static M4Err AAC_Get_MPEG4_IOD(NetClientPlugin *plug, u32 expect_type, const char *sub_url, char **raw_iod, u32 *raw_iod_size)
{
ESDescriptor *esd;
M4Err e;
AACReader *read = plug->priv;
ObjectDescriptor *od = (ObjectDescriptor *) OD_NewDescriptor(ObjectDescriptor_Tag);
/*since we don't handle multitrack in aac, we don't need to check sub_url, only use expected type*/
od->objectDescriptorID = 1;
/*audio object*/
if (expect_type==NM_OD_AUDIO) {
esd = AAC_GetESD(read);
esd->OCRESID = 0;
ChainAddEntry(od->ESDescriptors, esd);
e = OD_EncDesc((Descriptor *) od, raw_iod, raw_iod_size);
OD_DeleteDescriptor((Descriptor **)&od);
return e;
}
/*inline scene*/
/*OD ESD*/
esd = OD_NewESDescriptor(0);
esd->slConfig->timestampResolution = 1000;
esd->decoderConfig->streamType = M4ST_OD;
esd->decoderConfig->objectTypeIndication = GPAC_STATIC_OD_OTI;
esd->ESID = 1;
ChainAddEntry(od->ESDescriptors, esd);
e = OD_EncDesc((Descriptor *) od, raw_iod, raw_iod_size);
OD_DeleteDescriptor((Descriptor **)&od);
return e;
}
static void AAC_SetupObject(AACReader *read)
{
GF_ESD *esd;
GF_ObjectDescriptor *od = (GF_ObjectDescriptor *) gf_odf_desc_new(GF_ODF_OD_TAG);
od->objectDescriptorID = 1;
esd = AAC_GetESD(read);
esd->OCRESID = 0;
gf_list_add(od->ESDescriptors, esd);
gf_term_add_media(read->service, (GF_Descriptor*)od, 0);
}
static GF_Descriptor *AAC_GetServiceDesc(GF_InputService *plug, u32 expect_type, const char *sub_url)
{
AACReader *read = plug->priv;
/*since we don't handle multitrack in aac, we don't need to check sub_url, only use expected type*/
/*audio object*/
if (expect_type==GF_MEDIA_OBJECT_AUDIO) {
GF_ESD *esd;
GF_ObjectDescriptor *od = (GF_ObjectDescriptor *) gf_odf_desc_new(GF_ODF_OD_TAG);
od->objectDescriptorID = 1;
esd = AAC_GetESD(read);
esd->OCRESID = 0;
gf_list_add(od->ESDescriptors, esd);
return (GF_Descriptor *) od;
}
read->is_inline = 1;
/*inline scene: no specific service*/
return NULL;
}
static M4Err AAC_ChannelGetSLP(NetClientPlugin *plug, LPNETCHANNEL channel, char **out_data_ptr, u32 *out_data_size, struct tagSLHeader *out_sl_hdr, Bool *sl_compressed, M4Err *out_reception_status, Bool *is_new_data)
{
u32 pos, start_from;
Bool sync;
BitStream *bs;
ADTSHeader hdr;
AACReader *read = plug->priv;
*out_reception_status = M4OK;
*sl_compressed = 0;
*is_new_data = 0;
memset(&read->sl_hdr, 0, sizeof(SLHeader));
read->sl_hdr.randomAccessPointFlag = 1;
read->sl_hdr.compositionTimeStampFlag = 1;
if (read->od_ch == channel) {
LPODCODEC codec;
ObjectDescriptor *od;
ObjectDescriptorUpdate *odU;
ESDescriptor *esd;
if (read->od_done) {
*out_reception_status = M4EOF;
return M4OK;
}
read->sl_hdr.compositionTimeStamp = (u64) (read->start_range * 1000);
*out_sl_hdr = read->sl_hdr;
if (!read->od_data) {
*is_new_data = 1;
odU = (ObjectDescriptorUpdate *) OD_NewCommand(ODUpdate_Tag);
od = (ObjectDescriptor *) OD_NewDescriptor(ObjectDescriptor_Tag);
od->objectDescriptorID = ISMA_AUDIO_OD_ID;
esd = AAC_GetESD(read);
/*we signal start/end of units in live mode*/
ChainAddEntry(od->ESDescriptors, esd);
ChainAddEntry(odU->objectDescriptors, od);
codec = OD_NewCodec(OD_WRITE);
OD_AddCommand(codec, (ODCommand *)odU);
OD_EncodeAU(codec);
OD_GetEncodedAU(codec, &read->od_data, &read->od_data_size);
OD_DeleteCodec(codec);
}
*out_data_ptr = read->od_data;
*out_data_size = read->od_data_size;
return M4OK;
}
if (read->es_ch != channel) return M4ChannelNotFound;
/*fetching es data*/
if (read->es_done) {
*out_reception_status = M4EOF;
return M4OK;
}
if (!read->es_data) {
if (!read->stream) {
*out_data_ptr = NULL;
*out_data_size = 0;
return M4OK;
}
bs = NewBitStreamFromFile(read->stream, BS_FILE_READ);
*is_new_data = 1;
fetch_next:
pos = ftell(read->stream);
sync = ADTS_SyncFrame(bs, !read->is_remote, &hdr);
if (!sync) {
DeleteBitStream(bs);
if (!read->dnload) {
*out_reception_status = M4EOF;
read->es_done = 1;
} else {
fseek(read->stream, pos, SEEK_SET);
*out_reception_status = M4OK;
}
return M4OK;
}
if (!hdr.frame_size) {
DeleteBitStream(bs);
*out_reception_status = M4EOF;
read->es_done = 1;
return M4OK;
}
read->es_data_size = hdr.frame_size;
read->nb_samp = 1024;
/*we're seeking*/
if (read->start_range && read->duration) {
start_from = (u32) (read->start_range * read->sample_rate);
if (read->current_time + read->nb_samp < start_from) {
read->current_time += read->nb_samp;
goto fetch_next;
} else {
read->start_range = 0;
}
}
read->sl_hdr.compositionTimeStamp = read->current_time;
read->es_data = malloc(sizeof(char) * (read->es_data_size+read->pad_bytes));
BS_ReadData(bs, read->es_data, read->es_data_size);
if (read->pad_bytes) memset(read->es_data + read->es_data_size, 0, sizeof(char) * read->pad_bytes);
DeleteBitStream(bs);
}
*out_sl_hdr = read->sl_hdr;
*out_data_ptr = read->es_data;
*out_data_size = read->es_data_size;
return M4OK;
}
