mpegaudioenc: return AVERROR codes instead of -1
[libav.git] / libavcodec / libvorbis.c
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1/*
2 * copyright (c) 2002 Mark Hills <mark@pogo.org.uk>
3 *
2912e87a 4 * This file is part of Libav.
b78e7197 5 *
2912e87a 6 * Libav 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 *
2912e87a 11 * Libav 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
2912e87a 17 * License along with Libav; 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
983e3246 21/**
ba87f080 22 * @file
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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
77336a5e 29#include "libavutil/opt.h"
81e0d0b4 30#include "avcodec.h"
2c124cb6 31#include "bytestream.h"
91a28b0e 32#include "internal.h"
9577838f 33#include "vorbis.h"
81e0d0b4 34
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35#undef NDEBUG
36#include <assert.h>
37
6d8f985e 38#define OGGVORBIS_FRAME_SIZE 64
81e0d0b4 39
ca5ab8cd 40#define BUFFER_SIZE (1024 * 64)
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41
42typedef struct OggVorbisContext {
77336a5e 43 AVClass *av_class;
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44 vorbis_info vi;
45 vorbis_dsp_state vd;
46 vorbis_block vb;
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47 uint8_t buffer[BUFFER_SIZE];
48 int buffer_index;
9c8f0768 49 int eof;
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50
51 /* decoder */
ca5ab8cd 52 vorbis_comment vc;
d76f581f 53 ogg_packet op;
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54
55 double iblock;
ca5ab8cd 56} OggVorbisContext;
81e0d0b4 57
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58static const AVOption options[] = {
59 { "iblock", "Sets the impulse block bias", offsetof(OggVorbisContext, iblock), AV_OPT_TYPE_DOUBLE, { .dbl = 0 }, -15, 0, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
60 { NULL }
77336a5e 61};
da754858 62static const AVClass class = { "libvorbis", av_default_item_name, options, LIBAVUTIL_VERSION_INT };
81e0d0b4 63
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64static av_cold int oggvorbis_init_encoder(vorbis_info *vi, AVCodecContext *avccontext)
65{
66 OggVorbisContext *context = avccontext->priv_data;
13c71451 67 double cfreq;
c55427f8 68
ca5ab8cd 69 if (avccontext->flags & CODEC_FLAG_QSCALE) {
13c71451 70 /* variable bitrate */
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71 if (vorbis_encode_setup_vbr(vi, avccontext->channels,
72 avccontext->sample_rate,
73 avccontext->global_quality / (float)FF_QP2LAMBDA / 10.0))
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74 return -1;
75 } else {
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76 int minrate = avccontext->rc_min_rate > 0 ? avccontext->rc_min_rate : -1;
77 int maxrate = avccontext->rc_min_rate > 0 ? avccontext->rc_max_rate : -1;
78
13c71451 79 /* constant bitrate */
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80 if (vorbis_encode_setup_managed(vi, avccontext->channels,
81 avccontext->sample_rate, minrate,
82 avccontext->bit_rate, maxrate))
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83 return -1;
84
57ebbccf 85 /* variable bitrate by estimate, disable slow rate management */
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86 if (minrate == -1 && maxrate == -1)
87 if (vorbis_encode_ctl(vi, OV_ECTL_RATEMANAGE2_SET, NULL))
57ebbccf 88 return -1;
13c71451 89 }
c55427f8 90
13c71451 91 /* cutoff frequency */
ca5ab8cd 92 if (avccontext->cutoff > 0) {
13c71451 93 cfreq = avccontext->cutoff / 1000.0;
ca5ab8cd 94 if (vorbis_encode_ctl(vi, OV_ECTL_LOWPASS_SET, &cfreq))
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95 return -1;
96 }
81e0d0b4 97
ca5ab8cd 98 if (context->iblock) {
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99 vorbis_encode_ctl(vi, OV_ECTL_IBLOCK_SET, &context->iblock);
100 }
101
13c71451 102 return vorbis_encode_setup_init(vi);
