use avccontext->frame_size where appropriate
[libav.git] / libavcodec / libvorbis.c
1 /*
2 * copyright (c) 2002 Mark Hills <mark@pogo.org.uk>
3 *
4 * This file is part of FFmpeg.
5 *
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.
10 *
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.
15 *
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
19 */
20
21 /**
22 * @file
23 * Ogg Vorbis codec support via libvorbisenc.
24 * @author Mark Hills <mark@pogo.org.uk>
25 */
26
27 #include <vorbis/vorbisenc.h>
28
29 #include "avcodec.h"
30 #include "bytestream.h"
31 #include "vorbis.h"
32
33 #undef NDEBUG
34 #include <assert.h>
35
36 #define OGGVORBIS_FRAME_SIZE 64
37
38 #define BUFFER_SIZE (1024*64)
39
40 typedef struct OggVorbisContext {
41 vorbis_info vi ;
42 vorbis_dsp_state vd ;
43 vorbis_block vb ;
44 uint8_t buffer[BUFFER_SIZE];
45 int buffer_index;
46 int eof;
47
48 /* decoder */
49 vorbis_comment vc ;
50 ogg_packet op;
51 } OggVorbisContext ;
52
53
54 static av_cold int oggvorbis_init_encoder(vorbis_info *vi, AVCodecContext *avccontext) {
55 double cfreq;
56
57 if(avccontext->flags & CODEC_FLAG_QSCALE) {
58 /* variable bitrate */
59 if(vorbis_encode_setup_vbr(vi, avccontext->channels,
60 avccontext->sample_rate,
61 avccontext->global_quality / (float)FF_QP2LAMBDA / 10.0))
62 return -1;
63 } else {
64 int minrate = avccontext->rc_min_rate > 0 ? avccontext->rc_min_rate : -1;
65 int maxrate = avccontext->rc_min_rate > 0 ? avccontext->rc_max_rate : -1;
66
67 /* constant bitrate */
68 if(vorbis_encode_setup_managed(vi, avccontext->channels,
69 avccontext->sample_rate, minrate, avccontext->bit_rate, maxrate))
70 return -1;
71
72 /* variable bitrate by estimate, disable slow rate management */
73 if(minrate == -1 && maxrate == -1)
74 if(vorbis_encode_ctl(vi, OV_ECTL_RATEMANAGE2_SET, NULL))
75 return -1;
76 }
77
78 /* cutoff frequency */
79 if(avccontext->cutoff > 0) {
80 cfreq = avccontext->cutoff / 1000.0;
81 if(vorbis_encode_ctl(vi, OV_ECTL_LOWPASS_SET, &cfreq))
82 return -1;
83 }
84
85 return vorbis_encode_setup_init(vi);
86 }
87
88 static av_cold int oggvorbis_encode_init(AVCodecContext *avccontext) {
89 OggVorbisContext *context = avccontext->priv_data ;
90 ogg_packet header, header_comm, header_code;
91 uint8_t *p;
92 unsigned int offset, len;
93
94 vorbis_info_init(&context->vi) ;
95 if(oggvorbis_init_encoder(&context->vi, avccontext) < 0) {
96 av_log(avccontext, AV_LOG_ERROR, "oggvorbis_encode_init: init_encoder failed\n") ;
97 return -1 ;
98 }
99 vorbis_analysis_init(&context->vd, &context->vi) ;
100 vorbis_block_init(&context->vd, &context->vb) ;
101
102 vorbis_comment_init(&context->vc);
103 vorbis_comment_add_tag(&context->vc, "encoder", LIBAVCODEC_IDENT) ;
104
105 vorbis_analysis_headerout(&context->vd, &context->vc, &header,
106 &header_comm, &header_code);
107
108 len = header.bytes + header_comm.bytes + header_code.bytes;
109 avccontext->extradata_size= 64 + len + len/255;
110 p = avccontext->extradata= av_mallocz(avccontext->extradata_size);
111 p[0] = 2;
112 offset = 1;
113 offset += av_xiphlacing(&p[offset], header.bytes);
114 offset += av_xiphlacing(&p[offset], header_comm.bytes);
115 memcpy(&p[offset], header.packet, header.bytes);
116 offset += header.bytes;
117 memcpy(&p[offset], header_comm.packet, header_comm.bytes);
118 offset += header_comm.bytes;
119 memcpy(&p[offset], header_code.packet, header_code.bytes);
120 offset += header_code.bytes;
121 avccontext->extradata_size = offset;
