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avformat/argo_asf: check sample count in demuxer

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Signed-off-by: Zane van Iperen <zane@zanevaniperen.com>
This commit is contained in:
Zane van Iperen 2020-08-02 22:22:42 +10:00
parent be090da25f
commit b0b87f28c3
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GPG Key ID: 68616B2D8AC4DCC5
1 changed files with 8 additions and 1 deletions
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9
libavformat/argo_asf.c
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@ -27,6 +27,7 @@
#define ASF_TAG MKTAG('A', 'S', 'F', '\0')
#define ASF_FILE_HEADER_SIZE 24
#define ASF_CHUNK_HEADER_SIZE 20
#define ASF_SAMPLE_COUNT 32
typedef struct ArgoASFFileHeader {
uint32_t magic; /*< Magic Number, {'A', 'S', 'F', '\0'} */
@ -39,7 +40,7 @@ typedef struct ArgoASFFileHeader {
typedef struct ArgoASFChunkHeader {
uint32_t num_blocks; /*< No. blocks in the chunk. */
uint32_t num_samples; /*< No. samples per channel in a block. */
uint32_t num_samples; /*< No. samples per channel in a block. Always 32. */
uint32_t unk1; /*< Unknown */
uint16_t sample_rate; /*< Sample rate. */
uint16_t unk2; /*< Unknown. */
@ -158,6 +159,12 @@ static int argo_asf_read_header(AVFormatContext *s)
argo_asf_parse_chunk_header(&asf->ckhdr, buf);
if (asf->ckhdr.num_samples != ASF_SAMPLE_COUNT) {
av_log(s, AV_LOG_ERROR, "Invalid sample count. Got %u, expected %d\n",
asf->ckhdr.num_samples, ASF_SAMPLE_COUNT);
return AVERROR_INVALIDDATA;
}
if ((asf->ckhdr.flags & ASF_CF_ALWAYS1) != ASF_CF_ALWAYS1 || (asf->ckhdr.flags & ASF_CF_ALWAYS0) != 0) {
avpriv_request_sample(s, "Nonstandard flags (0x%08X)", asf->ckhdr.flags);
return AVERROR_PATCHWELCOME;