static int write_header(AVFormatContext *s) { AVIOContext *pb = s->pb; WtvContext *wctx = s->priv_data; int i, pad, ret; AVStream *st; wctx->last_chunk_pos = -1; wctx->last_timestamp_pos = -1; ff_put_guid(pb, &ff_wtv_guid); ff_put_guid(pb, &sub_wtv_guid); avio_wl32(pb, 0x01); avio_wl32(pb, 0x02); avio_wl32(pb, 1 << WTV_SECTOR_BITS); avio_wl32(pb, 1 << WTV_BIGSECTOR_BITS); //write initial root fields avio_wl32(pb, 0); // root_size, update later write_pad(pb, 4); avio_wl32(pb, 0); // root_sector, update it later. write_pad(pb, 32); avio_wl32(pb, 0); // file ends pointer, update it later. pad = (1 << WTV_SECTOR_BITS) - avio_tell(pb); write_pad(pb, pad); wctx->timeline_start_pos = avio_tell(pb); wctx->serial = 1; wctx->last_chunk_pos = -1; wctx->first_video_flag = 1; for (i = 0; i < s->nb_streams; i++) { st = s->streams[i]; ret = write_stream_codec(s, st); if (ret < 0) { av_log(s, AV_LOG_ERROR, "write stream codec failed codec_type(0x%x)\n", st->codec->codec_type); return -1; } if (!i) write_sync(s); } for (i = 0; i < s->nb_streams; i++) { st = s->streams[i]; ret = write_stream_data(s, st); if (ret < 0) { av_log(s, AV_LOG_ERROR, "write stream data failed codec_type(0x%x)\n", st->codec->codec_type); return -1; } } if (wctx->nb_index) write_index(s); return 0; }
static int write_stream_codec_info(AVFormatContext *s, AVStream *st) { WtvContext *wctx = s->priv_data; const ff_asf_guid *g, *media_type, *format_type; AVIOContext *pb = s->pb; int64_t hdr_pos_start; int hdr_size = 0; if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { g = get_codec_guid(st->codec->codec_id, ff_video_guids); media_type = &ff_mediatype_video; format_type = &ff_format_mpeg2_video; } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { g = get_codec_guid(st->codec->codec_id, ff_codec_wav_guids); media_type = &ff_mediatype_audio; format_type = &ff_format_waveformatex; } else { av_log(s, AV_LOG_ERROR, "unknown codec_type (0x%x)\n", st->codec->codec_type); return -1; } if (g == NULL) { av_log(s, AV_LOG_ERROR, "can't get video codec_id (0x%x) guid.\n", st->codec->codec_id); return -1; } ff_put_guid(pb, media_type); // mediatype ff_put_guid(pb, &ff_mediasubtype_cpfilters_processed); // subtype write_pad(pb, 12); ff_put_guid(pb,&ff_format_cpfilters_processed); // format type avio_wl32(pb, 0); // size hdr_pos_start = avio_tell(pb); if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { if (wctx->first_video_flag) { write_pad(pb, 216); //The size is sensitive. wctx->first_video_flag = 0; } else { write_pad(pb, 72); // aspect ratio ff_put_bmp_header(pb, st->codec, ff_codec_bmp_tags, 0); } } else { ff_put_wav_header(pb, st->codec); } hdr_size = avio_tell(pb) - hdr_pos_start; // seek back write hdr_size avio_seek(pb, -(hdr_size + 4), SEEK_CUR); avio_wl32(pb, hdr_size + 32); avio_seek(pb, hdr_size, SEEK_CUR); ff_put_guid(pb, g); // actual_subtype ff_put_guid(pb, format_type); // actual_formattype return 0; }
static int write_stream_codec_info(AVFormatContext *s, AVStream *st) { const ff_asf_guid *g, *media_type, *format_type; const AVCodecTag *tags; AVIOContext *pb = s->pb; int64_t hdr_pos_start; int hdr_size = 0; if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { g = ff_get_codec_guid(st->codec->codec_id, ff_video_guids); media_type = &ff_mediatype_video; format_type = st->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO ? &ff_format_mpeg2_video : &ff_format_videoinfo2; tags = ff_codec_bmp_tags; } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { g = ff_get_codec_guid(st->codec->codec_id, ff_codec_wav_guids); media_type = &ff_mediatype_audio; format_type = &ff_format_waveformatex; tags = ff_codec_wav_tags; } else { av_log(s, AV_LOG_ERROR, "unknown codec_type (0x%x)\n", st->codec->codec_type); return -1; } ff_put_guid(pb, media_type); // mediatype ff_put_guid(pb, &ff_mediasubtype_cpfilters_processed); // subtype write_pad(pb, 12); ff_put_guid(pb,&ff_format_cpfilters_processed); // format type avio_wl32(pb, 0); // size hdr_pos_start = avio_tell(pb); if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { put_videoinfoheader2(pb, st); } else { if (ff_put_wav_header(pb, st->codec, 0) < 0) format_type = &ff_format_none; } hdr_size = avio_tell(pb) - hdr_pos_start; // seek back write hdr_size avio_seek(pb, -(hdr_size + 4), SEEK_CUR); avio_wl32(pb, hdr_size + 32); avio_seek(pb, hdr_size, SEEK_CUR); if (g) { ff_put_guid(pb, g); // actual_subtype } else { int tag = ff_codec_get_tag(tags, st->codec->codec_id); if (!tag) { av_log(s, AV_LOG_ERROR, "unsupported codec_id (0x%x)\n", st->codec->codec_id); return -1; } avio_wl32(pb, tag); avio_write(pb, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12); }
