diff options
| author | Laurent Aimar <fenrir@videolan.org> | 2011-09-12 21:09:57 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2011-11-03 03:52:55 +0100 |
| commit | 71132596ae098bd5d7937efc9090038d25f326e8 (patch) | |
| tree | efec2504593ad946c48f95e0fcb30161d033359b | |
| parent | d6f8b65417f2170829a774ce07df7fdd34b32367 (diff) | |
| download | ffmpeg-71132596ae098bd5d7937efc9090038d25f326e8.tar.gz | |
segafilm: Fix potential division by 0 on corrupted segafilm streams in the demuxer.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
| -rw-r--r-- | libavformat/segafilm.c | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/libavformat/segafilm.c b/libavformat/segafilm.c index b802b33461..c1da78998d 100644 --- a/libavformat/segafilm.c +++ b/libavformat/segafilm.c @@ -111,11 +111,16 @@ static int film_read_header(AVFormatContext *s, film->audio_samplerate = AV_RB16(&scratch[24]); film->audio_channels = scratch[21]; film->audio_bits = scratch[22]; - if (film->audio_bits == 8) - film->audio_type = CODEC_ID_PCM_S8; - else if (film->audio_bits == 16) - film->audio_type = CODEC_ID_PCM_S16BE; - else + if (scratch[23] == 2) + film->audio_type = CODEC_ID_ADPCM_ADX; + else if (film->audio_channels > 0) { + if (film->audio_bits == 8) + film->audio_type = CODEC_ID_PCM_S8; + else if (film->audio_bits == 16) + film->audio_type = CODEC_ID_PCM_S16BE; + else + film->audio_type = CODEC_ID_NONE; + } else film->audio_type = CODEC_ID_NONE; } @@ -189,8 +194,12 @@ static int film_read_header(AVFormatContext *s, film->sample_table[i].pts *= film->base_clock; film->sample_table[i].pts /= film->audio_samplerate; - audio_frame_counter += (film->sample_table[i].sample_size / - (film->audio_channels * film->audio_bits / 8)); + if (film->audio_type == CODEC_ID_ADPCM_ADX) + audio_frame_counter += (film->sample_table[i].sample_size * 32 / + (18 * film->audio_channels)); + else if (film->audio_type != CODEC_ID_NONE) + audio_frame_counter += (film->sample_table[i].sample_size / + (film->audio_channels * film->audio_bits / 8)); } else { film->sample_table[i].stream = film->video_stream_index; film->sample_table[i].pts = AV_RB32(&scratch[8]) & 0x7FFFFFFF; |