[FFmpeg-soc] [soc]: r255 - dvbmuxer/split_mpeg.diff
realsun
subversion at mplayerhq.hu
Thu Jun 14 15:25:40 CEST 2007
Author: realsun
Date: Thu Jun 14 15:25:40 2007
New Revision: 255
Log:
split MPEG muxer and demuxer to prepare for PES muxer
Added:
dvbmuxer/split_mpeg.diff
Added: dvbmuxer/split_mpeg.diff
==============================================================================
--- (empty file)
+++ dvbmuxer/split_mpeg.diff Thu Jun 14 15:25:40 2007
@@ -0,0 +1,2721 @@
+Index: libavformat/Makefile
+===================================================================
+--- libavformat/Makefile (revision 9308)
++++ libavformat/Makefile (working copy)
+@@ -84,11 +84,11 @@
+ OBJS-$(CONFIG_MP3_MUXER) += mp3.o
+ OBJS-$(CONFIG_MP4_MUXER) += movenc.o riff.o isom.o
+ OBJS-$(CONFIG_MPC_DEMUXER) += mpc.o
+-OBJS-$(CONFIG_MPEG1SYSTEM_MUXER) += mpeg.o
+-OBJS-$(CONFIG_MPEG1VCD_MUXER) += mpeg.o
+-OBJS-$(CONFIG_MPEG2DVD_MUXER) += mpeg.o
+-OBJS-$(CONFIG_MPEG2VOB_MUXER) += mpeg.o
+-OBJS-$(CONFIG_MPEG2SVCD_MUXER) += mpeg.o
++OBJS-$(CONFIG_MPEG1SYSTEM_MUXER) += mpegenc.o
++OBJS-$(CONFIG_MPEG1VCD_MUXER) += mpegenc.o
++OBJS-$(CONFIG_MPEG2DVD_MUXER) += mpegenc.o
++OBJS-$(CONFIG_MPEG2VOB_MUXER) += mpegenc.o
++OBJS-$(CONFIG_MPEG2SVCD_MUXER) += mpegenc.o
+ OBJS-$(CONFIG_MPEG1VIDEO_MUXER) += raw.o
+ OBJS-$(CONFIG_MPEG2VIDEO_MUXER) += raw.o
+ OBJS-$(CONFIG_MPEGPS_DEMUXER) += mpeg.o
+Index: libavformat/mpeg.c
+===================================================================
+--- libavformat/mpeg.c (revision 9308)
++++ libavformat/mpeg.c (working copy)
+@@ -1,5 +1,5 @@
+ /*
+- * MPEG1/2 muxer and demuxer
++ * MPEG1/2 demuxer
+ * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
+ *
+ * This file is part of FFmpeg.
+@@ -21,6 +21,7 @@
+ #include "avformat.h"
+ #include "bitstream.h"
+ #include "fifo.h"
++#include "mpeg.h"
+
+ #define MAX_PAYLOAD_SIZE 4096
+ //#define DEBUG_SEEK
+@@ -28,73 +29,7 @@
+ #undef NDEBUG
+ #include <assert.h>
+
+-typedef struct PacketDesc {
+- int64_t pts;
+- int64_t dts;
+- int size;
+- int unwritten_size;
+- int flags;
+- struct PacketDesc *next;
+-} PacketDesc;
+
+-typedef struct {
+- AVFifoBuffer fifo;
+- uint8_t id;
+- int max_buffer_size; /* in bytes */
+- int buffer_index;
+- PacketDesc *predecode_packet;
+- PacketDesc *premux_packet;
+- PacketDesc **next_packet;
+- int packet_number;
+- uint8_t lpcm_header[3];
+- int lpcm_align;
+- int bytes_to_iframe;
+- int align_iframe;
+- int64_t vobu_start_pts;
+-} StreamInfo;
+-
+-typedef struct {
+- int packet_size; /* required packet size */
+- int packet_number;
+- int pack_header_freq; /* frequency (in packets^-1) at which we send pack headers */
+- int system_header_freq;
+- int system_header_size;
+- int mux_rate; /* bitrate in units of 50 bytes/s */
+- /* stream info */
+- int audio_bound;
+- int video_bound;
+- int is_mpeg2;
+- int is_vcd;
+- int is_svcd;
+- int is_dvd;
+- int64_t last_scr; /* current system clock */
+-
+- double vcd_padding_bitrate; //FIXME floats
+- int64_t vcd_padding_bytes_written;
+-
+-} MpegMuxContext;
+-
+-#define PACK_START_CODE ((unsigned int)0x000001ba)
+-#define SYSTEM_HEADER_START_CODE ((unsigned int)0x000001bb)
+-#define SEQUENCE_END_CODE ((unsigned int)0x000001b7)
+-#define PACKET_START_CODE_MASK ((unsigned int)0xffffff00)
+-#define PACKET_START_CODE_PREFIX ((unsigned int)0x00000100)
+-#define ISO_11172_END_CODE ((unsigned int)0x000001b9)
+-
+-/* mpeg2 */
+-#define PROGRAM_STREAM_MAP 0x1bc
+-#define PRIVATE_STREAM_1 0x1bd
+-#define PADDING_STREAM 0x1be
+-#define PRIVATE_STREAM_2 0x1bf
+-
+-
+-#define AUDIO_ID 0xc0
+-#define VIDEO_ID 0xe0
+-#define AC3_ID 0x80
+-#define DTS_ID 0x8a
+-#define LPCM_ID 0xa0
+-#define SUB_ID 0x20
+-
+ #define STREAM_TYPE_VIDEO_MPEG1 0x01
+ #define STREAM_TYPE_VIDEO_MPEG2 0x02
+ #define STREAM_TYPE_AUDIO_MPEG1 0x03
+@@ -108,1156 +43,6 @@
+ #define STREAM_TYPE_AUDIO_AC3 0x81
+ #define STREAM_TYPE_AUDIO_DTS 0x8a
+
+-static const int lpcm_freq_tab[4] = { 48000, 96000, 44100, 32000 };
+-
+-#ifdef CONFIG_MUXERS
+-AVOutputFormat mpeg1system_muxer;
+-AVOutputFormat mpeg1vcd_muxer;
+-AVOutputFormat mpeg2vob_muxer;
+-AVOutputFormat mpeg2svcd_muxer;
+-AVOutputFormat mpeg2dvd_muxer;
+-
+-static int put_pack_header(AVFormatContext *ctx,
+- uint8_t *buf, int64_t timestamp)
+-{
+- MpegMuxContext *s = ctx->priv_data;
+- PutBitContext pb;
+-
+- init_put_bits(&pb, buf, 128);
+-
+- put_bits(&pb, 32, PACK_START_CODE);
+- if (s->is_mpeg2) {
+- put_bits(&pb, 2, 0x1);
+- } else {
+- put_bits(&pb, 4, 0x2);
+- }
+- put_bits(&pb, 3, (uint32_t)((timestamp >> 30) & 0x07));
+- put_bits(&pb, 1, 1);
+- put_bits(&pb, 15, (uint32_t)((timestamp >> 15) & 0x7fff));
+- put_bits(&pb, 1, 1);
+- put_bits(&pb, 15, (uint32_t)((timestamp) & 0x7fff));
+- put_bits(&pb, 1, 1);
+- if (s->is_mpeg2) {
+- /* clock extension */
+- put_bits(&pb, 9, 0);
+- }
+- put_bits(&pb, 1, 1);
+- put_bits(&pb, 22, s->mux_rate);
+- put_bits(&pb, 1, 1);
+- if (s->is_mpeg2) {
+- put_bits(&pb, 1, 1);
+- put_bits(&pb, 5, 0x1f); /* reserved */
+- put_bits(&pb, 3, 0); /* stuffing length */
+- }
+- flush_put_bits(&pb);
+- return pbBufPtr(&pb) - pb.buf;
+-}
+-
+-static int put_system_header(AVFormatContext *ctx, uint8_t *buf,int only_for_stream_id)
+-{
+- MpegMuxContext *s = ctx->priv_data;
+- int size, i, private_stream_coded, id;
+- PutBitContext pb;
+-
+- init_put_bits(&pb, buf, 128);
+-
+- put_bits(&pb, 32, SYSTEM_HEADER_START_CODE);
+- put_bits(&pb, 16, 0);
+- put_bits(&pb, 1, 1);
+-
+- put_bits(&pb, 22, s->mux_rate); /* maximum bit rate of the multiplexed stream */
+- put_bits(&pb, 1, 1); /* marker */
+- if (s->is_vcd && only_for_stream_id==VIDEO_ID) {
+- /* This header applies only to the video stream (see VCD standard p. IV-7)*/
+- put_bits(&pb, 6, 0);
+- } else
+- put_bits(&pb, 6, s->audio_bound);
+-
+- if (s->is_vcd) {
+- /* see VCD standard, p. IV-7*/
+- put_bits(&pb, 1, 0);
+- put_bits(&pb, 1, 1);
+- } else {
+- put_bits(&pb, 1, 0); /* variable bitrate*/
+- put_bits(&pb, 1, 0); /* non constrainted bit stream */
+- }
+-
+- if (s->is_vcd || s->is_dvd) {
+- /* see VCD standard p IV-7 */
+- put_bits(&pb, 1, 1); /* audio locked */
+- put_bits(&pb, 1, 1); /* video locked */
+- } else {
+- put_bits(&pb, 1, 0); /* audio locked */