static int64_t put_header(AVIOContext *pb, const ff_asf_guid *g) { int64_t pos; pos = avio_tell(pb); ff_put_guid(pb, g); avio_wl64(pb, 24); return pos; }
static int asf_write_index(AVFormatContext *s, ASFIndex *index, uint16_t max, uint32_t count) { AVIOContext *pb = s->pb; int i; ff_put_guid(pb, &ff_asf_simple_index_header); avio_wl64(pb, 24 + 16 + 8 + 4 + 4 + (4 + 2)*count); ff_put_guid(pb, &ff_asf_my_guid); avio_wl64(pb, ASF_INDEXED_INTERVAL); avio_wl32(pb, max); avio_wl32(pb, count); for(i=0; i<count; i++) { avio_wl32(pb, index[i].packet_number); avio_wl16(pb, index[i].packet_count); } return 0; }
static int write_root_table(AVFormatContext *s, int64_t sector_pos) { AVIOContext *pb = s->pb; WtvContext *wctx = s->priv_data; int size, pad; int i; const WTVRootEntryTable *h = wtv_root_entry_table; for (i = 0; i < sizeof(wtv_root_entry_table)/sizeof(WTVRootEntryTable); i++, h++) { WtvFile *w = &wctx->file[i]; int filename_padding = WTV_PAD8(h->header_size) - h->header_size; WTVHeaderWriteFunc *write = h->write_header; int len = 0; int64_t len_pos; ff_put_guid(pb, &ff_dir_entry_guid); len_pos = avio_tell(pb); avio_wl16(pb, 40 + h->header_size + filename_padding + 8); // maybe updated later write_pad(pb, 6); avio_wl64(pb, write ? 0 : w->length);// maybe update later avio_wl32(pb, (h->header_size + filename_padding) >> 1); write_pad(pb, 4); avio_write(pb, h->header, h->header_size); write_pad(pb, filename_padding); if (write) { len = write(pb); // update length field avio_seek(pb, len_pos, SEEK_SET); avio_wl64(pb, 40 + h->header_size + filename_padding + len); avio_wl64(pb, len |(1ULL<<62) | (1ULL<<60)); avio_seek(pb, 8 + h->header_size + filename_padding + len, SEEK_CUR); } else { avio_wl32(pb, w->first_sector); avio_wl32(pb, w->depth); } } // caculate root table size size = avio_tell(pb) - sector_pos; pad = WTV_SECTOR_SIZE- size; write_pad(pb, pad); return size; }
static int asf_write_markers(AVFormatContext *s) { ASFContext *asf = s->priv_data; AVIOContext *pb = s->pb; int i; AVRational scale = {1, 10000000}; int64_t hpos = put_header(pb, &ff_asf_marker_header); ff_put_guid(pb, &ff_asf_reserved_4);// ASF spec mandates this reserved value avio_wl32(pb, s->nb_chapters); // markers count avio_wl16(pb, 0); // ASF spec mandates 0 for this avio_wl16(pb, 0); // name length 0, no name given for (i = 0; i < s->nb_chapters; i++) { AVChapter *c = s->chapters[i]; AVDictionaryEntry *t = av_dict_get(c->metadata, "title", NULL, 0); int64_t pres_time = av_rescale_q(c->start, c->time_base, scale); uint64_t offset; int32_t send_time = get_send_time(asf, pres_time, &offset); int len = 0; uint8_t *buf; AVIOContext *dyn_buf; if (t) { if (avio_open_dyn_buf(&dyn_buf) < 0) return AVERROR(ENOMEM); avio_put_str16le(dyn_buf, t->value); len = avio_close_dyn_buf(dyn_buf, &buf); } avio_wl64(pb, offset); // offset of the packet with send_time avio_wl64(pb, pres_time + PREROLL_TIME * 10000); // presentation time avio_wl16(pb, 12 + len); // entry length avio_wl32(pb, send_time); // send time avio_wl32(pb, 0); // flags, should be 0 avio_wl32(pb, len / 2); // marker desc length in WCHARS! if (t) { avio_write(pb, buf, len); // marker desc av_freep(&buf); } } end_header(pb, hpos); return 0; }
/** * Write chunk header. If header chunk (0x80000000 set) then add to list of header chunks */ static void write_chunk_header(AVFormatContext *s, const ff_asf_guid *guid, int length, int stream_id) { WtvContext *wctx = s->priv_data; AVIOContext *pb = s->pb; wctx->last_chunk_pos = avio_tell(pb) - wctx->timeline_start_pos; ff_put_guid(pb, guid); avio_wl32(pb, 32 + length); avio_wl32(pb, stream_id); avio_wl64(pb, wctx->serial); if ((stream_id & 0x80000000) && guid != &ff_index_guid) { WtvChunkEntry *t = wctx->index + wctx->nb_index; av_assert0(wctx->nb_index < MAX_NB_INDEX); t->pos = wctx->last_chunk_pos; t->serial = wctx->serial; t->guid = guid; t->stream_id = stream_id & 0x3FFFFFFF; wctx->nb_index++; } }
