fix total bitrate computation, based on patch by corp186, chasedouglas at gmail dot com

[frescor/ffmpeg.git] / libavformat / mpegtsenc.c

diff --git a/libavformat/mpegtsenc.c b/libavformat/mpegtsenc.c
index 6c31f6df5125507c56781236f5fa6ceaabaa9f53..239b0353853161646d0217cd24cd41a0d1bf0f95 100644 (file)
--- a/libavformat/mpegtsenc.c
+++ b/libavformat/mpegtsenc.c
@@ -1,6 +1,6 @@
 /*
  * MPEG2 transport stream (aka DVB) muxer
- * Copyright (c) 2003 Fabrice Bellard.
+ * Copyright (c) 2003 Fabrice Bellard
  *
  * This file is part of FFmpeg.
  *
@@ -216,6 +216,7 @@ static void mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
     for(i = 0; i < s->nb_streams; i++) {
         AVStream *st = s->streams[i];
         MpegTSWriteStream *ts_st = st->priv_data;
+        AVMetadataTag *lang = av_metadata_get(st->metadata, "language", NULL,0);
         switch(st->codec->codec_id) {
         case CODEC_ID_MPEG1VIDEO:
         case CODEC_ID_MPEG2VIDEO:
@@ -252,21 +253,19 @@ static void mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
         /* write optional descriptors here */
         switch(st->codec->codec_type) {
         case CODEC_TYPE_AUDIO:
-            if (strlen(st->language) == 3) {
+            if (lang && strlen(lang->value) == 3) {
                 *q++ = 0x0a; /* ISO 639 language descriptor */
                 *q++ = 4;
-                *q++ = st->language[0];
-                *q++ = st->language[1];
-                *q++ = st->language[2];
+                *q++ = lang->value[0];
+                *q++ = lang->value[1];
+                *q++ = lang->value[2];
                 *q++ = 0; /* undefined type */
             }
             break;
         case CODEC_TYPE_SUBTITLE:
             {
                 const char *language;
-                language = st->language;
-                if (strlen(language) != 3)
-                    language = "eng";
+                language = lang && strlen(lang->value)==3 ? lang->value : "eng";
                 *q++ = 0x59;
                 *q++ = 8;
                 *q++ = language[0];
@@ -383,15 +382,16 @@ static int mpegts_write_header(AVFormatContext *s)
     MpegTSWriteStream *ts_st;
     MpegTSService *service;
     AVStream *st;
+    AVMetadataTag *title;
     int i, total_bit_rate;
     const char *service_name;
+    uint64_t sdt_size, pat_pmt_size, pos;
 
     ts->tsid = DEFAULT_TSID;
     ts->onid = DEFAULT_ONID;
     /* allocate a single DVB service */
-    service_name = s->title;
-    if (service_name[0] == '\0')
-        service_name = DEFAULT_SERVICE_NAME;
+    title = av_metadata_get(s->metadata, "title", NULL, 0);
+    service_name = title ? title->value : DEFAULT_SERVICE_NAME;
     service = mpegts_add_service(ts, DEFAULT_SID,
                                  DEFAULT_PROVIDER_NAME, service_name);
     service->pmt.write_packet = section_write_packet;
@@ -440,20 +440,39 @@ static int mpegts_write_header(AVFormatContext *s)
         (TS_PACKET_SIZE * 8 * 1000);
     ts->pat_packet_freq = (total_bit_rate * PAT_RETRANS_TIME) /
         (TS_PACKET_SIZE * 8 * 1000);
-#if 0
-    printf("%d %d %d\n",
-           total_bit_rate, ts->sdt_packet_freq, ts->pat_packet_freq);
-#endif
 
