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author | uau <uau@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2006-06-14 19:48:54 +0000 |
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committer | uau <uau@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2006-06-14 19:48:54 +0000 |
commit | 67233233030d593dd4939f2eb167c0016c3e0b4f (patch) | |
tree | 5aecf0377d69b69dc7ab506b254c073eed9f2d66 /mplayer.c | |
parent | 2727b16cbb4168893b2e73a0090ee8f083002eba (diff) | |
download | mpv-67233233030d593dd4939f2eb167c0016c3e0b4f.tar.bz2 mpv-67233233030d593dd4939f2eb167c0016c3e0b4f.tar.xz |
Clean up audio pts handling, make audio pts tracking in the audio-only
case work the same as with video.
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@18713 b3059339-0415-0410-9bf9-f77b7e298cf2
Diffstat (limited to 'mplayer.c')
-rw-r--r-- | mplayer.c | 92 |
1 files changed, 62 insertions, 30 deletions
@@ -2415,6 +2415,58 @@ if(sh_audio){ ///@} // Command2Property + +// Return pts value corresponding to the end point of audio written to the +// ao so far. +static double written_audio_pts(sh_audio_t *sh_audio, demux_stream_t *d_audio) +{ + // first calculate the end pts of audio that has been output by decoder + double a_pts = sh_audio->pts; + if (a_pts != MP_NOPTS_VALUE) + // Good, decoder supports new way of calculating audio pts. + // sh_audio->pts is the timestamp of the latest input packet with + // known pts that the decoder has decoded. sh_audio->pts_bytes is + // the amount of bytes the decoder has written after that timestamp. + a_pts += sh_audio->pts_bytes / (double) sh_audio->o_bps; + else { + // Decoder doesn't support new way of calculating pts (or we're + // being called before it has decoded anything with known timestamp). + // Use the old method of audio pts calculation: take the timestamp + // of last packet with known pts the decoder has read data from, + // and add amount of bytes read after the beginning of that packet + // divided by input bps. This will be inaccurate if the input/output + // ratio is not constant for every audio packet or if it is constant + // but not accurately known in sh_audio->i_bps. + + a_pts = d_audio->pts; + // ds_tell_pts returns gets bytes read after last timestamp from + // demuxing layer, decoder might use sh_audio->a_in_buffer for bytes + // it has read but not decoded + a_pts += (ds_tell_pts(d_audio) - sh_audio->a_in_buffer_len) / + (double)sh_audio->i_bps; + } + // Now a_pts hopefully holds the pts for end of audio from decoder. + // Substract data in buffers between decoder and audio out. + + // Decoded but not filtered + a_pts -= sh_audio->a_buffer_len / (double)sh_audio->o_bps; + + // Data that was ready for ao but was buffered because ao didn't fully + // accept everything to internal buffers yet + a_pts -= sh_audio->a_out_buffer_len * playback_speed / (double)ao_data.bps; + + return a_pts; +} + +// Return pts value corresponding to currently playing audio. +static double playing_audio_pts(sh_audio_t *sh_audio, demux_stream_t *d_audio, + ao_functions_t *audio_out) +{ + return written_audio_pts(sh_audio, d_audio) - playback_speed * + audio_out->get_delay(); +} + + int main(int argc,char* argv[]){ @@ -3539,7 +3591,6 @@ int dropped_frames=0; // how many frames dropped since last non-dropped frame int too_slow_frame_cnt=0; int too_fast_frame_cnt=0; // for auto-quality: -float AV_delay=0; // average of A-V timestamp differences double vdecode_time; unsigned int lastframeout_ts=0; /*float time_frame_corr_avg=0;*/ /* unused */ @@ -3678,7 +3729,7 @@ while(sh_audio){ if(!sh_video) { // handle audio-only case: if(!quiet) { - float a_pos = sh_audio->delay - audio_out->get_delay() * playback_speed; + double a_pos = playing_audio_pts(sh_audio, d_audio, audio_out); print_status(a_pos, 0, 0); } if(d_audio->eof && sh_audio->a_in_buffer_len <= 0 && sh_audio->a_buffer_len <= 0) eof = PT_NEXT_ENTRY; @@ -3923,13 +3974,9 @@ if(time_frame>0.001 && !(vo_flags&256)){ current_module="av_sync"; if(sh_audio){ - double a_pts=0; - double v_pts=0; - - // unplayed bytes in our and soundcard/dma buffer: - float delay=playback_speed*audio_out->get_delay()+(float)sh_audio->a_buffer_len/(float)sh_audio->o_bps; + double a_pts, v_pts; - if (autosync){ + if (autosync) /* * If autosync is enabled, the value for delay must be calculated * a bit differently. It is set only to the difference between @@ -3941,31 +3988,16 @@ if(time_frame>0.001 && !(vo_flags&256)){ * value here, even a "corrected" one, would be incompatible with * autosync mode.) */ - delay=sh_audio->delay; - delay+=(float)sh_audio->a_buffer_len/(float)sh_audio->o_bps; - } - delay += sh_audio->a_out_buffer_len*playback_speed/(float)ao_data.bps; + a_pts = written_audio_pts(sh_audio, d_audio) - sh_audio->delay; + else + a_pts = playing_audio_pts(sh_audio, d_audio, audio_out); - { - // PTS = (last timestamp) + (bytes after last timestamp)/(bytes per sec) - a_pts = sh_audio->pts; - if (a_pts == MP_NOPTS_VALUE) { - // Decoder doesn't support tracking timestamps or demuxer doesn't - // set them properly in individual packets, use old inaccurate method - a_pts=d_audio->pts; - a_pts+=(ds_tell_pts(d_audio)-sh_audio->a_in_buffer_len)/(float)sh_audio->i_bps; - } - else - a_pts += sh_audio->pts_bytes / (float)sh_audio->o_bps; - } v_pts=sh_video ? sh_video->pts : d_video->pts; - mp_dbg(MSGT_AVSYNC,MSGL_DBG2,"### A:%8.3f (%8.3f) V:%8.3f A-V:%7.4f \n",a_pts,a_pts-audio_delay-delay,v_pts,(a_pts-delay-audio_delay)-v_pts); - { static int drop_message=0; - float x; - AV_delay=(a_pts-delay-audio_delay)-v_pts; + double AV_delay = a_pts - audio_delay - v_pts; + double x; if(AV_delay>0.5 && drop_frame_cnt>50 && drop_message==0){ ++drop_message; mp_msg(MSGT_AVSYNC,MSGL_WARN,MSGTR_SystemTooSlow); @@ -3985,7 +4017,7 @@ if(time_frame>0.001 && !(vo_flags&256)){ max_pts_correction=sh_video->frametime*0.10; // +-10% of time if(!frame_time_remaining){ sh_audio->delay+=x; c_total+=x;} // correction if(!quiet) - print_status(a_pts - audio_delay - delay, AV_delay, c_total); + print_status(a_pts - audio_delay, AV_delay, c_total); } } else { @@ -4570,7 +4602,7 @@ if (stream->type==STREAMTYPE_DVDNAV && dvd_nav_still) pos = sh_video->pts; else if (sh_audio && audio_out) - pos = sh_audio->delay - audio_out->get_delay() * playback_speed; + pos = playing_audio_pts(sh_audio, d_audio, audio_out); mp_msg(MSGT_GLOBAL, MSGL_INFO, "ANS_TIME_POSITION=%.1f\n", pos); } break; case MP_CMD_SWITCH_AUDIO : { |