2002-03-10 15:52:00 +01:00
|
|
|
/*
|
|
|
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* Interface to libmp3lame for mp3 encoding
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|
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* Copyright (c) 2002 Lennert Buytenhek <buytenh@gnu.org>
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*
|
2011-03-18 18:35:10 +01:00
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* This file is part of Libav.
|
2006-10-07 17:30:46 +02:00
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*
|
2011-03-18 18:35:10 +01:00
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* Libav is free software; you can redistribute it and/or
|
2002-05-26 00:45:33 +02:00
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
|
2006-10-07 17:30:46 +02:00
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* version 2.1 of the License, or (at your option) any later version.
|
2002-03-10 15:52:00 +01:00
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*
|
2011-03-18 18:35:10 +01:00
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* Libav is distributed in the hope that it will be useful,
|
2002-03-10 15:52:00 +01:00
|
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
2002-05-26 00:45:33 +02:00
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
|
2002-03-10 15:52:00 +01:00
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*
|
2002-05-26 00:45:33 +02:00
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* You should have received a copy of the GNU Lesser General Public
|
2011-03-18 18:35:10 +01:00
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|
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* License along with Libav; if not, write to the Free Software
|
2006-01-12 23:43:26 +01:00
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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2002-03-10 15:52:00 +01:00
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*/
|
2005-12-17 19:14:38 +01:00
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2003-03-06 12:32:04 +01:00
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/**
|
2010-04-20 16:45:34 +02:00
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* @file
|
2003-03-06 12:32:04 +01:00
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|
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* Interface to libmp3lame for mp3 encoding.
|
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*/
|
2002-03-10 15:52:00 +01:00
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2012-02-17 06:04:54 +01:00
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|
|
#include <lame/lame.h>
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|
|
|
2012-11-10 16:00:00 +01:00
|
|
|
#include "libavutil/channel_layout.h"
|
2012-08-06 15:49:32 +02:00
|
|
|
#include "libavutil/common.h"
|
2012-09-23 00:13:57 +02:00
|
|
|
#include "libavutil/float_dsp.h"
|
2011-05-20 20:56:44 +02:00
|
|
|
#include "libavutil/intreadwrite.h"
|
2011-08-27 10:09:09 +02:00
|
|
|
#include "libavutil/log.h"
|
|
|
|
#include "libavutil/opt.h"
|
2002-03-10 15:52:00 +01:00
