/**
* Audio frame with a minimal header
*/
static int adbinary_audio_minimal(AVFormatContext *s,
AVPacket *pkt, int size,
struct NetVuAudioData *data)
{
AVIOContext *pb = s->pb;
int dataSize = size - (4 + 2 + 2);
int status;
// Get the minimal audio header and copy into generic audio data structure
memset(data, 0, sizeof(struct NetVuAudioData));
data->seconds = avio_rb32(pb);
data->msecs = avio_rb16(pb);
data->mode = avio_rb16(pb);
if ( pb->error || (data->seconds == 0) ) {
av_log(s, AV_LOG_ERROR, "%s: Reading header, errorcode %d\n",
__func__, pb->error);
return ADFFMPEG_AD_ERROR_MINIMAL_AUDIO_ADPCM_GET_BUFFER;
}
// Now get the main frame data into a new packet
status = av_get_packet(pb, pkt, dataSize);
if (status < 0) {
av_log(s, AV_LOG_ERROR, "%s: av_get_packet (size %d) failed, status %d\n",
__func__, data->sizeOfAudioData, status);
return ADFFMPEG_AD_ERROR_MINIMAL_AUDIO_ADPCM_NEW_PACKET;
}
audiodata_network2host(pkt->data, pkt->data, dataSize);
return status;
}
static int adaudio_read_packet(struct AVFormatContext *s, AVPacket *pkt)
{
AVIOContext * ioContext = s->pb;
int retVal = AVERROR(EIO);
int packetSize = 0;
int sampleSize = 0;
AVStream * st = NULL;
int isPacketAlloced = 0;
#ifdef AD_SIDEDATA_IN_PRIV
struct ADFrameData * frameData = NULL;
#endif
/* Get the next packet */
if( (packetSize = ioContext->read_packet( ioContext->opaque, ioContext->buf_ptr, ioContext->buffer_size )) > 0 ) {
/* Validate the 12 byte RTP header as best we can */
if( ioContext->buf_ptr[1] == RTP_PAYLOAD_TYPE_8000HZ_ADPCM ||
ioContext->buf_ptr[1] == RTP_PAYLOAD_TYPE_11025HZ_ADPCM ||
ioContext->buf_ptr[1] == RTP_PAYLOAD_TYPE_16000HZ_ADPCM ||
ioContext->buf_ptr[1] == RTP_PAYLOAD_TYPE_22050HZ_ADPCM
) {
/* Calculate the size of the sample data */
sampleSize = packetSize - SIZEOF_RTP_HEADER;
/* Create a new AVPacket */
if( av_new_packet( pkt, sampleSize ) >= 0 ) {
isPacketAlloced = 1;
/* Copy data into packet */
audiodata_network2host(pkt->data, &ioContext->buf_ptr[SIZEOF_RTP_HEADER], sampleSize);
/* Configure stream info */
if( (st = ad_get_audio_stream(s, NULL)) != NULL ) {
pkt->stream_index = st->index;
pkt->duration = ((int)(AV_TIME_BASE * 1.0));
#ifdef AD_SIDEDATA_IN_PRIV
if( (frameData = av_malloc(sizeof(*frameData))) != NULL ) {
/* Set the frame info up */
frameData->frameType = RTPAudio;
frameData->frameData = (void*)(&ioContext->buf_ptr[1]);
frameData->additionalData = NULL;
pkt->priv = (void*)frameData;
retVal = 0;
}
else
retVal = AVERROR(ENOMEM);
#endif
}
}
}
}
/* Check whether we need to release the packet data we allocated */
if( retVal < 0 && isPacketAlloced != 0 ) {
av_free_packet( pkt );
}
return retVal;
}
/**
* Audio frame with a Netvu header
*/
static int ad_read_audio(AVFormatContext *s,
AVPacket *pkt, int size,
struct NetVuAudioData *data,
enum AVCodecID codec_id)
{
AVIOContext *pb = s->pb;
int status;
// Get the fixed size portion of the audio header
size = NetVuAudioDataHeaderSize - sizeof(unsigned char *);
if (avio_read( pb, (uint8_t*)data, size) != size)
return ADFFMPEG_AD_ERROR_AUDIO_ADPCM_GET_BUFFER;
// endian fix it...
audioheader_network2host(data, (uint8_t*)data);
// Now get the additional bytes
if( data->sizeOfAdditionalData > 0 ) {
data->additionalData = av_malloc( data->sizeOfAdditionalData );
if( data->additionalData == NULL )
return AVERROR(ENOMEM);
if (avio_read( pb, data->additionalData, data->sizeOfAdditionalData) != data->sizeOfAdditionalData)
return ADFFMPEG_AD_ERROR_AUDIO_ADPCM_GET_BUFFER2;
}
else
data->additionalData = NULL;
status = av_get_packet(pb, pkt, data->sizeOfAudioData);
if (status < 0) {
av_log(s, AV_LOG_ERROR, "%s: av_get_packet (size %d) failed, status %d\n",
__func__, data->sizeOfAudioData, status);
return ADFFMPEG_AD_ERROR_AUDIO_ADPCM_MIME_NEW_PACKET;
}
if (codec_id == CODEC_ID_ADPCM_IMA_WAV)
audiodata_network2host(pkt->data, pkt->data, data->sizeOfAudioData);
return status;
}