+- put_bits(&pb, 1, 0); /* video locked */
+- }
+-
+- put_bits(&pb, 1, 1); /* marker */
+-
+- if (s->is_vcd && only_for_stream_id==AUDIO_ID) {
+- /* This header applies only to the audio stream (see VCD standard p. IV-7)*/
+- put_bits(&pb, 5, 0);
+- } else
+- put_bits(&pb, 5, s->video_bound);
+-
+- if (s->is_dvd) {
+- put_bits(&pb, 1, 0); /* packet_rate_restriction_flag */
+- put_bits(&pb, 7, 0x7f); /* reserved byte */
+- } else
+- put_bits(&pb, 8, 0xff); /* reserved byte */
+-
+- /* DVD-Video Stream_bound entries
+- id (0xB9) video, maximum P-STD for stream 0xE0. (P-STD_buffer_bound_scale = 1)
+- id (0xB8) audio, maximum P-STD for any MPEG audio (0xC0 to 0xC7) streams. If there are none set to 4096 (32x128). (P-STD_buffer_bound_scale = 0)
+- id (0xBD) private stream 1 (audio other than MPEG and subpictures). (P-STD_buffer_bound_scale = 1)
+- id (0xBF) private stream 2, NAV packs, set to 2x1024. */
+- if (s->is_dvd) {
+-
+- int P_STD_max_video = 0;
+- int P_STD_max_mpeg_audio = 0;
+- int P_STD_max_mpeg_PS1 = 0;
+-
+- for(i=0;i<ctx->nb_streams;i++) {
+- StreamInfo *stream = ctx->streams[i]->priv_data;
+-
+- id = stream->id;
+- if (id == 0xbd && stream->max_buffer_size > P_STD_max_mpeg_PS1) {
+- P_STD_max_mpeg_PS1 = stream->max_buffer_size;
+- } else if (id >= 0xc0 && id <= 0xc7 && stream->max_buffer_size > P_STD_max_mpeg_audio) {
+- P_STD_max_mpeg_audio = stream->max_buffer_size;
+- } else if (id == 0xe0 && stream->max_buffer_size > P_STD_max_video) {
+- P_STD_max_video = stream->max_buffer_size;
+- }
+- }
+-
+- /* video */
+- put_bits(&pb, 8, 0xb9); /* stream ID */
+- put_bits(&pb, 2, 3);
+- put_bits(&pb, 1, 1);
+- put_bits(&pb, 13, P_STD_max_video / 1024);
+-
+- /* audio */
+- if (P_STD_max_mpeg_audio == 0)
+- P_STD_max_mpeg_audio = 4096;
+- put_bits(&pb, 8, 0xb8); /* stream ID */
+- put_bits(&pb, 2, 3);
+- put_bits(&pb, 1, 0);
+- put_bits(&pb, 13, P_STD_max_mpeg_audio / 128);
+-
+- /* private stream 1 */
+- put_bits(&pb, 8, 0xbd); /* stream ID */
+- put_bits(&pb, 2, 3);
+- put_bits(&pb, 1, 0);
+- put_bits(&pb, 13, P_STD_max_mpeg_PS1 / 128);
+-
+- /* private stream 2 */
+- put_bits(&pb, 8, 0xbf); /* stream ID */
+- put_bits(&pb, 2, 3);
+- put_bits(&pb, 1, 1);
+- put_bits(&pb, 13, 2);
+- }
+- else {
+- /* audio stream info */
+- private_stream_coded = 0;
+- for(i=0;i<ctx->nb_streams;i++) {
+- StreamInfo *stream = ctx->streams[i]->priv_data;
+-
+-
+- /* For VCDs, only include the stream info for the stream
+- that the pack which contains this system belongs to.
+- (see VCD standard p. IV-7) */
+- if ( !s->is_vcd || stream->id==only_for_stream_id
+- || only_for_stream_id==0) {
+-
+- id = stream->id;
+- if (id < 0xc0) {
+- /* special case for private streams (AC3 use that) */
+- if (private_stream_coded)
+- continue;
+- private_stream_coded = 1;
+- id = 0xbd;
+- }
+- put_bits(&pb, 8, id); /* stream ID */
+- put_bits(&pb, 2, 3);
+- if (id < 0xe0) {
+- /* audio */
+- put_bits(&pb, 1, 0);
+- put_bits(&pb, 13, stream->max_buffer_size / 128);
+- } else {
+- /* video */
+- put_bits(&pb, 1, 1);
+- put_bits(&pb, 13, stream->max_buffer_size / 1024);
+- }
+- }
+- }
+- }
+-
+- flush_put_bits(&pb);
+- size = pbBufPtr(&pb) - pb.buf;
+- /* patch packet size */
+- buf[4] = (size - 6) >> 8;
+- buf[5] = (size - 6) & 0xff;
+-
+- return size;
+-}
+-
+-static int get_system_header_size(AVFormatContext *ctx)
+-{
+- int buf_index, i, private_stream_coded;
+- StreamInfo *stream;
+- MpegMuxContext *s = ctx->priv_data;
+-
+- if (s->is_dvd)
+- return 18; // DVD-Video system headers are 18 bytes fixed length.
+-
+- buf_index = 12;
+- private_stream_coded = 0;
+- for(i=0;i<ctx->nb_streams;i++) {
+- stream = ctx->streams[i]->priv_data;
+- if (stream->id < 0xc0) {
+- if (private_stream_coded)
+- continue;
+- private_stream_coded = 1;
+- }
+- buf_index += 3;
+- }
+- return buf_index;
+-}
+-
+-static int mpeg_mux_init(AVFormatContext *ctx)
+-{
+- MpegMuxContext *s = ctx->priv_data;
+- int bitrate, i, mpa_id, mpv_id, mps_id, ac3_id, dts_id, lpcm_id, j;
+- AVStream *st;
+- StreamInfo *stream;
+- int audio_bitrate;
+- int video_bitrate;
+-
+- s->packet_number = 0;
+- s->is_vcd = (ctx->oformat == &mpeg1vcd_muxer);
+- s->is_svcd = (ctx->oformat == &mpeg2svcd_muxer);
+- s->is_mpeg2 = (ctx->oformat == &mpeg2vob_muxer || ctx->oformat == &mpeg2svcd_muxer || ctx->oformat == &mpeg2dvd_muxer);
+- s->is_dvd = (ctx->oformat == &mpeg2dvd_muxer);
+-
+- if(ctx->packet_size)
+- s->packet_size = ctx->packet_size;
+- else
+- s->packet_size = 2048;
+-
+- s->vcd_padding_bytes_written = 0;
+- s->vcd_padding_bitrate=0;
+-
+- s->audio_bound = 0;
+- s->video_bound = 0;
+- mpa_id = AUDIO_ID;
+- ac3_id = AC3_ID;
+- dts_id = DTS_ID;
+- mpv_id = VIDEO_ID;
+- mps_id = SUB_ID;
+- lpcm_id = LPCM_ID;
+- for(i=0;i<ctx->nb_streams;i++) {
+- st = ctx->streams[i];
+- stream = av_mallocz(sizeof(StreamInfo));
+- if (!stream)
+- goto fail;
+- st->priv_data = stream;
+-
+- av_set_pts_info(st, 64, 1, 90000);
+-
+- switch(st->codec->codec_type) {
+- case CODEC_TYPE_AUDIO:
+- if (st->codec->codec_id == CODEC_ID_AC3) {
+- stream->id = ac3_id++;
+- } else if (st->codec->codec_id == CODEC_ID_DTS) {
+- stream->id = dts_id++;
+- } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
+- stream->id = lpcm_id++;
+- for(j = 0; j < 4; j++) {
+- if (lpcm_freq_tab[j] == st->codec->sample_rate)
+- break;
+- }
+- if (j == 4)
+- goto fail;
+- if (st->codec->channels > 8)
+- return -1;
+- stream->lpcm_header[0] = 0x0c;
+- stream->lpcm_header[1] = (st->codec->channels - 1) | (j << 4);
+- stream->lpcm_header[2] = 0x80;
+- stream->lpcm_align = st->codec->channels * 2;
+- } else {
+- stream->id = mpa_id++;
+- }
+-
+- /* This value HAS to be used for VCD (see VCD standard, p. IV-7).
+- Right now it is also used for everything else.*/
+- stream->max_buffer_size = 4 * 1024;
+- s->audio_bound++;
+- break;
+- case CODEC_TYPE_VIDEO:
+- stream->id = mpv_id++;
+- if (st->codec->rc_buffer_size)
+- stream->max_buffer_size = 6*1024 + st->codec->rc_buffer_size/8;
+- else
+- stream->max_buffer_size = 230*1024; //FIXME this is probably too small as default
+-#if 0
+- /* see VCD standard, p. IV-7*/
+- stream->max_buffer_size = 46 * 1024;
+- else
+- /* This value HAS to be used for SVCD (see SVCD standard, p. 26 V.2.3.2).
