FFmpeg: libavformat/wavdec.c Source File

00001 /*
00002  * WAV demuxer
00003  * Copyright (c) 2001, 2002 Fabrice Bellard
00004  *
00005  * Sony Wave64 demuxer
00006  * RF64 demuxer
00007  * Copyright (c) 2009 Daniel Verkamp
00008  *
00009  * This file is part of FFmpeg.
00010  *
00011  * FFmpeg is free software; you can redistribute it and/or
00012  * modify it under the terms of the GNU Lesser General Public
00013  * License as published by the Free Software Foundation; either
00014  * version 2.1 of the License, or (at your option) any later version.
00015  *
00016  * FFmpeg is distributed in the hope that it will be useful,
00017  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00018  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00019  * Lesser General Public License for more details.
00020  *
00021  * You should have received a copy of the GNU Lesser General Public
00022  * License along with FFmpeg; if not, write to the Free Software
00023  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00024  */
00025 
00026 #include "libavutil/avassert.h"
00027 #include "libavutil/dict.h"
00028 #include "libavutil/log.h"
00029 #include "libavutil/mathematics.h"
00030 #include "libavutil/opt.h"
00031 #include "avformat.h"
00032 #include "internal.h"
00033 #include "avio_internal.h"
00034 #include "pcm.h"
00035 #include "riff.h"
00036 #include "avio.h"
00037 #include "metadata.h"
00038 
00039 typedef struct WAVDemuxContext {
00040     const AVClass *class;
00041     int64_t data_end;
00042     int w64;
00043     int64_t smv_data_ofs;
00044     int smv_block_size;
00045     int smv_frames_per_jpeg;
00046     int smv_block;
00047     int smv_last_stream;
00048     int smv_eof;
00049     int audio_eof;
00050     int ignore_length;
00051 } WAVDemuxContext;
00052 
00053 
00054 #if CONFIG_WAV_DEMUXER
00055 
00056 static int64_t next_tag(AVIOContext *pb, uint32_t *tag)
00057 {
00058     *tag = avio_rl32(pb);
00059     return avio_rl32(pb);
00060 }
00061 
00062 /* return the size of the found tag */
00063 static int64_t find_tag(AVIOContext *pb, uint32_t tag1)
00064 {
00065     unsigned int tag;
00066     int64_t size;
00067 
00068     for (;;) {
00069         if (url_feof(pb))
00070             return -1;
00071         size = next_tag(pb, &tag);
00072         if (tag == tag1)
00073             break;
00074         avio_skip(pb, size);
00075     }
00076     return size;
00077 }
00078 
00079 static int wav_probe(AVProbeData *p)
00080 {
00081     /* check file header */
00082     if (p->buf_size <= 32)
00083         return 0;
00084     if (!memcmp(p->buf + 8, "WAVE", 4)) {
00085         if (!memcmp(p->buf, "RIFF", 4))
00086             /*
00087               Since ACT demuxer has standard WAV header at top of it's own,
00088               returning score is decreased to avoid probe conflict
00089               between ACT and WAV.
