static int Ogg_ReadPage ( demux_t *, ogg_page * );
static void Ogg_UpdatePCR ( logical_stream_t *, ogg_packet * );
static void Ogg_DecodePacket ( demux_t *, logical_stream_t *, ogg_packet * );
+static int Ogg_OpusPacketDuration( logical_stream_t *, ogg_packet * );
static int Ogg_BeginningOfStream( demux_t *p_demux );
static int Ogg_FindLogicalStreams( demux_t *p_demux );
p_stream->b_reinit = true;
p_stream->i_pcr = VLC_TS_0;
p_stream->i_interpolated_pcr = VLC_TS_0;
+ p_stream->i_previous_granulepos = -1;
es_out_Control( p_demux->out, ES_OUT_SET_PCR, VLC_TS_0);
}
if( p_stream->i_pcr >= 0 )
{
p_stream->b_reinit = false;
+ /* For Opus, trash the first 80 ms of decoded output as
+ well, to avoid blowing out speakers if we get unlucky.
+ Opus predicts content from prior frames, which can go
+ badly if we seek right where the stream goes from very
+ quiet to very loud. It will converge after a bit. */
+ if( p_stream->fmt.i_codec == VLC_CODEC_OPUS )
+ {
+ ogg_int64_t start_time;
+ int duration;
+ p_stream->i_skip_frames = 80*48;
+ /* Make sure we never play audio from within the
+ pre-skip at the beginning of the stream. */
+ duration =
+ Ogg_OpusPacketDuration( p_stream, &oggpacket );
+ start_time = p_stream->i_previous_granulepos;
+ if( duration > 0 )
+ {
+ start_time = start_time > duration ?
+ start_time - duration : 0;
+ }
+ if( p_stream->i_pre_skip > start_time )
+ {
+ p_stream->i_skip_frames +=
+ p_stream->i_pre_skip - start_time;
+ }
+ }
}
else
{
p_stream->i_interpolated_pcr = -1;
+ p_stream->i_previous_granulepos = -1;
continue;
}
p_stream->b_reinit = true;
p_stream->i_pcr = -1;
p_stream->i_interpolated_pcr = -1;
+ p_stream->i_previous_granulepos = -1;
ogg_stream_reset( &p_stream->os );
}
ogg_sync_reset( &p_sys->oy );
static void Ogg_UpdatePCR( logical_stream_t *p_stream,
ogg_packet *p_oggpacket )
{
+ p_stream->i_end_trim = 0;
/* Convert the granulepos into a pcr */
if( p_oggpacket->granulepos >= 0 )
{
}
else
{
- p_stream->i_pcr = p_oggpacket->granulepos * INT64_C(1000000)
- / p_stream->f_rate;
+ ogg_int64_t sample;
+ sample = p_oggpacket->granulepos;
+ if( p_oggpacket->e_o_s &&
+ p_stream->fmt.i_codec == VLC_CODEC_OPUS &&
+ p_stream->i_previous_granulepos >= 0 )
+ {
+ int duration;
+ duration = Ogg_OpusPacketDuration( p_stream, p_oggpacket );
+ if( duration > 0 )
+ {
+ ogg_int64_t end_sample;
+ end_sample = p_stream->i_previous_granulepos + duration;
+ if( end_sample > sample )
+ p_stream->i_end_trim = (int)(end_sample - sample);
+ }
+ }
+ if (sample >= p_stream->i_pre_skip)
+ sample -= p_stream->i_pre_skip;
+ else
+ sample = 0;
+ p_stream->i_pcr = sample * INT64_C(1000000) / p_stream->f_rate;
}
- p_stream->i_pcr += 1;
+ p_stream->i_pcr += VLC_TS_0;
p_stream->i_interpolated_pcr = p_stream->i_pcr;
}
else
{
+ int duration;
p_stream->i_pcr = -1;
/* no granulepos available, try to interpolate the pcr.
