/*----------------------------------------------------------------------
| CrossFader_PromotePacket
+---------------------------------------------------------------------*/
static BLT_Result
CrossFader_PromotePacket(CrossFader* fader, BLT_Size size)
{
BLT_MediaPacket* packet;
unsigned char* payload;
BLT_Result result;
ATX_LOG_FINER_1("CrossFader::PromotePacket - size = %d", size);
/* create a packet */
result = BLT_Core_CreateMediaPacket(&fader->base.core,
size,
(const BLT_MediaType*)&fader->input.media_type,
&packet);
if (BLT_FAILED(result)) return result;
/* get the addr of the buffer */
payload = BLT_MediaPacket_GetPayloadBuffer(packet);
/* read the data from the input ring buffer */
result = ATX_RingBuffer_Read(fader->input.buffer, payload, size);
if (BLT_FAILED(result)) {
BLT_MediaPacket_Release(packet);
return result;
}
/* update the size of the packet */
BLT_MediaPacket_SetPayloadSize(packet, size);
/* make the packet ready for the output */
ATX_List_AddData(fader->output.packets, packet);
return BLT_SUCCESS;
}
/*----------------------------------------------------------------------
| SilenceRemover_AcceptPacket
+---------------------------------------------------------------------*/
static void
SilenceRemover_AcceptPacket(SilenceRemover* self, BLT_MediaPacket* packet)
{
BLT_Result result;
ATX_LOG_FINER("SilenceRemover: accepting packet");
/* first, use any pending packet */
SilenceRemover_AcceptPending(self);
/* add the packet to the output list */
result = ATX_List_AddData(self->output.packets, packet);
if (ATX_SUCCEEDED(result)) {
BLT_MediaPacket_AddReference(packet);
}
}
/*----------------------------------------------------------------------
| SilenceRemover_AcceptPending
+---------------------------------------------------------------------*/
static void
SilenceRemover_AcceptPending(SilenceRemover* self)
{
BLT_MediaPacket* packet = self->input.pending;
BLT_Result result;
if (packet != NULL) {
result = ATX_List_AddData(self->output.packets, packet);
if (ATX_FAILED(result)) {
BLT_MediaPacket_Release(packet);
}
self->input.pending = NULL;
ATX_LOG_FINER("SilenceRemover: accepting pending packet");
} else {
ATX_LOG_FINER("SilenceRemover: no pending packet");
}
}
/*----------------------------------------------------------------------
| ATX_HttpMessage_SetHeader
+---------------------------------------------------------------------*/
ATX_Result
ATX_HttpMessage_SetHeader(ATX_HttpMessage* message,
ATX_CString name,
ATX_CString value)
{
ATX_HttpHeader* header;
ATX_Result result;
/* find if the header already exists */
ATX_ListItem* item = ATX_List_GetFirstItem(message->headers);
while (item) {
header = (ATX_HttpHeader*)ATX_ListItem_GetData(item);
if (ATX_String_Equals(&header->name, name, ATX_TRUE)) {
/* found a match */
return ATX_HttpHeader_SetValue(header, value);
}
item = ATX_ListItem_GetNext(item);
}
/* create a new header */
result = ATX_HttpHeader_Create(name, value, &header);
if (ATX_FAILED(result)) return result;
return ATX_List_AddData(message->headers, header);
}
/*----------------------------------------------------------------------
| OsxAudioUnitsOutput_QueuePacket
+---------------------------------------------------------------------*/
static BLT_Result
OsxAudioUnitsOutput_QueuePacket(OsxAudioUnitsOutput* self, BLT_MediaPacket* packet)
{
BLT_Result result = BLT_SUCCESS;
unsigned int watchdog = BLT_OSX_AUDIO_UNITS_OUTPUT_MAX_QUEUE_WAIT_COUNT;
ATX_LOG_FINER("queuing packet");
/* lock the queue */
pthread_mutex_lock(&self->lock);
/* wait for some space in the queue */
while (ATX_List_GetItemCount(self->packet_queue) >= self->max_packets_in_queue) {
pthread_mutex_unlock(&self->lock);
usleep(BLT_OSX_AUDIO_UNITS_OUTPUT_SLEEP_INTERVAL);
pthread_mutex_lock(&self->lock);
if (--watchdog == 0) {
ATX_LOG_WARNING("*** the watchdog bit us ***");
goto end;
}
}
/* add the packet to the queue */
ATX_List_AddData(self->packet_queue, packet);
ATX_LOG_FINER_1("packet queued, %d in queue", ATX_List_GetItemCount(self->packet_queue));
/* keep a reference to the packet */
BLT_MediaPacket_AddReference(packet);
end:
/* unlock the queue */
pthread_mutex_unlock(&self->lock);
return result;
}
/*----------------------------------------------------------------------
| AacDecoderInput_PutPacket
+---------------------------------------------------------------------*/