-    ts->mux_rate = total_bit_rate;
+    ts->mux_rate = 1; // avoid div by 0
 
     /* write info at the start of the file, so that it will be fast to
        find them */
+    pos = url_ftell(s->pb);
     mpegts_write_sdt(s);
+    sdt_size = url_ftell(s->pb) - pos;
+    pos = url_ftell(s->pb);
     mpegts_write_pat(s);
     for(i = 0; i < ts->nb_services; i++) {
         mpegts_write_pmt(s, ts->services[i]);
     }
+    pat_pmt_size = url_ftell(s->pb) - pos;
+
+    total_bit_rate +=
+        total_bit_rate * 25 / DEFAULT_PES_PAYLOAD_SIZE + /* PES header size */
+        total_bit_rate *  4 / TS_PACKET_SIZE           + /* TS  header size */
+        SDT_RETRANS_TIME * 8 * sdt_size     / 1000     + /* SDT size */
+        PAT_RETRANS_TIME * 8 * pat_pmt_size / 1000     + /* PAT+PMT size */
+        PCR_RETRANS_TIME * 8 * 8            / 1000;      /* PCR size */
+
+    av_log(s, AV_LOG_DEBUG, "muxrate %d freq sdt %d pat %d\n",
+           total_bit_rate, ts->sdt_packet_freq, ts->pat_packet_freq);
+
+    if (s->mux_rate)
+        ts->mux_rate = s->mux_rate;
+    else
+        ts->mux_rate = total_bit_rate;
+
+    // adjust pcr
+    ts->cur_pcr /= ts->mux_rate;
+
     put_flush_packet(s->pb);
 
     return 0;
@@ -671,20 +690,27 @@ static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
     AVStream *st = s->streams[pkt->stream_index];
     int size= pkt->size;
     uint8_t *buf= pkt->data;
+    uint8_t *data= NULL;
     MpegTSWriteStream *ts_st = st->priv_data;
     int len, max_payload_size;
     const uint8_t *access_unit_index = NULL;
     const uint64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
+    int64_t dts = AV_NOPTS_VALUE, pts = AV_NOPTS_VALUE;
+
+    if (pkt->pts != AV_NOPTS_VALUE)
+        pts = pkt->pts + delay;
+    if (pkt->dts != AV_NOPTS_VALUE)
+        dts = pkt->dts + delay;
 
     if (st->codec->codec_type == CODEC_TYPE_SUBTITLE) {
         /* for subtitle, a single PES packet must be generated */
-        mpegts_write_pes(s, st, buf, size, pkt->pts, AV_NOPTS_VALUE);
+        mpegts_write_pes(s, st, buf, size, pts, AV_NOPTS_VALUE);
         return 0;
     }
 
     if (st->codec->codec_id == CODEC_ID_DIRAC) {
         /* for Dirac, a single PES packet must be generated */
-        mpegts_write_pes(s, st, buf, size, pkt->pts, pkt->dts);
+        mpegts_write_pes(s, st, buf, size, pts, dts);
         return 0;
     }
     max_payload_size = DEFAULT_PES_PAYLOAD_SIZE;
@@ -700,7 +726,24 @@ static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
                 break;
             }
         }
-    } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
+    } if (st->codec->codec_id == CODEC_ID_H264) {
+        if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001) {
+            av_log(s, AV_LOG_ERROR, "h264 bitstream malformated\n");
+            return -1;
+        }
+        if (pkt->data[4] != 0x09) { // AUD NAL
+            data = av_malloc(pkt->size+6);
+            if (!data)
+                return -1;
+            memcpy(data+6, pkt->data, pkt->size);
+            AV_WB32(data, 0x00000001);
+            data[4] = 0x09;
+            data[5] = 0xe0; // any slice type
+            buf  = data;
+            size = pkt->size+6;
+        }
+        access_unit_index = buf;
+    } else {
         access_unit_index = pkt->data;
     }
 
@@ -720,8 +763,8 @@ static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
         if (access_unit_index && access_unit_index < buf &&
             ts_st->payload_pts == AV_NOPTS_VALUE &&
             ts_st->payload_dts == AV_NOPTS_VALUE) {
-            ts_st->payload_dts = pkt->dts + delay;
-            ts_st->payload_pts = pkt->pts + delay;
+            ts_st->payload_dts = dts;
+            ts_st->payload_pts = pts;
         }
         if (ts_st->payload_index >= max_payload_size) {
             mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_index,
@@ -732,6 +775,9 @@ static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
             access_unit_index = NULL; // unset access unit to avoid setting pts/dts again
         }
     }
+
+    av_free(data);
+
     return 0;
 }