t/dprintf printf -> av_log
[libav.git] / libavcodec / mp3lameaudio.c
CommitLineData
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1/*
2 * Interface to libmp3lame for mp3 encoding
3 * Copyright (c) 2002 Lennert Buytenhek <buytenh@gnu.org>
4 *
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5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
0716b577 9 *
ff4ec49e 10 * This library is distributed in the hope that it will be useful,
0716b577 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
0716b577 14 *
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15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
0716b577 18 */
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19
20/**
21 * @file mp3lameaudio.c
22 * Interface to libmp3lame for mp3 encoding.
23 */
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24
25#include "avcodec.h"
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26#include "mpegaudio.h"
27#include <lame/lame.h>
28
2f996b83 29#define BUFFER_SIZE (2*MPA_FRAME_SIZE)
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30typedef struct Mp3AudioContext {
31 lame_global_flags *gfp;
0716b577 32 int stereo;
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33 uint8_t buffer[BUFFER_SIZE];
34 int buffer_index;
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35} Mp3AudioContext;
36
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37static int MP3lame_encode_init(AVCodecContext *avctx)
38{
39 Mp3AudioContext *s = avctx->priv_data;
40
41 if (avctx->channels > 2)
42 return -1;
43
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44 s->stereo = avctx->channels > 1 ? 1 : 0;
45
46 if ((s->gfp = lame_init()) == NULL)
47 goto err;
48 lame_set_in_samplerate(s->gfp, avctx->sample_rate);
e2263827 49 lame_set_out_samplerate(s->gfp, avctx->sample_rate);
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50 lame_set_num_channels(s->gfp, avctx->channels);
51 /* lame 3.91 dies on quality != 5 */
52 lame_set_quality(s->gfp, 5);
53 /* lame 3.91 doesn't work in mono */
54 lame_set_mode(s->gfp, JOINT_STEREO);
55 lame_set_brate(s->gfp, avctx->bit_rate/1000);
c276af04 56 lame_set_bWriteVbrTag(s->gfp,0);
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57 if (lame_init_params(s->gfp) < 0)
58 goto err_close;
59
60 avctx->frame_size = MPA_FRAME_SIZE;
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61
62 avctx->coded_frame= avcodec_alloc_frame();
63 avctx->coded_frame->key_frame= 1;
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64
65 return 0;
66
67err_close:
68 lame_close(s->gfp);
69err:
70 return -1;
71}
72
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73static const int sSampleRates[3] = {
74 44100, 48000, 32000
75};
76
77static const int sBitRates[2][3][15] = {
78 { { 0, 32, 64, 96,128,160,192,224,256,288,320,352,384,416,448},
79 { 0, 32, 48, 56, 64, 80, 96,112,128,160,192,224,256,320,384},
80 { 0, 32, 40, 48, 56, 64, 80, 96,112,128,160,192,224,256,320}
81 },
82 { { 0, 32, 48, 56, 64, 80, 96,112,128,144,160,176,192,224,256},
83 { 0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96,112,128,144,160},
84 { 0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96,112,128,144,160}
85 },
86};
87
88static const int sSamplesPerFrame[2][3] =
89{
90 { 384, 1152, 1152 },
91 { 384, 1152, 576 }
92};
93
94static const int sBitsPerSlot[3] = {
95 32,
96 8,
97 8
98};
99
100static int mp3len(void *data, int *samplesPerFrame, int *sampleRate)
101{
102 uint8_t *dataTmp = (uint8_t *)data;
103 uint32_t header = ( (uint32_t)dataTmp[0] << 24 ) | ( (uint32_t)dataTmp[1] << 16 ) | ( (uint32_t)dataTmp[2] << 8 ) | (uint32_t)dataTmp[3];
104 int layerID = 3 - ((header >> 17) & 0x03);
105 int bitRateID = ((header >> 12) & 0x0f);
106 int sampleRateID = ((header >> 10) & 0x03);
107 int bitsPerSlot = sBitsPerSlot[layerID];
108 int isPadded = ((header >> 9) & 0x01);
109 static int const mode_tab[4]= {2,3,1,0};
110 int mode= mode_tab[(header >> 19) & 0x03];
111 int mpeg_id= mode>0;
112 int temp0, temp1, bitRate;
113
114 if ( (( header >> 21 ) & 0x7ff) != 0x7ff || mode == 3 || layerID==3 || sampleRateID==3) {
115 return -1;
116 }
117
118 if(!samplesPerFrame) samplesPerFrame= &temp0;
119 if(!sampleRate ) sampleRate = &temp1;
120
121// *isMono = ((header >> 6) & 0x03) == 0x03;
122
123 *sampleRate = sSampleRates[sampleRateID]>>mode;
124 bitRate = sBitRates[mpeg_id][layerID][bitRateID] * 1000;
125 *samplesPerFrame = sSamplesPerFrame[mpeg_id][layerID];
126//av_log(NULL, AV_LOG_DEBUG, "sr:%d br:%d spf:%d l:%d m:%d\n", *sampleRate, bitRate, *samplesPerFrame, layerID, mode);
127
128 return *samplesPerFrame * bitRate / (bitsPerSlot * *sampleRate) + isPadded;
129}
130
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131int MP3lame_encode_frame(AVCodecContext *avctx,
132 unsigned char *frame, int buf_size, void *data)
133{
134 Mp3AudioContext *s = avctx->priv_data;
2f996b83 135 int len, i;
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136
137 /* lame 3.91 dies on '1-channel interleaved' data */
138 if (s->stereo) {
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139 s->buffer_index += lame_encode_buffer_interleaved(
140 s->gfp,
141 data,
142 MPA_FRAME_SIZE,
143 s->buffer + s->buffer_index,
144 BUFFER_SIZE - s->buffer_index
145 );
0716b577 146 } else {
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147 s->buffer_index += lame_encode_buffer(
148 s->gfp,
149 data,
150 data,
151 MPA_FRAME_SIZE,
152 s->buffer + s->buffer_index,
153 BUFFER_SIZE - s->buffer_index
154 );
155 }
156 if(s->buffer_index<4)
157 return 0;
158
159 len= mp3len(s->buffer, NULL, NULL);
160//av_log(avctx, AV_LOG_DEBUG, "in:%d packet-len:%d index:%d\n", MPA_FRAME_SIZE, len, s->buffer_index);
161 if(len <= s->buffer_index){
162 memcpy(frame, s->buffer, len);
163 s->buffer_index -= len;
164
165 memmove(s->buffer, s->buffer+len, s->buffer_index);
166 //FIXME fix the audio codec API, so we dont need the memcpy()
167 //FIXME fix the audio codec API, so we can output multiple packets if we have them
168/*for(i=0; i<len; i++){
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169 av_log(avctx, AV_LOG_DEBUG, "%2X ", frame[i]);
170}*/
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171 return len;
172 }else
173 return 0;
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174}
175
176int MP3lame_encode_close(AVCodecContext *avctx)
177{
178 Mp3AudioContext *s = avctx->priv_data;
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179
180 av_freep(&avctx->coded_frame);
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181
182 lame_close(s->gfp);
183 return 0;
184}
185
186
187AVCodec mp3lame_encoder = {
188 "mp3",
189 CODEC_TYPE_AUDIO,
80783dc2 190 CODEC_ID_MP3,
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191 sizeof(Mp3AudioContext),
192 MP3lame_encode_init,
193 MP3lame_encode_frame,
194 MP3lame_encode_close
195};