BLT_METHOD
AacDecoderInput_PutPacket(BLT_PacketConsumer* _self,
BLT_MediaPacket* packet)
{
AacDecoder* self = ATX_SELF_M(input, AacDecoder, BLT_PacketConsumer);
ATX_Result result;
/* check to see if this is the end of a stream */
if (BLT_MediaPacket_GetFlags(packet) &
BLT_MEDIA_PACKET_FLAG_END_OF_STREAM) {
self->input.eos = BLT_TRUE;
}
/* check to see if we need to create a decoder for this */
if (self->helix_decoder == NULL) {
AacDecoderConfig decoder_config;
AACFrameInfo aac_frame_info;
const BLT_MediaType* media_type;
const BLT_Mp4AudioMediaType* mp4_media_type;
BLT_MediaPacket_GetMediaType(packet, &media_type);
if (media_type == NULL || media_type->id != self->mp4es_type_id) {
return BLT_ERROR_INVALID_MEDIA_TYPE;
}
mp4_media_type = (const BLT_Mp4AudioMediaType*)media_type;
if (mp4_media_type->base.stream_type != BLT_MP4_STREAM_TYPE_AUDIO) {
return BLT_ERROR_INVALID_MEDIA_TYPE;
}
if (BLT_FAILED(AacDecoderConfig_Parse(mp4_media_type->decoder_info, mp4_media_type->decoder_info_length, &decoder_config))) {
return BLT_ERROR_INVALID_MEDIA_FORMAT;
}
if (decoder_config.object_type != BLT_AAC_OBJECT_TYPE_AAC_LC &&
decoder_config.object_type != BLT_AAC_OBJECT_TYPE_SBR) {
return BLT_ERROR_UNSUPPORTED_CODEC;
}
/* create the decoder */
self->helix_decoder = AACInitDecoder();
if (self->helix_decoder == NULL) return BLT_ERROR_OUT_OF_MEMORY;
/* configure the decoder */
ATX_SetMemory(&aac_frame_info, 0, sizeof(aac_frame_info));
aac_frame_info.nChans = AacDecoderConfig_GetChannelCount(&decoder_config);
aac_frame_info.sampRateCore = AacDecoderConfig_GetSampleRate(&decoder_config);
if (decoder_config.object_type == BLT_AAC_OBJECT_TYPE_AAC_LC) {
aac_frame_info.profile = AAC_PROFILE_LC;
}
self->sample_buffer_size = BLT_AAC_FRAME_SIZE*2*aac_frame_info.nChans*2; /* the last *2 is for SBR support */
AACSetRawBlockParams(self->helix_decoder, 0, &aac_frame_info);
}
{
unsigned char* in_buffer;
int in_size;
short* out_buffer;
BLT_MediaPacket* out_packet;
AACFrameInfo aac_frame_info;
/* create a PCM packet for the output */
result = BLT_Core_CreateMediaPacket(ATX_BASE(self, BLT_BaseMediaNode).core,
self->sample_buffer_size,
(BLT_MediaType*)&self->output.media_type,
&out_packet);
if (BLT_FAILED(result)) return result;
/* copy the timestamp */
BLT_MediaPacket_SetTimeStamp(out_packet, BLT_MediaPacket_GetTimeStamp(packet));
/* decode the packet as a frame */
in_buffer = BLT_MediaPacket_GetPayloadBuffer(packet);
in_size = BLT_MediaPacket_GetPayloadSize(packet);
out_buffer = (short*)BLT_MediaPacket_GetPayloadBuffer(out_packet);
result = AACDecode(self->helix_decoder, &in_buffer, &in_size, out_buffer);
if (result != 0) {
BLT_MediaPacket_Release(out_packet);
return BLT_ERROR_INVALID_MEDIA_FORMAT;
}
/* check that the sample buffer matches our current media type */
AACGetLastFrameInfo(self->helix_decoder, &aac_frame_info);
if (self->output.media_type.channel_count == 0) {
/* first time, setup our media type */
self->output.media_type.channel_count = aac_frame_info.nChans;
self->output.media_type.sample_rate = aac_frame_info.sampRateOut;
self->output.media_type.bits_per_sample = 16;
self->output.media_type.sample_format = BLT_PCM_SAMPLE_FORMAT_SIGNED_INT_NE;
self->output.media_type.channel_mask = 0;
/* update the stream info */
if (ATX_BASE(self, BLT_BaseMediaNode).context) {
BLT_StreamInfo stream_info;
stream_info.data_type = "MPEG-4 AAC";
stream_info.sample_rate = aac_frame_info.sampRateOut;
stream_info.channel_count = aac_frame_info.nChans;
stream_info.mask = BLT_STREAM_INFO_MASK_DATA_TYPE |
BLT_STREAM_INFO_MASK_SAMPLE_RATE |
BLT_STREAM_INFO_MASK_CHANNEL_COUNT;
BLT_Stream_SetInfo(ATX_BASE(self, BLT_BaseMediaNode).context, &stream_info);
}
/* update the packet media type */
BLT_MediaPacket_SetMediaType(out_packet, (BLT_MediaType*)&self->output.media_type);
} else {
/* we've already setup a media type, check that this is the same */
if (self->output.media_type.sample_rate != (unsigned int)aac_frame_info.sampRateOut ||
self->output.media_type.channel_count != aac_frame_info.nChans) {
BLT_MediaPacket_Release(out_packet);
return BLT_ERROR_INVALID_MEDIA_FORMAT;
}
}
/* add to the output packet list */
BLT_MediaPacket_SetPayloadSize(out_packet, aac_frame_info.outputSamps*2);
ATX_List_AddData(self->output.packets, out_packet);
}
return BLT_SUCCESS;
}