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comfortnoise: decode directly to the user-provided AVFrame

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This commit is contained in:
Justin Ruggles 2012-12-23 17:37:34 -05:00
parent e42e5a89d6
commit cddf8998f1
1 changed files with 5 additions and 9 deletions
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14
libavcodec/cngdec.c
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@ -28,7 +28,6 @@
#include "libavutil/lfg.h"
typedef struct CNGContext {
AVFrame avframe;
float *refl_coef, *target_refl_coef;
float *lpc_coef;
int order;
@ -58,8 +57,6 @@ static av_cold int cng_decode_init(AVCodecContext *avctx)
avctx->channels = 1;
avctx->sample_rate = 8000;
avcodec_get_frame_defaults(&p->avframe);
avctx->coded_frame = &p->avframe;
p->order = 12;
avctx->frame_size = 640;
p->refl_coef = av_mallocz(p->order * sizeof(*p->refl_coef));
@ -105,7 +102,7 @@ static void cng_decode_flush(AVCodecContext *avctx)
static int cng_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame_ptr, AVPacket *avpkt)
{
AVFrame *frame = data;
CNGContext *p = avctx->priv_data;
int buf_size = avpkt->size;
int ret, i;
@ -144,19 +141,18 @@ static int cng_decode_frame(AVCodecContext *avctx, void *data,
ff_celp_lp_synthesis_filterf(p->filter_out + p->order, p->lpc_coef,
p->excitation, avctx->frame_size, p->order);
p->avframe.nb_samples = avctx->frame_size;
if ((ret = ff_get_buffer(avctx, &p->avframe)) < 0) {
frame->nb_samples = avctx->frame_size;
if ((ret = ff_get_buffer(avctx, frame)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return ret;
}
buf_out = (int16_t *)p->avframe.data[0];
buf_out = (int16_t *)frame->data[0];
for (i = 0; i < avctx->frame_size; i++)
buf_out[i] = p->filter_out[i + p->order];
memcpy(p->filter_out, p->filter_out + avctx->frame_size,
p->order * sizeof(*p->filter_out));
*got_frame_ptr = 1;
*(AVFrame *)data = p->avframe;
*got_frame_ptr = 1;
return buf_size;
}