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Code Issues Releases Activity

pcm: decode directly to the user-provided AVFrame

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This commit is contained in:
Justin Ruggles 2012-12-23 17:10:12 -05:00
parent 5cc0bd2cb4
commit a6bb39add2
1 changed files with 8 additions and 12 deletions
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20
libavcodec/pcm.c
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@ -199,7 +199,6 @@ static int pcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
} }
typedef struct PCMDecode { typedef struct PCMDecode {
AVFrame frame;
short table[256]; short table[256];
} PCMDecode; } PCMDecode;
@ -231,9 +230,6 @@ static av_cold int pcm_decode_init(AVCodecContext *avctx)
if (avctx->sample_fmt == AV_SAMPLE_FMT_S32) if (avctx->sample_fmt == AV_SAMPLE_FMT_S32)
avctx->bits_per_raw_sample = av_get_bits_per_sample(avctx->codec->id); avctx->bits_per_raw_sample = av_get_bits_per_sample(avctx->codec->id);
avcodec_get_frame_defaults(&s->frame);
avctx->coded_frame = &s->frame;
return 0; return 0;
} }
@ -260,6 +256,7 @@ static int pcm_decode_frame(AVCodecContext *avctx, void *data,
const uint8_t *src = avpkt->data; const uint8_t *src = avpkt->data;
int buf_size = avpkt->size; int buf_size = avpkt->size;
PCMDecode *s = avctx->priv_data; PCMDecode *s = avctx->priv_data;
AVFrame *frame = data;
int sample_size, c, n, ret, samples_per_block; int sample_size, c, n, ret, samples_per_block;
uint8_t *samples; uint8_t *samples;
int32_t *dst_int32_t; int32_t *dst_int32_t;
@ -301,12 +298,12 @@ static int pcm_decode_frame(AVCodecContext *avctx, void *data,
n = buf_size / sample_size; n = buf_size / sample_size;
/* get output buffer */ /* get output buffer */
s->frame.nb_samples = n * samples_per_block / avctx->channels; frame->nb_samples = n * samples_per_block / avctx->channels;
if ((ret = ff_get_buffer(avctx, &s->frame)) < 0) { if ((ret = ff_get_buffer(avctx, frame)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return ret; return ret;
} }
samples = s->frame.data[0]; samples = frame->data[0];
switch (avctx->codec->id) { switch (avctx->codec->id) {
case AV_CODEC_ID_PCM_U32LE: case AV_CODEC_ID_PCM_U32LE:
@ -341,7 +338,7 @@ static int pcm_decode_frame(AVCodecContext *avctx, void *data,
int av_unused n2; int av_unused n2;
n /= avctx->channels; n /= avctx->channels;
for (c = 0; c < avctx->channels; c++) { for (c = 0; c < avctx->channels; c++) {
samples = s->frame.extended_data[c]; samples = frame->extended_data[c];
#if HAVE_BIGENDIAN #if HAVE_BIGENDIAN
n2 = n; n2 = n;
DECODE(16, le16, src, samples, n2, 0, 0) DECODE(16, le16, src, samples, n2, 0, 0)
@ -414,7 +411,7 @@ static int pcm_decode_frame(AVCodecContext *avctx, void *data,
case AV_CODEC_ID_PCM_DVD: case AV_CODEC_ID_PCM_DVD:
{ {
const uint8_t *src8; const uint8_t *src8;
dst_int32_t = (int32_t *)s->frame.data[0]; dst_int32_t = (int32_t *)frame->data[0];
n /= avctx->channels; n /= avctx->channels;
switch (avctx->bits_per_coded_sample) { switch (avctx->bits_per_coded_sample) {
case 20: case 20:
@ -447,7 +444,7 @@ static int pcm_decode_frame(AVCodecContext *avctx, void *data,
int i; int i;
n /= avctx->channels; n /= avctx->channels;
for (c = 0; c < avctx->channels; c++) { for (c = 0; c < avctx->channels; c++) {
dst_int32_t = (int32_t *)s->frame.extended_data[c]; dst_int32_t = (int32_t *)frame->extended_data[c];
for (i = 0; i < n; i++) { for (i = 0; i < n; i++) {
// extract low 20 bits and expand to 32 bits // extract low 20 bits and expand to 32 bits
*dst_int32_t++ = (src[2] << 28) | *dst_int32_t++ = (src[2] << 28) |
@ -470,8 +467,7 @@ static int pcm_decode_frame(AVCodecContext *avctx, void *data,
return -1; return -1;
} }
*got_frame_ptr = 1; *got_frame_ptr = 1;
*(AVFrame *)data = s->frame;
return buf_size; return buf_size;
} }