blob: ecf690a5530128eef311ff8870b94ab689c40bcc
| 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 | #include <vorbis/vorbisenc.h> |
| 22 | |
| 23 | #include "avcodec.h" |
| 24 | #include "bytestream.h" |
| 25 | #include "internal.h" |
| 26 | |
| 27 | typedef struct OggVorbisDecContext { |
| 28 | vorbis_info vi; /**< vorbis_info used during init */ |
| 29 | vorbis_dsp_state vd; /**< DSP state used for analysis */ |
| 30 | vorbis_block vb; /**< vorbis_block used for analysis */ |
| 31 | vorbis_comment vc; /**< VorbisComment info */ |
| 32 | ogg_packet op; /**< ogg packet */ |
| 33 | } OggVorbisDecContext; |
| 34 | |
| 35 | static int oggvorbis_decode_close(AVCodecContext *avccontext); |
| 36 | |
| 37 | static int oggvorbis_decode_init(AVCodecContext *avccontext) { |
| 38 | OggVorbisDecContext *context = avccontext->priv_data ; |
| 39 | uint8_t *p= avccontext->extradata; |
| 40 | int i, hsizes[3], ret; |
| 41 | unsigned char *headers[3], *extradata = avccontext->extradata; |
| 42 | |
| 43 | if(! avccontext->extradata_size || ! p) { |
| 44 | av_log(avccontext, AV_LOG_ERROR, "vorbis extradata absent\n"); |
| 45 | return AVERROR(EINVAL); |
| 46 | } |
| 47 | |
| 48 | vorbis_info_init(&context->vi) ; |
| 49 | vorbis_comment_init(&context->vc) ; |
| 50 | |
| 51 | if(p[0] == 0 && p[1] == 30) { |
| 52 | for(i = 0; i < 3; i++){ |
| 53 | hsizes[i] = bytestream_get_be16((const uint8_t **)&p); |
| 54 | headers[i] = p; |
| 55 | p += hsizes[i]; |
| 56 | } |
| 57 | } else if(*p == 2) { |
| 58 | unsigned int offset = 1; |
| 59 | p++; |
| 60 | for(i=0; i<2; i++) { |
| 61 | hsizes[i] = 0; |
| 62 | while((*p == 0xFF) && (offset < avccontext->extradata_size)) { |
| 63 | hsizes[i] += 0xFF; |
| 64 | offset++; |
| 65 | p++; |
| 66 | } |
| 67 | if(offset >= avccontext->extradata_size - 1) { |
| 68 | av_log(avccontext, AV_LOG_ERROR, |
| 69 | "vorbis header sizes damaged\n"); |
| 70 | ret = AVERROR_INVALIDDATA; |
| 71 | goto error; |
| 72 | } |
| 73 | hsizes[i] += *p; |
| 74 | offset++; |
| 75 | p++; |
| 76 | } |
| 77 | hsizes[2] = avccontext->extradata_size - hsizes[0]-hsizes[1]-offset; |
| 78 | #if 0 |
| 79 | av_log(avccontext, AV_LOG_DEBUG, |
| 80 | "vorbis header sizes: %d, %d, %d, / extradata_len is %d \n", |
| 81 | hsizes[0], hsizes[1], hsizes[2], avccontext->extradata_size); |
| 82 | #endif |
| 83 | headers[0] = extradata + offset; |
| 84 | headers[1] = extradata + offset + hsizes[0]; |
| 85 | headers[2] = extradata + offset + hsizes[0] + hsizes[1]; |
| 86 | } else { |
| 87 | av_log(avccontext, AV_LOG_ERROR, |
| 88 | "vorbis initial header len is wrong: %d\n", *p); |
| 89 | ret = AVERROR_INVALIDDATA; |
| 90 | goto error; |
| 91 | } |
| 92 | |
| 93 | for(i=0; i<3; i++){ |
| 94 | context->op.b_o_s= i==0; |
| 95 | context->op.bytes = hsizes[i]; |
| 96 | context->op.packet = headers[i]; |
| 97 | if(vorbis_synthesis_headerin(&context->vi, &context->vc, &context->op)<0){ |
| 98 | av_log(avccontext, AV_LOG_ERROR, "%d. vorbis header damaged\n", i+1); |
| 99 | ret = AVERROR_INVALIDDATA; |
| 100 | goto error; |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | avccontext->channels = context->vi.channels; |
| 105 | avccontext->sample_rate = context->vi.rate; |
| 106 | avccontext->sample_fmt = AV_SAMPLE_FMT_S16; |
| 107 | avccontext->time_base= (AVRational){1, avccontext->sample_rate}; |
| 108 | |
| 109 | vorbis_synthesis_init(&context->vd, &context->vi); |
