int bg_nle_audio_compositor_read(void * priv, gavl_audio_frame_t* ret, int stream,
int num_samples)
{
bg_nle_audio_compositor_t * c = priv;
stream_t * s;
int i = c->num_streams;
gavl_audio_frame_mute(ret, &c->format);
while(--i)
{
s = &c->streams[i];
}
return 0;
}
static gavl_source_status_t decode_frame_mad(bgav_stream_t * s)
{
mad_priv_t * priv;
int i, j;
gavl_source_status_t st;
int got_frame;
int flush = 0;
priv = s->decoder_priv;
if(priv->eof)
return GAVL_SOURCE_EOF;
while(1)
{
st = get_data(s);
switch(st)
{
case GAVL_SOURCE_AGAIN:
return st;
break;
case GAVL_SOURCE_EOF:
flush = 1;
break;
case GAVL_SOURCE_OK:
break;
}
got_frame = 1;
mad_stream_buffer(&priv->stream, priv->buf.buffer,
priv->buf.size + flush * MAD_BUFFER_GUARD);
if(priv->do_init)
{
get_format(s);
priv->do_init = 0;
}
if(mad_frame_decode(&priv->frame, &priv->stream) == -1)
{
got_frame = 0;
if(priv->stream.error != MAD_ERROR_BUFLEN)
{
/* This is often a spurious error, which ALWAYS occurs for ripped radio stations */
if(priv->stream.error != MAD_ERROR_BADDATAPTR)
bgav_log(s->opt, BGAV_LOG_ERROR, LOG_DOMAIN, "Decode failed %s\n",
mad_stream_errorstr(&priv->stream));
break;
}
}
else
break;
if(!got_frame && flush)
return GAVL_SOURCE_EOF;
}
if(got_frame)
{
// fprintf(stderr, "Decodes %ld bytes\n", priv->stream.next_frame - priv->stream.buffer);
mad_synth_frame(&priv->synth, &priv->frame);
for(i = 0; i < s->data.audio.format.num_channels; i++)
{
for(j = 0; j < s->data.audio.format.samples_per_frame; j++)
{
if (priv->synth.pcm.samples[i][j] >= MAD_F_ONE)
priv->synth.pcm.samples[i][j] = MAD_F_ONE - 1;
else if (priv->synth.pcm.samples[i][j] < -MAD_F_ONE)
priv->synth.pcm.samples[i][j] = -MAD_F_ONE;
priv->audio_frame->channels.f[i][j] =
(float)(priv->synth.pcm.samples[i][j]) /
(float)MAD_F_ONE;
}
}
priv->audio_frame->valid_samples = s->data.audio.format.samples_per_frame;
}
else
gavl_audio_frame_mute(priv->audio_frame, &s->data.audio.format);
if(flush && priv->last_duration &&
(priv->last_duration < priv->audio_frame->valid_samples))
priv->audio_frame->valid_samples = priv->last_duration;
gavl_audio_frame_copy_ptrs(&s->data.audio.format,
s->data.audio.frame, priv->audio_frame);
#if 0
fprintf(stderr, "Done decode %ld %ld\n",
priv->stream.this_frame - priv->stream.buffer,
priv->stream.next_frame - priv->stream.this_frame);
#endif
s->flags |= STREAM_HAVE_FRAME;
bgav_bytebuffer_remove(&priv->buf,
priv->stream.next_frame - priv->stream.buffer);
if(flush)
priv->eof = 1;
return GAVL_SOURCE_OK;
}
bool ReadMedia::initFormat() {
const gavl_audio_format_t * open_audio_format;
const gavl_video_format_t * open_video_format;
// we use the m_vfifosize to see if the user app wants video or not
// then, we set m_video_stream_count to 0 if he doesn't want video
if (m_video_stream_count > 0 && m_vfifosize > 0) {
open_video_format = bgav_get_video_format(m_file, 0);
if (open_video_format->pixelformat == GAVL_PIXELFORMAT_NONE) {
printf("!!!sorry, pixelformat is not recognized.\n");
return false;
}
// let's check to see if the formats are the same, if they are the same
// there is no reason to recreate the fifo or frames
if ( gavl_video_formats_equal( &m_video_format, open_video_format) == 0 ) {
// the formats are different
gavl_video_format_copy (&m_video_format, open_video_format);
if (m_video_frame != NULL)