if( p_stream->fmt.i_cat == VIDEO_ES )
/* 1 frame per packet */
p_stream->i_interpolated_pcr += (INT64_C(1000000) / p_stream->f_rate);
+ else if( p_stream->fmt.i_codec == VLC_CODEC_OPUS &&
+ p_stream->i_previous_granulepos >= 0 &&
+ ( duration =
+ Ogg_OpusPacketDuration( p_stream, p_oggpacket ) ) > 0 )
+ {
+ ogg_int64_t sample;
+ p_oggpacket->granulepos =
+ p_stream->i_previous_granulepos + duration;
+ sample = p_oggpacket->granulepos;
+ if (sample >= p_stream->i_pre_skip)
+ sample -= p_stream->i_pre_skip;
+ else
+ sample = 0;
+ p_stream->i_interpolated_pcr =
+ VLC_TS_0 + sample * INT64_C(1000000) / p_stream->f_rate;
+ }
else if( p_stream->fmt.i_bitrate )
+ {
p_stream->i_interpolated_pcr +=
( p_oggpacket->bytes * INT64_C(1000000) /
p_stream->fmt.i_bitrate / 8 );
+ }
}
+ p_stream->i_previous_granulepos = p_oggpacket->granulepos;
}
/****************************************************************************
p_stream->fmt.i_codec == VLC_CODEC_SPEEX ||
p_stream->fmt.i_codec == VLC_CODEC_OPUS ||
p_stream->fmt.i_codec == VLC_CODEC_FLAC )
- if (p_stream->i_pre_skip)
- {
- if( i_pts > p_stream->i_pre_skip )
- {
- i_pts -= - p_stream->i_pre_skip;
- }
- else
- {
- i_pts = 0;
- }
- }
{
if( p_stream->i_pcr >= 0 )
{
/* The granulepos is the end date of the sample */
i_pts = p_stream->i_pcr;
- if (p_stream->i_pre_skip)
- {
- if( i_pts > p_stream->i_pre_skip )
- {
- i_pts -= - p_stream->i_pre_skip;
- }
- else
- {
- i_pts = 0;
- }
- }
}
}
if( !( p_block = block_New( p_demux, p_oggpacket->bytes ) ) ) return;
- /* may need to preroll video frames after a seek */
+ /* may need to preroll after a seek */
if ( p_stream->i_skip_frames > 0 )
{
- p_block->i_flags |= BLOCK_FLAG_PREROLL;
- p_stream->i_skip_frames--;
+ if( p_stream->fmt.i_codec == VLC_CODEC_OPUS )
+ {
+ int duration;
+ duration = Ogg_OpusPacketDuration( p_stream, p_oggpacket );
+ if( p_stream->i_skip_frames > duration )
+ {
+ p_block->i_flags |= BLOCK_FLAG_PREROLL;
+ p_block->i_nb_samples = 0;
+ p_stream->i_skip_frames -= duration;
+ }
+ else
+ {
+ p_block->i_nb_samples = duration - p_stream->i_skip_frames;
+ if( p_stream->i_previous_granulepos >=
+ p_block->i_nb_samples + p_stream->i_pre_skip )
+ {
+ i_pts = VLC_TS_0 + (p_stream->i_previous_granulepos
+ - p_block->i_nb_samples - p_stream->i_pre_skip) *
+ INT64_C(1000000) / p_stream->f_rate;
+ }
+ p_stream->i_skip_frames = 0;
+ }
+ }
+ else
+ {
+ p_block->i_flags |= BLOCK_FLAG_PREROLL;
+ p_stream->i_skip_frames--;
+ }
}
+ else if( p_stream->fmt.i_codec == VLC_CODEC_OPUS )
+ p_block->i_nb_samples = Ogg_OpusPacketDuration( p_stream, p_oggpacket );
/* Normalize PTS */
else if( i_pts == -1 ) i_pts = VLC_TS_INVALID;
if( p_stream->fmt.i_cat == AUDIO_ES )
+ {
p_block->i_dts = p_block->i_pts = i_pts;
+ /* Blatant abuse of the i_length field. */
