diff options
Diffstat (limited to 'libavformat/wav.c')
-rw-r--r-- | libavformat/wav.c | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/libavformat/wav.c b/libavformat/wav.c index 3914610..c908619 100644 --- a/libavformat/wav.c +++ b/libavformat/wav.c @@ -23,22 +23,82 @@ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ +#include "libavutil/log.h" #include "libavutil/mathematics.h" +#include "libavutil/opt.h" #include "avformat.h" #include "avio_internal.h" #include "pcm.h" #include "riff.h" +#include "avio.h" +#include "avio_internal.h" typedef struct { + const AVClass *class; int64_t data; int64_t data_end; int64_t minpts; int64_t maxpts; int last_duration; int w64; + int write_bext; } WAVContext; #if CONFIG_WAV_MUXER +static inline void bwf_write_bext_string(AVFormatContext *s, const char *key, int maxlen) +{ + AVDictionaryEntry *tag; + int len = 0; + + if (tag = av_dict_get(s->metadata, key, NULL, 0)) { + len = strlen(tag->value); + len = FFMIN(len, maxlen); + avio_write(s->pb, tag->value, len); + } + + ffio_fill(s->pb, 0, maxlen - len); +} + +static void bwf_write_bext_chunk(AVFormatContext *s) +{ + AVDictionaryEntry *tmp_tag; + uint64_t time_reference = 0; + int64_t bext = ff_start_tag(s->pb, "bext"); + + bwf_write_bext_string(s, "description", 256); + bwf_write_bext_string(s, "originator", 32); + bwf_write_bext_string(s, "originator_reference", 32); + bwf_write_bext_string(s, "origination_date", 10); + bwf_write_bext_string(s, "origination_time", 8); + + if (tmp_tag = av_dict_get(s->metadata, "time_reference", NULL, 0)) + time_reference = strtoll(tmp_tag->value, NULL, 10); + avio_wl64(s->pb, time_reference); + avio_wl16(s->pb, 1); // set version to 1 + + if (tmp_tag = av_dict_get(s->metadata, "umid", NULL, 0)) { + unsigned char umidpart_str[17] = {0}; + int i; + uint64_t umidpart; + int len = strlen(tmp_tag->value+2); + + for (i = 0; i < len/16; i++) { + memcpy(umidpart_str, tmp_tag->value + 2 + (i*16), 16); + umidpart = strtoll(umidpart_str, NULL, 16); + avio_wb64(s->pb, umidpart); + } + ffio_fill(s->pb, 0, 64 - i*8); + } else + ffio_fill(s->pb, 0, 64); // zero UMID + + ffio_fill(s->pb, 0, 190); // Reserved + + if (tmp_tag = av_dict_get(s->metadata, "coding_history", NULL, 0)) + avio_put_str(s->pb, tmp_tag->value); + + ff_end_tag(s->pb, bext); +} + static int wav_write_header(AVFormatContext *s) { WAVContext *wav = s->priv_data; @@ -65,6 +125,9 @@ static int wav_write_header(AVFormatContext *s) ff_end_tag(pb, fact); } + if (wav->write_bext) + bwf_write_bext_chunk(s); + av_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate); wav->maxpts = wav->last_duration = 0; wav->minpts = INT64_MAX; @@ -125,6 +188,20 @@ static int wav_write_trailer(AVFormatContext *s) return 0; } +#define OFFSET(x) offsetof(WAVContext, x) +#define ENC AV_OPT_FLAG_ENCODING_PARAM +static const AVOption options[] = { + { "write_bext", "Write BEXT chunk.", OFFSET(write_bext), FF_OPT_TYPE_INT, { 0 }, 0, 1, ENC }, + { NULL }, +}; + +static const AVClass wav_muxer_class = { + .class_name = "WAV muxer", + .item_name = av_default_item_name, + .option = options, + .version = LIBAVUTIL_VERSION_INT, +}; + AVOutputFormat ff_wav_muxer = { "wav", NULL_IF_CONFIG_SMALL("WAV format"), @@ -137,6 +214,7 @@ AVOutputFormat ff_wav_muxer = { wav_write_packet, wav_write_trailer, .codec_tag= (const AVCodecTag* const []){ff_codec_wav_tags, 0}, + .priv_class = &wav_muxer_class, }; #endif /* CONFIG_WAV_MUXER */ |