|
|
|
#include "avcodec.h"
|
2012-02-19 19:16:34 +01:00
|
|
|
#include "audio_frame_queue.h"
|
2012-02-17 05:28:38 +01:00
|
|
|
#include "internal.h"
|
2002-03-10 15:52:00 +01:00
|
|
|
#include "mpegaudio.h"
|
2012-02-17 05:06:54 +01:00
|
|
|
#include "mpegaudiodecheader.h"
|
2002-03-10 15:52:00 +01:00
|
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|
|
2011-12-29 22:19:55 +01:00
|
|
|
#define BUFFER_SIZE (7200 + 2 * MPA_FRAME_SIZE + MPA_FRAME_SIZE / 4)
|
2012-02-17 06:04:54 +01:00
|
|
|
|
|
|
|
typedef struct LAMEContext {
|
2011-08-27 10:09:09 +02:00
|
|
|
AVClass *class;
|
2012-02-17 07:50:57 +01:00
|
|
|
AVCodecContext *avctx;
|
2006-11-01 22:09:14 +01:00
|
|
|
lame_global_flags *gfp;
|
2012-10-16 20:07:04 +02:00
|
|
|
uint8_t *buffer;
|
2006-11-01 22:09:14 +01:00
|
|
|
int buffer_index;
|
2012-10-16 20:07:04 +02:00
|
|
|
int buffer_size;
|
2011-08-27 10:09:09 +02:00
|
|
|
int reservoir;
|
2012-08-22 18:23:21 +02:00
|
|
|
float *samples_flt[2];
|
2012-02-19 19:16:34 +01:00
|
|
|
AudioFrameQueue afq;
|
2012-09-23 00:13:57 +02:00
|
|
|
AVFloatDSPContext fdsp;
|
2012-02-17 06:04:54 +01:00
|
|
|
} LAMEContext;
|
2002-03-10 15:52:00 +01:00
|
|
|
|
2012-02-17 04:12:03 +01:00
|
|
|
|
2012-10-16 20:07:04 +02:00
|
|
|
static int realloc_buffer(LAMEContext *s)
|
|
|
|
{
|
|
|
|
if (!s->buffer || s->buffer_size - s->buffer_index < BUFFER_SIZE) {
|
|
|
|
uint8_t *tmp;
|
|
|
|
int new_size = s->buffer_index + 2 * BUFFER_SIZE;
|
|
|
|
|
|
|
|
av_dlog(s->avctx, "resizing output buffer: %d -> %d\n", s->buffer_size,
|
|
|
|
new_size);
|
|
|
|
tmp = av_realloc(s->buffer, new_size);
|
|
|
|
if (!tmp) {
|
|
|
|
av_freep(&s->buffer);
|
|
|
|
s->buffer_size = s->buffer_index = 0;
|
|
|
|
return AVERROR(ENOMEM);
|
|
|
|
}
|
|
|
|
s->buffer = tmp;
|
|
|
|
s->buffer_size = new_size;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2012-02-17 06:04:54 +01:00
|
|
|
static av_cold int mp3lame_encode_close(AVCodecContext *avctx)
|
2012-02-17 04:12:03 +01:00
|
|
|
{
|
2012-02-17 06:04:54 +01:00
|
|
|
LAMEContext *s = avctx->priv_data;
|
2012-02-17 04:12:03 +01:00
|
|
|
|
2012-08-22 18:23:21 +02:00
|
|
|
av_freep(&s->samples_flt[0]);
|
|
|
|
av_freep(&s->samples_flt[1]);
|
2012-10-16 20:07:04 +02:00
|
|
|
av_freep(&s->buffer);
|
2012-02-17 04:12:03 +01:00
|
|
|
|
2012-02-19 19:16:34 +01:00
|
|
|
ff_af_queue_close(&s->afq);
|
|
|
|
|
2012-02-17 04:12:03 +01:00
|
|
|
lame_close(s->gfp);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2012-02-17 06:04:54 +01:00
|
|
|
static av_cold int mp3lame_encode_init(AVCodecContext *avctx)
|
2002-03-10 15:52:00 +01:00
|
|
|
{
|
2012-02-17 06:04:54 +01:00
|
|
|
LAMEContext *s = avctx->priv_data;
|
2012-02-17 04:12:03 +01:00
|
|
|
int ret;
|
2006-11-01 22:09:14 +01:00
|
|
|
|
2012-02-17 07:50:57 +01:00
|
|
|
s->avctx = avctx;
|
|
|
|
|
2012-02-17 06:04:54 +01:00
|
|
|
/* initialize LAME and get defaults */
|
2006-11-01 22:09:14 +01:00
|
|
|
if ((s->gfp = lame_init()) == NULL)
|
2012-02-17 04:12:03 +01:00
|
|
|
return AVERROR(ENOMEM);
|
2012-02-17 06:04:54 +01:00
|
|
|
|
2006-11-01 22:09:14 +01:00
|
|
|