00090             */
00091             return AVPROBE_SCORE_MAX - 1;
00092         else if (!memcmp(p->buf,      "RF64", 4) &&
00093                  !memcmp(p->buf + 12, "ds64", 4))
00094             return AVPROBE_SCORE_MAX;
00095     }
00096     return 0;
00097 }
00098 
00099 static void handle_stream_probing(AVStream *st)
00100 {
00101     if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) {
00102         st->request_probe = AVPROBE_SCORE_MAX/2;
00103         st->probe_packets = FFMIN(st->probe_packets, 4);
00104     }
00105 }
00106 
00107 static int wav_parse_fmt_tag(AVFormatContext *s, int64_t size, AVStream **st)
00108 {
00109     AVIOContext *pb = s->pb;
00110     int ret;
00111 
00112     /* parse fmt header */
00113     *st = avformat_new_stream(s, NULL);
00114     if (!*st)
00115         return AVERROR(ENOMEM);
00116 
00117     ret = ff_get_wav_header(pb, (*st)->codec, size);
00118     if (ret < 0)
00119         return ret;
00120     handle_stream_probing(*st);
00121 
00122     (*st)->need_parsing = AVSTREAM_PARSE_FULL_RAW;
00123 
00124     avpriv_set_pts_info(*st, 64, 1, (*st)->codec->sample_rate);
00125 
00126     return 0;
00127 }
00128 
00129 static inline int wav_parse_bext_string(AVFormatContext *s, const char *key,
00130                                         int length)
00131 {
00132     char temp[257];
00133     int ret;
00134 
00135     av_assert0(length <= sizeof(temp));
00136     if ((ret = avio_read(s->pb, temp, length)) < 0)
00137         return ret;
00138 
00139     temp[length] = 0;
00140 
00141     if (strlen(temp))
00142         return av_dict_set(&s->metadata, key, temp, 0);
00143 
00144     return 0;
00145 }
00146 
00147 static int wav_parse_bext_tag(AVFormatContext *s, int64_t size)
00148 {
00149     char temp[131], *coding_history;
00150     int ret, x;
00151     uint64_t time_reference;
00152     int64_t umid_parts[8], umid_mask = 0;
00153 
00154     if ((ret = wav_parse_bext_string(s, "description", 256)) < 0 ||
00155         (ret = wav_parse_bext_string(s, "originator", 32)) < 0 ||
00156         (ret = wav_parse_bext_string(s, "originator_reference", 32)) < 0 ||
00157         (ret = wav_parse_bext_string(s, "origination_date", 10)) < 0 ||
00158         (ret = wav_parse_bext_string(s, "origination_time", 8)) < 0)
00159         return ret;
00160 
00161     time_reference = avio_rl64(s->pb);
00162     snprintf(temp, sizeof(temp), "%"PRIu64, time_reference);
00163     if ((ret = av_dict_set(&s->metadata, "time_reference", temp, 0)) < 0)
00164         return ret;
00165 
00166     /* check if version is >= 1, in which case an UMID may be present */
00167     if (avio_rl16(s->pb) >= 1) {
00168         for (x = 0; x < 8; x++)
00169             umid_mask |= umid_parts[x] = avio_rb64(s->pb);
00170 
00171         if (umid_mask) {
00172             /* the string formatting below is per SMPTE 330M-2004 Annex C */
00173             if (umid_parts[4] == 0 && umid_parts[5] == 0 && umid_parts[6] == 0 && umid_parts[7] == 0) {
00174                 /* basic UMID */
00175                 snprintf(temp, sizeof(temp), "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64,
00176                          umid_parts[0], umid_parts[1], umid_parts[2], umid_parts[3]);
00177             } else {
00178                 /* extended UMID */
00179                 snprintf(temp, sizeof(temp), "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64
00180                                                "%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64,
00181                          umid_parts[0], umid_parts[1], umid_parts[2], umid_parts[3],
00182                          umid_parts[4], umid_parts[5], umid_parts[6], umid_parts[7]);
00183             }
00184 
00185             if ((ret = av_dict_set(&s->metadata, "umid", temp, 0)) < 0)
00186                 return ret;
00187         }
00188 
00189         avio_skip(s->pb, 190);
00190     } else
00191         avio_skip(s->pb, 254);
00192 
00193     if (size > 602) {
00194         /* CodingHistory present */
00195         size -= 602;
00196 
00197         if (!(coding_history = av_malloc(size+1)))
00198             return AVERROR(ENOMEM);
00199 
00200         if ((ret = avio_read(s->pb, coding_history, size)) < 0)
00201             return ret;
