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32bit libmp3lame support.

This commit is contained in:
Peter Belkner 2011-04-19 12:00:01 +02:00 committed by Michael Niedermayer
parent 22fa406f38
commit 39e69d0b88
1 changed files with 62 additions and 8 deletions
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70
libavcodec/libmp3lame.c
View File

@ -34,6 +34,10 @@ typedef struct Mp3AudioContext {
int stereo;
uint8_t buffer[BUFFER_SIZE];
int buffer_index;
struct {
int *left;
int *right;
} s32_data;
} Mp3AudioContext;
static av_cold int MP3lame_encode_init(AVCodecContext *avctx)
@ -76,6 +80,19 @@ static av_cold int MP3lame_encode_init(AVCodecContext *avctx)
}
avctx->coded_frame->key_frame= 1;
if(AV_SAMPLE_FMT_S32 == avctx->sample_fmt && s->stereo) {
int nelem = 2 * avctx->frame_size;
if(! (s->s32_data.left = av_malloc(nelem * sizeof(int)))) {
av_freep(&avctx->coded_frame);
lame_close(s->gfp);
return AVERROR(ENOMEM);
}
s->s32_data.right = s->s32_data.left + avctx->frame_size;
}
return 0;
err_close:
@ -150,7 +167,45 @@ static int MP3lame_encode_frame(AVCodecContext *avctx,
/* lame 3.91 dies on '1-channel interleaved' data */
if(data){
if(!data){
lame_result= lame_encode_flush(
s->gfp,
s->buffer + s->buffer_index,
BUFFER_SIZE - s->buffer_index
);
#if 2147483647 == INT_MAX
}else if(AV_SAMPLE_FMT_S32 == avctx->sample_fmt){
if (s->stereo) {
int32_t *rp = data;
int32_t *mp = rp + 2*avctx->frame_size;
int *wpl = s->s32_data.left;
int *wpr = s->s32_data.right;
while (rp < mp) {
*wpl++ = *rp++;
*wpr++ = *rp++;
}
lame_result = lame_encode_buffer_int(
s->gfp,
s->s32_data.left,
s->s32_data.right,
avctx->frame_size,
s->buffer + s->buffer_index,
BUFFER_SIZE - s->buffer_index
);
} else {
lame_result = lame_encode_buffer_int(
s->gfp,
data,
data,
avctx->frame_size,
s->buffer + s->buffer_index,
BUFFER_SIZE - s->buffer_index
);
}
#endif
}else{
if (s->stereo) {
lame_result = lame_encode_buffer_interleaved(
s->gfp,
@ -169,12 +224,6 @@ static int MP3lame_encode_frame(AVCodecContext *avctx,
BUFFER_SIZE - s->buffer_index
);
}
}else{
lame_result= lame_encode_flush(
s->gfp,
s->buffer + s->buffer_index,
BUFFER_SIZE - s->buffer_index
);
}
if(lame_result < 0){
@ -210,6 +259,7 @@ static av_cold int MP3lame_encode_close(AVCodecContext *avctx)
{
Mp3AudioContext *s = avctx->priv_data;
av_freep(&s->s32_data.left);
av_freep(&avctx->coded_frame);
lame_close(s->gfp);
@ -226,7 +276,11 @@ AVCodec ff_libmp3lame_encoder = {
MP3lame_encode_frame,
MP3lame_encode_close,
.capabilities= CODEC_CAP_DELAY,
.sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16,AV_SAMPLE_FMT_NONE},
.sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16,
#if 2147483647 == INT_MAX
AV_SAMPLE_FMT_S32,
#endif
AV_SAMPLE_FMT_NONE},
.supported_samplerates= sSampleRates,
.long_name= NULL_IF_CONFIG_SMALL("libmp3lame MP3 (MPEG audio layer 3)"),
};