lame_set_num_channels(s->gfp, avctx->channels);
|
2012-02-17 06:04:54 +01:00
|
|
|
lame_set_mode(s->gfp, avctx->channels > 1 ? JOINT_STEREO : MONO);
|
|
|
|
|
|
|
|
/* sample rate */
|
|
|
|
lame_set_in_samplerate (s->gfp, avctx->sample_rate);
|
|
|
|
lame_set_out_samplerate(s->gfp, avctx->sample_rate);
|
|
|
|
|
|
|
|
/* algorithmic quality */
|
|
|
|
if (avctx->compression_level == FF_COMPRESSION_DEFAULT)
|
2008-08-01 09:23:29 +02:00
|
|
|
lame_set_quality(s->gfp, 5);
|
2012-02-17 06:04:54 +01:00
|
|
|
else
|
2008-08-01 09:23:29 +02:00
|
|
|
lame_set_quality(s->gfp, avctx->compression_level);
|
2012-02-17 06:04:54 +01:00
|
|
|
|
|
|
|
/* rate control */
|
2011-12-29 22:19:55 +01:00
|
|
|
if (avctx->flags & CODEC_FLAG_QSCALE) {
|
2005-08-21 22:27:00 +02:00
|
|
|
lame_set_VBR(s->gfp, vbr_default);
|
2011-12-29 22:19:55 +01:00
|
|
|
lame_set_VBR_quality(s->gfp, avctx->global_quality / (float)FF_QP2LAMBDA);
|
2012-02-17 05:28:38 +01:00
|
|
|
} else {
|
|
|
|
if (avctx->bit_rate)
|
|
|
|
lame_set_brate(s->gfp, avctx->bit_rate / 1000);
|
2005-08-21 22:27:00 +02:00
|
|
|
}
|
2012-02-17 06:04:54 +01:00
|
|
|
|
|
|
|
/* do not get a Xing VBR header frame from LAME */
|
2006-11-01 22:09:14 +01:00
|
|
|
lame_set_bWriteVbrTag(s->gfp,0);
|
2012-02-17 06:04:54 +01:00
|
|
|
|
|
|
|
/* bit reservoir usage */
|
2011-08-27 10:09:09 +02:00
|
|
|
lame_set_disable_reservoir(s->gfp, !s->reservoir);
|
2012-02-17 06:04:54 +01:00
|
|
|
|
|
|
|
/* set specified parameters */
|
2012-02-17 04:12:03 +01:00
|
|
|
if (lame_init_params(s->gfp) < 0) {
|
|
|
|
ret = -1;
|
|
|
|
goto error;
|
|
|
|
}
|
2002-03-10 15:52:00 +01:00
|
|
|
|
2012-02-19 19:16:34 +01:00
|
|
|
/* get encoder delay */
|
|
|
|
avctx->delay = lame_get_encoder_delay(s->gfp) + 528 + 1;
|
|
|
|
ff_af_queue_init(avctx, &s->afq);
|
|
|
|
|
2012-02-17 06:04:54 +01:00
|
|
|
avctx->frame_size = lame_get_framesize(s->gfp);
|
2012-02-19 19:16:34 +01:00
|
|
|
|
2012-08-22 18:23:21 +02:00
|
|
|
/* allocate float sample buffers */
|
|
|
|
if (avctx->sample_fmt == AV_SAMPLE_FMT_FLTP) {
|
2012-02-17 07:50:57 +01:00
|
|
|
int ch;
|
|
|
|
for (ch = 0; ch < avctx->channels; ch++) {
|
2012-08-22 18:23:21 +02:00
|
|
|
s->samples_flt[ch] = av_malloc(avctx->frame_size *
|
|
|
|
sizeof(*s->samples_flt[ch]));
|
|
|
|
if (!s->samples_flt[ch]) {
|
2012-02-17 07:50:57 +01:00
|
|
|
ret = AVERROR(ENOMEM);
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-10-16 20:07:04 +02:00
|
|
|
ret = realloc_buffer(s);
|
|
|
|
if (ret < 0)
|
|
|
|
goto error;
|
|
|
|
|
2012-09-23 00:13:57 +02:00
|
|
|
avpriv_float_dsp_init(&s->fdsp, avctx->flags & CODEC_FLAG_BITEXACT);
|
2012-08-22 18:23:21 +02:00
|
|
|
|
2006-11-01 22:09:14 +01:00
|
|
|
return 0;
|
2012-02-17 04:12:03 +01:00
|
|
|
error:
|
2012-02-17 06:04:54 +01:00
|
|
|
mp3lame_encode_close(avctx);
|
2012-02-17 04:12:03 +01:00
|
|
|
return ret;
|
2002-03-10 15:52:00 +01:00
|
|
|
}
|
|
|
|
|
2012-08-22 18:23:21 +02:00
|
|
|
#define ENCODE_BUFFER(func, buf_type, buf_name) do { \
|
|
|
|
lame_result = func(s->gfp, \
|
|
|
|
(const buf_type *)buf_name[0], \
|
|
|
|
(const buf_type *)buf_name[1], frame->nb_samples, \
