* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-
+
/**
* @file mp3lameaudio.c
* Interface to libmp3lame for mp3 encoding.
#define BUFFER_SIZE (2*MPA_FRAME_SIZE)
typedef struct Mp3AudioContext {
- lame_global_flags *gfp;
- int stereo;
+ lame_global_flags *gfp;
+ int stereo;
uint8_t buffer[BUFFER_SIZE];
int buffer_index;
} Mp3AudioContext;
static int MP3lame_encode_init(AVCodecContext *avctx)
{
- Mp3AudioContext *s = avctx->priv_data;
-
- if (avctx->channels > 2)
- return -1;
-
- s->stereo = avctx->channels > 1 ? 1 : 0;
-
- if ((s->gfp = lame_init()) == NULL)
- goto err;
- lame_set_in_samplerate(s->gfp, avctx->sample_rate);
- lame_set_out_samplerate(s->gfp, avctx->sample_rate);
- lame_set_num_channels(s->gfp, avctx->channels);
- /* lame 3.91 dies on quality != 5 */
- lame_set_quality(s->gfp, 5);
- /* lame 3.91 doesn't work in mono */
- lame_set_mode(s->gfp, JOINT_STEREO);
- lame_set_brate(s->gfp, avctx->bit_rate/1000);
+ Mp3AudioContext *s = avctx->priv_data;
+
+ if (avctx->channels > 2)
+ return -1;
+
+ s->stereo = avctx->channels > 1 ? 1 : 0;
+
+ if ((s->gfp = lame_init()) == NULL)
+ goto err;
+ lame_set_in_samplerate(s->gfp, avctx->sample_rate);
+ lame_set_out_samplerate(s->gfp, avctx->sample_rate);
+ lame_set_num_channels(s->gfp, avctx->channels);
+ /* lame 3.91 dies on quality != 5 */
+ lame_set_quality(s->gfp, 5);
+ /* lame 3.91 doesn't work in mono */
+ lame_set_mode(s->gfp, JOINT_STEREO);
+ lame_set_brate(s->gfp, avctx->bit_rate/1000);
if(avctx->flags & CODEC_FLAG_QSCALE) {
lame_set_brate(s->gfp, 0);
lame_set_VBR(s->gfp, vbr_default);
lame_set_VBR_q(s->gfp, avctx->global_quality / (float)FF_QP2LAMBDA);
}
lame_set_bWriteVbrTag(s->gfp,0);
- if (lame_init_params(s->gfp) < 0)
- goto err_close;
+ if (lame_init_params(s->gfp) < 0)
+ goto err_close;
+
+ avctx->frame_size = lame_get_framesize(s->gfp);
- avctx->frame_size = lame_get_framesize(s->gfp);
-
avctx->coded_frame= avcodec_alloc_frame();
avctx->coded_frame->key_frame= 1;
- return 0;
+ return 0;
err_close:
- lame_close(s->gfp);
+ lame_close(s->gfp);
err:
- return -1;
+ return -1;
}
static const int sSampleRates[3] = {
if ( (( header >> 21 ) & 0x7ff) != 0x7ff || mode == 3 || layerID==3 || sampleRateID==3) {
return -1;
}
-
+
if(!samplesPerFrame) samplesPerFrame= &temp0;
if(!sampleRate ) sampleRate = &temp1;
bitRate = sBitRates[mpeg_id][layerID][bitRateID] * 1000;
*samplesPerFrame = sSamplesPerFrame[mpeg_id][layerID];
//av_log(NULL, AV_LOG_DEBUG, "sr:%d br:%d spf:%d l:%d m:%d\n", *sampleRate, bitRate, *samplesPerFrame, layerID, mode);
-
+
return *samplesPerFrame * bitRate / (bitsPerSlot * *sampleRate) + isPadded;
}
int MP3lame_encode_frame(AVCodecContext *avctx,
unsigned char *frame, int buf_size, void *data)
{
- Mp3AudioContext *s = avctx->priv_data;
- int len;
- int lame_result;
+ Mp3AudioContext *s = avctx->priv_data;
+ int len;
+ int lame_result;
- /* lame 3.91 dies on '1-channel interleaved' data */
+ /* lame 3.91 dies on '1-channel interleaved' data */
if(data){
if (s->stereo) {
lame_result = lame_encode_buffer_interleaved(
- s->gfp,
+ s->gfp,
data,
- avctx->frame_size,
- s->buffer + s->buffer_index,
+ avctx->frame_size,
+ s->buffer + s->buffer_index,
BUFFER_SIZE - s->buffer_index
);
} else {
lame_result = lame_encode_buffer(
- s->gfp,
- data,
- data,
+ s->gfp,
+ data,
+ data,
avctx->frame_size,
- s->buffer + s->buffer_index,
+ s->buffer + s->buffer_index,
BUFFER_SIZE - s->buffer_index
);
}
}else{
lame_result= lame_encode_flush(
- s->gfp,
- s->buffer + s->buffer_index,
+ s->gfp,
+ s->buffer + s->buffer_index,
BUFFER_SIZE - s->buffer_index
);
}
int MP3lame_encode_close(AVCodecContext *avctx)
{
- Mp3AudioContext *s = avctx->priv_data;
-
+ Mp3AudioContext *s = avctx->priv_data;
+
av_freep(&avctx->coded_frame);
- lame_close(s->gfp);
- return 0;
+ lame_close(s->gfp);
+ return 0;
}