00202 
00203         coding_history[size] = 0;
00204         if ((ret = av_dict_set(&s->metadata, "coding_history", coding_history,
00205                                AV_DICT_DONT_STRDUP_VAL)) < 0)
00206             return ret;
00207     }
00208 
00209     return 0;
00210 }
00211 
00212 static const AVMetadataConv wav_metadata_conv[] = {
00213     {"description",      "comment"      },
00214     {"originator",       "encoded_by"   },
00215     {"origination_date", "date"         },
00216     {"origination_time", "creation_time"},
00217     {0},
00218 };
00219 
00220 /* wav input */
00221 static int wav_read_header(AVFormatContext *s)
00222 {
00223     int64_t size, av_uninit(data_size);
00224     int64_t sample_count=0;
00225     int rf64;
00226     uint32_t tag;
00227     AVIOContext *pb = s->pb;
00228     AVStream *st = NULL;
00229     WAVDemuxContext *wav = s->priv_data;
00230     int ret, got_fmt = 0;
00231     int64_t next_tag_ofs, data_ofs = -1;
00232 
00233     wav->smv_data_ofs = -1;
00234 
00235     /* check RIFF header */
00236     tag = avio_rl32(pb);
00237 
00238     rf64 = tag == MKTAG('R', 'F', '6', '4');
00239     if (!rf64 && tag != MKTAG('R', 'I', 'F', 'F'))
00240         return -1;
00241     avio_rl32(pb); /* file size */
00242     tag = avio_rl32(pb);
00243     if (tag != MKTAG('W', 'A', 'V', 'E'))
00244         return -1;
00245 
00246     if (rf64) {
00247         if (avio_rl32(pb) != MKTAG('d', 's', '6', '4'))
00248             return -1;
00249         size = avio_rl32(pb);
00250         if (size < 24)
00251             return -1;
00252         avio_rl64(pb); /* RIFF size */
00253         data_size = avio_rl64(pb);
00254         sample_count = avio_rl64(pb);
00255         if (data_size < 0 || sample_count < 0) {
00256             av_log(s, AV_LOG_ERROR, "negative data_size and/or sample_count in "
00257                    "ds64: data_size = %"PRId64", sample_count = %"PRId64"\n",
00258                    data_size, sample_count);
00259             return AVERROR_INVALIDDATA;
00260         }
00261         avio_skip(pb, size - 24); /* skip rest of ds64 chunk */
00262 
00263     }
00264 
00265     for (;;) {
00266         AVStream *vst;
00267         size = next_tag(pb, &tag);
00268         next_tag_ofs = avio_tell(pb) + size;
00269 
00270         if (url_feof(pb))
00271             break;
00272 
00273         switch (tag) {
00274         case MKTAG('f', 'm', 't', ' '):
00275             /* only parse the first 'fmt ' tag found */
00276             if (!got_fmt && (ret = wav_parse_fmt_tag(s, size, &st)) < 0) {
00277                 return ret;
00278             } else if (got_fmt)
00279                 av_log(s, AV_LOG_WARNING, "found more than one 'fmt ' tag\n");
00280 
00281             got_fmt = 1;
00282             break;
00283         case MKTAG('d', 'a', 't', 'a'):
00284             if (!got_fmt) {
00285                 av_log(s, AV_LOG_ERROR, "found no 'fmt ' tag before the 'data' tag\n");
00286                 return AVERROR_INVALIDDATA;
00287             }
00288 
00289             if (rf64) {
00290                 next_tag_ofs = wav->data_end = avio_tell(pb) + data_size;
00291             } else {
00292                 data_size = size;
00293                 next_tag_ofs = wav->data_end = size ? next_tag_ofs : INT64_MAX;
00294             }
00295 
00296             data_ofs = avio_tell(pb);
00297 
00298             /* don't look for footer metadata if we can't seek or if we don't
00299              * know where the data tag ends
00300              */
00301             if (!pb->seekable || (!rf64 && !size))
00302                 goto break_loop;
00303             break;
00304         case MKTAG('f','a','c','t'):
00305             if (!sample_count)
00306                 sample_count = avio_rl32(pb);
00307             break;
00308         case MKTAG('b','e','x','t'):
00309             if ((ret = wav_parse_bext_tag(s, size)) < 0)
00310                 return ret;
00311             break;
00312         case MKTAG('S','M','V','0'):
00313             if (!got_fmt) {
00314                 av_log(s, AV_LOG_ERROR, "found no 'fmt ' tag before the 'SMV0' tag\n");
00315                 return AVERROR_INVALIDDATA;
00316             }
00317             // SMV file, a wav file with video appended.
