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| author | Carl Eugen Hoyos <cehoyos@ag.or.at> | 2016-04-09 11:38:46 +0200 |
|---|---|---|
| committer | Carl Eugen Hoyos <cehoyos@ag.or.at> | 2016-04-09 11:38:46 +0200 |
| commit | 56cb465b38ab29afedd502c1e2ad66e6dce16b93 (patch) | |
| tree | 6a14a29a9d4b107b5e02c80ea6f40c8fc70143e0 /libavformat/gsmdec.c | |
| parent | d433623fba2b273491ff7dda401648e7d07e19fe (diff) | |
| download | ffmpeg-56cb465b38ab29afedd502c1e2ad66e6dce16b93.tar.gz | |
lavf/gsmdec: Add raw gsm autodetection.
Fixes bug 555.
Diffstat (limited to 'libavformat/gsmdec.c')
| -rw-r--r-- | libavformat/gsmdec.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/libavformat/gsmdec.c b/libavformat/gsmdec.c index 97dd8c589b..267ad6fe87 100644 --- a/libavformat/gsmdec.c +++ b/libavformat/gsmdec.c @@ -34,6 +34,23 @@ typedef struct GSMDemuxerContext { int sample_rate; } GSMDemuxerContext; +static int gsm_probe(AVProbeData *p) +{ + int valid = 0, invalid = 0; + uint8_t *b = p->buf; + while (b < p->buf + p->buf_size - 32) { + if ((*b & 0xf0) == 0xd0) { + valid++; + } else { + invalid++; + } + b += 33; + } + if (valid >> 5 > invalid) + return AVPROBE_SCORE_EXTENSION + 1; + return 0; +} + static int gsm_read_packet(AVFormatContext *s, AVPacket *pkt) { int ret, size; @@ -91,6 +108,7 @@ AVInputFormat ff_gsm_demuxer = { .name = "gsm", .long_name = NULL_IF_CONFIG_SMALL("raw GSM"), .priv_data_size = sizeof(GSMDemuxerContext), + .read_probe = gsm_probe, .read_header = gsm_read_header, .read_packet = gsm_read_packet, .flags = AVFMT_GENERIC_INDEX, |