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103}
104
fd7242dd 105/* How many bytes are needed for a buffer of length 'l' */
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106static int xiph_len(int l)
107{
d4b63054 108 return 1 + l / 255 + l;
ca5ab8cd 109}
fd7242dd 110
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111static av_cold int oggvorbis_encode_init(AVCodecContext *avccontext)
112{
113 OggVorbisContext *context = avccontext->priv_data;
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114 ogg_packet header, header_comm, header_code;
115 uint8_t *p;
fd7242dd 116 unsigned int offset;
81e0d0b4 117
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118 vorbis_info_init(&context->vi);
119 if (oggvorbis_init_encoder(&context->vi, avccontext) < 0) {
120 av_log(avccontext, AV_LOG_ERROR, "oggvorbis_encode_init: init_encoder failed\n");
121 return -1;
81e0d0b4 122 }
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123 vorbis_analysis_init(&context->vd, &context->vi);
124 vorbis_block_init(&context->vd, &context->vb);
81e0d0b4 125
bbb77e7c 126 vorbis_comment_init(&context->vc);
ca5ab8cd 127 vorbis_comment_add_tag(&context->vc, "encoder", LIBAVCODEC_IDENT);
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128
129 vorbis_analysis_headerout(&context->vd, &context->vc, &header,
ca5ab8cd 130 &header_comm, &header_code);
115329f1 131
ca5ab8cd 132 avccontext->extradata_size =
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133 1 + xiph_len(header.bytes) + xiph_len(header_comm.bytes) +
134 header_code.bytes;
135 p = avccontext->extradata =
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136 av_malloc(avccontext->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
137 p[0] = 2;
138 offset = 1;
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139 offset += av_xiphlacing(&p[offset], header.bytes);
140 offset += av_xiphlacing(&p[offset], header_comm.bytes);
141 memcpy(&p[offset], header.packet, header.bytes);
142 offset += header.bytes;
143 memcpy(&p[offset], header_comm.packet, header_comm.bytes);
144 offset += header_comm.bytes;
145 memcpy(&p[offset], header_code.packet, header_code.bytes);
146 offset += header_code.bytes;
fd7242dd 147 assert(offset == avccontext->extradata_size);
115329f1 148
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149#if 0
150 vorbis_block_clear(&context->vb);
bbb77e7c 151 vorbis_dsp_clear(&context->vd);
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152 vorbis_info_clear(&context->vi);
153#endif
bbb77e7c 154 vorbis_comment_clear(&context->vc);
115329f1 155
ca5ab8cd 156 avccontext->frame_size = OGGVORBIS_FRAME_SIZE;
115329f1 157
ca5ab8cd 158 avccontext->coded_frame = avcodec_alloc_frame();
115329f1 159
ca5ab8cd 160 return 0;
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161}
162
3aca208a 163static int oggvorbis_encode_frame(AVCodecContext *avccontext,
bb270c08 164 unsigned char *packets,
ca5ab8cd 165 int buf_size, void *data)
81e0d0b4 166{
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167 OggVorbisContext *context = avccontext->priv_data;
168 ogg_packet op;
169 signed short *audio = data;
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170 int l;
171
ca5ab8cd 172 if (data) {
42859ddb 173 const int samples = avccontext->frame_size;
ca5ab8cd 174 float **buffer;
9577838f 175 int c, channels = context->vi.channels;
81e0d0b4 176
ca5ab8cd 177 buffer = vorbis_analysis_buffer(&context->vd, samples);
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178 for (c = 0; c < channels; c++) {
179 int co = (channels > 8) ? c :
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180 ff_vorbis_encoding_channel_layout_offsets[channels - 1][c];
181 for (l = 0; l < samples; l++)
182 buffer[c][l] = audio[l * channels + co] / 32768.f;
bb270c08 183 }
ca5ab8cd 184 vorbis_analysis_wrote(&context->vd, samples);
9c8f0768 185 } else {