+ p_block->i_length = p_stream->i_end_trim;
+ }
else if( p_stream->fmt.i_cat == SPU_ES )
{
p_block->i_dts = p_block->i_pts = i_pts;
es_out_Send( p_demux->out, p_stream->p_es, p_block );
}
+/* Re-implemented to avoid linking against libopus from the demuxer. */
+static int Ogg_OpusPacketDuration( logical_stream_t *p_stream,
+ ogg_packet *p_oggpacket )
+{
+ static const int silk_fs_div[4] = { 6000, 3000, 1500, 1000 };
+ int toc;
+ int nframes;
+ int frame_size;
+ int nsamples;
+ int i_rate;
+ if( p_oggpacket->bytes < 1 )
+ return VLC_EGENERIC;
+ toc = p_oggpacket->packet[0];
+ switch( toc&3 )
+ {
+ case 0:
+ nframes = 1;
+ break;
+ case 1:
+ case 2:
+ nframes = 2;
+ break;
+ default:
+ if( p_oggpacket->bytes < 2 )
+ return VLC_EGENERIC;
+ nframes = p_oggpacket->packet[1]&0x3F;
+ break;
+ }
+ i_rate = (int)p_stream->fmt.audio.i_rate;
+ if( toc&0x80 )
+ frame_size = (i_rate << (toc >> 3 & 3)) / 400;
+ else if( ( toc&0x60 ) == 0x60 )
+ frame_size = i_rate/(100 >> (toc >> 3 & 1));
+ else
+ frame_size = i_rate*60 / silk_fs_div[toc >> 3 & 3];
+ nsamples = nframes*frame_size;
+ if( nsamples*25 > i_rate*3 )
+ return VLC_EGENERIC;
+ return nsamples;
+}
+
/****************************************************************************
* Ogg_FindLogicalStreams: Find the logical streams embedded in the physical
* stream and fill p_ogg.
"pre-skip: %i",
p_stream->fmt.audio.i_channels,
(int)p_stream->i_pre_skip);
+ p_stream->i_skip_frames = p_stream->i_pre_skip;
}
/* Check for Flac header (< version 1.1.1) */
else if( oggpacket.bytes >= 4 &&
free( pp_old_data[i] );
return b_match;
}
+
+static bool Ogg_IsOpusFormatCompatible( const es_format_t *p_new,
+ const es_format_t *p_old )
+{
+ unsigned pi_new_size[XIPH_MAX_HEADER_COUNT];
+ void *pp_new_data[XIPH_MAX_HEADER_COUNT];
+ unsigned i_new_count;
+ if( xiph_SplitHeaders(pi_new_size, pp_new_data, &i_new_count, p_new->i_extra, p_new->p_extra ) )
+ i_new_count = 0;
+ unsigned pi_old_size[XIPH_MAX_HEADER_COUNT];
+ void *pp_old_data[XIPH_MAX_HEADER_COUNT];
+ unsigned i_old_count;
+ if( xiph_SplitHeaders(pi_old_size, pp_old_data, &i_old_count, p_old->i_extra, p_old->p_extra ) )
+ i_old_count = 0;
+ bool b_match = false;
+ if( i_new_count == i_old_count && i_new_count > 0 )
+ {
+ static const unsigned char default_map[2] = { 0, 1 };
+ unsigned char *p_old_head;
+ unsigned char *p_new_head;
+ const unsigned char *p_old_map;
+ const unsigned char *p_new_map;
+ int i_old_channel_count;
+ int i_new_channel_count;
+ int i_old_stream_count;
+ int i_new_stream_count;
+ int i_old_coupled_count;
+ int i_new_coupled_count;
+ p_old_head = (unsigned char *)pp_old_data[0];
+ i_old_channel_count = i_old_stream_count = i_old_coupled_count = 0;
+ p_old_map = default_map;
