From 4ace130ee60163d88e998e717ec903e85d4775d0 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Martin=20Storsj=C3=B6?= Date: Sat, 21 Jan 2012 02:16:34 +0200 Subject: movenc: Support muxing VC1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Martin Storsjö --- libavformat/movenc.c | 167 ++++++++++++++++++++++++++++++++++++++++++++++++++- libavformat/movenc.h | 9 +++ 2 files changed, 175 insertions(+), 1 deletion(-) (limited to 'libavformat') diff --git a/libavformat/movenc.c b/libavformat/movenc.c index 1c68a93..4193ec5 100644 --- a/libavformat/movenc.c +++ b/libavformat/movenc.c @@ -30,6 +30,7 @@ #include "avc.h" #include "libavcodec/get_bits.h" #include "libavcodec/put_bits.h" +#include "libavcodec/vc1.h" #include "internal.h" #include "libavutil/avstring.h" #include "libavutil/intfloat.h" @@ -421,6 +422,98 @@ static int mov_write_wave_tag(AVIOContext *pb, MOVTrack *track) return update_size(pb, pos); } +static int mov_write_dvc1_structs(MOVTrack *track, uint8_t *buf) +{ + uint8_t *unescaped; + const uint8_t *start, *next, *end = track->vos_data + track->vos_len; + int unescaped_size, seq_found = 0; + int level = 0, interlace = 0; + int packet_seq = track->vc1_info.packet_seq; + int packet_entry = track->vc1_info.packet_entry; + int slices = track->vc1_info.slices; + PutBitContext pbc; + + if (track->start_dts == AV_NOPTS_VALUE) { + /* No packets written yet, vc1_info isn't authoritative yet. */ + /* Assume inline sequence and entry headers. This will be + * overwritten at the end if the file is seekable. */ + packet_seq = packet_entry = 1; + } + + unescaped = av_mallocz(track->vos_len + FF_INPUT_BUFFER_PADDING_SIZE); + if (!unescaped) + return AVERROR(ENOMEM); + start = find_next_marker(track->vos_data, end); + for (next = start; next < end; start = next) { + GetBitContext gb; + int size; + next = find_next_marker(start + 4, end); + size = next - start - 4; + if (size <= 0) + continue; + unescaped_size = vc1_unescape_buffer(start + 4, size, unescaped); + init_get_bits(&gb, unescaped, 8 * unescaped_size); + if (AV_RB32(start) == VC1_CODE_SEQHDR) { + int profile = get_bits(&gb, 2); + if (profile != PROFILE_ADVANCED) { + av_free(unescaped); + return AVERROR(ENOSYS); + } + seq_found = 1; + level = get_bits(&gb, 3); + /* chromaformat, frmrtq_postproc, bitrtq_postproc, postprocflag, + * width, height */ + skip_bits_long(&gb, 2 + 3 + 5 + 1 + 2*12); + skip_bits(&gb, 1); /* broadcast */ + interlace = get_bits1(&gb); + skip_bits(&gb, 4); /* tfcntrflag, finterpflag, reserved, psf */ + } + } + if (!seq_found) { + av_free(unescaped); + return AVERROR(ENOSYS); + } + + init_put_bits(&pbc, buf, 7); + /* VC1DecSpecStruc */ + put_bits(&pbc, 4, 12); /* profile - advanced */ + put_bits(&pbc, 3, level); + put_bits(&pbc, 1, 0); /* reserved */ + /* VC1AdvDecSpecStruc */ + put_bits(&pbc, 3, level); + put_bits(&pbc, 1, 0); /* cbr */ + put_bits(&pbc, 6, 0); /* reserved */ + put_bits(&pbc, 1, !interlace); /* no interlace */ + put_bits(&pbc, 1, !packet_seq); /* no multiple seq */ + put_bits(&pbc, 1, !packet_entry); /* no multiple entry */ + put_bits(&pbc, 1, !slices); /* no slice code */ + put_bits(&pbc, 1, 0); /* no bframe */ + put_bits(&pbc, 1, 0); /* reserved */ + put_bits32(&pbc, track->enc->time_base.den); /* framerate */ + flush_put_bits(&pbc); + + av_free(unescaped); + + return 0; +} + +static int mov_write_dvc1_tag(AVIOContext *pb, MOVTrack *track) +{ + uint8_t buf[7] = { 0 }; + int ret; + + if ((ret = mov_write_dvc1_structs(track, buf)) < 0) + return ret; + + avio_wb32(pb, track->vos_len + 8 + sizeof(buf)); + ffio_wfourcc(pb, "dvc1"); + track->vc1_info.struct_offset = avio_tell(pb); + avio_write(pb, buf, sizeof(buf)); + avio_write(pb, track->vos_data, track->vos_len); + + return 0; +} + static int mov_write_glbl_tag(AVIOContext *pb, MOVTrack *track) { avio_wb32(pb, track->vos_len + 8); @@ -625,6 +718,7 @@ static int mp4_get_codec_tag(AVFormatContext *s, MOVTrack *track) else if (track->enc->codec_id == CODEC_ID_AC3) tag = MKTAG('a','c','-','3'); else if (track->enc->codec_id == CODEC_ID_DIRAC) tag = MKTAG('d','r','a','c'); else