Add a macro to get the number of elements in a table.
[libav.git] / libavcodec / libvorbis.c
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1/*
2 * copyright (c) 2002 Mark Hills <mark@pogo.org.uk>
3 *
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4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
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7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
b78e7197 9 * version 2.1 of the License, or (at your option) any later version.
04d7f601 10 *
b78e7197 11 * FFmpeg is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
b78e7197 17 * License along with FFmpeg; if not, write to the Free Software
e5a389a1 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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19 */
20
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21/**
22 * @file oggvorbis.c
23 * Ogg Vorbis codec support via libvorbisenc.
24 * @author Mark Hills <mark@pogo.org.uk>
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25 */
26
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27#include <vorbis/vorbisenc.h>
28
29#include "avcodec.h"
2c124cb6 30#include "bytestream.h"
81e0d0b4 31
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32#undef NDEBUG
33#include <assert.h>
34
6d8f985e 35#define OGGVORBIS_FRAME_SIZE 64
81e0d0b4 36
6d8f985e 37#define BUFFER_SIZE (1024*64)
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38
39typedef struct OggVorbisContext {
40 vorbis_info vi ;
41 vorbis_dsp_state vd ;
42 vorbis_block vb ;
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43 uint8_t buffer[BUFFER_SIZE];
44 int buffer_index;
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45
46 /* decoder */
47 vorbis_comment vc ;
d76f581f 48 ogg_packet op;
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49} OggVorbisContext ;
50
51
bbb77e7c 52static int oggvorbis_init_encoder(vorbis_info *vi, AVCodecContext *avccontext) {
13c71451 53 double cfreq;
c55427f8 54
1ff8f2b3 55 if(avccontext->flags & CODEC_FLAG_QSCALE) {
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56 /* variable bitrate */
57 if(vorbis_encode_setup_vbr(vi, avccontext->channels,
1ff8f2b3 58 avccontext->sample_rate,
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59 avccontext->global_quality / (float)FF_QP2LAMBDA))
60 return -1;
61 } else {
62 /* constant bitrate */
63 if(vorbis_encode_setup_managed(vi, avccontext->channels,
64 avccontext->sample_rate, -1, avccontext->bit_rate, -1))
65 return -1;
66
c55427f8 67#ifdef OGGVORBIS_VBR_BY_ESTIMATE
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68 /* variable bitrate by estimate */
69 if(vorbis_encode_ctl(vi, OV_ECTL_RATEMANAGE_AVG, NULL))
70 return -1;
71#endif
72 }
c55427f8 73
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74 /* cutoff frequency */
75 if(avccontext->cutoff > 0) {
76 cfreq = avccontext->cutoff / 1000.0;
77 if(vorbis_encode_ctl(vi, OV_ECTL_LOWPASS_SET, &cfreq))
78 return -1;
79 }
81e0d0b4 80
13c71451 81 return vorbis_encode_setup_init(vi);
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82}
83
98a6fff9 84static av_cold int oggvorbis_encode_init(AVCodecContext *avccontext) {
81e0d0b4 85 OggVorbisContext *context = avccontext->priv_data ;
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86 ogg_packet header, header_comm, header_code;
87 uint8_t *p;
ad2b531d 88 unsigned int offset, len;
81e0d0b4 89
81e0d0b4 90 vorbis_info_init(&context->vi) ;
81e0d0b4 91 if(oggvorbis_init_encoder(&context->vi, avccontext) < 0) {
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92 av_log(avccontext, AV_LOG_ERROR, "oggvorbis_encode_init: init_encoder failed") ;
93 return -1 ;
81e0d0b4 94 }
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95 vorbis_analysis_init(&context->vd, &context->vi) ;
96 vorbis_block_init(&context->vd, &context->vb) ;
97
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98 vorbis_comment_init(&context->vc);
99 vorbis_comment_add_tag(&context->vc, "encoder", LIBAVCODEC_IDENT) ;
100
101 vorbis_analysis_headerout(&context->vd, &context->vc, &header,
102 &header_comm, &header_code);
115329f1 103
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104 len = header.bytes + header_comm.bytes + header_code.bytes;
105 avccontext->extradata_size= 64 + len + len/255;
106 p = avccontext->extradata= av_mallocz(avccontext->extradata_size);
107 p[0] = 2;
108 offset = 1;
109 offset += av_xiphlacing(&p[offset], header.bytes);
110 offset += av_xiphlacing(&p[offset], header_comm.bytes);
111 memcpy(&p[offset], header.packet, header.bytes);
112 offset += header.bytes;
113 memcpy(&p[offset], header_comm.packet, header_comm.bytes);
114 offset += header_comm.bytes;
115 memcpy(&p[offset], header_code.packet, header_code.bytes);
116 offset += header_code.bytes;
117 avccontext->extradata_size = offset;
118 avccontext->extradata= av_realloc(avccontext->extradata, avccontext->extradata_size);