00318             if (size != MKTAG('0','2','0','0')) {
00319                 av_log(s, AV_LOG_ERROR, "Unknown SMV version found\n");
00320                 goto break_loop;
00321             }
00322             av_log(s, AV_LOG_DEBUG, "Found SMV data\n");
00323             vst = avformat_new_stream(s, NULL);
00324             if (!vst)
00325                 return AVERROR(ENOMEM);
00326             avio_r8(pb);
00327             vst->id = 1;
00328             vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
00329             vst->codec->codec_id = AV_CODEC_ID_MJPEG;
00330             vst->codec->width  = avio_rl24(pb);
00331             vst->codec->height = avio_rl24(pb);
00332             size = avio_rl24(pb);
00333             wav->smv_data_ofs = avio_tell(pb) + (size - 5) * 3;
00334             avio_rl24(pb);
00335             wav->smv_block_size = avio_rl24(pb);
00336             avpriv_set_pts_info(vst, 32, 1, avio_rl24(pb));
00337             vst->duration = avio_rl24(pb);
00338             avio_rl24(pb);
00339             avio_rl24(pb);
00340             wav->smv_frames_per_jpeg = avio_rl24(pb);
00341             goto break_loop;
00342         case MKTAG('L', 'I', 'S', 'T'):
00343             if (size < 4) {
00344                 av_log(s, AV_LOG_ERROR, "too short LIST tag\n");
00345                 return AVERROR_INVALIDDATA;
00346             }
00347             switch (avio_rl32(pb)) {
00348             case MKTAG('I', 'N', 'F', 'O'):
00349                 ff_read_riff_info(s, size - 4);
00350             }
00351             break;
00352         }
00353 
00354         /* seek to next tag unless we know that we'll run into EOF */
00355         if ((avio_size(pb) > 0 && next_tag_ofs >= avio_size(pb)) ||
00356             avio_seek(pb, next_tag_ofs, SEEK_SET) < 0) {
00357             break;
00358         }
00359     }
00360 break_loop:
00361     if (data_ofs < 0) {
00362         av_log(s, AV_LOG_ERROR, "no 'data' tag found\n");
00363         return AVERROR_INVALIDDATA;
00364     }
00365 
00366     avio_seek(pb, data_ofs, SEEK_SET);
00367 
00368     if (!sample_count && st->codec->channels && av_get_bits_per_sample(st->codec->codec_id))
00369         sample_count = (data_size<<3) / (st->codec->channels * (uint64_t)av_get_bits_per_sample(st->codec->codec_id));
00370     if (sample_count)
00371         st->duration = sample_count;
00372 
00373     ff_metadata_conv_ctx(s, NULL, wav_metadata_conv);
00374     ff_metadata_conv_ctx(s, NULL, ff_riff_info_conv);
00375 
00376     return 0;
00377 }
00378 
00382 static int64_t find_guid(AVIOContext *pb, const uint8_t guid1[16])
00383 {
00384     uint8_t guid[16];
00385     int64_t size;
00386 
00387     while (!url_feof(pb)) {
00388         avio_read(pb, guid, 16);
00389         size = avio_rl64(pb);
00390         if (size <= 24)
00391             return -1;
00392         if (!memcmp(guid, guid1, 16))
00393             return size;
00394         avio_skip(pb, FFALIGN(size, INT64_C(8)) - 24);
00395     }
00396     return -1;
00397 }
00398 
00399 static const uint8_t guid_data[16] = { 'd', 'a', 't', 'a',
00400     0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
00401 
00402 #define MAX_SIZE 4096
00403 
00404 static int wav_read_packet(AVFormatContext *s,
00405                            AVPacket *pkt)
00406 {
00407     int ret, size;
00408     int64_t left;
00409     AVStream *st;
00410     WAVDemuxContext *wav = s->priv_data;
00411 
00412     if (wav->smv_data_ofs > 0) {
00413         int64_t audio_dts, video_dts;
00414 smv_retry:
00415         audio_dts = s->streams[0]->cur_dts;
00416         video_dts = s->streams[1]->cur_dts;
00417         if (audio_dts != AV_NOPTS_VALUE && video_dts != AV_NOPTS_VALUE) {
00418             audio_dts = av_rescale_q(audio_dts, s->streams[0]->time_base, AV_TIME_BASE_Q);
00419             video_dts = av_rescale_q(video_dts, s->streams[1]->time_base, AV_TIME_BASE_Q);