122 avccontext->extradata= av_realloc(avccontext->extradata, avccontext->extradata_size);
123
124 /* vorbis_block_clear(&context->vb);
125 vorbis_dsp_clear(&context->vd);
126 vorbis_info_clear(&context->vi);*/
127 vorbis_comment_clear(&context->vc);
128
129 avccontext->frame_size = OGGVORBIS_FRAME_SIZE ;
130
131 avccontext->coded_frame= avcodec_alloc_frame();
132 avccontext->coded_frame->key_frame= 1;
133
134 return 0 ;
135 }
136
137
138 static int oggvorbis_encode_frame(AVCodecContext *avccontext,
139 unsigned char *packets,
140 int buf_size, void *data)
141 {
142 OggVorbisContext *context = avccontext->priv_data ;
143 ogg_packet op ;
144 signed short *audio = data ;
145 int l;
146
147 if(data) {
148 const int samples = avccontext->frame_size;
149 float **buffer ;
150 int c, channels = context->vi.channels;
151
152 buffer = vorbis_analysis_buffer(&context->vd, samples) ;
153 for (c = 0; c < channels; c++) {
154 int co = (channels > 8) ? c :
155 ff_vorbis_encoding_channel_layout_offsets[channels-1][c];
156 for(l = 0 ; l < samples ; l++)
157 buffer[c][l]=audio[l*channels+co]/32768.f;
158 }
159 vorbis_analysis_wrote(&context->vd, samples) ;
160 } else {
161 if(!context->eof)
162 vorbis_analysis_wrote(&context->vd, 0) ;
163 context->eof = 1;
164 }
165
166 while(vorbis_analysis_blockout(&context->vd, &context->vb) == 1) {
167 vorbis_analysis(&context->vb, NULL);
168 vorbis_bitrate_addblock(&context->vb) ;
169
170 while(vorbis_bitrate_flushpacket(&context->vd, &op)) {
171 /* i'd love to say the following line is a hack, but sadly it's
172 * not, apparently the end of stream decision is in libogg. */
173 if(op.bytes==1 && op.e_o_s)
174 continue;
175 memcpy(context->buffer + context->buffer_index, &op, sizeof(ogg_packet));
176 context->buffer_index += sizeof(ogg_packet);
177 memcpy(context->buffer + context->buffer_index, op.packet, op.bytes);
178 context->buffer_index += op.bytes;
179 // av_log(avccontext, AV_LOG_DEBUG, "e%d / %d\n", context->buffer_index, op.bytes);
180 }
181 }
182
183 l=0;
184 if(context->buffer_index){
185 ogg_packet *op2= (ogg_packet*)context->buffer;
186 op2->packet = context->buffer + sizeof(ogg_packet);
187
188 l= op2->bytes;
189 avccontext->coded_frame->pts= av_rescale_q(op2->granulepos, (AVRational){1, avccontext->sample_rate}, avccontext->time_base);
190 //FIXME we should reorder the user supplied pts and not assume that they are spaced by 1/sample_rate
191
192 memcpy(packets, op2->packet, l);
193 context->buffer_index -= l + sizeof(ogg_packet);
194 memmove(context->buffer, context->buffer + l + sizeof(ogg_packet), context->buffer_index);
195 // av_log(avccontext, AV_LOG_DEBUG, "E%d\n", l);
196 }
197
198 return l;
199 }
200
201
202 static av_cold int oggvorbis_encode_close(AVCodecContext *avccontext) {
203 OggVorbisContext *context = avccontext->priv_data ;
204 /* ogg_packet op ; */
205
206 vorbis_analysis_wrote(&context->vd, 0) ; /* notify vorbisenc this is EOF */
207
208 vorbis_block_clear(&context->vb);
209 vorbis_dsp_clear(&context->vd);
210 vorbis_info_clear(&context->vi);
211
212 av_freep(&avccontext->coded_frame);
213 av_freep(&avccontext->extradata);
214
215 return 0 ;
216 }
217
218
219 AVCodec libvorbis_encoder = {
220 "libvorbis",
221 AVMEDIA_TYPE_AUDIO,
222 CODEC_ID_VORBIS,
223 sizeof(OggVorbisContext),
224 oggvorbis_encode_init,
225 oggvorbis_encode_frame,
226 oggvorbis_encode_close,
227 .capabilities= CODEC_CAP_DELAY,
228 .sample_fmts = (const enum SampleFormat[]){SAMPLE_FMT_S16,SAMPLE_FMT_NONE},
229 .long_name= NULL_IF_CONFIG_SMALL("libvorbis Vorbis"),
230 } ;