#define MV0K_TAG MKTAG('M', 'V', '0', 'K')
#define MV0F_TAG MKTAG('M', 'V', '0', 'F')
-#define EA_SAMPLE_RATE 22050
-#define EA_BITS_PER_SAMPLE 16
-#define EA_PREAMBLE_SIZE 8
-
typedef struct EaDemuxContext {
int big_endian;
int64_t audio_pts;
+ int bytes;
+ int sample_rate;
int num_channels;
int num_samples;
} EaDemuxContext;
int inHeader = 1;
EaDemuxContext *ea = s->priv_data;
ByteIOContext *pb = &s->pb;
- int compression_type = -1;
+ int compression_type = -1, revision = -1;
+ ea->bytes = 2;
+ ea->sample_rate = -1;
ea->num_channels = 1;
while (inHeader) {
subbyte = get_byte(pb);
switch (subbyte) {
+ case 0x80:
+ revision = read_arbitary(pb);
+ av_log (s, AV_LOG_INFO, "revision (element 0x80) set to 0x%08x\n", revision);
+ break;
case 0x82:
ea->num_channels = read_arbitary(pb);
av_log (s, AV_LOG_INFO, "num_channels (element 0x82) set to 0x%08x\n", ea->num_channels);
compression_type = read_arbitary(pb);
av_log (s, AV_LOG_INFO, "compression_type (element 0x83) set to 0x%08x\n", compression_type);
break;
+ case 0x84:
+ ea->sample_rate = read_arbitary(pb);
+ av_log (s, AV_LOG_INFO, "sample_rate (element 0x84) set to %i\n", ea->sample_rate);
+ break;
case 0x85:
ea->num_samples = read_arbitary(pb);
av_log (s, AV_LOG_INFO, "num_samples (element 0x85) set to 0x%08x\n", ea->num_samples);
}
switch (compression_type) {
+ case 0: ea->audio_codec = CODEC_ID_PCM_S16LE; break;
case 7: ea->audio_codec = CODEC_ID_ADPCM_EA; break;
default:
av_log(s, AV_LOG_ERROR, "unsupported stream type; compression_type=%i\n", compression_type);
return 0;
}
+ if (ea->sample_rate == -1)
+ ea->sample_rate = revision==3 ? 48000 : 22050;
+
return 1;
}
st = av_new_stream(s, 0);
if (!st)
return AVERROR(ENOMEM);
- av_set_pts_info(st, 33, 1, EA_SAMPLE_RATE);
+ av_set_pts_info(st, 33, 1, ea->sample_rate);
st->codec->codec_type = CODEC_TYPE_AUDIO;
st->codec->codec_id = ea->audio_codec;
st->codec->codec_tag = 0; /* no tag */
st->codec->channels = ea->num_channels;
- st->codec->sample_rate = EA_SAMPLE_RATE;
- st->codec->bits_per_sample = EA_BITS_PER_SAMPLE;
+ st->codec->sample_rate = ea->sample_rate;
+ st->codec->bits_per_sample = ea->bytes * 8;
st->codec->bit_rate = st->codec->channels * st->codec->sample_rate *
st->codec->bits_per_sample / 4;
st->codec->block_align = st->codec->channels * st->codec->bits_per_sample;
ByteIOContext *pb = &s->pb;
int ret = 0;
int packet_read = 0;
- unsigned char preamble[EA_PREAMBLE_SIZE];
unsigned int chunk_type, chunk_size;
int key = 0;
while (!packet_read) {
-
- if (get_buffer(pb, preamble, EA_PREAMBLE_SIZE) != EA_PREAMBLE_SIZE)
- return AVERROR(EIO);
- chunk_type = AV_RL32(&preamble[0]);
- chunk_size = AV_RL32(&preamble[4]) - EA_PREAMBLE_SIZE;
+ chunk_type = get_le32(pb);
+ chunk_size = (ea->big_endian ? get_be32(pb) : get_le32(pb)) - 8;
switch (chunk_type) {
/* audio data */
pkt->stream_index = ea->audio_stream_index;
pkt->pts = 90000;
pkt->pts *= ea->audio_frame_counter;
- pkt->pts /= EA_SAMPLE_RATE;
+ pkt->pts /= ea->sample_rate;
/* 2 samples/byte, 1 or 2 samples per frame depending
* on stereo; chunk also has 12-byte header */