static int w64_write_header(AVFormatContext *s) { WAVMuxContext *wav = s->priv_data; AVIOContext *pb = s->pb; int64_t start; int ret; avio_write(pb, ff_w64_guid_riff, sizeof(ff_w64_guid_riff)); avio_wl64(pb, -1); avio_write(pb, ff_w64_guid_wave, sizeof(ff_w64_guid_wave)); start_guid(pb, ff_w64_guid_fmt, &start); if ((ret = ff_put_wav_header(pb, s->streams[0]->codec, 0)) < 0) { av_log(s, AV_LOG_ERROR, "%s codec not supported\n", s->streams[0]->codec->codec ? s->streams[0]->codec->codec->name : "NONE"); return ret; } end_guid(pb, start); if (s->streams[0]->codec->codec_tag != 0x01 /* hence for all other than PCM */ && s->pb->seekable) { start_guid(pb, ff_w64_guid_fact, &wav->fact_pos); avio_wl64(pb, 0); end_guid(pb, wav->fact_pos); } start_guid(pb, ff_w64_guid_data, &wav->data); return 0; }
static int w64_write_trailer(AVFormatContext *s) { AVIOContext *pb = s->pb; WAVMuxContext *wav = s->priv_data; int64_t file_size; if (pb->seekable) { end_guid(pb, wav->data); file_size = avio_tell(pb); avio_seek(pb, 16, SEEK_SET); avio_wl64(pb, file_size); if (s->streams[0]->codec->codec_tag != 0x01) { int64_t number_of_samples; number_of_samples = av_rescale(wav->maxpts - wav->minpts + wav->last_duration, s->streams[0]->codec->sample_rate * (int64_t)s->streams[0]->time_base.num, s->streams[0]->time_base.den); avio_seek(pb, wav->fact_pos + 24, SEEK_SET); avio_wl64(pb, number_of_samples); } avio_seek(pb, file_size, SEEK_SET); avio_flush(pb); } return 0; }
static int w64_write_trailer(AVFormatContext *s) { AVIOContext *pb = s->pb; WAVMuxContext *wav = s->priv_data; int64_t file_size; if (pb->seekable) { end_guid(pb, wav->data); file_size = avio_tell(pb); avio_seek(pb, 16, SEEK_SET); avio_wl64(pb, file_size); avio_seek(pb, file_size, SEEK_SET); avio_flush(pb); } return 0; }
static int w64_write_header(AVFormatContext *s) { WAVMuxContext *wav = s->priv_data; AVIOContext *pb = s->pb; int64_t start; int ret; avio_write(pb, ff_w64_guid_riff, sizeof(ff_w64_guid_riff)); avio_wl64(pb, -1); avio_write(pb, ff_w64_guid_wave, sizeof(ff_w64_guid_wave)); start_guid(pb, ff_w64_guid_fmt, &start); if ((ret = ff_put_wav_header(pb, s->streams[0]->codec)) < 0) { av_log(s, AV_LOG_ERROR, "%s codec not supported\n", s->streams[0]->codec->codec ? s->streams[0]->codec->codec->name : "NONE"); return ret; } end_guid(pb, start); start_guid(pb, ff_w64_guid_data, &wav->data); return 0; }