Merge branch 'mirror' into vdpau
[FFMpeg-mirror/ffmpeg-vdpau.git] / libavcodec / libvorbis.c
blob03c9f885c1281fff10c56b83ad7569157a56da91
1 /*
2 * copyright (c) 2002 Mark Hills <mark@pogo.org.uk>
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
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.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 /**
22 * @file oggvorbis.c
23 * Ogg Vorbis codec support via libvorbisenc.
24 * @author Mark Hills <mark@pogo.org.uk>
27 #include <vorbis/vorbisenc.h>
29 #include "avcodec.h"
30 #include "bytestream.h"
32 #undef NDEBUG
33 #include <assert.h>
35 #define OGGVORBIS_FRAME_SIZE 64
37 #define BUFFER_SIZE (1024*64)
39 typedef struct OggVorbisContext {
40 vorbis_info vi ;
41 vorbis_dsp_state vd ;
42 vorbis_block vb ;
43 uint8_t buffer[BUFFER_SIZE];
44 int buffer_index;
45 int eof;
47 /* decoder */
48 vorbis_comment vc ;
49 ogg_packet op;
50 } OggVorbisContext ;
53 static int oggvorbis_init_encoder(vorbis_info *vi, AVCodecContext *avccontext) {
54 double cfreq;
56 if(avccontext->flags & CODEC_FLAG_QSCALE) {
57 /* variable bitrate */
58 if(vorbis_encode_setup_vbr(vi, avccontext->channels,
59 avccontext->sample_rate,
60 avccontext->global_quality / (float)FF_QP2LAMBDA))
61 return -1;
62 } else {
63 /* constant bitrate */
64 if(vorbis_encode_setup_managed(vi, avccontext->channels,
65 avccontext->sample_rate, -1, avccontext->bit_rate, -1))
66 return -1;
68 #ifdef OGGVORBIS_VBR_BY_ESTIMATE
69 /* variable bitrate by estimate */
70 if(vorbis_encode_ctl(vi, OV_ECTL_RATEMANAGE_AVG, NULL))
71 return -1;
72 #endif
75 /* cutoff frequency */
76 if(avccontext->cutoff > 0) {
77 cfreq = avccontext->cutoff / 1000.0;
78 if(vorbis_encode_ctl(vi, OV_ECTL_LOWPASS_SET, &cfreq))
79 return -1;
82 return vorbis_encode_setup_init(vi);
85 static av_cold int oggvorbis_encode_init(AVCodecContext *avccontext) {
86 OggVorbisContext *context = avccontext->priv_data ;
87 ogg_packet header, header_comm, header_code;
88 uint8_t *p;
89 unsigned int offset, len;
91 vorbis_info_init(&context->vi) ;
92 if(oggvorbis_init_encoder(&context->vi, avccontext) < 0) {
93 av_log(avccontext, AV_LOG_ERROR, "oggvorbis_encode_init: init_encoder failed") ;
94 return -1 ;
96 vorbis_analysis_init(&context->vd, &context->vi) ;
97 vorbis_block_init(&context->vd, &context->vb) ;
99 vorbis_comment_init(&context->vc);
100 vorbis_comment_add_tag(&context->vc, "encoder", LIBAVCODEC_IDENT) ;
102 vorbis_analysis_headerout(&context->vd, &context->vc, &header,
103 &header_comm, &header_code);
105 len = header.bytes + header_comm.bytes + header_code.bytes;
106 avccontext->extradata_size= 64 + len + len/255;
107 p = avccontext->extradata= av_mallocz(avccontext->extradata_size);
108 p[0] = 2;
109 offset = 1;
110 offset += av_xiphlacing(&p[offset], header.bytes);
111 offset += av_xiphlacing(&p[offset], header_comm.bytes);
112 memcpy(&p[offset], header.packet, header.bytes);
113 offset += header.bytes;
114 memcpy(&p[offset], header_comm.packet, header_comm.bytes);
115 offset += header_comm.bytes;
116 memcpy(&p[offset], header_code.packet, header_code.bytes);
117 offset += header_code.bytes;
118 avccontext->extradata_size = offset;
119 avccontext->extradata= av_realloc(avccontext->extradata, avccontext->extradata_size);