+- Right now it is also used for everything else.*/
+- stream->max_buffer_size = 230 * 1024;
+-#endif
+- s->video_bound++;
+- break;
+- case CODEC_TYPE_SUBTITLE:
+- stream->id = mps_id++;
+- stream->max_buffer_size = 16 * 1024;
+- break;
+- default:
+- return -1;
+- }
+- av_fifo_init(&stream->fifo, 16);
+- }
+- bitrate = 0;
+- audio_bitrate = 0;
+- video_bitrate = 0;
+- for(i=0;i<ctx->nb_streams;i++) {
+- int codec_rate;
+- st = ctx->streams[i];
+- stream = (StreamInfo*) st->priv_data;
+-
+- if(st->codec->rc_max_rate || stream->id==VIDEO_ID)
+- codec_rate= st->codec->rc_max_rate;
+- else
+- codec_rate= st->codec->bit_rate;
+-
+- if(!codec_rate)
+- codec_rate= (1<<21)*8*50/ctx->nb_streams;
+-
+- bitrate += codec_rate;
+-
+- if (stream->id==AUDIO_ID)
+- audio_bitrate += codec_rate;
+- else if (stream->id==VIDEO_ID)
+- video_bitrate += codec_rate;
+- }
+-
+- if(ctx->mux_rate){
+- s->mux_rate= (ctx->mux_rate + (8 * 50) - 1) / (8 * 50);
+- } else {
+- /* we increase slightly the bitrate to take into account the
+- headers. XXX: compute it exactly */
+- bitrate += bitrate*5/100;
+- bitrate += 10000;
+- s->mux_rate = (bitrate + (8 * 50) - 1) / (8 * 50);
+- }
+-
+- if (s->is_vcd) {
+- double overhead_rate;
+-
+- /* The VCD standard mandates that the mux_rate field is 3528
+- (see standard p. IV-6).
+- The value is actually "wrong", i.e. if you calculate
+- it using the normal formula and the 75 sectors per second transfer
+- rate you get a different value because the real pack size is 2324,
+- not 2352. But the standard explicitly specifies that the mux_rate
+- field in the header must have this value.*/
+-// s->mux_rate=2352 * 75 / 50; /* = 3528*/
+-
+- /* The VCD standard states that the muxed stream must be
+- exactly 75 packs / second (the data rate of a single speed cdrom).
+- Since the video bitrate (probably 1150000 bits/sec) will be below
+- the theoretical maximum we have to add some padding packets
+- to make up for the lower data rate.
+- (cf. VCD standard p. IV-6 )*/
+-
+- /* Add the header overhead to the data rate.
+- 2279 data bytes per audio pack, 2294 data bytes per video pack*/
+- overhead_rate = ((audio_bitrate / 8.0) / 2279) * (2324 - 2279);
+- overhead_rate += ((video_bitrate / 8.0) / 2294) * (2324 - 2294);
+- overhead_rate *= 8;
+-
+- /* Add padding so that the full bitrate is 2324*75 bytes/sec */
+- s->vcd_padding_bitrate = 2324 * 75 * 8 - (bitrate + overhead_rate);
+- }
+-
+- if (s->is_vcd || s->is_mpeg2)
+- /* every packet */
+- s->pack_header_freq = 1;
+- else
+- /* every 2 seconds */
+- s->pack_header_freq = 2 * bitrate / s->packet_size / 8;
+-
+- /* the above seems to make pack_header_freq zero sometimes */
+- if (s->pack_header_freq == 0)
+- s->pack_header_freq = 1;
+-
+- if (s->is_mpeg2)
+- /* every 200 packets. Need to look at the spec. */
+- s->system_header_freq = s->pack_header_freq * 40;
+- else if (s->is_vcd)
+- /* the standard mandates that there are only two system headers
+- in the whole file: one in the first packet of each stream.
+- (see standard p. IV-7 and IV-8) */
+- s->system_header_freq = 0x7fffffff;
+- else
+- s->system_header_freq = s->pack_header_freq * 5;
+-
+- for(i=0;i<ctx->nb_streams;i++) {
+- stream = ctx->streams[i]->priv_data;
+- stream->packet_number = 0;
+- }
+- s->system_header_size = get_system_header_size(ctx);
+- s->last_scr = 0;
+- return 0;
+- fail:
+- for(i=0;i<ctx->nb_streams;i++) {
+- av_free(ctx->streams[i]->priv_data);
+- }
+- return AVERROR(ENOMEM);
+-}
+-
+-static inline void put_timestamp(ByteIOContext *pb, int id, int64_t timestamp)
+-{
+- put_byte(pb,
+- (id << 4) |
+- (((timestamp >> 30) & 0x07) << 1) |
+- 1);
+- put_be16(pb, (uint16_t)((((timestamp >> 15) & 0x7fff) << 1) | 1));
+- put_be16(pb, (uint16_t)((((timestamp) & 0x7fff) << 1) | 1));
+-}
+-
+-
+-/* return the number of padding bytes that should be inserted into
+- the multiplexed stream.*/
+-static int get_vcd_padding_size(AVFormatContext *ctx, int64_t pts)
+-{
+- MpegMuxContext *s = ctx->priv_data;
+- int pad_bytes = 0;
+-
+- if (s->vcd_padding_bitrate > 0 && pts!=AV_NOPTS_VALUE)
+- {
+- int64_t full_pad_bytes;
+-
+- full_pad_bytes = (int64_t)((s->vcd_padding_bitrate * (pts / 90000.0)) / 8.0); //FIXME this is wrong
+- pad_bytes = (int) (full_pad_bytes - s->vcd_padding_bytes_written);
+-
+- if (pad_bytes<0)
+- /* might happen if we have already padded to a later timestamp. This
+- can occur if another stream has already advanced further.*/
+- pad_bytes=0;
+- }
+-
+- return pad_bytes;
+-}
+-
+-
+-#if 0 /* unused, remove? */
+-/* return the exact available payload size for the next packet for
+- stream 'stream_index'. 'pts' and 'dts' are only used to know if
+- timestamps are needed in the packet header. */
+-static int get_packet_payload_size(AVFormatContext *ctx, int stream_index,
+- int64_t pts, int64_t dts)
+-{
+- MpegMuxContext *s = ctx->priv_data;
+- int buf_index;
+- StreamInfo *stream;
+-
+- stream = ctx->streams[stream_index]->priv_data;
+-
+- buf_index = 0;
+- if (((s->packet_number % s->pack_header_freq) == 0)) {
+- /* pack header size */
+- if (s->is_mpeg2)
+- buf_index += 14;
+- else
+- buf_index += 12;
+-
+- if (s->is_vcd) {
+- /* there is exactly one system header for each stream in a VCD MPEG,
+- One in the very first video packet and one in the very first
+- audio packet (see VCD standard p. IV-7 and IV-8).*/
+-
+- if (stream->packet_number==0)
+- /* The system headers refer only to the stream they occur in,
+- so they have a constant size.*/
+- buf_index += 15;
+-
+- } else {
+- if ((s->packet_number % s->system_header_freq) == 0)
+- buf_index += s->system_header_size;
+- }
+- }
+-
+- if ((s->is_vcd && stream->packet_number==0)
+- || (s->is_svcd && s->packet_number==0))
+- /* the first pack of each stream contains only the pack header,
+- the system header and some padding (see VCD standard p. IV-6)
+- Add the padding size, so that the actual payload becomes 0.*/
+- buf_index += s->packet_size - buf_index;
+- else {
+- /* packet header size */
+- buf_index += 6;
+- if (s->is_mpeg2) {
+- buf_index += 3;
+- if (stream->packet_number==0)
+- buf_index += 3; /* PES extension */
+- buf_index += 1; /* obligatory stuffing byte */
+- }
+- if (pts != AV_NOPTS_VALUE) {
+- if (dts != pts)
+- buf_index += 5 + 5;
+- else
+- buf_index += 5;
+-
+- } else {
+- if (!s->is_mpeg2)
+- buf_index++;
+- }
+-
+- if (stream->id < 0xc0) {
+- /* AC3/LPCM private data header */
+- buf_index += 4;
+- if (stream->id >= 0xa0) {
+- int n;
+- buf_index += 3;
+- /* NOTE: we round the payload size to an integer number of
+- LPCM samples */
+- n = (s->packet_size - buf_index) % stream->lpcm_align;
+- if (n)
+- buf_index += (stream->lpcm_align - n);
+- }
+- }
+-
+- if (s->is_vcd && stream->id == AUDIO_ID)
+- /* The VCD standard demands that 20 zero bytes follow
+- each audio packet (see standard p. IV-8).*/
+- buf_index+=20;
+- }
+- return s->packet_size - buf_index;
+-}
+-#endif
+-
+-/* Write an MPEG padding packet header. */
+-static void put_padding_packet(AVFormatContext *ctx, ByteIOContext *pb,int packet_bytes)
+-{
+- MpegMuxContext *s = ctx->priv_data;
+- int i;
+-
+- put_be32(pb, PADDING_STREAM);
+- put_be16(pb, packet_bytes - 6);
+- if (!s->is_mpeg2) {
+- put_byte(pb, 0x0f);
+- packet_bytes -= 7;
+- } else
+- packet_bytes -= 6;
+-
+- for(i=0;i<packet_bytes;i++)
+- put_byte(pb, 0xff);
+-}
+-
+-static int get_nb_frames(AVFormatContext *ctx, StreamInfo *stream, int len){
+- int nb_frames=0;
+- PacketDesc *pkt_desc= stream->premux_packet;
+-
+- while(len>0){
+- if(pkt_desc->size == pkt_desc->unwritten_size)
+- nb_frames++;
+- len -= pkt_desc->unwritten_size;
+- pkt_desc= pkt_desc->next;
+- }
+-
+- return nb_frames;
+-}
+-
+-/* flush the packet on stream stream_index */
+-static int flush_packet(AVFormatContext *ctx, int stream_index,
+- int64_t pts, int64_t dts, int64_t scr, int trailer_size)
+-{
+- MpegMuxContext *s = ctx->priv_data;
+- StreamInfo *stream = ctx->streams[stream_index]->priv_data;
+- uint8_t *buf_ptr;
+- int size, payload_size, startcode, id, stuffing_size, i, header_len;
+- int packet_size;
+- uint8_t buffer[128];
+- int zero_trail_bytes = 0;
+- int pad_packet_bytes = 0;
+- int pes_flags;
+- int general_pack = 0; /*"general" pack without data specific to one stream?*/
+- int nb_frames;
+-
+- id = stream->id;
+-
+-#if 0