00420             wav->smv_last_stream = video_dts >= audio_dts;
00421         }
00422         wav->smv_last_stream = !wav->smv_last_stream;
00423         wav->smv_last_stream |= wav->audio_eof;
00424         wav->smv_last_stream &= !wav->smv_eof;
00425         if (wav->smv_last_stream) {
00426             uint64_t old_pos = avio_tell(s->pb);
00427             uint64_t new_pos = wav->smv_data_ofs +
00428                 wav->smv_block * wav->smv_block_size;
00429             if (avio_seek(s->pb, new_pos, SEEK_SET) < 0) {
00430                 ret = AVERROR_EOF;
00431                 goto smv_out;
00432             }
00433             size = avio_rl24(s->pb);
00434             ret  = av_get_packet(s->pb, pkt, size);
00435             if (ret < 0)
00436                 goto smv_out;
00437             pkt->pos -= 3;
00438             pkt->pts = wav->smv_block * wav->smv_frames_per_jpeg;
00439             wav->smv_block++;
00440             pkt->stream_index = 1;
00441 smv_out:
00442             avio_seek(s->pb, old_pos, SEEK_SET);
00443             if (ret == AVERROR_EOF) {
00444                 wav->smv_eof = 1;
00445                 goto smv_retry;
00446             }
00447             return ret;
00448         }
00449     }
00450 
00451     st = s->streams[0];
00452 
00453     left = wav->data_end - avio_tell(s->pb);
00454     if (wav->ignore_length)
00455         left= INT_MAX;
00456     if (left <= 0){
00457         if (CONFIG_W64_DEMUXER && wav->w64)
00458             left = find_guid(s->pb, guid_data) - 24;
00459         else
00460             left = find_tag(s->pb, MKTAG('d', 'a', 't', 'a'));
00461         if (left < 0) {
00462             wav->audio_eof = 1;
00463             if (wav->smv_data_ofs > 0 && !wav->smv_eof)
00464                 goto smv_retry;
00465             return AVERROR_EOF;
00466         }
00467         wav->data_end= avio_tell(s->pb) + left;
00468     }
00469 
00470     size = MAX_SIZE;
00471     if (st->codec->block_align > 1) {
00472         if (size < st->codec->block_align)
00473             size = st->codec->block_align;
00474         size = (size / st->codec->block_align) * st->codec->block_align;
00475     }
00476     size = FFMIN(size, left);
00477     ret  = av_get_packet(s->pb, pkt, size);
00478     if (ret < 0)
00479         return ret;
00480     pkt->stream_index = 0;
00481 
00482     return ret;
00483 }
00484 
00485 static int wav_read_seek(AVFormatContext *s,
00486                          int stream_index, int64_t timestamp, int flags)
00487 {
00488     WAVDemuxContext *wav = s->priv_data;
00489     AVStream *st;
00490     wav->smv_eof = 0;
00491     wav->audio_eof = 0;
00492     if (wav->smv_data_ofs > 0) {
00493         int64_t smv_timestamp = timestamp;
00494         if (stream_index == 0)
00495             smv_timestamp = av_rescale_q(timestamp, s->streams[0]->time_base, s->streams[1]->time_base);
00496         else
00497             timestamp = av_rescale_q(smv_timestamp, s->streams[1]->time_base, s->streams[0]->time_base);
00498         wav->smv_block = smv_timestamp / wav->smv_frames_per_jpeg;
00499     }
00500 
00501     st = s->streams[0];
00502     switch (st->codec->codec_id) {
00503     case AV_CODEC_ID_MP2:
00504     case AV_CODEC_ID_MP3:
00505     case AV_CODEC_ID_AC3:
00506     case AV_CODEC_ID_DTS:
00507         /* use generic seeking with dynamically generated indexes */
00508         return -1;
00509     default:
00510         break;
00511     }
00512     return ff_pcm_read_seek(s, stream_index, timestamp, flags);
00513 }
00514 
00515 #define OFFSET(x) offsetof(WAVDemuxContext, x)
00516 #define DEC AV_OPT_FLAG_DECODING_PARAM
00517 static const AVOption demux_options[] = {
00518     { "ignore_length", "Ignore length", OFFSET(ignore_length), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, DEC },
