asf->packet_size = asf->hdr.max_pktsize;
asf->nb_packets = asf->hdr.packets_count;
} else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
- int type, total_size;
+ int type, total_size, type_specific_size;
unsigned int tag1;
int64_t pos1, pos2;
}
get_guid(pb, &g);
total_size = get_le64(pb);
- get_le32(pb);
+ type_specific_size = get_le32(pb);
get_le32(pb);
st->id = get_le16(pb) & 0x7f; /* stream id */
// mapping of asf ID to AV stream ID;
st->codec.codec_type = type;
st->codec.frame_rate = 15 * s->pts_den / s->pts_num; // 15 fps default
if (type == CODEC_TYPE_AUDIO) {
- get_wav_header(pb, &st->codec, 1);
+ get_wav_header(pb, &st->codec, type_specific_size);
/* We have to init the frame size at some point .... */
pos2 = url_ftell(pb);
if (gsize > (pos2 + 8 - pos1 + 24)) {
void put_bmp_header(ByteIOContext *pb, AVCodecContext *enc, const CodecTag *tags, int for_asf);
int put_wav_header(ByteIOContext *pb, AVCodecContext *enc);
int wav_codec_get_id(unsigned int tag, int bps);
-void get_wav_header(ByteIOContext *pb, AVCodecContext *codec,
- int has_extra_data);
+void get_wav_header(ByteIOContext *pb, AVCodecContext *codec, int size);
extern const CodecTag codec_bmp_tags[];
extern const CodecTag codec_wav_tags[];
return hdrsize;
}
-void get_wav_header(ByteIOContext *pb, AVCodecContext *codec,
- int has_extra_data)
+/* We could be given one of the three possible structures here:
+ * WAVEFORMAT, PCMWAVEFORMAT or WAVEFORMATEX. Each structure
+ * is an expansion of the previous one with the fields added
+ * at the bottom. PCMWAVEFORMAT adds 'WORD wBitsPerSample' and
+ * WAVEFORMATEX adds 'WORD cbSize' and basically makes itself
+ * an openended structure.
+ */
+void get_wav_header(ByteIOContext *pb, AVCodecContext *codec, int size)
{
int id;
id = get_le16(pb);
+ codec->codec_id = wav_codec_get_id(id, codec->frame_bits);
codec->codec_type = CODEC_TYPE_AUDIO;
codec->codec_tag = id;
codec->channels = get_le16(pb);
codec->sample_rate = get_le32(pb);
codec->bit_rate = get_le32(pb) * 8;
codec->block_align = get_le16(pb);
- codec->bits_per_sample = get_le16(pb); /* bits per sample */
- codec->codec_id = wav_codec_get_id(id, codec->frame_bits);
- if (has_extra_data) {
+ if (size == 14) { /* We're dealing with plain vanilla WAVEFORMAT */
+ codec->bits_per_sample = 8;
+ return;
+ }
+
+ codec->bits_per_sample = get_le16(pb);
+ if (size > 16) { /* We're obviously dealing with WAVEFORMATEX */
codec->extradata_size = get_le16(pb);
if (codec->extradata_size > 0) {
+ if (codec->extradata_size > size - 18)
+ codec->extradata_size = size - 18;
codec->extradata = av_mallocz(codec->extradata_size);
get_buffer(pb, codec->extradata, codec->extradata_size);
- }
+ } else
+ codec->extradata_size = 0;
+
+ /* It is possible for the chunk to contain garbage at the end */
+ if (size - codec->extradata_size - 18 > 0)
+ url_fskip(pb, size - codec->extradata_size - 18);
}
}
if (!st)
return AVERROR_NOMEM;
- get_wav_header(pb, &st->codec, (size >= 18));
+ get_wav_header(pb, &st->codec, size);
size = find_tag(pb, MKTAG('d', 'a', 't', 'a'));
if (size < 0)