+- printf("packet ID=%2x PTS=%0.3f\n",
+- id, pts / 90000.0);
+-#endif
+-
+- buf_ptr = buffer;
+-
+- if ((s->packet_number % s->pack_header_freq) == 0 || s->last_scr != scr) {
+- /* output pack and systems header if needed */
+- size = put_pack_header(ctx, buf_ptr, scr);
+- buf_ptr += size;
+- s->last_scr= scr;
+-
+- if (s->is_vcd) {
+- /* there is exactly one system header for each stream in a VCD MPEG,
+- One in the very first video packet and one in the very first
+- audio packet (see VCD standard p. IV-7 and IV-8).*/
+-
+- if (stream->packet_number==0) {
+- size = put_system_header(ctx, buf_ptr, id);
+- buf_ptr += size;
+- }
+- } else if (s->is_dvd) {
+- if (stream->align_iframe || s->packet_number == 0){
+- int PES_bytes_to_fill = s->packet_size - size - 10;
+-
+- if (pts != AV_NOPTS_VALUE) {
+- if (dts != pts)
+- PES_bytes_to_fill -= 5 + 5;
+- else
+- PES_bytes_to_fill -= 5;
+- }
+-
+- if (stream->bytes_to_iframe == 0 || s->packet_number == 0) {
+- size = put_system_header(ctx, buf_ptr, 0);
+- buf_ptr += size;
+- size = buf_ptr - buffer;
+- put_buffer(&ctx->pb, buffer, size);
+-
+- put_be32(&ctx->pb, PRIVATE_STREAM_2);
+- put_be16(&ctx->pb, 0x03d4); // length
+- put_byte(&ctx->pb, 0x00); // substream ID, 00=PCI
+- for (i = 0; i < 979; i++)
+- put_byte(&ctx->pb, 0x00);
+-
+- put_be32(&ctx->pb, PRIVATE_STREAM_2);
+- put_be16(&ctx->pb, 0x03fa); // length
+- put_byte(&ctx->pb, 0x01); // substream ID, 01=DSI
+- for (i = 0; i < 1017; i++)
+- put_byte(&ctx->pb, 0x00);
+-
+- memset(buffer, 0, 128);
+- buf_ptr = buffer;
+- s->packet_number++;
+- stream->align_iframe = 0;
+- scr += s->packet_size*90000LL / (s->mux_rate*50LL); //FIXME rounding and first few bytes of each packet
+- size = put_pack_header(ctx, buf_ptr, scr);
+- s->last_scr= scr;
+- buf_ptr += size;
+- /* GOP Start */
+- } else if (stream->bytes_to_iframe < PES_bytes_to_fill) {
+- pad_packet_bytes = PES_bytes_to_fill - stream->bytes_to_iframe;
+- }
+- }
+- } else {
+- if ((s->packet_number % s->system_header_freq) == 0) {
+- size = put_system_header(ctx, buf_ptr, 0);
+- buf_ptr += size;
+- }
+- }
+- }
+- size = buf_ptr - buffer;
+- put_buffer(&ctx->pb, buffer, size);
+-
+- packet_size = s->packet_size - size;
+-
+- if (s->is_vcd && id == AUDIO_ID)
+- /* The VCD standard demands that 20 zero bytes follow
+- each audio pack (see standard p. IV-8).*/
+- zero_trail_bytes += 20;
+-
+- if ((s->is_vcd && stream->packet_number==0)
+- || (s->is_svcd && s->packet_number==0)) {
+- /* for VCD the first pack of each stream contains only the pack header,
+- the system header and lots of padding (see VCD standard p. IV-6).
+- In the case of an audio pack, 20 zero bytes are also added at
+- the end.*/
+- /* For SVCD we fill the very first pack to increase compatibility with
+- some DVD players. Not mandated by the standard.*/
+- if (s->is_svcd)
+- general_pack = 1; /* the system header refers to both streams and no stream data*/
+- pad_packet_bytes = packet_size - zero_trail_bytes;
+- }
+-
+- packet_size -= pad_packet_bytes + zero_trail_bytes;
+-
+- if (packet_size > 0) {
+-
+- /* packet header size */
+- packet_size -= 6;
+-
+- /* packet header */
+- if (s->is_mpeg2) {
+- header_len = 3;
+- if (stream->packet_number==0)
+- header_len += 3; /* PES extension */
+- header_len += 1; /* obligatory stuffing byte */
+- } else {
+- header_len = 0;
+- }
+- if (pts != AV_NOPTS_VALUE) {
+- if (dts != pts)
+- header_len += 5 + 5;
+- else
+- header_len += 5;
+- } else {
+- if (!s->is_mpeg2)
+- header_len++;
+- }
+-
+- payload_size = packet_size - header_len;
+- if (id < 0xc0) {
+- startcode = PRIVATE_STREAM_1;
+- payload_size -= 1;
+- if (id >= 0x40) {
+- payload_size -= 3;
+- if (id >= 0xa0)
+- payload_size -= 3;
+- }
+- } else {
+- startcode = 0x100 + id;
+- }
+-
+- stuffing_size = payload_size - av_fifo_size(&stream->fifo);
+-
+- // first byte does not fit -> reset pts/dts + stuffing
+- if(payload_size <= trailer_size && pts != AV_NOPTS_VALUE){
+- int timestamp_len=0;
+- if(dts != pts)
+- timestamp_len += 5;
+- if(pts != AV_NOPTS_VALUE)
+- timestamp_len += s->is_mpeg2 ? 5 : 4;
+- pts=dts= AV_NOPTS_VALUE;
+- header_len -= timestamp_len;
+- if (s->is_dvd && stream->align_iframe) {
+- pad_packet_bytes += timestamp_len;
+- packet_size -= timestamp_len;
+- } else {
+- payload_size += timestamp_len;
+- }
+- stuffing_size += timestamp_len;
+- if(payload_size > trailer_size)
+- stuffing_size += payload_size - trailer_size;
+- }
+-
+- if (pad_packet_bytes > 0 && pad_packet_bytes <= 7) { // can't use padding, so use stuffing
+- packet_size += pad_packet_bytes;
+- payload_size += pad_packet_bytes; // undo the previous adjustment
+- if (stuffing_size < 0) {
+- stuffing_size = pad_packet_bytes;
+- } else {
+- stuffing_size += pad_packet_bytes;
+- }
+- pad_packet_bytes = 0;
+- }
+-
+- if (stuffing_size < 0)
+- stuffing_size = 0;
+- if (stuffing_size > 16) { /*<=16 for MPEG-1, <=32 for MPEG-2*/
+- pad_packet_bytes += stuffing_size;
+- packet_size -= stuffing_size;
+- payload_size -= stuffing_size;
+- stuffing_size = 0;
+- }
+-
+- nb_frames= get_nb_frames(ctx, stream, payload_size - stuffing_size);
+-
+- put_be32(&ctx->pb, startcode);
+-
+- put_be16(&ctx->pb, packet_size);
+-
+- if (!s->is_mpeg2)
+- for(i=0;i<stuffing_size;i++)
+- put_byte(&ctx->pb, 0xff);
+-
+- if (s->is_mpeg2) {
+- put_byte(&ctx->pb, 0x80); /* mpeg2 id */
+-
+- pes_flags=0;
+-
+- if (pts != AV_NOPTS_VALUE) {
+- pes_flags |= 0x80;
+- if (dts != pts)
+- pes_flags |= 0x40;
+- }
+-
+- /* Both the MPEG-2 and the SVCD standards demand that the
+- P-STD_buffer_size field be included in the first packet of
+- every stream. (see SVCD standard p. 26 V.2.3.1 and V.2.3.2
+- and MPEG-2 standard 2.7.7) */
+- if (stream->packet_number == 0)
+- pes_flags |= 0x01;
+-
+- put_byte(&ctx->pb, pes_flags); /* flags */
+- put_byte(&ctx->pb, header_len - 3 + stuffing_size);
+-
+- if (pes_flags & 0x80) /*write pts*/
+- put_timestamp(&ctx->pb, (pes_flags & 0x40) ? 0x03 : 0x02, pts);
+- if (pes_flags & 0x40) /*write dts*/
+- put_timestamp(&ctx->pb, 0x01, dts);
+-
+- if (pes_flags & 0x01) { /*write pes extension*/
+- put_byte(&ctx->pb, 0x10); /* flags */
+-
+- /* P-STD buffer info */
+- if (id == AUDIO_ID)
+- put_be16(&ctx->pb, 0x4000 | stream->max_buffer_size/128);
+- else
+- put_be16(&ctx->pb, 0x6000 | stream->max_buffer_size/1024);
+- }
+-
+- } else {
+- if (pts != AV_NOPTS_VALUE) {
+- if (dts != pts) {
+- put_timestamp(&ctx->pb, 0x03, pts);
+- put_timestamp(&ctx->pb, 0x01, dts);
+- } else {
+- put_timestamp(&ctx->pb, 0x02, pts);
+- }
+- } else {
+- put_byte(&ctx->pb, 0x0f);
+- }
+- }
+-
+- if (s->is_mpeg2) {
+- /* special stuffing byte that is always written
+- to prevent accidental generation of start codes. */
+- put_byte(&ctx->pb, 0xff);
+-
+- for(i=0;i<stuffing_size;i++)
+- put_byte(&ctx->pb, 0xff);
+- }
+-
+- if (startcode == PRIVATE_STREAM_1) {
+- put_byte(&ctx->pb, id);
+- if (id >= 0xa0) {
+- /* LPCM (XXX: check nb_frames) */
+- put_byte(&ctx->pb, 7);
+- put_be16(&ctx->pb, 4); /* skip 3 header bytes */
+- put_byte(&ctx->pb, stream->lpcm_header[0]);
+- put_byte(&ctx->pb, stream->lpcm_header[1]);
+- put_byte(&ctx->pb, stream->lpcm_header[2]);
+- } else if (id >= 0x40) {
+- /* AC3 */
+- put_byte(&ctx->pb, nb_frames);
+- put_be16(&ctx->pb, trailer_size+1);
+- }
+- }
+-
+- /* output data */
+- if(av_fifo_generic_read(&stream->fifo, payload_size - stuffing_size, &put_buffer, &ctx->pb) < 0)
+- return -1;
+- stream->bytes_to_iframe -= payload_size - stuffing_size;
+- }else{
+- payload_size=
+- stuffing_size= 0;
+- }
+-
+- if (pad_packet_bytes > 0)
+- put_padding_packet(ctx,&ctx->pb, pad_packet_bytes);
+-
+- for(i=0;i<zero_trail_bytes;i++)
+- put_byte(&ctx->pb, 0x00);
+-
+- put_flush_packet(&ctx->pb);
+-
+- s->packet_number++;
+-
+- /* only increase the stream packet number if this pack actually contains
+- something that is specific to this stream! I.e. a dedicated header
+- or some data.*/
+- if (!general_pack)
+- stream->packet_number++;
+-
+- return payload_size - stuffing_size;
+-}
+-
+-static void put_vcd_padding_sector(AVFormatContext *ctx)
+-{
+- /* There are two ways to do this padding: writing a sector/pack
+- of 0 values, or writing an MPEG padding pack. Both seem to
+- work with most decoders, BUT the VCD standard only allows a 0-sector
+- (see standard p. IV-4, IV-5).