static void write_index(AVFormatContext *s) { AVIOContext *pb = s->pb; WtvContext *wctx = s->priv_data; int i; write_chunk_header2(s, &index_guid, 0x80000000); avio_wl32(pb, 0); avio_wl32(pb, 0); for (i = 0; i < wctx->nb_index; i++) { WtvChunkEntry *t = wctx->index + i; ff_put_guid(pb, t->guid); avio_wl64(pb, t->pos); avio_wl32(pb, t->stream_id); avio_wl32(pb, 0); // checksum? avio_wl64(pb, t->serial); } wctx->nb_index = 0; // reset index finish_chunk_noindex(s); }
/* write the header (used two times if non streamed) */ static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data_chunk_size) { ASFContext *asf = s->priv_data; AVIOContext *pb = s->pb; AVDictionaryEntry *tags[5]; int header_size, n, extra_size, extra_size2, wav_extra_size, file_time; int has_title, has_aspect_ratio = 0; int metadata_count; AVCodecContext *enc; int64_t header_offset, cur_pos, hpos; int bit_rate; int64_t duration; ff_metadata_conv(&s->metadata, ff_asf_metadata_conv, NULL); tags[0] = av_dict_get(s->metadata, "title", NULL, 0); tags[1] = av_dict_get(s->metadata, "author", NULL, 0); tags[2] = av_dict_get(s->metadata, "copyright", NULL, 0); tags[3] = av_dict_get(s->metadata, "comment", NULL, 0); tags[4] = av_dict_get(s->metadata, "rating", NULL, 0); duration = asf->duration + PREROLL_TIME * 10000; has_title = tags[0] || tags[1] || tags[2] || tags[3] || tags[4]; metadata_count = av_dict_count(s->metadata); bit_rate = 0; for (n = 0; n < s->nb_streams; n++) { enc = s->streams[n]->codec; avpriv_set_pts_info(s->streams[n], 32, 1, 1000); /* 32 bit pts in ms */ bit_rate += enc->bit_rate; if ( enc->codec_type == AVMEDIA_TYPE_VIDEO && enc->sample_aspect_ratio.num > 0 && enc->sample_aspect_ratio.den > 0) has_aspect_ratio++; } if (asf->is_streamed) { put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */ } ff_put_guid(pb, &ff_asf_header); avio_wl64(pb, -1); /* header length, will be patched after */ avio_wl32(pb, 3 + has_title + !!metadata_count + s->nb_streams); /* number of chunks in header */ avio_w8(pb, 1); /* ??? */ avio_w8(pb, 2); /* ??? */ /* file header */ header_offset = avio_tell(pb); hpos = put_header(pb, &ff_asf_file_header); ff_put_guid(pb, &ff_asf_my_guid); avio_wl64(pb, file_size); file_time = 0; avio_wl64(pb, unix_to_file_time(file_time)); avio_wl64(pb, asf->nb_packets); /* number of packets */ avio_wl64(pb, duration); /* end time stamp (in 100ns units) */ avio_wl64(pb, asf->duration); /* duration (in 100ns units) */ avio_wl64(pb, PREROLL_TIME); /* start time stamp */ avio_wl32(pb, (asf->is_streamed || !pb->seekable) ? 3 : 2); /* ??? */ avio_wl32(pb, s->packet_size); /* packet size */ avio_wl32(pb, s->packet_size); /* packet size */ avio_wl32(pb, bit_rate ? bit_rate : -1); /* Maximum data rate in bps */ end_header(pb, hpos); /* unknown headers */ hpos = put_header(pb, &ff_asf_head1_guid); ff_put_guid(pb, &ff_asf_head2_guid); avio_wl16(pb, 6); if (has_aspect_ratio) { int64_t hpos2; avio_wl32(pb, 26 + has_aspect_ratio * 84); hpos2 = put_header(pb, &ff_asf_metadata_header); avio_wl16(pb, 2 * has_aspect_ratio); for (n = 0; n < s->nb_streams; n++) { enc = s->streams[n]->codec; if ( enc->codec_type == AVMEDIA_TYPE_VIDEO && enc->sample_aspect_ratio.num > 0 && enc->sample_aspect_ratio.den > 0) { AVRational sar = enc->sample_aspect_ratio; avio_wl16(pb, 0); // the stream number is set like this below avio_wl16(pb, n + 1); avio_wl16(pb, 26); // name_len avio_wl16(pb, 3); // value_type avio_wl32(pb, 4); // value_len avio_put_str16le(pb, "AspectRatioX"); avio_wl32(pb, sar.num); avio_wl16(pb, 0); // the stream number is set like this below avio_wl16(pb, n + 1); avio_wl16(pb, 26); // name_len avio_wl16(pb, 3); // value_type avio_wl32(pb, 4); // value_len avio_put_str16le(pb, "AspectRatioY"); avio_wl32(pb, sar.den); } } end_header(pb, hpos2); } else { avio_wl32(pb, 0); } end_header(pb, hpos); /* title and other infos */ if (has_title) { int len; uint8_t *buf; AVIOContext *dyn_buf; if (avio_open_dyn_buf(&dyn_buf) < 0) return AVERROR(ENOMEM); hpos = put_header(pb, &ff_asf_comment_header); for (n = 0; n < FF_ARRAY_ELEMS(tags); n++) { len = tags[n] ? avio_put_str16le(dyn_buf, tags[n]->value) : 0; avio_wl16(pb, len); } len = avio_close_dyn_buf(dyn_buf, &buf); avio_write(pb, buf, len); av_freep(&buf); end_header(pb, hpos); } if (metadata_count) { AVDictionaryEntry *tag = NULL; hpos = put_header(pb, &ff_asf_extended_content_header); avio_wl16(pb, metadata_count); while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) { put_str16(pb, tag->key); avio_wl16(pb, 0); put_str16(pb, tag->value); } end_header(pb, hpos); } /* chapters using ASF markers */ if (!asf->is_streamed && s->nb_chapters) { int ret; if (ret = asf_write_markers(s)) return ret; } /* stream headers */ for (n = 0; n < s->nb_streams; n++) { int64_t es_pos; // ASFStream *stream = &asf->streams[n]; enc = s->streams[n]->codec; asf->streams[n].num = n + 1; asf->streams[n].seq = 1; switch (enc->codec_type) { case AVMEDIA_TYPE_AUDIO: wav_extra_size = 0; extra_size = 18 + wav_extra_size; extra_size2 = 8; break; default: case AVMEDIA_TYPE_VIDEO: wav_extra_size = enc->extradata_size; extra_size = 0x33 + wav_extra_size; extra_size2 = 0; break; } hpos = put_header(pb, &ff_asf_stream_header); if (enc->codec_type == AVMEDIA_TYPE_AUDIO) { ff_put_guid(pb, &ff_asf_audio_stream); ff_put_guid(pb, &ff_asf_audio_conceal_spread); } else { ff_put_guid(pb, &ff_asf_video_stream); ff_put_guid(pb, &ff_asf_video_conceal_none); } avio_wl64(pb, 0); /* ??? */ es_pos = avio_tell(pb); avio_wl32(pb, extra_size); /* wav header len */ avio_wl32(pb, extra_size2); /* additional data len */ avio_wl16(pb, n + 1); /* stream number */ avio_wl32(pb, 0); /* ??? */ if (enc->codec_type == AVMEDIA_TYPE_AUDIO) { /* WAVEFORMATEX header */ int wavsize = ff_put_wav_header(pb, enc, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX); if (wavsize < 0) return -1; if (wavsize != extra_size) { cur_pos = avio_tell(pb); avio_seek(pb, es_pos, SEEK_SET); avio_wl32(pb, wavsize); /* wav header len */ avio_seek(pb, cur_pos, SEEK_SET); } /* ERROR Correction */ avio_w8(pb, 0x01); if (enc->codec_id == AV_CODEC_ID_ADPCM_G726 || !enc->block_align) { avio_wl16(pb, 0x0190); avio_wl16(pb, 0x0190); } else { avio_wl16(pb, enc->block_align); avio_wl16(pb, enc->block_align); } avio_wl16(pb, 0x01); avio_w8(pb, 0x00); } else { avio_wl32(pb, enc->width); avio_wl32(pb, enc->height); avio_w8(pb, 2); /* ??? */ avio_wl16(pb, 40 + enc->extradata_size); /* size */ /* BITMAPINFOHEADER header */ ff_put_bmp_header(pb, enc, ff_codec_bmp_tags, 1, 0); } end_header(pb, hpos); } /* media comments */ hpos = put_header(pb, &ff_asf_codec_comment_header); ff_put_guid(pb, &ff_asf_codec_comment1_header); avio_wl32(pb, s->nb_streams); for (n = 0; n < s->nb_streams; n++) { const AVCodecDescriptor *codec_desc; const char *desc; enc = s->streams[n]->codec; codec_desc = avcodec_descriptor_get(enc->codec_id); if (enc->codec_type == AVMEDIA_TYPE_AUDIO) avio_wl16(pb, 2); else if (enc->codec_type == AVMEDIA_TYPE_VIDEO) avio_wl16(pb, 1); else avio_wl16(pb, -1); if (enc->codec_id == AV_CODEC_ID_WMAV2) desc = "Windows Media Audio V8"; else desc = codec_desc ? codec_desc->name : NULL; if (desc) { AVIOContext *dyn_buf; uint8_t *buf; int len; if (avio_open_dyn_buf(&dyn_buf) < 0) return AVERROR(ENOMEM); avio_put_str16le(dyn_buf, desc); len = avio_close_dyn_buf(dyn_buf, &buf); avio_wl16(pb, len / 2); // "number of characters" = length in bytes / 2 avio_write(pb, buf, len); av_freep(&buf); } else avio_wl16(pb, 0); avio_wl16(pb, 0); /* no parameters */ /* id */ if (enc->codec_type == AVMEDIA_TYPE_AUDIO) { avio_wl16(pb, 2); avio_wl16(pb, enc->codec_tag); } else { avio_wl16(pb, 4); avio_wl32(pb, enc->codec_tag); } if (!enc->codec_tag) return -1; } end_header(pb, hpos); /* patch the header size fields */ cur_pos = avio_tell(pb); header_size = cur_pos - header_offset; if (asf->is_streamed) { header_size += 8 + 30 + DATA_HEADER_SIZE; avio_seek(pb, header_offset - 10 - 30, SEEK_SET); avio_wl16(pb, header_size); avio_seek(pb, header_offset - 2 - 30, SEEK_SET); avio_wl16(pb, header_size); header_size -= 8 + 30 + DATA_HEADER_SIZE; } header_size += 24 + 6; avio_seek(pb, header_offset - 14, SEEK_SET); avio_wl64(pb, header_size); avio_seek(pb, cur_pos, SEEK_SET); /* movie chunk, followed by packets of packet_size */ asf->data_offset = cur_pos; ff_put_guid(pb, &ff_asf_data_header); avio_wl64(pb, data_chunk_size); ff_put_guid(pb, &ff_asf_my_guid); avio_wl64(pb, asf->nb_packets); /* nb packets */ avio_w8(pb, 1); /* ??? */ avio_w8(pb, 1); /* ??? */ return 0; }