gavl_video_frame_destroy(m_video_frame);
m_video_frame = gavl_video_frame_create(&m_video_format);
gavl_video_frame_clear( m_video_frame, &m_video_format);
if (m_fifovideo != NULL)
delete m_fifovideo;
m_fifovideo= new FifoVideoFrames( m_vfifosize , &m_video_format);
}
} else {
m_video_stream_count = 0;
m_veof = true;
}
// we use the m_afifosize to see if the user app wants audio or not
// then, we set m_audio_stream_count to 0 if he doesn't want audio
if (m_audio_stream_count > 0 && m_afifosize > 0) {
open_audio_format = bgav_get_audio_format(m_file, 0);
// we can get audio formats that are unkown
if ( open_audio_format->sample_format == GAVL_SAMPLE_NONE) {
printf("sorry, this file has unsupported audio.\n");
return false;
}
if ( gavl_audio_formats_equal(&m_audio_format, open_audio_format) == 0 ) {
// audio formats are different
// save the old spf
int spf = m_audio_format.samples_per_frame;
gavl_audio_format_copy(&m_audio_format, open_audio_format);
if (m_audio_frame != NULL) {
gavl_audio_frame_destroy(m_audio_frame);
}
// set it back to original
m_audio_format.samples_per_frame = spf ;
m_audio_frame = gavl_audio_frame_create(&m_audio_format);
gavl_audio_frame_mute( m_audio_frame, &m_audio_format);
if( m_fifoaudio != NULL )
delete m_fifoaudio;
m_fifoaudio = new FifoAudioFrames( m_afifosize , &m_audio_format);
}
} else {
// user doesn't want audio
m_audio_stream_count = 0;
m_aeof=true;
}
m_length_in_gavltime = bgav_get_duration ( m_file, 0);;
m_length_in_seconds = gavl_time_to_seconds( m_length_in_gavltime );
m_num_samples = 0;
m_num_frames = 0;
if (m_audio_stream_count) {
if ( bgav_can_seek_sample(m_file) == 1 ) {
m_num_samples= bgav_audio_duration ( m_file, 0) ;
} else {
m_num_samples= gavl_time_to_samples( m_audio_format.samplerate , bgav_get_duration ( m_file, 0) );
}
}
// set frames WE NEED TO take care here for non-constant frame-rates
if(m_video_stream_count) {
if ( bgav_can_seek_sample(m_file) == 1 && m_video_format.framerate_mode == GAVL_FRAMERATE_CONSTANT) {
m_num_frames = bgav_video_duration ( m_file, 0)/ m_video_format.frame_duration;
} else if ( bgav_can_seek_sample(m_file) == 1 && m_video_format.framerate_mode == GAVL_FRAMERATE_VARIABLE ) {
// FIXME what to do with non constant frame rates?
m_num_frames=0;
} else {
m_num_frames = gavl_time_to_frames( m_video_format.timescale, m_video_format.frame_duration , bgav_get_duration ( m_file, 0) );
}
}
// printf("m_num_frames =%lld, duration = %lld , vid_duration=%lld\n",
// m_num_frames, bgav_get_duration ( m_file, 0), bgav_video_duration ( m_file, 0) );
// set seconds
if ( bgav_can_seek_sample(m_file) == 1) {
gavl_time_t atime=0,vtime=0;
if ( m_audio_stream_count )
atime = gavl_samples_to_time( m_audio_format.samplerate, m_num_samples );
if (m_video_stream_count && m_video_format.frame_duration > 0) {
vtime = gavl_frames_to_time( m_video_format.timescale, m_video_format.frame_duration, m_num_frames );
} else if ( m_video_stream_count ) { // non constant framerate
vtime = bgav_video_duration( m_file, 0);
}
// else rely on audio time
m_length_in_gavltime = atime > vtime ? atime :vtime;
m_length_in_seconds = gavl_time_to_seconds( m_length_in_gavltime );
//printf("atime=%ld, vtime=%ld, l_in_sec=%f\n", atime, vtime, m_length_in_seconds);
}
m_pcm_seek = SEEK_NOTHING;
m_frame_seek = SEEK_NOTHING;
return true;
}