121 /* vorbis_block_clear(&context->vb);
122 vorbis_dsp_clear(&context->vd);
123 vorbis_info_clear(&context->vi);*/
124 vorbis_comment_clear(&context->vc);
126 avccontext->frame_size = OGGVORBIS_FRAME_SIZE ;
128 avccontext->coded_frame= avcodec_alloc_frame();
129 avccontext->coded_frame->key_frame= 1;
131 return 0 ;
135 static int oggvorbis_encode_frame(AVCodecContext *avccontext,
136 unsigned char *packets,
137 int buf_size, void *data)
139 OggVorbisContext *context = avccontext->priv_data ;
140 ogg_packet op ;
141 signed short *audio = data ;
142 int l;
144 if(data) {
145 int samples = OGGVORBIS_FRAME_SIZE;
146 float **buffer ;
148 buffer = vorbis_analysis_buffer(&context->vd, samples) ;
149 if(context->vi.channels == 1) {
150 for(l = 0 ; l < samples ; l++)
151 buffer[0][l]=audio[l]/32768.f;
152 } else {
153 for(l = 0 ; l < samples ; l++){
154 buffer[0][l]=audio[l*2]/32768.f;
155 buffer[1][l]=audio[l*2+1]/32768.f;
158 vorbis_analysis_wrote(&context->vd, samples) ;
159 } else {
160 if(!context->eof)
161 vorbis_analysis_wrote(&context->vd, 0) ;
162 context->eof = 1;
165 while(vorbis_analysis_blockout(&context->vd, &context->vb) == 1) {
166 vorbis_analysis(&context->vb, NULL);
167 vorbis_bitrate_addblock(&context->vb) ;
169 while(vorbis_bitrate_flushpacket(&context->vd, &op)) {
170 /* i'd love to say the following line is a hack, but sadly it's
171 * not, apparently the end of stream decision is in libogg. */
172 if(op.bytes==1)
173 continue;
174 memcpy(context->buffer + context->buffer_index, &op, sizeof(ogg_packet));
175 context->buffer_index += sizeof(ogg_packet);
176 memcpy(context->buffer + context->buffer_index, op.packet, op.bytes);
177 context->buffer_index += op.bytes;
178 // av_log(avccontext, AV_LOG_DEBUG, "e%d / %d\n", context->buffer_index, op.bytes);
182 l=0;
183 if(context->buffer_index){
184 ogg_packet *op2= (ogg_packet*)context->buffer;
185 op2->packet = context->buffer + sizeof(ogg_packet);
187 l= op2->bytes;
188 avccontext->coded_frame->pts= av_rescale_q(op2->granulepos, (AVRational){1, avccontext->sample_rate}, avccontext->time_base);
189 //FIXME we should reorder the user supplied pts and not assume that they are spaced by 1/sample_rate
191 memcpy(packets, op2->packet, l);
192 context->buffer_index -= l + sizeof(ogg_packet);
193 memcpy(context->buffer, context->buffer + l + sizeof(ogg_packet), context->buffer_index);
194 // av_log(avccontext, AV_LOG_DEBUG, "E%d\n", l);
197 return l;
201 static av_cold int oggvorbis_encode_close(AVCodecContext *avccontext) {
202 OggVorbisContext *context = avccontext->priv_data ;
203 /* ogg_packet op ; */
205 vorbis_analysis_wrote(&context->vd, 0) ; /* notify vorbisenc this is EOF */
207 vorbis_block_clear(&context->vb);
208 vorbis_dsp_clear(&context->vd);
209 vorbis_info_clear(&context->vi);
211 av_freep(&avccontext->coded_frame);
212 av_freep(&avccontext->extradata);
214 return 0 ;
218 AVCodec libvorbis_encoder = {
219 "libvorbis",
220 CODEC_TYPE_AUDIO,
221 CODEC_ID_VORBIS,
222 sizeof(OggVorbisContext),
223 oggvorbis_encode_init,
224 oggvorbis_encode_frame,
225 oggvorbis_encode_close,
226 .capabilities= CODEC_CAP_DELAY,
227 .sample_fmts = (enum SampleFormat[]){SAMPLE_FMT_S16,SAMPLE_FMT_NONE},
228 .long_name= NULL_IF_CONFIG_SMALL("libvorbis Vorbis"),