|
|
|
|
s->buffer + s->buffer_index, \
|
2012-10-16 20:07:04 +02:00
|
|
|
s->buffer_size - s->buffer_index); \
|
2012-02-17 07:50:57 +01:00
|
|
|
} while (0)
|
|
|
|
|
2012-02-19 19:16:34 +01:00
|
|
|
static int mp3lame_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
|
|
|
|
const AVFrame *frame, int *got_packet_ptr)
|
2002-03-10 15:52:00 +01:00
|
|
|
{
|
2012-02-17 06:04:54 +01:00
|
|
|
LAMEContext *s = avctx->priv_data;
|
2012-02-17 05:06:54 +01:00
|
|
|
MPADecodeHeader hdr;
|
2012-08-22 18:23:21 +02:00
|
|
|
int len, ret, ch;
|
2006-11-01 22:09:14 +01:00
|
|
|
int lame_result;
|
2002-03-10 15:52:00 +01:00
|
|
|
|
2012-02-19 19:16:34 +01:00
|
|
|
if (frame) {
|
2012-02-17 07:50:57 +01:00
|
|
|
switch (avctx->sample_fmt) {
|
2012-08-22 18:23:21 +02:00
|
|
|
case AV_SAMPLE_FMT_S16P:
|
|
|
|
ENCODE_BUFFER(lame_encode_buffer, int16_t, frame->data);
|
2012-02-17 07:50:57 +01:00
|
|
|
break;
|
2012-08-22 18:23:21 +02:00
|
|
|
case AV_SAMPLE_FMT_S32P:
|
|
|
|
ENCODE_BUFFER(lame_encode_buffer_int, int32_t, frame->data);
|
2012-02-17 07:50:57 +01:00
|
|
|
break;
|
2012-08-22 18:23:21 +02:00
|
|
|
case AV_SAMPLE_FMT_FLTP:
|
|
|
|
if (frame->linesize[0] < 4 * FFALIGN(frame->nb_samples, 8)) {
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "inadequate AVFrame plane padding\n");
|
|
|
|
return AVERROR(EINVAL);
|
|
|
|
}
|
|
|
|
for (ch = 0; ch < avctx->channels; ch++) {
|
2012-09-23 00:13:57 +02:00
|
|
|
s->fdsp.vector_fmul_scalar(s->samples_flt[ch],
|
|
|
|
(const float *)frame->data[ch],
|
|
|
|
32768.0f,
|
|
|
|
FFALIGN(frame->nb_samples, 8));
|
2012-08-22 18:23:21 +02:00
|
|
|
}
|
|
|
|
ENCODE_BUFFER(lame_encode_buffer_float, float, s->samples_flt);
|
2012-02-17 07:50:57 +01:00
|
|
|
break;
|
|
|
|
default:
|
|
|
|
return AVERROR_BUG;
|
2004-06-22 23:14:01 +02:00
|
|
|
}
|
2011-12-29 22:19:55 +01:00
|
|
|
} else {
|
|
|
|
lame_result = lame_encode_flush(s->gfp, s->buffer + s->buffer_index,
|
2013-01-16 23:52:55 +01:00
|
|
|
s->buffer_size - s->buffer_index);
|
2004-04-16 03:48:05 +02:00
|
|
|
}
|
2011-12-29 22:19:55 +01:00
|
|
|
if (lame_result < 0) {
|
|
|
|
if (lame_result == -1) {
|
|
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
|
|
"lame: output buffer too small (buffer index: %d, free bytes: %d)\n",
|
2012-10-16 20:07:04 +02:00
|
|
|
s->buffer_index, s->buffer_size - s->buffer_index);
|
2009-01-11 17:17:36 +01:00
|
|
|
}
|
2009-01-11 17:16:33 +01:00
|
|
|
return -1;
|
2004-04-16 03:48:05 +02:00
|
|
|
}
|
|
|
|
s->buffer_index += lame_result;
|
2012-10-16 20:07:04 +02:00
|
|
|
ret = realloc_buffer(s);
|
|
|
|
if (ret < 0) {
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "error reallocating output buffer\n");
|
|
|
|
return ret;
|
|
|
|
}
|
2004-04-16 03:48:05 +02:00
|
|
|
|
2012-02-19 19:16:34 +01:00
|
|
|
/* add current frame to the queue */
|
|
|
|
if (frame) {
|
2013-01-14 00:02:50 +01:00
|
|
|
if ((ret = ff_af_queue_add(&s->afq, frame)) < 0)
|
2012-02-19 19:16:34 +01:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2012-02-17 06:04:54 +01:00
|
|
|
/* Move 1 frame from the LAME buffer to the output packet, if available.