+- So a 0-sector it is...*/
+-
+- MpegMuxContext *s = ctx->priv_data;
+- int i;
+-
+- for(i=0;i<s->packet_size;i++)
+- put_byte(&ctx->pb, 0);
+-
+- s->vcd_padding_bytes_written += s->packet_size;
+-
+- put_flush_packet(&ctx->pb);
+-
+- /* increasing the packet number is correct. The SCR of the following packs
+- is calculated from the packet_number and it has to include the padding
+- sector (it represents the sector index, not the MPEG pack index)
+- (see VCD standard p. IV-6)*/
+- s->packet_number++;
+-}
+-
+-#if 0 /* unused, remove? */
+-static int64_t get_vcd_scr(AVFormatContext *ctx,int stream_index,int64_t pts)
+-{
+- MpegMuxContext *s = ctx->priv_data;
+- int64_t scr;
+-
+- /* Since the data delivery rate is constant, SCR is computed
+- using the formula C + i * 1200 where C is the start constant
+- and i is the pack index.
+- It is recommended that SCR 0 is at the beginning of the VCD front
+- margin (a sequence of empty Form 2 sectors on the CD).
+- It is recommended that the front margin is 30 sectors long, so
+- we use C = 30*1200 = 36000
+- (Note that even if the front margin is not 30 sectors the file
+- will still be correct according to the standard. It just won't have
+- the "recommended" value).*/
+- scr = 36000 + s->packet_number * 1200;
+-
+- return scr;
+-}
+-#endif
+-
+-static int remove_decoded_packets(AVFormatContext *ctx, int64_t scr){
+-// MpegMuxContext *s = ctx->priv_data;
+- int i;
+-
+- for(i=0; i<ctx->nb_streams; i++){
+- AVStream *st = ctx->streams[i];
+- StreamInfo *stream = st->priv_data;
+- PacketDesc *pkt_desc;
+-
+- while((pkt_desc= stream->predecode_packet)
+- && scr > pkt_desc->dts){ //FIXME > vs >=
+- if(stream->buffer_index < pkt_desc->size ||
+- stream->predecode_packet == stream->premux_packet){
+- av_log(ctx, AV_LOG_ERROR,
+- "buffer underflow i=%d bufi=%d size=%d\n",
+- i, stream->buffer_index, pkt_desc->size);
+- break;
+- }
+- stream->buffer_index -= pkt_desc->size;
+-
+- stream->predecode_packet= pkt_desc->next;
+- av_freep(&pkt_desc);
+- }
+- }
+-
+- return 0;
+-}
+-
+-static int output_packet(AVFormatContext *ctx, int flush){
+- MpegMuxContext *s = ctx->priv_data;
+- AVStream *st;
+- StreamInfo *stream;
+- int i, avail_space, es_size, trailer_size;
+- int best_i= -1;
+- int best_score= INT_MIN;
+- int ignore_constraints=0;
+- int64_t scr= s->last_scr;
+- PacketDesc *timestamp_packet;
+- const int64_t max_delay= av_rescale(ctx->max_delay, 90000, AV_TIME_BASE);
+-
+-retry:
+- for(i=0; i<ctx->nb_streams; i++){
+- AVStream *st = ctx->streams[i];
+- StreamInfo *stream = st->priv_data;
+- const int avail_data= av_fifo_size(&stream->fifo);
+- const int space= stream->max_buffer_size - stream->buffer_index;
+- int rel_space= 1024*space / stream->max_buffer_size;
+- PacketDesc *next_pkt= stream->premux_packet;
+-
+- /* for subtitle, a single PES packet must be generated,
+- so we flush after every single subtitle packet */
+- if(s->packet_size > avail_data && !flush
+- && st->codec->codec_type != CODEC_TYPE_SUBTITLE)
+- return 0;
+- if(avail_data==0)
+- continue;
+- assert(avail_data>0);
+-
+- if(space < s->packet_size && !ignore_constraints)
+- continue;
+-
+- if(next_pkt && next_pkt->dts - scr > max_delay)
+- continue;
+-
+- if(rel_space > best_score){
+- best_score= rel_space;
+- best_i = i;
+- avail_space= space;
+- }
+- }
+-
+- if(best_i < 0){
+- int64_t best_dts= INT64_MAX;
+-
+- for(i=0; i<ctx->nb_streams; i++){
+- AVStream *st = ctx->streams[i];
+- StreamInfo *stream = st->priv_data;
+- PacketDesc *pkt_desc= stream->predecode_packet;
+- if(pkt_desc && pkt_desc->dts < best_dts)
+- best_dts= pkt_desc->dts;
+- }
+-
+-#if 0
+- av_log(ctx, AV_LOG_DEBUG, "bumping scr, scr:%f, dts:%f\n",
+- scr/90000.0, best_dts/90000.0);
+-#endif
+- if(best_dts == INT64_MAX)
+- return 0;
+-
+- if(scr >= best_dts+1 && !ignore_constraints){
+- av_log(ctx, AV_LOG_ERROR, "packet too large, ignoring buffer limits to mux it\n");
+- ignore_constraints= 1;
+- }
+- scr= FFMAX(best_dts+1, scr);
+- if(remove_decoded_packets(ctx, scr) < 0)
+- return -1;
+- goto retry;
+- }
+-
+- assert(best_i >= 0);
+-
+- st = ctx->streams[best_i];
+- stream = st->priv_data;
+-
+- assert(av_fifo_size(&stream->fifo) > 0);
+-
+- assert(avail_space >= s->packet_size || ignore_constraints);
+-
+- timestamp_packet= stream->premux_packet;
+- if(timestamp_packet->unwritten_size == timestamp_packet->size){
+- trailer_size= 0;
+- }else{
+- trailer_size= timestamp_packet->unwritten_size;
+- timestamp_packet= timestamp_packet->next;
+- }
+-
+- if(timestamp_packet){
+-//av_log(ctx, AV_LOG_DEBUG, "dts:%f pts:%f scr:%f stream:%d\n", timestamp_packet->dts/90000.0, timestamp_packet->pts/90000.0, scr/90000.0, best_i);
+- es_size= flush_packet(ctx, best_i, timestamp_packet->pts, timestamp_packet->dts, scr, trailer_size);
+- }else{
+- assert(av_fifo_size(&stream->fifo) == trailer_size);
+- es_size= flush_packet(ctx, best_i, AV_NOPTS_VALUE, AV_NOPTS_VALUE, scr, trailer_size);
+- }
+-
+- if (s->is_vcd) {
+- /* Write one or more padding sectors, if necessary, to reach
+- the constant overall bitrate.*/
+- int vcd_pad_bytes;
+-
+- while((vcd_pad_bytes = get_vcd_padding_size(ctx,stream->premux_packet->pts) ) >= s->packet_size){ //FIXME pts cannot be correct here
+- put_vcd_padding_sector(ctx);
+- s->last_scr += s->packet_size*90000LL / (s->mux_rate*50LL); //FIXME rounding and first few bytes of each packet
+- }
+- }
+-
+- stream->buffer_index += es_size;
+- s->last_scr += s->packet_size*90000LL / (s->mux_rate*50LL); //FIXME rounding and first few bytes of each packet
+-
+- while(stream->premux_packet && stream->premux_packet->unwritten_size <= es_size){
+- es_size -= stream->premux_packet->unwritten_size;
+- stream->premux_packet= stream->premux_packet->next;
+- }
+- if(es_size)
+- stream->premux_packet->unwritten_size -= es_size;
+-
+- if(remove_decoded_packets(ctx, s->last_scr) < 0)
+- return -1;
+-
+- return 1;
+-}
+-
+-static int mpeg_mux_write_packet(AVFormatContext *ctx, AVPacket *pkt)
+-{
+- MpegMuxContext *s = ctx->priv_data;
+- int stream_index= pkt->stream_index;
+- int size= pkt->size;
+- uint8_t *buf= pkt->data;
+- AVStream *st = ctx->streams[stream_index];
+- StreamInfo *stream = st->priv_data;
+- int64_t pts, dts;
+- PacketDesc *pkt_desc;