/* returns the size or -1 on error */ int ff_put_wav_header(AVIOContext *pb, AVCodecContext *enc, int flags) { int bps, blkalign, bytespersec, frame_size; int hdrsize; int64_t hdrstart = avio_tell(pb); int waveformatextensible; uint8_t temp[256]; uint8_t *riff_extradata = temp; uint8_t *riff_extradata_start = temp; if (!enc->codec_tag || enc->codec_tag > 0xffff) return -1; /* We use the known constant frame size for the codec if known, otherwise * fall back on using AVCodecContext.frame_size, which is not as reliable * for indicating packet duration. */ frame_size = av_get_audio_frame_duration(enc, enc->block_align); waveformatextensible = (enc->channels > 2 && enc->channel_layout) || enc->sample_rate > 48000 || enc->codec_id == AV_CODEC_ID_EAC3 || av_get_bits_per_sample(enc->codec_id) > 16; if (waveformatextensible) avio_wl16(pb, 0xfffe); else avio_wl16(pb, enc->codec_tag); avio_wl16(pb, enc->channels); avio_wl32(pb, enc->sample_rate); if (enc->codec_id == AV_CODEC_ID_ATRAC3 || enc->codec_id == AV_CODEC_ID_G723_1 || enc->codec_id == AV_CODEC_ID_MP2 || enc->codec_id == AV_CODEC_ID_MP3 || enc->codec_id == AV_CODEC_ID_GSM_MS) { bps = 0; } else { if (!(bps = av_get_bits_per_sample(enc->codec_id))) { if (enc->bits_per_coded_sample) bps = enc->bits_per_coded_sample; else bps = 16; // default to 16 } } if (bps != enc->bits_per_coded_sample && enc->bits_per_coded_sample) { av_log(enc, AV_LOG_WARNING, "requested bits_per_coded_sample (%d) " "and actually stored (%d) differ\n", enc->bits_per_coded_sample, bps); } if (enc->codec_id == AV_CODEC_ID_MP2) { blkalign = (144 * enc->bit_rate - 1)/enc->sample_rate + 1; } else if (enc->codec_id == AV_CODEC_ID_MP3) { blkalign = 576 * (enc->sample_rate <= (24000 + 32000)/2 ? 1 : 2); } else if (enc->codec_id == AV_CODEC_ID_AC3) { blkalign = 3840; /* maximum bytes per frame */ } else if (enc->codec_id == AV_CODEC_ID_AAC) { blkalign = 768 * enc->channels; /* maximum bytes per frame */ } else if (enc->codec_id == AV_CODEC_ID_G723_1) { blkalign = 24; } else if (enc->block_align != 0) { /* specified by the codec */ blkalign = enc->block_align; } else blkalign = bps * enc->channels / av_gcd(8, bps); if (enc->codec_id == AV_CODEC_ID_PCM_U8 || enc->codec_id == AV_CODEC_ID_PCM_S24LE || enc->codec_id == AV_CODEC_ID_PCM_S32LE || enc->codec_id == AV_CODEC_ID_PCM_F32LE || enc->codec_id == AV_CODEC_ID_PCM_F64LE || enc->codec_id == AV_CODEC_ID_PCM_S16LE) { bytespersec = enc->sample_rate * blkalign; } else if (enc->codec_id == AV_CODEC_ID_G723_1) { bytespersec = 800; } else { bytespersec = enc->bit_rate / 8; } avio_wl32(pb, bytespersec); /* bytes per second */ avio_wl16(pb, blkalign); /* block align */ avio_wl16(pb, bps); /* bits per sample */ if (enc->codec_id == AV_CODEC_ID_MP3) { bytestream_put_le16(&riff_extradata, 1); /* wID */ bytestream_put_le32(&riff_extradata, 2); /* fdwFlags */ bytestream_put_le16(&riff_extradata, 1152); /* nBlockSize */ bytestream_put_le16(&riff_extradata, 1); /* nFramesPerBlock */ bytestream_put_le16(&riff_extradata, 1393); /* nCodecDelay */ } else if (enc->codec_id == AV_CODEC_ID_MP2) { /* fwHeadLayer */ bytestream_put_le16(&riff_extradata, 2); /* dwHeadBitrate */ bytestream_put_le32(&riff_extradata, enc->bit_rate); /* fwHeadMode */ bytestream_put_le16(&riff_extradata, enc->channels == 2 ? 