+ if( pi_old_size[0] >= 19 && p_old_head[8] <= 15 )
+ {
+ i_old_channel_count = p_old_head[9];
+ switch( p_old_head[18] )
+ {
+ case 0:
+ i_old_stream_count = 1;
+ i_old_coupled_count = i_old_channel_count - 1;
+ break;
+ case 1:
+ if( pi_old_size[0] >= 21U + i_old_channel_count )
+ {
+ i_old_stream_count = p_old_head[19];
+ i_old_coupled_count = p_old_head[20];
+ p_old_map = p_old_head + 21;
+ }
+ break;
+ }
+ }
+ p_new_head = (unsigned char *)pp_new_data[0];
+ i_new_channel_count = i_new_stream_count = i_new_coupled_count = 0;
+ p_new_map = default_map;
+ if( pi_new_size[0] >= 19 && p_new_head[8] <= 15 )
+ {
+ i_new_channel_count = p_new_head[9];
+ switch( p_new_head[18] )
+ {
+ case 0:
+ i_new_stream_count = 1;
+ i_new_coupled_count = i_new_channel_count - 1;
+ break;
+ case 1:
+ if( pi_new_size[0] >= 21U + i_new_channel_count )
+ {
+ i_new_stream_count = p_new_head[19];
+ i_new_coupled_count = p_new_head[20];
+ p_new_map = p_new_head+21;
+ }
+ break;
+ }
+ }
+ b_match = i_old_channel_count == i_new_channel_count &&
+ i_old_stream_count == i_new_stream_count &&
+ i_old_coupled_count == i_new_coupled_count &&
+ memcmp(p_old_map, p_new_map,
+ i_new_channel_count*sizeof(*p_new_map)) == 0;
+ }
+ for( unsigned i = 0; i < i_new_count; i++ )
+ free( pp_new_data[i] );
+ for( unsigned i = 0; i < i_old_count; i++ )
+ free( pp_old_data[i] );
+ return b_match;
+}
+
static bool Ogg_LogicalStreamResetEsFormat( demux_t *p_demux, logical_stream_t *p_stream )
{
bool b_compatible = false;
if( !p_stream->fmt_old.i_cat || !p_stream->fmt_old.i_codec )
return true;
- /* Only vorbis is supported */
+ /* Only Vorbis and Opus are supported. */
if( p_stream->fmt.i_codec == VLC_CODEC_VORBIS )
b_compatible = Ogg_IsVorbisFormatCompatible( &p_stream->fmt, &p_stream->fmt_old );
+ else if( p_stream->fmt.i_codec == VLC_CODEC_OPUS )
+ b_compatible = Ogg_IsOpusFormatCompatible( &p_stream->fmt, &p_stream->fmt_old );
if( !b_compatible )
msg_Warn( p_demux, "cannot reuse old stream, resetting the decoder" );
case VLC_CODEC_THEORA:
Ogg_ExtractXiphMeta( p_demux, p_headers, i_headers, 1+6 );
break;
- case VLC_CODEC_SPEEX:
case VLC_CODEC_OPUS:
+ Ogg_ExtractXiphMeta( p_demux, p_headers, i_headers, 8 );
+ break;
+ case VLC_CODEC_SPEEX:
Ogg_ExtractXiphMeta( p_demux, p_headers, i_headers, 0 );
break;
}
static void Ogg_ReadOpusHeader( logical_stream_t *p_stream,
- ogg_packet *p_oggpacket )
+ ogg_packet *p_oggpacket )
{
oggpack_buffer opb;
p_stream->f_rate = p_stream->fmt.audio.i_rate = 48000;
p_stream->fmt.i_bitrate = 0;
- /* Cheat and get additionnal info ;) */
+ /* Cheat and get additional info ;) */
oggpack_readinit( &opb, p_oggpacket->packet, p_oggpacket->bytes);
oggpack_adv( &opb, 64 );
oggpack_adv( &opb, 8 ); /* version_id */
projects / vlc / commitdiff