diff options
author | Baptiste Coudurier <baptiste.coudurier@gmail.com> | 2018-03-21 18:37:59 +0300 |
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committer | Baptiste Coudurier <baptiste.coudurier@gmail.com> | 2018-08-22 18:07:35 +0300 |
commit | 130de9142edd8f0ab2001fbedb839649fed0b9b6 (patch) | |
tree | a0d80f98ed8144e5ff22f7b32b9b140f41597069 /libavformat/mxfenc.c | |
parent | 9e61141905b5197c8fbab2a651b4013361c8550f (diff) |
avformat/mxfenc: automatically update descriptors klv size
Diffstat (limited to 'libavformat/mxfenc.c')
-rw-r--r-- | libavformat/mxfenc.c | 80 |
1 files changed, 39 insertions, 41 deletions
diff --git a/libavformat/mxfenc.c b/libavformat/mxfenc.c index 66fd0963a2..7f629dbe53 100644 --- a/libavformat/mxfenc.c +++ b/libavformat/mxfenc.c @@ -1104,14 +1104,16 @@ static void mxf_write_multi_descriptor(AVFormatContext *s) mxf_write_uuid(pb, SubDescriptor, i); } -static void mxf_write_generic_desc(AVFormatContext *s, AVStream *st, const UID key, unsigned size) +static int64_t mxf_write_generic_desc(AVFormatContext *s, AVStream *st, const UID key) { MXFContext *mxf = s->priv_data; MXFStreamContext *sc = st->priv_data; AVIOContext *pb = s->pb; + int64_t pos; avio_write(pb, key, 16); - klv_encode_ber4_length(pb, size+20+8+12+20); + klv_encode_ber4_length(pb, 0); + pos = avio_tell(pb); mxf_write_local_tag(pb, 16, 0x3C0A); mxf_write_uuid(pb, SubDescriptor, st->index); @@ -1136,6 +1138,8 @@ static void mxf_write_generic_desc(AVFormatContext *s, AVStream *st, const UID k mxf_write_local_tag(pb, 16, 0x3004); avio_write(pb, mxf_essence_container_uls[sc->index].container_ul, 16); + + return pos; } static const UID mxf_mpegvideo_descriptor_key = { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }; @@ -1172,7 +1176,7 @@ static int get_trc(UID ul, enum AVColorTransferCharacteristic trc) } } -static void mxf_write_cdci_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size) +static int64_t mxf_write_cdci_common(AVFormatContext *s, AVStream *st, const UID key) { MXFStreamContext *sc = st->priv_data; AVIOContext *pb = s->pb; @@ -1180,25 +1184,10 @@ static void mxf_write_cdci_common(AVFormatContext *s, AVStream *st, const UID ke int stored_height = (st->codecpar->height+15)/16*16; int display_height; int f1, f2; - unsigned desc_size = size+8+8+8+8+8+8+8+5+16+4+12+20+5 + 5*8 + 6; UID transfer_ul = {0}; + int64_t pos = mxf_write_generic_desc(s, st, key); - if (sc->interlaced && sc->field_dominance) - desc_size += 5; - if (sc->signal_standard) - desc_size += 5; - if (sc->interlaced) - desc_size += 8; - if (sc->v_chroma_sub_sample) - desc_size += 8; - if (st->codecpar->color_range != AVCOL_RANGE_UNSPECIFIED) - desc_size += 8 * 3; - if (s->oformat == &ff_mxf_d10_muxer) - desc_size += 8 + 8 + 8; - if (get_trc(transfer_ul, st->codecpar->color_trc) >= 0) - desc_size += 20; - - mxf_write_generic_desc(s, st, key, desc_size); + get_trc(transfer_ul, st->codecpar->color_trc); mxf_write_local_tag(pb, 4, 0x3203); avio_wb32(pb, stored_width); @@ -1352,11 +1341,22 @@ static void mxf_write_cdci_common(AVFormatContext *s, AVStream *st, const UID ke avio_w8(pb, sc->field_dominance); } + return pos; +} + +static void mxf_update_klv_size(AVIOContext *pb, int64_t pos) +{ + int64_t cur_pos = avio_tell(pb); + int size = cur_pos - pos; + avio_seek(pb, pos - 4, SEEK_SET); + klv_encode_ber4_length(pb, size); + avio_seek(pb, cur_pos, SEEK_SET); } static void mxf_write_cdci_desc(AVFormatContext *s, AVStream *st) { - mxf_write_cdci_common(s, st, mxf_cdci_descriptor_key, 