+- const int preload= av_rescale(ctx->preload, 90000, AV_TIME_BASE);
+- const int is_iframe = st->codec->codec_type == CODEC_TYPE_VIDEO && (pkt->flags & PKT_FLAG_KEY);
+-
+- pts= pkt->pts;
+- dts= pkt->dts;
+-
+- if(pts != AV_NOPTS_VALUE) pts += preload;
+- if(dts != AV_NOPTS_VALUE) dts += preload;
+-
+-//av_log(ctx, AV_LOG_DEBUG, "dts:%f pts:%f flags:%d stream:%d nopts:%d\n", dts/90000.0, pts/90000.0, pkt->flags, pkt->stream_index, pts != AV_NOPTS_VALUE);
+- if (!stream->premux_packet)
+- stream->next_packet = &stream->premux_packet;
+- *stream->next_packet=
+- pkt_desc= av_mallocz(sizeof(PacketDesc));
+- pkt_desc->pts= pts;
+- pkt_desc->dts= dts;
+- pkt_desc->unwritten_size=
+- pkt_desc->size= size;
+- if(!stream->predecode_packet)
+- stream->predecode_packet= pkt_desc;
+- stream->next_packet= &pkt_desc->next;
+-
+- av_fifo_realloc(&stream->fifo, av_fifo_size(&stream->fifo) + size + 1);
+-
+- if (s->is_dvd){
+- if (is_iframe && (s->packet_number == 0 || (pts - stream->vobu_start_pts >= 36000))) { // min VOBU length 0.4 seconds (mpucoder)
+- stream->bytes_to_iframe = av_fifo_size(&stream->fifo);
+- stream->align_iframe = 1;
+- stream->vobu_start_pts = pts;
+- } else {
+- stream->align_iframe = 0;
+- }
+- }
+-
+- av_fifo_write(&stream->fifo, buf, size);
+-
+- for(;;){
+- int ret= output_packet(ctx, 0);
+- if(ret<=0)
+- return ret;
+- }
+-}
+-
+-static int mpeg_mux_end(AVFormatContext *ctx)
+-{
+-// MpegMuxContext *s = ctx->priv_data;
+- StreamInfo *stream;
+- int i;
+-
+- for(;;){
+- int ret= output_packet(ctx, 1);
+- if(ret<0)
+- return ret;
+- else if(ret==0)
+- break;
+- }
+-
+- /* End header according to MPEG1 systems standard. We do not write
+- it as it is usually not needed by decoders and because it
+- complicates MPEG stream concatenation. */
+- //put_be32(&ctx->pb, ISO_11172_END_CODE);
+- //put_flush_packet(&ctx->pb);
+-
+- for(i=0;i<ctx->nb_streams;i++) {
+- stream = ctx->streams[i]->priv_data;
+-
+- assert(av_fifo_size(&stream->fifo) == 0);
+- av_fifo_free(&stream->fifo);
+- }
+- return 0;
+-}
+-#endif //CONFIG_MUXERS
+-
+-/*********************************************/
+-/* demux code */
+-
+ #define MAX_SYNC_SIZE 100000
+
+ static int cdxa_probe(AVProbeData *p)
+@@ -1763,81 +548,7 @@
+ return dts;
+ }
+
+-#ifdef CONFIG_MPEG1SYSTEM_MUXER
+-AVOutputFormat mpeg1system_muxer = {
+- "mpeg",
+- "MPEG1 System format",
+- "video/mpeg",
+- "mpg,mpeg",
+- sizeof(MpegMuxContext),
+- CODEC_ID_MP2,
+- CODEC_ID_MPEG1VIDEO,
+- mpeg_mux_init,
+- mpeg_mux_write_packet,
+- mpeg_mux_end,
+-};
+-#endif
+-#ifdef CONFIG_MPEG1VCD_MUXER
+-AVOutputFormat mpeg1vcd_muxer = {
+- "vcd",
+- "MPEG1 System format (VCD)",
+- "video/mpeg",
+- NULL,
+- sizeof(MpegMuxContext),
+- CODEC_ID_MP2,
+- CODEC_ID_MPEG1VIDEO,
+- mpeg_mux_init,
+- mpeg_mux_write_packet,
+- mpeg_mux_end,
+-};
+-#endif
+-#ifdef CONFIG_MPEG2VOB_MUXER
+-AVOutputFormat mpeg2vob_muxer = {
+- "vob",
+- "MPEG2 PS format (VOB)",
+- "video/mpeg",
+- "vob",
+- sizeof(MpegMuxContext),
+- CODEC_ID_MP2,
+- CODEC_ID_MPEG2VIDEO,
+- mpeg_mux_init,
+- mpeg_mux_write_packet,
+- mpeg_mux_end,
+-};
+-#endif
+
+-/* Same as mpeg2vob_mux except that the pack size is 2324 */
+-#ifdef CONFIG_MPEG2SVCD_MUXER
+-AVOutputFormat mpeg2svcd_muxer = {
+- "svcd",
+- "MPEG2 PS format (VOB)",
+- "video/mpeg",
+- "vob",
+- sizeof(MpegMuxContext),
+- CODEC_ID_MP2,
+- CODEC_ID_MPEG2VIDEO,
+- mpeg_mux_init,
+- mpeg_mux_write_packet,
+- mpeg_mux_end,
+-};
+-#endif
+-
+-/* Same as mpeg2vob_mux except the 'is_dvd' flag is set to produce NAV pkts */
+-#ifdef CONFIG_MPEG2DVD_MUXER
+-AVOutputFormat mpeg2dvd_muxer = {
+- "dvd",
+- "MPEG2 PS format (DVD VOB)",
+- "video/mpeg",
+- "dvd",
+- sizeof(MpegMuxContext),
+- CODEC_ID_MP2,
+- CODEC_ID_MPEG2VIDEO,
+- mpeg_mux_init,
+- mpeg_mux_write_packet,
+- mpeg_mux_end,
+-};
+-#endif
+-
+ #ifdef CONFIG_MPEGPS_DEMUXER
+ AVInputFormat mpegps_demuxer = {
+ "mpeg",
+@@ -1852,3 +563,4 @@
+ .flags = AVFMT_SHOW_IDS,
+ };
+ #endif
++
+Index: libavformat/mpeg.h
+===================================================================
+--- libavformat/mpeg.h (revision 0)
++++ libavformat/mpeg.h (revision 0)
+@@ -0,0 +1,54 @@
++/*
++ * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
++ *
++ * This file is part of FFmpeg.
++ *
++ * FFmpeg is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU Lesser General Public
++ * License as published by the Free Software Foundation; either
++ * version 2.1 of the License, or (at your option) any later version.
++ *
++ * FFmpeg is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ * Lesser General Public License for more details.
++ *
++ * You should have received a copy of the GNU Lesser General Public
++ * License along with FFmpeg; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/**
++ * @file mpeg.h
++ * MPEG1/2 muxer/demuxer header.
++ */
++
++#ifndef MPEG_H
++#define MPEG_H
++
++/* mpeg2 */
++#define PROGRAM_STREAM_MAP 0x1bc
++#define PRIVATE_STREAM_1 0x1bd
++#define PADDING_STREAM 0x1be
++#define PRIVATE_STREAM_2 0x1bf
++
++
++#define AUDIO_ID 0xc0
++#define VIDEO_ID 0xe0
++#define AC3_ID 0x80
++#define DTS_ID 0x8a
++#define LPCM_ID 0xa0
++#define SUB_ID 0x20
++
++
++#define PACK_START_CODE ((unsigned int)0x000001ba)
++#define SYSTEM_HEADER_START_CODE ((unsigned int)0x000001bb)
++#define SEQUENCE_END_CODE ((unsigned int)0x000001b7)
++#define PACKET_START_CODE_MASK ((unsigned int)0xffffff00)
++#define PACKET_START_CODE_PREFIX ((unsigned int)0x00000100)
++#define ISO_11172_END_CODE ((unsigned int)0x000001b9)
++
++static const int lpcm_freq_tab[4] = { 48000, 96000, 44100, 32000 };
++
++#endif /* MPEG_H */
++
+Index: libavformat/mpegenc.c
+===================================================================
+--- libavformat/mpegenc.c (revision 0)
++++ libavformat/mpegenc.c (revision 0)
+@@ -0,0 +1,1299 @@
++/*
++ * MPEG1/2 muxer
++ * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
++ *
++ * This file is part of FFmpeg.
++ *
++ * FFmpeg is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU Lesser General Public
++ * License as published by the Free Software Foundation; either
++ * version 2.1 of the License, or (at your option) any later version.
++ *
++ * FFmpeg is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ * Lesser General Public License for more details.