00519     { NULL },
00520 };
00521 
00522 static const AVClass wav_demuxer_class = {
00523     .class_name = "WAV demuxer",
00524     .item_name  = av_default_item_name,
00525     .option     = demux_options,
00526     .version    = LIBAVUTIL_VERSION_INT,
00527 };
00528 AVInputFormat ff_wav_demuxer = {
00529     .name           = "wav",
00530     .long_name      = NULL_IF_CONFIG_SMALL("WAV / WAVE (Waveform Audio)"),
00531     .priv_data_size = sizeof(WAVDemuxContext),
00532     .read_probe     = wav_probe,
00533     .read_header    = wav_read_header,
00534     .read_packet    = wav_read_packet,
00535     .read_seek      = wav_read_seek,
00536     .flags          = AVFMT_GENERIC_INDEX,
00537     .codec_tag      = (const AVCodecTag* const []){ ff_codec_wav_tags, 0 },
00538     .priv_class     = &wav_demuxer_class,
00539 };
00540 #endif /* CONFIG_WAV_DEMUXER */
00541 
00542 
00543 #if CONFIG_W64_DEMUXER
00544 static const uint8_t guid_riff[16] = { 'r', 'i', 'f', 'f',
00545     0x2E, 0x91, 0xCF, 0x11, 0xA5, 0xD6, 0x28, 0xDB, 0x04, 0xC1, 0x00, 0x00 };
00546 
00547 static const uint8_t guid_wave[16] = { 'w', 'a', 'v', 'e',
00548     0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
00549 
00550 static const uint8_t guid_fmt [16] = { 'f', 'm', 't', ' ',
00551     0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
00552 
00553 static int w64_probe(AVProbeData *p)
00554 {
00555     if (p->buf_size <= 40)
00556         return 0;
00557     if (!memcmp(p->buf,      guid_riff, 16) &&
00558         !memcmp(p->buf + 24, guid_wave, 16))
00559         return AVPROBE_SCORE_MAX;
00560     else
00561         return 0;
00562 }
00563 
00564 static int w64_read_header(AVFormatContext *s)
00565 {
00566     int64_t size;
00567     AVIOContext *pb  = s->pb;
00568     WAVDemuxContext    *wav = s->priv_data;
00569     AVStream *st;
00570     uint8_t guid[16];
00571     int ret;
00572 
00573     avio_read(pb, guid, 16);
00574     if (memcmp(guid, guid_riff, 16))
00575         return -1;
00576 
00577     if (avio_rl64(pb) < 16 + 8 + 16 + 8 + 16 + 8) /* riff + wave + fmt + sizes */
00578         return -1;
00579 
00580     avio_read(pb, guid, 16);
00581     if (memcmp(guid, guid_wave, 16)) {
00582         av_log(s, AV_LOG_ERROR, "could not find wave guid\n");
00583         return -1;
00584     }
00585 
00586     size = find_guid(pb, guid_fmt);
00587     if (size < 0) {
00588         av_log(s, AV_LOG_ERROR, "could not find fmt guid\n");
00589         return -1;
00590     }
00591 
00592     st = avformat_new_stream(s, NULL);
00593     if (!st)
00594         return AVERROR(ENOMEM);
00595 
00596     /* subtract chunk header size - normal wav file doesn't count it */
00597     ret = ff_get_wav_header(pb, st->codec, size - 24);
00598     if (ret < 0)
00599         return ret;
00600     avio_skip(pb, FFALIGN(size, INT64_C(8)) - size);
00601 
00602     handle_stream_probing(st);
00603     st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
00604 
00605     avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
00606 
00607     size = find_guid(pb, guid_data);
00608     if (size < 0) {
00609         av_log(s, AV_LOG_ERROR, "could not find data guid\n");
00610         return -1;
00611     }
00612     wav->data_end = avio_tell(pb) + size - 24;
00613     wav->w64      = 1;
00614 
00615     return 0;
00616 }
00617 
00618 AVInputFormat ff_w64_demuxer = {
00619     .name           = "w64",
00620     .long_name      = NULL_IF_CONFIG_SMALL("Sony Wave64"),
00621     .priv_data_size = sizeof(WAVDemuxContext),
00622     .read_probe     = w64_probe,
00623     .read_header    = w64_read_header,
00624     .read_packet    = wav_read_packet,
00625     .read_seek      = wav_read_seek,
00626     .flags          = AVFMT_GENERIC_INDEX,
00627     .codec_tag      = (const AVCodecTag* const []){ ff_codec_wav_tags, 0 },
00628 };
00629 #endif /* CONFIG_W64_DEMUXER */