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@ -355,13 +355,6 @@ int av_open_input_stream(AVFormatContext **ic_ptr, |
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ic->priv_data = NULL; |
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} |
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/* default pts settings is MPEG like */ |
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av_set_pts_info(ic, 33, 1, 90000); |
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ic->last_pkt_pts = AV_NOPTS_VALUE; |
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ic->last_pkt_dts = AV_NOPTS_VALUE; |
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ic->last_pkt_stream_pts = AV_NOPTS_VALUE; |
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ic->last_pkt_stream_dts = AV_NOPTS_VALUE; |
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err = ic->iformat->read_header(ic, ap); |
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if (err < 0) |
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goto fail; |
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@ -499,7 +492,7 @@ int av_read_packet(AVFormatContext *s, AVPacket *pkt) |
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wrapping is handled by considering the next PTS/DTS as a delta to |
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the previous value. We handle the delta as a fraction to avoid any |
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rounding errors. */ |
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static inline int64_t convert_timestamp_units(AVFormatContext *s, |
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static inline int64_t convert_timestamp_units(AVStream *s, |
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int64_t *plast_pkt_pts, |
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int *plast_pkt_pts_frac, |
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int64_t *plast_pkt_stream_pts, |
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@ -515,17 +508,18 @@ static inline int64_t convert_timestamp_units(AVFormatContext *s, |
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shift = 64 - s->pts_wrap_bits; |
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delta_pts = ((stream_pts - *plast_pkt_stream_pts) << shift) >> shift; |
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/* XXX: overflow possible but very unlikely as it is a delta */ |
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delta_pts = delta_pts * AV_TIME_BASE * s->pts_num; |
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pts = *plast_pkt_pts + (delta_pts / s->pts_den); |
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pts_frac = *plast_pkt_pts_frac + (delta_pts % s->pts_den); |
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if (pts_frac >= s->pts_den) { |
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pts_frac -= s->pts_den; |
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delta_pts = delta_pts * AV_TIME_BASE * s->time_base.num; |
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pts = *plast_pkt_pts + (delta_pts / s->time_base.den); |
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pts_frac = *plast_pkt_pts_frac + (delta_pts % s->time_base.den); |
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if (pts_frac >= s->time_base.den) { |
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pts_frac -= s->time_base.den; |
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pts++; |
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} |
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} else { |
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/* no previous pts, so no wrapping possible */ |
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pts = (int64_t)(((double)stream_pts * AV_TIME_BASE * s->pts_num) /
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(double)s->pts_den); |
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// pts = av_rescale(stream_pts, (int64_t)AV_TIME_BASE * s->time_base.num, s->time_base.den);
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pts = (int64_t)(((double)stream_pts * AV_TIME_BASE * s->time_base.num) /
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(double)s->time_base.den); |
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pts_frac = 0; |
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} |
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*plast_pkt_stream_pts = stream_pts; |
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@ -752,15 +746,17 @@ static int av_read_frame_internal(AVFormatContext *s, AVPacket *pkt) |
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/* no more packets: really terminates parsing */ |
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return ret; |
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} |
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st = s->streams[s->cur_pkt.stream_index]; |
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/* convert the packet time stamp units and handle wrapping */ |
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s->cur_pkt.pts = convert_timestamp_units(s,
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&s->last_pkt_pts, &s->last_pkt_pts_frac, |
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&s->last_pkt_stream_pts, |
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s->cur_pkt.pts = convert_timestamp_units(st,
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&st->last_pkt_pts, &st->last_pkt_pts_frac, |
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&st->last_pkt_stream_pts, |
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s->cur_pkt.pts); |
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s->cur_pkt.dts = convert_timestamp_units(s,
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&s->last_pkt_dts, &s->last_pkt_dts_frac, |
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&s->last_pkt_stream_dts, |
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s->cur_pkt.dts = convert_timestamp_units(st,
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&st->last_pkt_dts, &st->last_pkt_dts_frac, |
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&st->last_pkt_stream_dts, |
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s->cur_pkt.dts); |
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#if 0 |
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if (s->cur_pkt.stream_index == 0) { |
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@ -772,14 +768,10 @@ static int av_read_frame_internal(AVFormatContext *s, AVPacket *pkt) |
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(double)s->cur_pkt.dts / AV_TIME_BASE); |
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} |
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#endif |
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/* duration field */ |
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if (s->cur_pkt.duration != 0) { |
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s->cur_pkt.duration = ((int64_t)s->cur_pkt.duration * AV_TIME_BASE * s->pts_num) /
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s->pts_den; |
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} |
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s->cur_pkt.duration = av_rescale(s->cur_pkt.duration, AV_TIME_BASE * (int64_t)st->time_base.num, st->time_base.den); |
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st = s->streams[s->cur_pkt.stream_index]; |
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s->cur_st = st; |
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s->cur_ptr = s->cur_pkt.data; |
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s->cur_len = s->cur_pkt.size; |
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@ -1355,7 +1347,7 @@ static void av_estimate_timings_from_pts(AVFormatContext *ic) |
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st = ic->streams[pkt->stream_index]; |
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if (pkt->pts != AV_NOPTS_VALUE) { |
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if (st->start_time == AV_NOPTS_VALUE) |