|
|
|
|
We have to parse the first frame header in the output buffer to
|
|
|
|
determine the frame size. */
|
2011-12-29 22:19:55 +01:00
|
|
|
if (s->buffer_index < 4)
|
2004-04-16 03:48:05 +02:00
|
|
|
return 0;
|
2012-02-17 05:06:54 +01:00
|
|
|
if (avpriv_mpegaudio_decode_header(&hdr, AV_RB32(s->buffer))) {
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "free format output not supported\n");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
len = hdr.frame_size;
|
2012-02-17 04:25:51 +01:00
|
|
|
av_dlog(avctx, "in:%d packet-len:%d index:%d\n", avctx->frame_size, len,
|
|
|
|
s->buffer_index);
|
2011-12-29 22:19:55 +01:00
|
|
|
if (len <= s->buffer_index) {
|
2012-02-19 19:16:34 +01:00
|
|
|
if ((ret = ff_alloc_packet(avpkt, len))) {
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "Error getting output packet\n");
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
memcpy(avpkt->data, s->buffer, len);
|
2009-01-11 17:17:36 +01:00
|
|
|
s->buffer_index -= len;
|
2011-12-29 22:19:55 +01:00
|
|
|
memmove(s->buffer, s->buffer + len, s->buffer_index);
|
2012-02-19 19:16:34 +01:00
|
|
|
|
|
|
|
/* Get the next frame pts/duration */
|
|
|
|
ff_af_queue_remove(&s->afq, avctx->frame_size, &avpkt->pts,
|
|
|
|
&avpkt->duration);
|
|
|
|
|
|
|
|
avpkt->size = len;
|
|
|
|
*got_packet_ptr = 1;
|
|
|
|
}
|
|
|
|
return 0;
|
2002-03-10 15:52:00 +01:00
|
|
|
}
|
|
|
|
|
2012-02-17 06:04:54 +01:00
|
|
|
#define OFFSET(x) offsetof(LAMEContext, x)
|
2011-08-27 10:09:09 +02:00
|
|
|
#define AE AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
|
|
|
|
static const AVOption options[] = {
|
2012-08-31 12:22:31 +02:00
|
|
|
{ "reservoir", "Use bit reservoir.", OFFSET(reservoir), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, AE },
|
2011-08-27 10:09:09 +02:00
|
|
|
{ NULL },
|
|
|
|
};
|
|
|
|
|
|
|
|
static const AVClass libmp3lame_class = {
|
|
|
|
.class_name = "libmp3lame encoder",
|
|
|
|
.item_name = av_default_item_name,
|
|
|
|
.option = options,
|
|
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
|
|
};
|
2002-03-10 15:52:00 +01:00
|
|
|
|
2012-02-17 05:28:38 +01:00
|
|
|
static const AVCodecDefault libmp3lame_defaults[] = {
|
|
|
|
{ "b", "0" },
|
|
|
|
{ NULL },
|
|
|
|
};
|
|
|
|
|
2012-02-17 06:04:54 +01:00
|
|
|
static const int libmp3lame_sample_rates[] = {
|
|
|
|
44100, 48000, 32000, 22050, 24000, 16000, 11025, 12000, 8000, 0
|
|
|
|
};
|
|
|
|
|
2011-01-25 22:40:11 +01:00
|
|
|
AVCodec ff_libmp3lame_encoder = {
|
2011-12-29 22:19:55 +01:00
|
|
|
.name = "libmp3lame",
|
|
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
2012-08-05 11:11:04 +02:00
|
|
|
.id = AV_CODEC_ID_MP3,
|
2012-02-17 06:04:54 +01:00
|
|
|
.priv_data_size = sizeof(LAMEContext),
|
|
|
|
.init = mp3lame_encode_init,
|
2012-02-19 19:16:34 +01:00
|
|
|
.encode2 = mp3lame_encode_frame,
|
2012-02-17 06:04:54 +01:00
|
|
|
.close = mp3lame_encode_close,
|
2012-02-19 19:16:34 +01:00
|
|
|
.capabilities = CODEC_CAP_DELAY | CODEC_CAP_SMALL_LAST_FRAME,
|
2012-08-22 18:23:21 +02:00
|
|
|
.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S32P,
|
|
|
|
AV_SAMPLE_FMT_FLTP,
|
|
|
|
AV_SAMPLE_FMT_S16P,
|
2011-12-29 22:19:55 +01:00
|
|
|
AV_SAMPLE_FMT_NONE },
|
2012-02-17 06:04:54 +01:00
|
|
|
.supported_samplerates = libmp3lame_sample_rates,
|
2012-05-07 21:40:20 +02:00
|
|
|
.channel_layouts = (const uint64_t[]) { AV_CH_LAYOUT_MONO,
|
2012-06-01 00:07:36 +02:00
|
|
|
AV_CH_LAYOUT_STEREO,
|
|
|
|
0 },
|
2011-12-29 22:19:55 +01:00
|
|
|
.long_name = NULL_IF_CONFIG_SMALL("libmp3lame MP3 (MPEG audio layer 3)"),
|
|
|
|
.priv_class = &libmp3lame_class,
|
2012-02-17 05:28:38 +01:00
|
|
|
.defaults = libmp3lame_defaults,
|
2002-03-10 15:52:00 +01:00
|
|
|
};
|