virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-23 12:43:46 +02:00
Code Issues Releases Activity

pcm-mpeg: implement new audio decoding api

Browse Source 
Signed-off-by: Justin Ruggles <justin.ruggles@gmail.com>
This commit is contained in:
Hendrik Leppkes 2011-12-04 23:15:51 +01:00 committed by Justin Ruggles
parent 8b03d7fe95
commit bc057f7592
1 changed files with 35 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
libavcodec/pcm-mpeg.c
View File

@ -119,17 +119,30 @@ static int pcm_bluray_parse_header(AVCodecContext *avctx,
return 0;
}
static int pcm_bluray_decode_frame(AVCodecContext *avctx,
void *data,
int *data_size,
AVPacket *avpkt)
typedef struct PCMBRDecode {
AVFrame frame;
} PCMBRDecode;
static av_cold int pcm_bluray_decode_init(AVCodecContext * avctx)
{
PCMBRDecode *s = avctx->priv_data;
avcodec_get_frame_defaults(&s->frame);
avctx->coded_frame = &s->frame;
return 0;
}
static int pcm_bluray_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame_ptr, AVPacket *avpkt)
{
const uint8_t *src = avpkt->data;
int buf_size = avpkt->size;
PCMBRDecode *s = avctx->priv_data;
int num_source_channels, channel, retval;
int sample_size, samples, output_size;
int16_t *dst16 = data;
int32_t *dst32 = data;
int sample_size, samples;
int16_t *dst16;
int32_t *dst32;
if (buf_size < 4) {
av_log(avctx, AV_LOG_ERROR, "PCM packet too small\n");
@ -146,15 +159,14 @@ static int pcm_bluray_decode_frame(AVCodecContext *avctx,
sample_size = (num_source_channels * avctx->bits_per_coded_sample) >> 3;
samples = buf_size / sample_size;
output_size = samples * avctx->channels *
(avctx->sample_fmt == AV_SAMPLE_FMT_S32 ? 4 : 2);
if (output_size > *data_size) {
av_log(avctx, AV_LOG_ERROR,
"Insufficient output buffer space (%d bytes, needed %d bytes)\n",
*data_size, output_size);
return -1;
/* get output buffer */
s->frame.nb_samples = samples;
if ((retval = avctx->get_buffer(avctx, &s->frame)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return retval;
}
*data_size = output_size;
dst16 = (int16_t *)s->frame.data[0];
dst32 = (int32_t *)s->frame.data[0];
if (samples) {
switch (avctx->channel_layout) {
@ -165,7 +177,7 @@ static int pcm_bluray_decode_frame(AVCodecContext *avctx,
samples *= num_source_channels;
if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
#if HAVE_BIGENDIAN
memcpy(dst16, src, output_size);
memcpy(dst16, src, buf_size);
#else
do {
*dst16++ = bytestream_get_be16(&src);
@ -289,10 +301,13 @@ static int pcm_bluray_decode_frame(AVCodecContext *avctx,
}
}
*got_frame_ptr = 1;
*(AVFrame *)data = s->frame;
retval = src - avpkt->data;
if (avctx->debug & FF_DEBUG_BITSTREAM)
av_dlog(avctx, "pcm_bluray_decode_frame: decoded %d -> %d bytes\n",
retval, *data_size);
retval, buf_size);
return retval;
}
@ -300,7 +315,10 @@ AVCodec ff_pcm_bluray_decoder = {
.name = "pcm_bluray",
.type = AVMEDIA_TYPE_AUDIO,
.id = CODEC_ID_PCM_BLURAY,
.priv_data_size = sizeof(PCMBRDecode),
.init = pcm_bluray_decode_init,
.decode = pcm_bluray_decode_frame,
.capabilities = CODEC_CAP_DR1,
.sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32,
AV_SAMPLE_FMT_NONE},
.long_name = NULL_IF_CONFIG_SMALL("PCM signed 16|20|24-bit big-endian for Blu-ray media"),