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avformat/matroskaenc: Write CRC-32 in non-seekable mode

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Given that in both the seekable as well as the non-seekable mode dynamic
buffers are used to write level 1 elements and that now no seeks are
used in the seekable case any more, the two modes can be combined; as a
consequence, the non-seekable mode automatically inherits the ability to
write CRC-32 elements.

There are no differences in case the output is seekable; when it is not
and writing CRC-32 elements is disabled, there can still be minor
differences because before this commit, the EBML ID and length field
were counted towards the cluster size limit; now they no longer are.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2019-04-20 01:41:06 +02:00 committed by James Almer
parent e04a24e701
commit add68dcca9
4 changed files with 6 additions and 16 deletions
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14
libavformat/matroskaenc.c
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@ -336,20 +336,15 @@ static void end_ebml_master(AVIOContext *pb, ebml_master master)
static int start_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp, MatroskaMuxContext *mkv,
ebml_master *master, uint32_t elementid, uint64_t expectedsize)
{
int ret;
int ret, bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
if ((ret = avio_open_dyn_buf(dyn_cp)) < 0)
return ret;
if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
put_ebml_id(pb, elementid);
*master = (ebml_master) { avio_tell(pb), bytes };
if (mkv->write_crc)
put_ebml_void(*dyn_cp, 6); /* Reserve space for CRC32 so position/size calculations using avio_tell() take it into account */
} else
*master = start_ebml_master(*dyn_cp, elementid, expectedsize);
return 0;
}
@ -360,7 +355,6 @@ static void end_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp, Matrosk
uint8_t *buf, crc[4];
int size, skip = 0;
if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
size = avio_close_dyn_buf(*dyn_cp, &buf);
put_ebml_num(pb, size, master.sizebytes);
if (mkv->write_crc) {
@ -369,11 +363,7 @@ static void end_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp, Matrosk
put_ebml_binary(pb, EBML_ID_CRC32, crc, sizeof(crc));
}
avio_write(pb, buf + skip, size - skip);
} else {
end_ebml_master(*dyn_cp, master);
size = avio_close_dyn_buf(*dyn_cp, &buf);
avio_write(pb, buf, size);
}
av_free(buf);
*dyn_cp = NULL;
}

2
tests/fate/matroska.mak
View File

@ -4,7 +4,7 @@
FATE_MATROSKA-$(call DEMMUX, MATROSKA, MATROSKA) += fate-matroska-remux
fate-matroska-remux: CMD = md5pipe -i $(TARGET_SAMPLES)/vp9-test-vectors/vp90-2-2pass-akiyo.webm -color_trc 4 -c:v copy -fflags +bitexact -strict -2 -f matroska
fate-matroska-remux: CMP = oneline
fate-matroska-remux: REF = 768af2b49132a0de5e0502926ab9ca4f
fate-matroska-remux: REF = 82a5beaf7a0fb5bb2970d9bba9028086
FATE_MATROSKA_FFPROBE-$(call ALLYES, MATROSKA_DEMUXER) += fate-matroska-spherical-mono
fate-matroska-spherical-mono: CMD = run ffprobe$(PROGSSUF)$(EXESUF) -show_entries stream_side_data_list -select_streams v -v 0 $(TARGET_SAMPLES)/mkv/spherical.mkv

4
tests/fate/wavpack.mak
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@ -91,12 +91,12 @@ fate-wavpack-matroskamode: CMD = md5 -i $(TARGET_SAMPLES)/wavpack/special/matros
FATE_WAVPACK-$(call DEMMUX, WV, MATROSKA) += fate-wavpack-matroska_mux-mono
fate-wavpack-matroska_mux-mono: CMD = md5pipe -i $(TARGET_SAMPLES)/wavpack/num_channels/mono_16bit_int.wv -c copy -fflags +bitexact -f matroska
fate-wavpack-matroska_mux-mono: CMP = oneline
fate-wavpack-matroska_mux-mono: REF = 646c726a80857b74a55ba16a6d83aeed
fate-wavpack-matroska_mux-mono: REF = 942af4e88c4045e822508400545c47fd
FATE_WAVPACK-$(call DEMMUX, WV, MATROSKA) += fate-wavpack-matroska_mux-61
fate-wavpack-matroska_mux-61: CMD = md5pipe -i $(TARGET_SAMPLES)/wavpack/num_channels/eva_2.22_6.1_16bit-partial.wv -c copy -fflags +bitexact -f matroska
fate-wavpack-matroska_mux-61: CMP = oneline
fate-wavpack-matroska_mux-61: REF = 35b033bc75a0e18bbaabbaef38914837
fate-wavpack-matroska_mux-61: REF = c874587c6172feb74df52230197396de
FATE_SAMPLES_AVCONV += $(FATE_WAVPACK-yes)
fate-wavpack: $(FATE_WAVPACK-yes)

2
tests/ref/fate/binsub-mksenc
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@ -1 +1 @@
5d6f6f595b38d33424c186484f1c39ee
1d0977e91873b77b4c78b61f4f3cdec5