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186 if (!context->eof)
187 vorbis_analysis_wrote(&context->vd, 0);
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188 context->eof = 1;
189 }
81e0d0b4 190
ca5ab8cd 191 while (vorbis_analysis_blockout(&context->vd, &context->vb) == 1) {
bb270c08 192 vorbis_analysis(&context->vb, NULL);
ca5ab8cd 193 vorbis_bitrate_addblock(&context->vb);
81e0d0b4 194
ca5ab8cd 195 while (vorbis_bitrate_flushpacket(&context->vd, &op)) {
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196 /* i'd love to say the following line is a hack, but sadly it's
197 * not, apparently the end of stream decision is in libogg. */
ca5ab8cd 198 if (op.bytes == 1 && op.e_o_s)
6f824977 199 continue;
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200 if (context->buffer_index + sizeof(ogg_packet) + op.bytes > BUFFER_SIZE) {
201 av_log(avccontext, AV_LOG_ERROR, "libvorbis: buffer overflow.");
202 return -1;
203 }
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204 memcpy(context->buffer + context->buffer_index, &op, sizeof(ogg_packet));
205 context->buffer_index += sizeof(ogg_packet);
206 memcpy(context->buffer + context->buffer_index, op.packet, op.bytes);
207 context->buffer_index += op.bytes;
208// av_log(avccontext, AV_LOG_DEBUG, "e%d / %d\n", context->buffer_index, op.bytes);
bb270c08 209 }
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210 }
211
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212 l = 0;
213 if (context->buffer_index) {
214 ogg_packet *op2 = (ogg_packet *)context->buffer;
6d8f985e 215 op2->packet = context->buffer + sizeof(ogg_packet);
3f4993f1 216
ca5ab8cd 217 l = op2->bytes;
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218 avccontext->coded_frame->pts = ff_samples_to_time_base(avccontext,
219 op2->granulepos);
3723f01c 220 //FIXME we should reorder the user supplied pts and not assume that they are spaced by 1/sample_rate
3f4993f1 221
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222 if (l > buf_size) {
223 av_log(avccontext, AV_LOG_ERROR, "libvorbis: buffer overflow.");
224 return -1;
225 }
226
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227 memcpy(packets, op2->packet, l);
228 context->buffer_index -= l + sizeof(ogg_packet);
1204a13c 229 memmove(context->buffer, context->buffer + l + sizeof(ogg_packet), context->buffer_index);
6d8f985e 230// av_log(avccontext, AV_LOG_DEBUG, "E%d\n", l);
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231 }
232
3f4993f1 233 return l;
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234}
235
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236static av_cold int oggvorbis_encode_close(AVCodecContext *avccontext)
237{
238 OggVorbisContext *context = avccontext->priv_data;
81e0d0b4 239/* ogg_packet op ; */
115329f1 240
ca5ab8cd 241 vorbis_analysis_wrote(&context->vd, 0); /* notify vorbisenc this is EOF */
81e0d0b4 242
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243 vorbis_block_clear(&context->vb);
244 vorbis_dsp_clear(&context->vd);
245 vorbis_info_clear(&context->vi);
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246
247 av_freep(&avccontext->coded_frame);
bbb77e7c 248 av_freep(&avccontext->extradata);
115329f1 249
ca5ab8cd 250 return 0;
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251}
252
d36beb3f 253AVCodec ff_libvorbis_encoder = {
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254 .name = "libvorbis",
255 .type = AVMEDIA_TYPE_AUDIO,
256 .id = CODEC_ID_VORBIS,
257 .priv_data_size = sizeof(OggVorbisContext),
258 .init = oggvorbis_encode_init,
259 .encode = oggvorbis_encode_frame,
260 .close = oggvorbis_encode_close,
261 .capabilities = CODEC_CAP_DELAY,
ca5ab8cd 262 .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_NONE },
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263 .long_name = NULL_IF_CONFIG_SMALL("libvorbis Vorbis"),
264 .priv_class = &class,
265};