Cvirtual_binary Caud_file::decode()
{
Cvirtual_binary d;
int cb_audio = get_cb_sample() * get_c_samples();
switch (header().compression)
{
case 1:
{
byte* w = d.write_start(cb_audio);
for (int chunk_i = 0; w != d.data_end(); chunk_i++)
{
const t_aud_chunk_header& header = *get_chunk_header(chunk_i);
aud_decode_ws_chunk(get_chunk_data(chunk_i), reinterpret_cast<char*>(w), header.size_in, header.size_out);
w += header.size_out;
}
}
break;
case 0x63:
{
aud_decode decode;
decode.init();
byte* w = d.write_start(cb_audio);
for (int chunk_i = 0; w != d.data_end(); chunk_i++)
{
const t_aud_chunk_header* header = get_chunk_header(chunk_i);
if (!header)
break;
decode.decode_chunk(get_chunk_data(chunk_i), reinterpret_cast<short*>(w), header->size_out / get_cb_sample());
w += header->size_out;
}
}
break;
}
return d;
}
static int handle_chunk_type(MMSHContext *mmsh)
{
MMSContext *mms = &mmsh->mms;
int res, len = 0;
ChunkType chunk_type;
chunk_type = get_chunk_header(mmsh, &len);
switch (chunk_type) {
case CHUNK_TYPE_END:
mmsh->chunk_seq = 0;
av_log(NULL, AV_LOG_ERROR, "Stream ended!\n");
return AVERROR(EIO);
case CHUNK_TYPE_STREAM_CHANGE:
mms->header_parsed = 0;
if (res = get_http_header_data(mmsh)) {
av_log(NULL, AV_LOG_ERROR,"Stream changed! Failed to get new header!\n");
return res;
}
break;
case CHUNK_TYPE_DATA:
return read_data_packet(mmsh, len);
default:
av_log(NULL, AV_LOG_ERROR, "Recv other type packet %d\n", chunk_type);
return AVERROR_INVALIDDATA;
}
return 0;
}
static int get_http_header_data(MMSHContext *mmsh)
{
MMSContext *mms = &mmsh->mms;
int res, len;
ChunkType chunk_type;
for (;;) {
len = 0;
res = chunk_type = get_chunk_header(mmsh, &len);
if (res < 0) {
return res;
} else if (chunk_type == CHUNK_TYPE_ASF_HEADER){
// get asf header and stored it
if (!mms->header_parsed) {
if (mms->asf_header) {
if (len != mms->asf_header_size) {
mms->asf_header_size = len;
av_dlog(NULL, "Header len changed from %d to %d\n",
mms->asf_header_size, len);
av_freep(&mms->asf_header);
}
}
mms->asf_header = av_mallocz(len);
if (!mms->asf_header) {
return AVERROR(ENOMEM);
}
mms->asf_header_size = len;
}
if (len > mms->asf_header_size) {
av_log(NULL, AV_LOG_ERROR,
"Asf header packet len = %d exceed the asf header buf size %d\n",
len, mms->asf_header_size);
return AVERROR(EIO);
}
res = url_read_complete(mms->mms_hd, mms->asf_header, len);
if (res != len) {
av_log(NULL, AV_LOG_ERROR,
"Recv asf header data len %d != expected len %d\n", res, len);
return AVERROR(EIO);
}
mms->asf_header_size = len;
if (!mms->header_parsed) {
res = ff_mms_asf_header_parser(mms);
mms->header_parsed = 1;
return res;
}
} else if (chunk_type == CHUNK_TYPE_DATA) {
// read data packet and do padding
return read_data_packet(mmsh, len);
} else {
if (len) {
if (len > sizeof(mms->in_buffer)) {
av_log(NULL, AV_LOG_ERROR,
"Other packet len = %d exceed the in_buffer size %zu\n",
len, sizeof(mms->in_buffer));
return AVERROR(EIO);
}
res = url_read_complete(mms->mms_hd, mms->in_buffer, len);
if (res != len) {
av_log(NULL, AV_LOG_ERROR, "Read other chunk type data failed!\n");
return AVERROR(EIO);
} else {
av_dlog(NULL, "Skip chunk type %d \n", chunk_type);
continue;
}
}
}
}
return 0;
}
const byte* Caud_file::get_chunk_data(int i)
{
return reinterpret_cast<const byte*>(get_chunk_header(i)) + sizeof(t_aud_chunk_header);
}