| 110 | vorbis_block_init(&context->vd, &context->vb); |
| 111 | |
| 112 | return 0 ; |
| 113 | |
| 114 | error: |
| 115 | oggvorbis_decode_close(avccontext); |
| 116 | return ret; |
| 117 | } |
| 118 | |
| 119 | |
| 120 | static inline int conv(int samples, float **pcm, char *buf, int channels) { |
| 121 | int i, j; |
| 122 | ogg_int16_t *ptr, *data = (ogg_int16_t*)buf ; |
| 123 | float *mono ; |
| 124 | |
| 125 | for(i = 0 ; i < channels ; i++){ |
| 126 | ptr = &data[i]; |
| 127 | mono = pcm[i] ; |
| 128 | |
| 129 | for(j = 0 ; j < samples ; j++) { |
| 130 | *ptr = av_clip_int16(mono[j] * 32767.f); |
| 131 | ptr += channels; |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | return 0 ; |
| 136 | } |
| 137 | |
| 138 | static int oggvorbis_decode_frame(AVCodecContext *avccontext, void *data, |
| 139 | int *got_frame_ptr, AVPacket *avpkt) |
| 140 | { |
| 141 | OggVorbisDecContext *context = avccontext->priv_data ; |
| 142 | AVFrame *frame = data; |
| 143 | float **pcm ; |
| 144 | ogg_packet *op= &context->op; |
| 145 | int samples, total_samples, total_bytes; |
| 146 | int ret; |
| 147 | int16_t *output; |
| 148 | |
| 149 | if(!avpkt->size){ |
| 150 | //FIXME flush |
| 151 | return 0; |
| 152 | } |
| 153 | |
| 154 | frame->nb_samples = 8192*4; |
| 155 | if ((ret = ff_get_buffer(avccontext, frame, 0)) < 0) |
| 156 | return ret; |
| 157 | output = (int16_t *)frame->data[0]; |
| 158 | |
| 159 | |
| 160 | op->packet = avpkt->data; |
| 161 | op->bytes = avpkt->size; |
| 162 | |
| 163 | // av_log(avccontext, AV_LOG_DEBUG, "%d %d %d %"PRId64" %"PRId64" %d %d\n", op->bytes, op->b_o_s, op->e_o_s, op->granulepos, op->packetno, buf_size, context->vi.rate); |
| 164 | |
| 165 | /* for(i=0; i<op->bytes; i++) |
| 166 | av_log(avccontext, AV_LOG_DEBUG, "%02X ", op->packet[i]); |
| 167 | av_log(avccontext, AV_LOG_DEBUG, "\n");*/ |
| 168 | |
| 169 | if(vorbis_synthesis(&context->vb, op) == 0) |
| 170 | vorbis_synthesis_blockin(&context->vd, &context->vb) ; |
| 171 | |
| 172 | total_samples = 0 ; |
| 173 | total_bytes = 0 ; |
| 174 | |
| 175 | while((samples = vorbis_synthesis_pcmout(&context->vd, &pcm)) > 0) { |
| 176 | conv(samples, pcm, (char*)output + total_bytes, context->vi.channels) ; |
| 177 | total_bytes += samples * 2 * context->vi.channels ; |
| 178 | total_samples += samples ; |
| 179 | vorbis_synthesis_read(&context->vd, samples) ; |
| 180 | } |
| 181 | |
| 182 | frame->nb_samples = total_samples; |
| 183 | *got_frame_ptr = total_samples > 0; |
| 184 | return avpkt->size; |
| 185 | } |
| 186 | |
| 187 | |
| 188 | static int oggvorbis_decode_close(AVCodecContext *avccontext) { |
| 189 | OggVorbisDecContext *context = avccontext->priv_data ; |
| 190 | |
| 191 | vorbis_block_clear(&context->vb); |
| 192 | vorbis_dsp_clear(&context->vd); |
| 193 | vorbis_info_clear(&context->vi) ; |
| 194 | vorbis_comment_clear(&context->vc) ; |
| 195 | |
| 196 | return 0 ; |
| 197 | } |
| 198 | |
| 199 | |
| 200 | AVCodec ff_libvorbis_decoder = { |
| 201 | .name = "libvorbis", |
| 202 | .long_name = NULL_IF_CONFIG_SMALL("libvorbis"), |
| 203 | .type = AVMEDIA_TYPE_AUDIO, |
| 204 | .id = AV_CODEC_ID_VORBIS, |
| 205 | .priv_data_size = sizeof(OggVorbisDecContext), |
| 206 | .init = oggvorbis_decode_init, |
| 207 | .decode = oggvorbis_decode_frame, |
| 208 | .close = oggvorbis_decode_close, |
| 209 | .capabilities = AV_CODEC_CAP_DELAY, |
| 210 | }; |
| 211 |