-int
-voc_get_packet(AVFormatContext *s, AVPacket *pkt, AVStream *st, int max_size)
-{
- voc_dec_context_t *voc = s->priv_data;
- AVCodecContext *dec = st->codec;
- ByteIOContext *pb = &s->pb;
- voc_type_t type;
- int size;
- int sample_rate = 0;
- int channels = 1;
-
- while (!voc->remaining_size) {
- type = get_byte(pb);
- if (type == VOC_TYPE_EOF)
- return AVERROR(EIO);
- voc->remaining_size = get_le24(pb);
- max_size -= 4;
-
- switch (type) {
- case VOC_TYPE_VOICE_DATA:
- dec->sample_rate = 1000000 / (256 - get_byte(pb));
- if (sample_rate)
- dec->sample_rate = sample_rate;
- dec->channels = channels;
- dec->codec_id = codec_get_id(voc_codec_tags, get_byte(pb));
- dec->bits_per_sample = av_get_bits_per_sample(dec->codec_id);
- voc->remaining_size -= 2;
- max_size -= 2;
- channels = 1;
- break;
-
- case VOC_TYPE_VOICE_DATA_CONT:
- break;
-
- case VOC_TYPE_EXTENDED:
- sample_rate = get_le16(pb);
- get_byte(pb);
- channels = get_byte(pb) + 1;
- sample_rate = 256000000 / (channels * (65536 - sample_rate));
- voc->remaining_size = 0;
- max_size -= 4;
- break;
-
- case VOC_TYPE_NEW_VOICE_DATA:
- dec->sample_rate = get_le32(pb);
- dec->bits_per_sample = get_byte(pb);
- dec->channels = get_byte(pb);
- dec->codec_id = codec_get_id(voc_codec_tags, get_le16(pb));
- url_fskip(pb, 4);
- voc->remaining_size -= 12;
- max_size -= 12;
- break;
-
- default:
- url_fskip(pb, voc->remaining_size);
- max_size -= voc->remaining_size;
- voc->remaining_size = 0;
- break;
- }
- }
-
- dec->bit_rate = dec->sample_rate * dec->bits_per_sample;
-
- if (max_size <= 0)
- max_size = 2048;
- size = FFMIN(voc->remaining_size, max_size);
- voc->remaining_size -= size;
- return av_get_packet(pb, pkt, size);
-}
-