1 : 8); /* fwHeadModeExt */ bytestream_put_le16(&riff_extradata, 0); /* wHeadEmphasis */ bytestream_put_le16(&riff_extradata, 1); /* fwHeadFlags */ bytestream_put_le16(&riff_extradata, 16); /* dwPTSLow */ bytestream_put_le32(&riff_extradata, 0); /* dwPTSHigh */ bytestream_put_le32(&riff_extradata, 0); } else if (enc->codec_id == AV_CODEC_ID_G723_1) { bytestream_put_le32(&riff_extradata, 0x9ace0002); /* extradata needed for msacm g723.1 codec */ bytestream_put_le32(&riff_extradata, 0xaea2f732); bytestream_put_le16(&riff_extradata, 0xacde); } else if (enc->codec_id == AV_CODEC_ID_GSM_MS || enc->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV) { /* wSamplesPerBlock */ bytestream_put_le16(&riff_extradata, frame_size); } else if (enc->extradata_size) { riff_extradata_start = enc->extradata; riff_extradata = enc->extradata + enc->extradata_size; } /* write WAVEFORMATEXTENSIBLE extensions */ if (waveformatextensible) { int write_channel_mask = enc->strict_std_compliance < FF_COMPLIANCE_NORMAL || enc->channel_layout < 0x40000; /* 22 is WAVEFORMATEXTENSIBLE size */ avio_wl16(pb, riff_extradata - riff_extradata_start + 22); /* ValidBitsPerSample || SamplesPerBlock || Reserved */ avio_wl16(pb, bps); /* dwChannelMask */ avio_wl32(pb, write_channel_mask ? enc->channel_layout : 0); /* GUID + next 3 */ if (enc->codec_id == AV_CODEC_ID_EAC3) { ff_put_guid(pb, ff_get_codec_guid(enc->codec_id, ff_codec_wav_guids)); } else { avio_wl32(pb, enc->codec_tag); avio_wl32(pb, 0x00100000); avio_wl32(pb, 0xAA000080); avio_wl32(pb, 0x719B3800); } } else if ((flags & FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX) || enc->codec_tag != 0x0001 /* PCM */ || riff_extradata - riff_extradata_start) { /* WAVEFORMATEX */ avio_wl16(pb, riff_extradata - riff_extradata_start); /* cbSize */ } /* else PCMWAVEFORMAT */ avio_write(pb, riff_extradata_start, riff_extradata - riff_extradata_start); hdrsize = avio_tell(pb) - hdrstart; if (hdrsize & 1) { hdrsize++; avio_w8(pb, 0); } return hdrsize; }
/* write the header (used two times if non streamed) */ static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data_chunk_size) { ASFContext *asf = s->priv_data; AVIOContext *pb = s->pb; AVDictionaryEntry *tags[5]; int header_size, n, extra_size, extra_size2, wav_extra_size; int has_title, has_aspect_ratio = 0; int metadata_count; AVCodecParameters *par; int64_t header_offset, cur_pos, hpos; int bit_rate; int64_t duration; int audio_language_counts[128] = { 0 }; ff_metadata_conv(&s->metadata, ff_asf_metadata_conv, NULL); tags[0] = av_dict_get(s->metadata, "title", NULL, 0); tags[1] = av_dict_get(s->metadata, "author", NULL, 0); tags[2] = av_dict_get(s->metadata, "copyright", NULL, 0); tags[3] = av_dict_get(s->metadata, "comment", NULL, 0); tags[4] = av_dict_get(s->metadata, "rating", NULL, 0); duration = asf->duration + PREROLL_TIME * 10000; has_title = tags[0] || tags[1] || tags[2] || tags[3] || tags[4]; if (!file_size) { if (ff_parse_creation_time_metadata(s, &asf->creation_time, 0) != 0) av_dict_set(&s->metadata, "creation_time", NULL, 0); } metadata_count = av_dict_count(s->metadata); bit_rate = 0; for (n = 0; n < s->nb_streams; n++) { AVDictionaryEntry *entry; par = s->streams[n]->codecpar; avpriv_set_pts_info(s->streams[n], 32, 1, 1000); /* 32 bit pts in ms */ bit_rate += par->bit_rate; if ( par->codec_type == AVMEDIA_TYPE_VIDEO && par->sample_aspect_ratio.num > 0 && par->sample_aspect_ratio.den > 0) has_aspect_ratio++; entry = av_dict_get(s->streams[n]->metadata, "language", NULL, 0); if (entry) { const char *iso6391lang = ff_convert_lang_to(entry->value, AV_LANG_ISO639_1); if (iso6391lang) { int i; for (i = 0; i < asf->nb_languages; i++) { if (!strcmp(asf->languages[i], iso6391lang)) { asf->streams[n].stream_language_index = i; break; } } if (i >= asf->nb_languages) { asf->languages[asf->nb_languages] = iso6391lang; asf->streams[n].stream_language_index = asf->nb_languages; asf->nb_languages++; } if (par->codec_type == AVMEDIA_TYPE_AUDIO) audio_language_counts[asf->streams[n].stream_language_index]++; } } else { asf->streams[n].stream_language_index = 128; } } if (asf->is_streamed) { put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */ } ff_put_guid(pb, &ff_asf_header); avio_wl64(pb, -1); /* header length, will be patched after */ avio_wl32(pb, 3 + has_title + !!metadata_count + s->nb_streams); /* number of chunks in header */ avio_w8(pb, 1); /* ??? */ avio_w8(pb, 2); /* ??? */ /* file header */ header_offset = avio_tell(pb); hpos = put_header(pb, &ff_asf_file_header); ff_put_guid(pb, &ff_asf_my_guid); avio_wl64(pb, file_size); avio_wl64(pb, unix_to_file_time(asf->creation_time)); avio_wl64(pb, asf->nb_packets); /* number of packets */ avio_wl64(pb, duration); /* end time stamp (in 100ns units) */ avio_wl64(pb, asf->duration); /* duration (in 100ns units) */ avio_wl64(pb, PREROLL_TIME); /* start time stamp */ avio_wl32(pb, (asf->is_streamed || !pb->seekable) ? 