MrBesen/ffmpeg
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

apedec: 8bit and 24bit support

Browse Source 
Signed-off-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Justin Ruggles <justin.ruggles@gmail.com>
This commit is contained in:
Paul B Mahol 2012-02-03 15:37:06 +00:00 committed by Justin Ruggles
parent 6f1a5e8d6b
commit b60620bf7e
1 changed files with 45 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

56
libavcodec/apedec.c
View File

@ -131,6 +131,7 @@ typedef struct APEContext {
DSPContext dsp;
int channels;
int samples; ///< samples left to decode in current frame
int bps;
int fileversion; ///< codec version, very important in decoding process
int compression_level; ///< compression levels
@ -184,14 +185,26 @@ static av_cold int ape_decode_init(AVCodecContext *avctx)
av_log(avctx, AV_LOG_ERROR, "Incorrect extradata\n");
return AVERROR(EINVAL);
}
if (avctx->bits_per_coded_sample != 16) {
av_log(avctx, AV_LOG_ERROR, "Only 16-bit samples are supported\n");
return AVERROR(EINVAL);
}
if (avctx->channels > 2) {
av_log(avctx, AV_LOG_ERROR, "Only mono and stereo is supported\n");
return AVERROR(EINVAL);
}
s->bps = avctx->bits_per_coded_sample;
switch (s->bps) {
case 8:
avctx->sample_fmt = AV_SAMPLE_FMT_U8;
break;
case 16:
avctx->sample_fmt = AV_SAMPLE_FMT_S16;
break;
case 24:
avctx->sample_fmt = AV_SAMPLE_FMT_S32;
break;
default:
av_log_ask_for_sample(avctx, "Unsupported bits per coded sample %d\n",
s->bps);
return AVERROR_PATCHWELCOME;
}
s->avctx = avctx;
s->channels = avctx->channels;
s->fileversion = AV_RL16(avctx->extradata);
@ -215,7 +228,6 @@ static av_cold int ape_decode_init(AVCodecContext *avctx)
}
dsputil_init(&s->dsp, avctx);
avctx->sample_fmt = AV_SAMPLE_FMT_S16;
avctx->channel_layout = (avctx->channels==2) ? AV_CH_LAYOUT_STEREO : AV_CH_LAYOUT_MONO;
avcodec_get_frame_defaults(&s->frame);
@ -816,7 +828,9 @@ static int ape_decode_frame(AVCodecContext *avctx, void *data,
{
const uint8_t *buf = avpkt->data;
APEContext *s = avctx->priv_data;
int16_t *samples;
uint8_t *sample8;
int16_t *sample16;
int32_t *sample24;
int i, ret;
int blockstodecode;
int bytes_used = 0;
@ -894,7 +908,6 @@ static int ape_decode_frame(AVCodecContext *avctx, void *data,
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return ret;
}
samples = (int16_t *)s->frame.data[0];
s->error=0;
@ -910,10 +923,31 @@ static int ape_decode_frame(AVCodecContext *avctx, void *data,
return AVERROR_INVALIDDATA;
}
for (i = 0; i < blockstodecode; i++) {
*samples++ = s->decoded0[i];
if(s->channels == 2)
*samples++ = s->decoded1[i];
switch (s->bps) {
case 8:
sample8 = (uint8_t *)s->frame.data[0];
for (i = 0; i < blockstodecode; i++) {
*sample8++ = (s->decoded0[i] + 0x80) & 0xff;
if (s->channels == 2)
*sample8++ = (s->decoded1[i] + 0x80) & 0xff;
}
break;
case 16:
sample16 = (int16_t *)s->frame.data[0];
for (i = 0; i < blockstodecode; i++) {
*sample16++ = s->decoded0[i];
if (s->channels == 2)
*sample16++ = s->decoded1[i];
}
break;
case 24:
sample24 = (int32_t *)s->frame.data[0];
for (i = 0; i < blockstodecode; i++) {
*sample24++ = s->decoded0[i] << 8;
if (s->channels == 2)
*sample24++ = s->decoded1[i] << 8;
}
break;
}
s->samples -= blockstodecode;