0); + int64_t pos = mxf_write_cdci_common(s, st, mxf_cdci_descriptor_key); + mxf_update_klv_size(s->pb, pos); } static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st) @@ -1364,10 +1364,9 @@ static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st) AVIOContext *pb = s->pb; MXFStreamContext *sc = st->priv_data; int profile_and_level = (st->codecpar->profile<<4) | st->codecpar->level; + int64_t pos = mxf_write_cdci_common(s, st, mxf_mpegvideo_descriptor_key); if (st->codecpar->codec_id != AV_CODEC_ID_H264) { - mxf_write_cdci_common(s, st, mxf_mpegvideo_descriptor_key, 8+5); - // bit rate mxf_write_local_tag(pb, 4, 0x8000); avio_wb32(pb, sc->video_bit_rate); @@ -1377,26 +1376,19 @@ static void mxf_write_mpegvideo_desc(AVFormatContext *s, AVStream *st) if (!st->codecpar->profile) profile_and_level |= 0x80; // escape bit avio_w8(pb, profile_and_level); - } else { - mxf_write_cdci_common(s, st, mxf_mpegvideo_descriptor_key, 0); } + + mxf_update_klv_size(pb, pos); } -static void mxf_write_generic_sound_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size) +static int64_t mxf_write_generic_sound_common(AVFormatContext *s, AVStream *st, const UID key) { AVIOContext *pb = s->pb; MXFContext *mxf = s->priv_data; int show_warnings = !mxf->footer_partition_offset; - int duration_size = 0; + int64_t pos = mxf_write_generic_desc(s, st, key); - if (s->oformat == &ff_mxf_opatom_muxer) - duration_size = 12; - if (s->oformat == &ff_mxf_d10_muxer) - size += 5; - - mxf_write_generic_desc(s, st, key, size+duration_size+5+12+8+8); - - if (duration_size > 0) { + if (s->oformat == &ff_mxf_opatom_muxer) { mxf_write_local_tag(pb, 8, 0x3002); avio_wb64(pb, mxf->body_offset / mxf->edit_unit_byte_count); } @@ -1432,13 +1424,14 @@ static void mxf_write_generic_sound_common(AVFormatContext *s, AVStream *st, con mxf_write_local_tag(pb, 4, 0x3D01); avio_wb32(pb, av_get_bits_per_sample(st->codecpar->codec_id)); + + return pos; } -static void mxf_write_wav_common(AVFormatContext *s, AVStream *st, const UID key, unsigned size) +static int64_t mxf_write_wav_common(AVFormatContext *s, AVStream *st, const UID key) { AVIOContext *pb = s->pb; - - mxf_write_generic_sound_common(s, st, key, size+6+8); + int64_t pos = mxf_write_generic_sound_common(s, st, key); mxf_write_local_tag(pb, 2, 0x3D0A); avio_wb16(pb, st->codecpar->block_align); @@ -1446,21 +1439,26 @@ static void mxf_write_wav_common(AVFormatContext *s, AVStream *st, const UID key // avg bytes per sec mxf_write_local_tag(pb, 4, 0x3D09); avio_wb32(pb, st->codecpar->block_align*st->codecpar->sample_rate); + + return pos; } static void mxf_write_wav_desc(AVFormatContext *s, AVStream *st) { - mxf_write_wav_common(s, st, mxf_wav_descriptor_key, 0); + int64_t pos = mxf_write_wav_common(s, st, mxf_wav_descriptor_key); + mxf_update_klv_size(s->pb, pos); } static void mxf_write_aes3_desc(AVFormatContext *s, AVStream *st) { - mxf_write_wav_common(s, st, mxf_aes3_descriptor_key, 0); + int64_t pos = mxf_write_wav_common(s, st, mxf_aes3_descriptor_key); + mxf_update_klv_size(s->pb, pos); } static void mxf_write_generic_sound_desc(AVFormatContext *s, AVStream *st) { - mxf_write_generic_sound_common(s, st, mxf_generic_sound_descriptor_key, 0); + int64_t pos = mxf_write_generic_sound_common(s, st, mxf_generic_sound_descriptor_key); + mxf_update_klv_size(s->pb, pos); } static const uint8_t mxf_indirect_value_utf16le[] = { 0x4c,0x00,0x02,0x10,0x01,0x00,0x00,0x00,0x00,0x06,0x0e,0x2b,0x34,0x01,0x04,0x01,0x01 }; |