3 : 2); /* ??? */ avio_wl32(pb, s->packet_size); /* packet size */ avio_wl32(pb, s->packet_size); /* packet size */ avio_wl32(pb, bit_rate ? bit_rate : -1); /* Maximum data rate in bps */ end_header(pb, hpos); /* header_extension */ hpos = put_header(pb, &ff_asf_head1_guid); ff_put_guid(pb, &ff_asf_head2_guid); avio_wl16(pb, 6); avio_wl32(pb, 0); /* length, to be filled later */ if (asf->nb_languages) { int64_t hpos2; int i; int nb_audio_languages = 0; hpos2 = put_header(pb, &ff_asf_language_guid); avio_wl16(pb, asf->nb_languages); for (i = 0; i < asf->nb_languages; i++) { avio_w8(pb, 6); avio_put_str16le(pb, asf->languages[i]); } end_header(pb, hpos2); for (i = 0; i < asf->nb_languages; i++) if (audio_language_counts[i]) nb_audio_languages++; if (nb_audio_languages > 1) { hpos2 = put_header(pb, &ff_asf_group_mutual_exclusion_object); ff_put_guid(pb, &ff_asf_mutex_language); avio_wl16(pb, nb_audio_languages); for (i = 0; i < asf->nb_languages; i++) { if (audio_language_counts[i]) { avio_wl16(pb, audio_language_counts[i]); for (n = 0; n < s->nb_streams; n++) if (asf->streams[n].stream_language_index == i && s->streams[n]->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) avio_wl16(pb, n + 1); } } end_header(pb, hpos2); } for (n = 0; n < s->nb_streams; n++) { int64_t es_pos; if (asf->streams[n].stream_language_index > 127) continue; es_pos = put_header(pb, &ff_asf_extended_stream_properties_object); avio_wl64(pb, 0); /* start time */ avio_wl64(pb, 0); /* end time */ avio_wl32(pb, s->streams[n]->codecpar->bit_rate); /* data bitrate bps */ avio_wl32(pb, 5000); /* buffer size ms */ avio_wl32(pb, 0); /* initial buffer fullness */ avio_wl32(pb, s->streams[n]->codecpar->bit_rate); /* peak data bitrate */ avio_wl32(pb, 5000); /* maximum buffer size ms */ avio_wl32(pb, 0); /* max initial buffer fullness */ avio_wl32(pb, 0); /* max object size */ avio_wl32(pb, (!asf->is_streamed && pb->seekable) << 1); /* flags - seekable */ avio_wl16(pb, n + 1); /* stream number */ avio_wl16(pb, asf->streams[n].stream_language_index); /* language id index */ avio_wl64(pb, 0); /* avg time per frame */ avio_wl16(pb, 0); /* stream name count */ avio_wl16(pb, 0); /* payload extension system count */ end_header(pb, es_pos); } } if (has_aspect_ratio) { int64_t hpos2; hpos2 = put_header(pb, &ff_asf_metadata_header); avio_wl16(pb, 2 * has_aspect_ratio); for (n = 0; n < s->nb_streams; n++) { par = s->streams[n]->codecpar; if ( par->codec_type == AVMEDIA_TYPE_VIDEO && par->sample_aspect_ratio.num > 0 && par->sample_aspect_ratio.den > 0) { AVRational sar = par->sample_aspect_ratio; avio_wl16(pb, 0); // the stream number is set like this below avio_wl16(pb, n + 1); avio_wl16(pb, 26); // name_len avio_wl16(pb, 3); // value_type avio_wl32(pb, 4); // value_len avio_put_str16le(pb, "AspectRatioX"); avio_wl32(pb, sar.num); avio_wl16(pb, 0); // the stream number is set like this below avio_wl16(pb, n + 1); avio_wl16(pb, 26); // name_len avio_wl16(pb, 3); // value_type avio_wl32(pb, 4); // value_len avio_put_str16le(pb, "AspectRatioY"); avio_wl32(pb, sar.den); } } end_header(pb, hpos2); } { int64_t pos1; pos1 = avio_tell(pb); avio_seek(pb, hpos + 42, SEEK_SET); avio_wl32(pb, pos1 - hpos - 46); avio_seek(pb, pos1, SEEK_SET); } end_header(pb, hpos); /* title and other info */ if (has_title) { int len; uint8_t *buf; AVIOContext *dyn_buf; if (avio_open_dyn_buf(&dyn_buf) < 0) return AVERROR(ENOMEM); hpos = put_header(pb, &ff_asf_comment_header); for (n = 0; n < FF_ARRAY_ELEMS(tags); n++) { len = tags[n] ? avio_put_str16le(dyn_buf, tags[n]->value) : 0; avio_wl16(pb, len); } len = avio_close_dyn_buf(dyn_buf, &buf); avio_write(pb, buf, len); av_freep(&buf); end_header(pb, hpos); } if (metadata_count) { AVDictionaryEntry *tag = NULL; hpos = put_header(pb, &ff_asf_extended_content_header); avio_wl16(pb, metadata_count); while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) { put_str16(pb, tag->key); avio_wl16(pb, 0); put_str16(pb, tag->value); } end_header(pb, hpos); } /* chapters using ASF markers */ if (!asf->is_streamed && s->nb_chapters) { int ret; if ((ret = asf_write_markers(s)) < 0) return ret; } /* stream headers */ for (n = 0; n < s->nb_streams; n++) { int64_t es_pos; // ASFStream *stream = &asf->streams[n]; par = s->streams[n]->codecpar; asf->streams[n].num = n + 1; asf->streams[n].seq = 1; switch (par->codec_type) { case AVMEDIA_TYPE_AUDIO: wav_extra_size = 0; extra_size = 18 + wav_extra_size; extra_size2 = 8; break; default: case AVMEDIA_TYPE_VIDEO: wav_extra_size = par->extradata_size; extra_size = 0x33 + wav_extra_size; extra_size2 = 0; break; } hpos = put_header(pb, &ff_asf_stream_header); if (par->codec_type == AVMEDIA_TYPE_AUDIO) { ff_put_guid(pb, &ff_asf_audio_stream); ff_put_guid(pb, &ff_asf_audio_conceal_spread); } else { ff_put_guid(pb, &ff_asf_video_stream); ff_put_guid(pb, &ff_asf_video_conceal_none); } avio_wl64(pb, 0); /* ??? */ es_pos = avio_tell(pb); avio_wl32(pb, extra_size); /* wav header len */ avio_wl32(pb, extra_size2); /* additional data len */ avio_wl16(pb, n + 1); /* stream number */ avio_wl32(pb, 0); /* ??? */ if (par->codec_type == AVMEDIA_TYPE_AUDIO) { /* WAVEFORMATEX header */ int wavsize = ff_put_wav_header(s, pb, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX); if (wavsize < 0) return -1; if (wavsize != extra_size) { cur_pos = avio_tell(pb); avio_seek(pb, es_pos, SEEK_SET); avio_wl32(pb, wavsize); /* wav header len */ avio_seek(pb, cur_pos, SEEK_SET); } /* ERROR Correction */ avio_w8(pb, 0x01); if (par->codec_id == AV_CODEC_ID_ADPCM_G726 || !par->block_align) { avio_wl16(pb, 0x0190); avio_wl16(pb, 0x0190); } else { avio_wl16(pb, par->block_align); avio_wl16(pb, par->block_align); } avio_wl16(pb, 0x01); avio_w8(pb, 0x00); } else { avio_wl32(pb, par->width); avio_wl32(pb, par->height); avio_w8(pb, 2); /* ??? */ avio_wl16(pb, 40 + par->extradata_size); /* size */ /* BITMAPINFOHEADER header */ ff_put_bmp_header(pb, par, ff_codec_bmp_tags, 1, 0); } end_header(pb, hpos); } /* media comments */ hpos = put_header(pb, &ff_asf_codec_comment_header); ff_put_guid(pb, &ff_asf_codec_comment1_header); avio_wl32(pb, s->nb_streams); for (n = 0; n < s->nb_streams; n++) { const AVCodecDescriptor *codec_desc; const char *desc; par = s->streams[n]->codecpar; codec_desc = avcodec_descriptor_get(par->codec_id); if (par->codec_type == AVMEDIA_TYPE_AUDIO) avio_wl16(pb, 2); else if (par->codec_type == AVMEDIA_TYPE_VIDEO) avio_wl16(pb, 1); else avio_wl16(pb, -1); if (par->codec_id == AV_CODEC_ID_WMAV2) desc = "Windows Media Audio V8"; else desc = codec_desc ? codec_desc->name : NULL; if (desc) { AVIOContext *dyn_buf; uint8_t *buf; int len; if (avio_open_dyn_buf(&dyn_buf) < 0) return AVERROR(ENOMEM); avio_put_str16le(dyn_buf, desc); len = avio_close_dyn_buf(dyn_buf, &buf); avio_wl16(pb, len / 2); // "number of characters" = length in bytes / 2 avio_write(pb, buf, len); av_freep(&buf); } else avio_wl16(pb, 0); avio_wl16(pb, 0); /* no parameters */ /* id */ if (par->codec_type == AVMEDIA_TYPE_AUDIO) { avio_wl16(pb, 2); avio_wl16(pb, par->codec_tag); } else { avio_wl16(pb, 4); avio_wl32(pb, par->codec_tag); } if (!par->codec_tag) return -1; } end_header(pb, hpos); /* patch the header size fields */ cur_pos = avio_tell(pb); header_size = cur_pos - header_offset; if (asf->is_streamed) { header_size += 8 + 30 + DATA_HEADER_SIZE; avio_seek(pb, header_offset - 10 - 30, SEEK_SET); avio_wl16(pb, header_size); avio_seek(pb, header_offset - 2 - 30, SEEK_SET); avio_wl16(pb, header_size); header_size -= 8 + 30 + DATA_HEADER_SIZE; } header_size += 24 + 6; avio_seek(pb, header_offset - 14, SEEK_SET); avio_wl64(pb, header_size); avio_seek(pb, cur_pos, SEEK_SET); /* movie chunk, followed by packets of packet_size */ asf->data_offset = cur_pos; ff_put_guid(pb, &ff_asf_data_header); avio_wl64(pb, data_chunk_size); ff_put_guid(pb, &ff_asf_my_guid); avio_wl64(pb, asf->nb_packets); /* nb packets */ avio_w8(pb, 1); /* ??? */ avio_w8(pb, 1); /* ??? */ return 0; }