static int flac_write_header(struct AVFormatContext *s) { int ret; AVCodecContext *codec = s->streams[0]->codec; if (s->nb_streams > 1) { av_log(s, AV_LOG_ERROR, "only one stream is supported\n"); return AVERROR(EINVAL); } if (codec->codec_id != AV_CODEC_ID_FLAC) { av_log(s, AV_LOG_ERROR, "unsupported codec\n"); return AVERROR(EINVAL); } ret = ff_flac_write_header(s->pb, codec, 0); if (ret) return ret; ret = flac_write_block_comment(s->pb, &s->metadata, 0, codec->flags & CODEC_FLAG_BITEXACT); if (ret) return ret; /* The command line flac encoder defaults to placing a seekpoint * every 10s. So one might add padding to allow that later * but there seems to be no simple way to get the duration here. * So let's try the flac default of 8192 bytes */ flac_write_block_padding(s->pb, 8192, 1); return ret; }
static int flac_write_header(struct AVFormatContext *s) { int ret; AVCodecParameters *par = s->streams[0]->codecpar; FlacMuxerContext *c = s->priv_data; if (!c->write_header) return 0; ret = ff_flac_write_header(s->pb, par->extradata, par->extradata_size, 0); if (ret) return ret; /* add the channel layout tag */ if (par->channel_layout && !(par->channel_layout & ~0x3ffffULL) && !ff_flac_is_native_layout(par->channel_layout)) { AVDictionaryEntry *chmask = av_dict_get(s->metadata, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0); if (chmask) { av_log(s, AV_LOG_WARNING, "A WAVEFORMATEXTENSIBLE_CHANNEL_MASK is " "already present, this muxer will not overwrite it.\n"); } else { uint8_t buf[32]; snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout); av_dict_set(&s->metadata, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0); } } ret = flac_write_block_comment(s->pb, &s->metadata, 0, s->flags & AVFMT_FLAG_BITEXACT); if (ret) return ret; /* The command line flac encoder defaults to placing a seekpoint * every 10s. So one might add padding to allow that later * but there seems to be no simple way to get the duration here. * So let's try the flac default of 8192 bytes */ flac_write_block_padding(s->pb, 8192, 1); return ret; }
static int flac_write_header(struct AVFormatContext *s) { int ret; int padding = s->metadata_header_padding; AVCodecContext *codec = s->streams[0]->codec; FlacMuxerContext *c = s->priv_data; if (!c->write_header) return 0; if (s->nb_streams > 1) { av_log(s, AV_LOG_ERROR, "only one stream is supported\n"); return AVERROR(EINVAL); } if (codec->codec_id != AV_CODEC_ID_FLAC) { av_log(s, AV_LOG_ERROR, "unsupported codec\n"); return AVERROR(EINVAL); } if (padding < 0) padding = 8192; /* The FLAC specification states that 24 bits are used to represent the * size of a metadata block so we must clip this value to 2^24-1. */ padding = av_clip_c(padding, 0, 16777215); ret = ff_flac_write_header(s->pb, codec, 0); if (ret) return ret; ret = flac_write_block_comment(s->pb, &s->metadata, !padding, s->flags & AVFMT_FLAG_BITEXACT); if (ret) return ret; /* The command line flac encoder defaults to placing a seekpoint * every 10s. So one might add padding to allow that later * but there seems to be no simple way to get the duration here. * So just add the amount requested by the user. */ if (padding) flac_write_block_padding(s->pb, padding, 1); return ret; }
static int flac_write_header(struct AVFormatContext *s) { int ret; AVCodecContext *codec = s->streams[0]->codec; ret = ff_flac_write_header(s->pb, codec, 0); if (ret) return ret; ret = flac_write_block_comment(s->pb, &s->metadata, 0, codec->flags & CODEC_FLAG_BITEXACT); if (ret) return ret; /* The command line flac encoder defaults to placing a seekpoint * every 10s. So one might add padding to allow that later * but there seems to be no simple way to get the duration here. * So let's try the flac default of 8192 bytes */ flac_write_block_padding(s->pb, 8192, 1); return ret; }
static int flac_write_header(struct AVFormatContext *s) { int ret; int padding = s->metadata_header_padding; AVCodecContext *codec = s->streams[0]->codec; FlacMuxerContext *c = s->priv_data; if (!c->write_header) return 0; if (s->nb_streams > 1) { av_log(s, AV_LOG_ERROR, "only one stream is supported\n"); return AVERROR(EINVAL); } if (codec->codec_id != AV_CODEC_ID_FLAC) { av_log(s, AV_LOG_ERROR, "unsupported codec\n"); return AVERROR(EINVAL); } if (padding < 0) padding = 8192; /* The FLAC specification states that 24 bits are used to represent the * size of a metadata block so we must clip this value to 2^24-1. */ padding = av_clip_uintp2(padding, 24); ret = ff_flac_write_header(s->pb, codec->extradata, codec->extradata_size, 0); if (ret) return ret; /* add the channel layout tag */ if (codec->channel_layout && !(codec->channel_layout & ~0x3ffffULL) && !ff_flac_is_native_layout(codec->channel_layout)) { AVDictionaryEntry *chmask = av_dict_get(s->metadata, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0); if (chmask) { av_log(s, AV_LOG_WARNING, "A WAVEFORMATEXTENSIBLE_CHANNEL_MASK is " "already present, this muxer will not overwrite it.\n"); } else { uint8_t buf[32]; snprintf(buf, sizeof(buf), "0x%"PRIx64, codec->channel_layout); av_dict_set(&s->metadata, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0); } } ret = flac_write_block_comment(s->pb, &s->metadata, !padding, s->flags & AVFMT_FLAG_BITEXACT); if (ret) return ret; /* The command line flac encoder defaults to placing a seekpoint * every 10s. So one might add padding to allow that later * but there seems to be no simple way to get the duration here. * So just add the amount requested by the user. */ if (padding) flac_write_block_padding(s->pb, padding, 1); return ret; }