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st->start_time = (int64_t)((double)pkt->pts * ic->pts_num * (double)AV_TIME_BASE / ic->pts_den); |
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st->start_time = av_rescale(pkt->pts, st->time_base.num * (int64_t)AV_TIME_BASE, st->time_base.den); |
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} |
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av_free_packet(pkt); |
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} |
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@ -1398,7 +1390,7 @@ static void av_estimate_timings_from_pts(AVFormatContext *ic) |
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read_size += pkt->size; |
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st = ic->streams[pkt->stream_index]; |
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if (pkt->pts != AV_NOPTS_VALUE) { |
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end_time = (int64_t)((double)pkt->pts * ic->pts_num * (double)AV_TIME_BASE / ic->pts_den); |
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end_time = av_rescale(pkt->pts, st->time_base.num * (int64_t)AV_TIME_BASE, st->time_base.den); |
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duration = end_time - st->start_time; |
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if (duration > 0) { |
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if (st->duration == AV_NOPTS_VALUE || |
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@ -1776,6 +1768,14 @@ AVStream *av_new_stream(AVFormatContext *s, int id) |
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st->id = id; |
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st->start_time = AV_NOPTS_VALUE; |
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st->duration = AV_NOPTS_VALUE; |
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/* default pts settings is MPEG like */ |
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av_set_pts_info(st, 33, 1, 90000); |
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st->last_pkt_pts = AV_NOPTS_VALUE; |
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st->last_pkt_dts = AV_NOPTS_VALUE; |
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st->last_pkt_stream_pts = AV_NOPTS_VALUE; |
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st->last_pkt_stream_dts = AV_NOPTS_VALUE; |
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s->streams[s->nb_streams++] = st; |
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return st; |
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} |
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@ -1814,8 +1814,6 @@ int av_write_header(AVFormatContext *s) |
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int ret, i; |
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AVStream *st; |
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/* default pts settings is MPEG like */ |
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av_set_pts_info(s, 33, 1, 90000); |
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ret = s->oformat->write_header(s); |
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if (ret < 0) |
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return ret; |
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@ -1827,11 +1825,11 @@ int av_write_header(AVFormatContext *s) |
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switch (st->codec.codec_type) { |
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case CODEC_TYPE_AUDIO: |
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av_frac_init(&st->pts, 0, 0,
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(int64_t)s->pts_num * st->codec.sample_rate); |
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(int64_t)st->time_base.num * st->codec.sample_rate); |
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break; |
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case CODEC_TYPE_VIDEO: |
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av_frac_init(&st->pts, 0, 0,
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(int64_t)s->pts_num * st->codec.frame_rate); |
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(int64_t)st->time_base.num * st->codec.frame_rate); |
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break; |
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default: |
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break; |
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@ -1858,7 +1856,7 @@ int av_write_frame(AVFormatContext *s, int stream_index, const uint8_t *buf, |
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int ret, frame_size; |
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st = s->streams[stream_index]; |
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pts_mask = (1LL << s->pts_wrap_bits) - 1; |
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pts_mask = (1LL << st->pts_wrap_bits) - 1; |
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/* HACK/FIXME we skip all zero size audio packets so a encoder can pass pts by outputing zero size packets */ |
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if(st->codec.codec_type==CODEC_TYPE_AUDIO && size==0) |
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@ -1878,13 +1876,11 @@ int av_write_frame(AVFormatContext *s, int stream_index, const uint8_t *buf, |
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/* HACK/FIXME, we skip the initial 0-size packets as they are most likely equal to the encoder delay,
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but it would be better if we had the real timestamps from the encoder */ |
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if (frame_size >= 0 && (size || st->pts.num!=st->pts.den>>1 || st->pts.val)) { |
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av_frac_add(&st->pts,
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(int64_t)s->pts_den * frame_size); |
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av_frac_add(&st->pts, (int64_t)st->time_base.den * frame_size); |
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} |
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break; |
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case CODEC_TYPE_VIDEO: |
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av_frac_add(&st->pts,
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(int64_t)s->pts_den * st->codec.frame_rate_base); |
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av_frac_add(&st->pts, (int64_t)st->time_base.den * st->codec.frame_rate_base); |
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break; |
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default: |
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break; |
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@ -2375,12 +2371,12 @@ void url_split(char *proto, int proto_size, |
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* @param pts_num numerator to convert to seconds (MPEG: 1)
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* @param pts_den denominator to convert to seconds (MPEG: 90000) |
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*/ |
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void av_set_pts_info(AVFormatContext *s, int pts_wrap_bits, |
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void av_set_pts_info(AVStream *s, int pts_wrap_bits, |
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int pts_num, int pts_den) |
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{ |
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s->pts_wrap_bits = pts_wrap_bits; |
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s->pts_num = pts_num; |
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s->pts_den = pts_den; |
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s->time_base.num = pts_num; |
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s->time_base.den = pts_den; |
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} |
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/* fraction handling */ |
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Michael Niedermayer
21 years ago