++ *
++ * You should have received a copy of the GNU Lesser General Public
++ * License along with FFmpeg; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++#include "avformat.h"
++#include "bitstream.h"
++#include "fifo.h"
++#include "mpeg.h"
++
++#define MAX_PAYLOAD_SIZE 4096
++//#define DEBUG_SEEK
++
++#undef NDEBUG
++#include <assert.h>
++
++typedef struct PacketDesc {
++ int64_t pts;
++ int64_t dts;
++ int size;
++ int unwritten_size;
++ int flags;
++ struct PacketDesc *next;
++} PacketDesc;
++
++typedef struct {
++ AVFifoBuffer fifo;
++ uint8_t id;
++ int max_buffer_size; /* in bytes */
++ int buffer_index;
++ PacketDesc *predecode_packet;
++ PacketDesc *premux_packet;
++ PacketDesc **next_packet;
++ int packet_number;
++ uint8_t lpcm_header[3];
++ int lpcm_align;
++ int bytes_to_iframe;
++ int align_iframe;
++ int64_t vobu_start_pts;
++} StreamInfo;
++
++typedef struct {
++ int packet_size; /* required packet size */
++ int packet_number;
++ int pack_header_freq; /* frequency (in packets^-1) at which we send pack headers */
++ int system_header_freq;
++ int system_header_size;
++ int mux_rate; /* bitrate in units of 50 bytes/s */
++ /* stream info */
++ int audio_bound;
++ int video_bound;
++ int is_mpeg2;
++ int is_vcd;
++ int is_svcd;
++ int is_dvd;
++ int64_t last_scr; /* current system clock */
++
++ double vcd_padding_bitrate; //FIXME floats
++ int64_t vcd_padding_bytes_written;
++
++} MpegMuxContext;
++
++
++#ifdef CONFIG_MUXERS
++AVOutputFormat mpeg1system_muxer;
++AVOutputFormat mpeg1vcd_muxer;
++AVOutputFormat mpeg2vob_muxer;
++AVOutputFormat mpeg2svcd_muxer;
++AVOutputFormat mpeg2dvd_muxer;
++
++static int put_pack_header(AVFormatContext *ctx,
++ uint8_t *buf, int64_t timestamp)
++{
++ MpegMuxContext *s = ctx->priv_data;
++ PutBitContext pb;
++
++ init_put_bits(&pb, buf, 128);
++
++ put_bits(&pb, 32, PACK_START_CODE);
++ if (s->is_mpeg2) {
++ put_bits(&pb, 2, 0x1);
++ } else {
++ put_bits(&pb, 4, 0x2);
++ }
++ put_bits(&pb, 3, (uint32_t)((timestamp >> 30) & 0x07));
++ put_bits(&pb, 1, 1);
++ put_bits(&pb, 15, (uint32_t)((timestamp >> 15) & 0x7fff));
++ put_bits(&pb, 1, 1);
++ put_bits(&pb, 15, (uint32_t)((timestamp) & 0x7fff));
++ put_bits(&pb, 1, 1);
++ if (s->is_mpeg2) {
++ /* clock extension */
++ put_bits(&pb, 9, 0);
++ }
++ put_bits(&pb, 1, 1);
++ put_bits(&pb, 22, s->mux_rate);
++ put_bits(&pb, 1, 1);
++ if (s->is_mpeg2) {
++ put_bits(&pb, 1, 1);
++ put_bits(&pb, 5, 0x1f); /* reserved */
++ put_bits(&pb, 3, 0); /* stuffing length */
++ }
++ flush_put_bits(&pb);
++ return pbBufPtr(&pb) - pb.buf;
++}
++
++static int put_system_header(AVFormatContext *ctx, uint8_t *buf,int only_for_stream_id)
++{
++ MpegMuxContext *s = ctx->priv_data;
++ int size, i, private_stream_coded, id;
++ PutBitContext pb;
++
++ init_put_bits(&pb, buf, 128);
++
++ put_bits(&pb, 32, SYSTEM_HEADER_START_CODE);
++ put_bits(&pb, 16, 0);
++ put_bits(&pb, 1, 1);
++
++ put_bits(&pb, 22, s->mux_rate); /* maximum bit rate of the multiplexed stream */
++ put_bits(&pb, 1, 1); /* marker */
++ if (s->is_vcd && only_for_stream_id==VIDEO_ID) {
++ /* This header applies only to the video stream (see VCD standard p. IV-7)*/
++ put_bits(&pb, 6, 0);
++ } else
++ put_bits(&pb, 6, s->audio_bound);
++
++ if (s->is_vcd) {
++ /* see VCD standard, p. IV-7*/
++ put_bits(&pb, 1, 0);
++ put_bits(&pb, 1, 1);
++ } else {
++ put_bits(&pb, 1, 0); /* variable bitrate*/
++ put_bits(&pb, 1, 0); /* non constrainted bit stream */
++ }
++
++ if (s->is_vcd || s->is_dvd) {
++ /* see VCD standard p IV-7 */
++ put_bits(&pb, 1, 1); /* audio locked */
++ put_bits(&pb, 1, 1); /* video locked */
++ } else {
++ put_bits(&pb, 1, 0); /* audio locked */
++ put_bits(&pb, 1, 0); /* video locked */
++ }
++
++ put_bits(&pb, 1, 1); /* marker */
++
++ if (s->is_vcd && only_for_stream_id==AUDIO_ID) {
++ /* This header applies only to the audio stream (see VCD standard p. IV-7)*/
++ put_bits(&pb, 5, 0);
++ } else
++ put_bits(&pb, 5, s->video_bound);
++
++ if (s->is_dvd) {
++ put_bits(&pb, 1, 0); /* packet_rate_restriction_flag */
++ put_bits(&pb, 7, 0x7f); /* reserved byte */
++ } else
++ put_bits(&pb, 8, 0xff); /* reserved byte */
++
++ /* DVD-Video Stream_bound entries
++ id (0xB9) video, maximum P-STD for stream 0xE0. (P-STD_buffer_bound_scale = 1)
++ id (0xB8) audio, maximum P-STD for any MPEG audio (0xC0 to 0xC7) streams. If there are none set to 4096 (32x128). (P-STD_buffer_bound_scale = 0)
++ id (0xBD) private stream 1 (audio other than MPEG and subpictures). (P-STD_buffer_bound_scale = 1)
++ id (0xBF) private stream 2, NAV packs, set to 2x1024. */
++ if (s->is_dvd) {
++
++ int P_STD_max_video = 0;
++ int P_STD_max_mpeg_audio = 0;
++ int P_STD_max_mpeg_PS1 = 0;
++
++ for(i=0;i<ctx->nb_streams;i++) {
++ StreamInfo *stream = ctx->streams[i]->priv_data;
++
++ id = stream->id;
++ if (id == 0xbd && stream->max_buffer_size > P_STD_max_mpeg_PS1) {
++ P_STD_max_mpeg_PS1 = stream->max_buffer_size;
++ } else if (id >= 0xc0 && id <= 0xc7 && stream->max_buffer_size > P_STD_max_mpeg_audio) {
++ P_STD_max_mpeg_audio = stream->max_buffer_size;
++ } else if (id == 0xe0 && stream->max_buffer_size > P_STD_max_video) {
++ P_STD_max_video = stream->max_buffer_size;
++ }
++ }
++
++ /* video */
++ put_bits(&pb, 8, 0xb9); /* stream ID */
++ put_bits(&pb, 2, 3);
++ put_bits(&pb, 1, 1);
++ put_bits(&pb, 13, P_STD_max_video / 1024);
++
++ /* audio */
++ if (P_STD_max_mpeg_audio == 0)
++ P_STD_max_mpeg_audio = 4096;
++ put_bits(&pb, 8, 0xb8); /* stream ID */
++ put_bits(&pb, 2, 3);
++ put_bits(&pb, 1, 0);
++ put_bits(&pb, 13, P_STD_max_mpeg_audio / 128);
++
++ /* private stream 1 */
++ put_bits(&pb, 8, 0xbd); /* stream ID */
++ put_bits(&pb, 2, 3);
++ put_bits(&pb, 1, 0);
++ put_bits(&pb, 13, P_STD_max_mpeg_PS1 / 128);
++
++ /* private stream 2 */
++ put_bits(&pb, 8, 0xbf); /* stream ID */
++ put_bits(&pb, 2, 3);
++ put_bits(&pb, 1, 1);
++ put_bits(&pb, 13, 2);
++ }
++ else {
++ /* audio stream info */
++ private_stream_coded = 0;
++ for(i=0;i<ctx->nb_streams;i++) {
++ StreamInfo *stream = ctx->streams[i]->priv_data;
++
++
++ /* For VCDs, only include the stream info for the stream
++ that the pack which contains this system belongs to.
++ (see VCD standard p. IV-7) */
++ if ( !s->is_vcd || stream->id==only_for_stream_id
++ || only_for_stream_id==0) {
++
++ id = stream->id;
++ if (id < 0xc0) {
++ /* special case for private streams (AC3 use that) */
++ if (private_stream_coded)
++ continue;
++ private_stream_coded = 1;
++ id = 0xbd;
++ }
++ put_bits(&pb, 8, id); /* stream ID */
++ put_bits(&pb, 2, 3);
++ if (id < 0xe0) {
++ /* audio */
++ put_bits(&pb, 1, 0);
++ put_bits(&pb, 13, stream->max_buffer_size / 128);
++ } else {
++ /* video */
++ put_bits(&pb, 1, 1);
++ put_bits(&pb, 13, stream->max_buffer_size / 1024);
++ }
++ }
++ }
++ }
++
++ flush_put_bits(&pb);
++ size = pbBufPtr(&pb) - pb.buf;
++ /* patch packet size */
++ buf[4] = (size - 6) >> 8;
++ buf[5] = (size - 6) & 0xff;
++
++ return size;
++}
++
++static int get_system_header_size(AVFormatContext *ctx)
++{
++ int buf_index, i, private_stream_coded;
++ StreamInfo *stream;
++ MpegMuxContext *s = ctx->priv_data;
++
++ if (s->is_dvd)
++ return 18; // DVD-Video system headers are 18 bytes fixed length.