if (track->enc->codec_id == CODEC_ID_MOV_TEXT) tag = MKTAG('t','x','3','g'); + else if (track->enc->codec_id == CODEC_ID_VC1) tag = MKTAG('v','c','-','1'); else if (track->enc->codec_type == AVMEDIA_TYPE_VIDEO) tag = MKTAG('m','p','4','v'); else if (track->enc->codec_type == AVMEDIA_TYPE_AUDIO) tag = MKTAG('m','p','4','a'); @@ -911,6 +1005,8 @@ static int mov_write_video_tag(AVIOContext *pb, MOVTrack *track) mov_write_uuid_tag_ipod(pb); } else if (track->enc->field_order != AV_FIELD_UNKNOWN) mov_write_fiel_tag(pb, track); + else if (track->enc->codec_id == CODEC_ID_VC1 && track->vos_len > 0) + mov_write_dvc1_tag(pb, track); else if (track->vos_len > 0) mov_write_glbl_tag(pb, track); @@ -2502,6 +2598,63 @@ static int mov_parse_mpeg2_frame(AVPacket *pkt, uint32_t *flags) return 0; } +static void mov_parse_vc1_frame(AVPacket *pkt, MOVTrack *trk, int fragment) +{ + const uint8_t *start, *next, *end = pkt->data + pkt->size; + int seq = 0, entry = 0; + int key = pkt->flags & AV_PKT_FLAG_KEY; + start = find_next_marker(pkt->data, end); + for (next = start; next < end; start = next) { + next = find_next_marker(start + 4, end); + switch (AV_RB32(start)) { + case VC1_CODE_SEQHDR: + seq = 1; + break; + case VC1_CODE_ENTRYPOINT: + entry = 1; + break; + case VC1_CODE_SLICE: + trk->vc1_info.slices = 1; + break; + } + } + if (!trk->entry && !fragment) { + /* First packet in first fragment */ + trk->vc1_info.first_packet_seq = seq; + trk->vc1_info.first_packet_entry = entry; + } else if ((seq && !trk->vc1_info.packet_seq) || + (entry && !trk->vc1_info.packet_entry)) { + int i; + for (i = 0; i < trk->entry; i++) + trk->cluster[i].flags &= ~MOV_SYNC_SAMPLE; + trk->has_keyframes = 0; + if (seq) + trk->vc1_info.packet_seq = 1; + if (entry) + trk->vc1_info.packet_entry = 1; + if (!fragment) { + /* First fragment */ + if ((!seq || trk->vc1_info.first_packet_seq) && + (!entry || trk->vc1_info.first_packet_entry)) { + /* First packet had the same headers as this one, readd the + * sync sample flag. */ + trk->cluster[0].flags |= MOV_SYNC_SAMPLE; + trk->has_keyframes = 1; + } + } + } + if (trk->vc1_info.packet_seq && trk->vc1_info.packet_entry) + key = seq && entry; + else if (trk->vc1_info.packet_seq) + key = seq; + else if (trk->vc1_info.packet_entry) + key = entry; + if (key) { + trk->cluster[trk->entry].flags |= MOV_SYNC_SAMPLE; + trk->has_keyframes++; + } +} + static int mov_flush_fragment(AVFormatContext *s) { MOVMuxContext *mov = s->priv_data; @@ -2725,7 +2878,9 @@ static int mov_write_packet_internal(AVFormatContext *s, AVPacket *pkt) trk->flags |= MOV_TRACK_CTTS; trk->cluster[trk->entry].cts = pkt->pts - pkt->dts; trk->cluster[trk->entry].flags = 0; - if (pkt->flags & AV_PKT_FLAG_KEY) { + if (enc->codec_id == CODEC_ID_VC1) { + mov_parse_vc1_frame(pkt, trk, mov->fragments); + } else if (pkt->flags & AV_PKT_FLAG_KEY) { if (mov->mode == MODE_MOV && enc->codec_id == CODEC_ID_MPEG2VIDEO && trk->entry > 0) { // force sync sample for the first key frame mov_parse_mpeg2_frame(pkt, &trk->cluster[trk->entry].flags); @@ -3033,6 +3188,16 @@ static int mov_write_trailer(AVFormatContext *s) for (i=0; inb_streams; i++) { if (mov->tracks[i].tag == MKTAG('r','t','p',' ')) ff_mov_close_hinting(&mov->tracks[i]); + if (mov->flags & FF_MOV_FLAG_FRAGMENT && + mov->tracks[i].vc1_info.struct_offset && s->pb->seekable) { + int64_t off = avio_tell(pb); + uint8_t buf[7]; + if (mov_write_dvc1_structs(&mov->tracks[i], buf) >= 0) { + avio_seek(pb, mov->tracks[i].vc1_info.struct_offset, SEEK_SET); + avio_write(pb, buf, 7); + avio_seek(pb, off, SEEK_SET); + } + } av_freep(&mov->tracks[i].cluster); av_freep(&mov->tracks[i].frag_info); diff --git a/libavformat/movenc.h b/libavformat/movenc.h index 5fc71fb..b77fc80 100644 --- a/libavformat/movenc.h +++ b/libavformat/movenc.h @@ -120,6 +120,15 @@ typedef struct MOVIndex { int nb_frag_info; MOVFragmentInfo *frag_info; + + struct { + int64_t struct_offset; + int first_packet_seq; + int first_packet_entry; + int packet_seq; + int packet_entry; + int slices; + } vc1_info; } MOVTrack; typedef struct MOVMuxContext { -- cgit v1.1