, s->swb_num1024, s->swb_sizes128, s->swb_num128) < 0){
swb_size_1024[i], ff_aac_num_swb_1024[i], swb_size_128[i], ff_aac_num_swb_128[i]) < 0){
av_log(avctx, AV_LOG_ERROR, "Cannot initialize selected model.\n");
return -1;
}
@ -243,9 +240,8 @@ static av_cold int aac_encode_init(AVCodecContext *avctx)
* Encode ics_info element.
* @see Table 4.6 (syntax of ics_info)
*/
static void put_ics_info(AVCodecContext *avctx, IndividualChannelStream *info)
static void put_ics_info(AACEncContext *s, IndividualChannelStream *info)
{
AACEncContext *s = avctx->priv_data;
int i;
put_bits(&s->pb, 1, 0); // ics_reserved bit
@ -261,6 +257,24 @@ static void put_ics_info(AVCodecContext *avctx, IndividualChannelStream *info)
}
}
/**
* Calculate the number of bits needed to code all coefficient signs in current band.
*/
static int calculate_band_sign_bits(AACEncContext *s, SingleChannelElement *sce,
int group_len, int start, int size)
{
int bits = 0;
int i, w;
for(w = 0; w < group_len; w++){
for(i = 0; i < size; i++){
if(sce->icoefs[start + i])
bits++;
}
start += 128;
}
return bits;
}
/**
* Encode pulse data.
*/
@ -295,7 +309,7 @@ static void encode_spectral_coeffs(AACEncContext *s, SingleChannelElement *sce)
continue;
}
for(w2 = w; w2 < w + sce->ics.group_len[wg]; w2++){
encode_band_coeffs(s, cpe, channel, start + w2*128,
encode_band_coeffs(s, sce, start + w2*128,
sce->ics.swb_sizes[i],
sce->band_type[w*16 + i]);
}