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avformat/movenc: Add more error checking when writing sample entries. 

Fixes a problem where a sample entry which cannot be written correctly appears to succeed, but produces an invalid file.
For example, this command:
ffmpeg -f lavfi -i sine=frequency=1000:duration=5 -codec:a ac3 -movflags +empty_moov -frag_duration 5000000 /tmp/foo.mp4
produced a file with the ac-3 sample entry, but no AC3SpecificBox (dac3) child, which is invalid according to ETSI TS 102 366.

Reviewed-by: Baptiste Coudurier <baptiste.coudurier@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Nikolas Bowe 2019-02-04 17:02:19 -08:00 committed by Michael Niedermayer
parent 1aa796bc9c
commit 2b8458fcc5
1 changed files with 47 additions and 26 deletions
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73
libavformat/movenc.c
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@ -320,8 +320,12 @@ static int mov_write_ac3_tag(AVIOContext *pb, MOVTrack *track)
uint8_t buf[3];
int fscod, bsid, bsmod, acmod, lfeon, frmsizecod;
if (track->vos_len < 7)
return -1;
if (track->vos_len < 7) {
av_log(pb, AV_LOG_ERROR,
"Cannot write moov atom before AC3 packets."
" Set the delay_moov flag to fix this.\n");
return AVERROR(EINVAL);
}
avio_wb32(pb, 11);
ffio_wfourcc(pb, "dac3");
@ -538,8 +542,11 @@ static int mov_write_eac3_tag(AVIOContext *pb, MOVTrack *track)
struct eac3_info *info;
int size, i;
if (!track->eac3_priv)
if (!track->eac3_priv) {
av_log(pb, AV_LOG_ERROR,
"Cannot write moov atom before EAC3 packets parsed.\n");
return AVERROR(EINVAL);
}
info = track->eac3_priv;
size = 2 + ((34 * (info->num_ind_sub + 1) + 7) >> 3);
@ -1022,6 +1029,7 @@ static int mov_write_audio_tag(AVFormatContext *s, AVIOContext *pb, MOVMuxContex
int64_t pos = avio_tell(pb);
int version = 0;
uint32_t tag = track->tag;
int ret = 0;
if (track->mode == MODE_MOV) {
if (track->timescale > UINT16_MAX || !track->par->channels) {
@ -1125,34 +1133,41 @@ static int mov_write_audio_tag(AVFormatContext *s, AVIOContext *pb, MOVMuxContex
track->par->codec_id == AV_CODEC_ID_QDM2 ||
(mov_pcm_le_gt16(track->par->codec_id) && version==1) ||
(mov_pcm_be_gt16(track->par->codec_id) && version==1)))
mov_write_wave_tag(s, pb, track);
ret = mov_write_wave_tag(s, pb, track);
else if (track->tag == MKTAG('m','p','4','a'))
mov_write_esds_tag(pb, track);
ret = mov_write_esds_tag(pb, track);
else if (track->par->codec_id == AV_CODEC_ID_AMR_NB)
mov_write_amr_tag(pb, track);
ret = mov_write_amr_tag(pb, track);
else if (track->par->codec_id == AV_CODEC_ID_AC3)
mov_write_ac3_tag(pb, track);
ret = mov_write_ac3_tag(pb, track);
else if (track->par->codec_id == AV_CODEC_ID_EAC3)
mov_write_eac3_tag(pb, track);
ret = mov_write_eac3_tag(pb, track);
else if (track->par->codec_id == AV_CODEC_ID_ALAC)
mov_write_extradata_tag(pb, track);
ret = mov_write_extradata_tag(pb, track);
else if (track->par->codec_id == AV_CODEC_ID_WMAPRO)
mov_write_wfex_tag(s, pb, track);
ret = mov_write_wfex_tag(s, pb, track);
else if (track->par->codec_id == AV_CODEC_ID_FLAC)
mov_write_dfla_tag(pb, track);
ret = mov_write_dfla_tag(pb, track);
else if (track->par->codec_id == AV_CODEC_ID_OPUS)
mov_write_dops_tag(pb, track);
ret = mov_write_dops_tag(pb, track);
else if (track->vos_len > 0)
mov_write_glbl_tag(pb, track);
ret = mov_write_glbl_tag(pb, track);
if (track->mode == MODE_MOV && track->par->codec_type == AVMEDIA_TYPE_AUDIO)
mov_write_chan_tag(s, pb, track);
if (ret < 0)
return ret;
if (mov->encryption_scheme != MOV_ENC_NONE) {
ff_mov_cenc_write_sinf_tag(track, pb, mov->encryption_kid);
if (track->mode == MODE_MOV && track->par->codec_type == AVMEDIA_TYPE_AUDIO
&& ((ret = mov_write_chan_tag(s, pb, track)) < 0)) {
return ret;
}
return update_size(pb, pos);
if (mov->encryption_scheme != MOV_ENC_NONE
&& ((ret = ff_mov_cenc_write_sinf_tag(track, pb, mov->encryption_kid)) < 0)) {
return ret;
}
ret = update_size(pb, pos);
return ret;
}
static int mov_write_d263_tag(AVIOContext *pb)
@ -2217,22 +2232,27 @@ static int mov_write_gpmd_tag(AVIOContext *pb, const MOVTrack *track)
static int mov_write_stsd_tag(AVFormatContext *s, AVIOContext *pb, MOVMuxContext *mov, MOVTrack *track)
{
int64_t pos = avio_tell(pb);
int ret = 0;
avio_wb32(pb, 0); /* size */
ffio_wfourcc(pb, "stsd");
avio_wb32(pb, 0); /* version & flags */
avio_wb32(pb, 1); /* entry count */
if (track->par->codec_type == AVMEDIA_TYPE_VIDEO)
mov_write_video_tag(pb, mov, track);
ret = mov_write_video_tag(pb, mov, track);
else if (track->par->codec_type == AVMEDIA_TYPE_AUDIO)
mov_write_audio_tag(s, pb, mov, track);
ret = mov_write_audio_tag(s, pb, mov, track);
else if (track->par->codec_type == AVMEDIA_TYPE_SUBTITLE)
mov_write_subtitle_tag(pb, track);
ret = mov_write_subtitle_tag(pb, track);
else if (track->par->codec_tag == MKTAG('r','t','p',' '))
mov_write_rtp_tag(pb, track);
ret = mov_write_rtp_tag(pb, track);
else if (track->par->codec_tag == MKTAG('t','m','c','d'))
mov_write_tmcd_tag(pb, track);
ret = mov_write_tmcd_tag(pb, track);
else if (track->par->codec_tag == MKTAG('g','p','m','d'))
mov_write_gpmd_tag(pb, track);
ret = mov_write_gpmd_tag(pb, track);
if (ret < 0)
return ret;
return update_size(pb, pos);
}
@ -2435,11 +2455,12 @@ static int mov_preroll_write_stbl_atoms(AVIOContext *pb, MOVTrack *track)
static int mov_write_stbl_tag(AVFormatContext *s, AVIOContext *pb, MOVMuxContext *mov, MOVTrack *track)
{
int64_t pos = avio_tell(pb);
int ret;
int ret = 0;
avio_wb32(pb, 0); /* size */
ffio_wfourcc(pb, "stbl");
mov_write_stsd_tag(s, pb, mov, track);
if ((ret = mov_write_stsd_tag(s, pb, mov, track)) < 0)
return ret;
mov_write_stts_tag(pb, track);
if ((track->par->codec_type == AVMEDIA_TYPE_VIDEO ||
track->par->codec_tag == MKTAG('r','t','p',' ')) &&