115329f1 119
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120/* vorbis_block_clear(&context->vb);
121 vorbis_dsp_clear(&context->vd);
122 vorbis_info_clear(&context->vi);*/
123 vorbis_comment_clear(&context->vc);
115329f1 124
81e0d0b4 125 avccontext->frame_size = OGGVORBIS_FRAME_SIZE ;
115329f1 126
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127 avccontext->coded_frame= avcodec_alloc_frame();
128 avccontext->coded_frame->key_frame= 1;
115329f1 129
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130 return 0 ;
131}
132
133
3aca208a 134static int oggvorbis_encode_frame(AVCodecContext *avccontext,
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135 unsigned char *packets,
136 int buf_size, void *data)
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137{
138 OggVorbisContext *context = avccontext->priv_data ;
139 float **buffer ;
140 ogg_packet op ;
0d00cf38 141 signed short *audio = data ;
6f824977 142 int l, samples = data ? OGGVORBIS_FRAME_SIZE : 0;
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143
144 buffer = vorbis_analysis_buffer(&context->vd, samples) ;
145
146 if(context->vi.channels == 1) {
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147 for(l = 0 ; l < samples ; l++)
148 buffer[0][l]=audio[l]/32768.f;
81e0d0b4 149 } else {
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150 for(l = 0 ; l < samples ; l++){
151 buffer[0][l]=audio[l*2]/32768.f;
152 buffer[1][l]=audio[l*2+1]/32768.f;
153 }
81e0d0b4 154 }
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155
156 vorbis_analysis_wrote(&context->vd, samples) ;
81e0d0b4 157
81e0d0b4 158 while(vorbis_analysis_blockout(&context->vd, &context->vb) == 1) {
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159 vorbis_analysis(&context->vb, NULL);
160 vorbis_bitrate_addblock(&context->vb) ;
81e0d0b4 161
bb270c08 162 while(vorbis_bitrate_flushpacket(&context->vd, &op)) {
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163 /* i'd love to say the following line is a hack, but sadly it's
164 * not, apparently the end of stream decision is in libogg. */
165 if(op.bytes==1)
6f824977 166 continue;
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167 memcpy(context->buffer + context->buffer_index, &op, sizeof(ogg_packet));
168 context->buffer_index += sizeof(ogg_packet);
169 memcpy(context->buffer + context->buffer_index, op.packet, op.bytes);
170 context->buffer_index += op.bytes;
171// av_log(avccontext, AV_LOG_DEBUG, "e%d / %d\n", context->buffer_index, op.bytes);
bb270c08 172 }
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173 }
174
3f4993f1 175 l=0;
6d8f985e 176 if(context->buffer_index){
bbb77e7c 177 ogg_packet *op2= (ogg_packet*)context->buffer;
6d8f985e 178 op2->packet = context->buffer + sizeof(ogg_packet);
3f4993f1 179
6f824977 180 l= op2->bytes;
42661adf 181 avccontext->coded_frame->pts= av_rescale_q(op2->granulepos, (AVRational){1, avccontext->sample_rate}, avccontext->time_base);
3723f01c 182 //FIXME we should reorder the user supplied pts and not assume that they are spaced by 1/sample_rate
3f4993f1 183
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184 memcpy(packets, op2->packet, l);
185 context->buffer_index -= l + sizeof(ogg_packet);
186 memcpy(context->buffer, context->buffer + l + sizeof(ogg_packet), context->buffer_index);
6d8f985e 187// av_log(avccontext, AV_LOG_DEBUG, "E%d\n", l);
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188 }
189
3f4993f1 190 return l;
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191}
192
193
98a6fff9 194static av_cold int oggvorbis_encode_close(AVCodecContext *avccontext) {
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195 OggVorbisContext *context = avccontext->priv_data ;
196/* ogg_packet op ; */
115329f1 197
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198 vorbis_analysis_wrote(&context->vd, 0) ; /* notify vorbisenc this is EOF */
199
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200 vorbis_block_clear(&context->vb);
201 vorbis_dsp_clear(&context->vd);
202 vorbis_info_clear(&context->vi);
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203
204 av_freep(&avccontext->coded_frame);
bbb77e7c 205 av_freep(&avccontext->extradata);
115329f1 206
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207 return 0 ;
208}
209
210
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211AVCodec libvorbis_encoder = {
212 "libvorbis",
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213 CODEC_TYPE_AUDIO,
214 CODEC_ID_VORBIS,
215 sizeof(OggVorbisContext),
216 oggvorbis_encode_init,
217 oggvorbis_encode_frame,
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218 oggvorbis_encode_close,
219 .capabilities= CODEC_CAP_DELAY,
fd76c37f 220 .sample_fmts = (enum SampleFormat[]){SAMPLE_FMT_S16,SAMPLE_FMT_NONE},
fe4bf374 221 .long_name= NULL_IF_CONFIG_SMALL("libvorbis Vorbis"),
3aca208a 222} ;