++
++ buf_index = 12;
++ private_stream_coded = 0;
++ for(i=0;i<ctx->nb_streams;i++) {
++ stream = ctx->streams[i]->priv_data;
++ if (stream->id < 0xc0) {
++ if (private_stream_coded)
++ continue;
++ private_stream_coded = 1;
++ }
++ buf_index += 3;
++ }
++ return buf_index;
++}
++
++static int mpeg_mux_init(AVFormatContext *ctx)
++{
++ MpegMuxContext *s = ctx->priv_data;
++ int bitrate, i, mpa_id, mpv_id, mps_id, ac3_id, dts_id, lpcm_id, j;
++ AVStream *st;
++ StreamInfo *stream;
++ int audio_bitrate;
++ int video_bitrate;
++
++ s->packet_number = 0;
++ s->is_vcd = (ctx->oformat == &mpeg1vcd_muxer);
++ s->is_svcd = (ctx->oformat == &mpeg2svcd_muxer);
++ s->is_mpeg2 = (ctx->oformat == &mpeg2vob_muxer || ctx->oformat == &mpeg2svcd_muxer || ctx->oformat == &mpeg2dvd_muxer);
++ s->is_dvd = (ctx->oformat == &mpeg2dvd_muxer);
++
++ if(ctx->packet_size)
++ s->packet_size = ctx->packet_size;
++ else
++ s->packet_size = 2048;
++
++ s->vcd_padding_bytes_written = 0;
++ s->vcd_padding_bitrate=0;
++
++ s->audio_bound = 0;
++ s->video_bound = 0;
++ mpa_id = AUDIO_ID;
++ ac3_id = AC3_ID;
++ dts_id = DTS_ID;
++ mpv_id = VIDEO_ID;
++ mps_id = SUB_ID;
++ lpcm_id = LPCM_ID;
++ for(i=0;i<ctx->nb_streams;i++) {
++ st = ctx->streams[i];
++ stream = av_mallocz(sizeof(StreamInfo));
++ if (!stream)
++ goto fail;
++ st->priv_data = stream;
++
++ av_set_pts_info(st, 64, 1, 90000);
++
++ switch(st->codec->codec_type) {
++ case CODEC_TYPE_AUDIO:
++ if (st->codec->codec_id == CODEC_ID_AC3) {
++ stream->id = ac3_id++;
++ } else if (st->codec->codec_id == CODEC_ID_DTS) {
++ stream->id = dts_id++;
++ } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
++ stream->id = lpcm_id++;
++ for(j = 0; j < 4; j++) {
++ if (lpcm_freq_tab[j] == st->codec->sample_rate)
++ break;
++ }
++ if (j == 4)
++ goto fail;
++ if (st->codec->channels > 8)
++ return -1;
++ stream->lpcm_header[0] = 0x0c;
++ stream->lpcm_header[1] = (st->codec->channels - 1) | (j << 4);
++ stream->lpcm_header[2] = 0x80;
++ stream->lpcm_align = st->codec->channels * 2;
++ } else {
++ stream->id = mpa_id++;
++ }
++
++ /* This value HAS to be used for VCD (see VCD standard, p. IV-7).
++ Right now it is also used for everything else.*/
++ stream->max_buffer_size = 4 * 1024;
++ s->audio_bound++;
++ break;
++ case CODEC_TYPE_VIDEO:
++ stream->id = mpv_id++;
++ if (st->codec->rc_buffer_size)
++ stream->max_buffer_size = 6*1024 + st->codec->rc_buffer_size/8;
++ else
++ stream->max_buffer_size = 230*1024; //FIXME this is probably too small as default
++#if 0
++ /* see VCD standard, p. IV-7*/
++ stream->max_buffer_size = 46 * 1024;
++ else
++ /* This value HAS to be used for SVCD (see SVCD standard, p. 26 V.2.3.2).
++ Right now it is also used for everything else.*/
++ stream->max_buffer_size = 230 * 1024;
++#endif
++ s->video_bound++;
++ break;
++ case CODEC_TYPE_SUBTITLE:
++ stream->id = mps_id++;
++ stream->max_buffer_size = 16 * 1024;
++ break;
++ default:
++ return -1;
++ }
++ av_fifo_init(&stream->fifo, 16);
++ }
++ bitrate = 0;
++ audio_bitrate = 0;
++ video_bitrate = 0;
++ for(i=0;i<ctx->nb_streams;i++) {
++ int codec_rate;
++ st = ctx->streams[i];
++ stream = (StreamInfo*) st->priv_data;
++
++ if(st->codec->rc_max_rate || stream->id==VIDEO_ID)
++ codec_rate= st->codec->rc_max_rate;
++ else
++ codec_rate= st->codec->bit_rate;
++
++ if(!codec_rate)
++ codec_rate= (1<<21)*8*50/ctx->nb_streams;
++
++ bitrate += codec_rate;
++
++ if (stream->id==AUDIO_ID)
++ audio_bitrate += codec_rate;
++ else if (stream->id==VIDEO_ID)
++ video_bitrate += codec_rate;
++ }
++
++ if(ctx->mux_rate){
++ s->mux_rate= (ctx->mux_rate + (8 * 50) - 1) / (8 * 50);
++ } else {
++ /* we increase slightly the bitrate to take into account the
++ headers. XXX: compute it exactly */
++ bitrate += bitrate*5/100;
++ bitrate += 10000;
++ s->mux_rate = (bitrate + (8 * 50) - 1) / (8 * 50);
++ }
++
++ if (s->is_vcd) {
++ double overhead_rate;
++
++ /* The VCD standard mandates that the mux_rate field is 3528
++ (see standard p. IV-6).
++ The value is actually "wrong", i.e. if you calculate
++ it using the normal formula and the 75 sectors per second transfer
++ rate you get a different value because the real pack size is 2324,
++ not 2352. But the standard explicitly specifies that the mux_rate
++ field in the header must have this value.*/
++// s->mux_rate=2352 * 75 / 50; /* = 3528*/
++
++ /* The VCD standard states that the muxed stream must be
++ exactly 75 packs / second (the data rate of a single speed cdrom).
++ Since the video bitrate (probably 1150000 bits/sec) will be below
++ the theoretical maximum we have to add some padding packets
++ to make up for the lower data rate.
++ (cf. VCD standard p. IV-6 )*/
++
++ /* Add the header overhead to the data rate.
++ 2279 data bytes per audio pack, 2294 data bytes per video pack*/
++ overhead_rate = ((audio_bitrate / 8.0) / 2279) * (2324 - 2279);
++ overhead_rate += ((video_bitrate / 8.0) / 2294) * (2324 - 2294);
++ overhead_rate *= 8;
++
++ /* Add padding so that the full bitrate is 2324*75 bytes/sec */
++ s->vcd_padding_bitrate = 2324 * 75 * 8 - (bitrate + overhead_rate);
++ }
++
++ if (s->is_vcd || s->is_mpeg2)
++ /* every packet */
++ s->pack_header_freq = 1;
++ else
++ /* every 2 seconds */
++ s->pack_header_freq = 2 * bitrate / s->packet_size / 8;
++
++ /* the above seems to make pack_header_freq zero sometimes */
++ if (s->pack_header_freq == 0)
++ s->pack_header_freq = 1;
++
++ if (s->is_mpeg2)
++ /* every 200 packets. Need to look at the spec. */
++ s->system_header_freq = s->pack_header_freq * 40;
++ else if (s->is_vcd)
++ /* the standard mandates that there are only two system headers
++ in the whole file: one in the first packet of each stream.
++ (see standard p. IV-7 and IV-8) */
++ s->system_header_freq = 0x7fffffff;
++ else
++ s->system_header_freq = s->pack_header_freq * 5;
++
++ for(i=0;i<ctx->nb_streams;i++) {
++ stream = ctx->streams[i]->priv_data;
++ stream->packet_number = 0;
++ }
++ s->system_header_size = get_system_header_size(ctx);
++ s->last_scr = 0;
++ return 0;
++ fail:
++ for(i=0;i<ctx->nb_streams;i++) {
++ av_free(ctx->streams[i]->priv_data);
++ }
++ return AVERROR(ENOMEM);
++}
++
++static inline void put_timestamp(ByteIOContext *pb, int id, int64_t timestamp)
++{
++ put_byte(pb,
++ (id << 4) |
++ (((timestamp >> 30) & 0x07) << 1) |
++ 1);
++ put_be16(pb, (uint16_t)((((timestamp >> 15) & 0x7fff) << 1) | 1));
++ put_be16(pb, (uint16_t)((((timestamp) & 0x7fff) << 1) | 1));
++}
++
++
++/* return the number of padding bytes that should be inserted into
++ the multiplexed stream.*/
++static int get_vcd_padding_size(AVFormatContext *ctx, int64_t pts)
++{
++ MpegMuxContext *s = ctx->priv_data;
++ int pad_bytes = 0;
++
++ if (s->vcd_padding_bitrate > 0 && pts!=AV_NOPTS_VALUE)
++ {
++ int64_t full_pad_bytes;
++
++ full_pad_bytes = (int64_t)((s->vcd_padding_bitrate * (pts / 90000.0)) / 8.0); //FIXME this is wrong
++ pad_bytes = (int) (full_pad_bytes - s->vcd_padding_bytes_written);
++
++ if (pad_bytes<0)
++ /* might happen if we have already padded to a later timestamp. This
++ can occur if another stream has already advanced further.*/
++ pad_bytes=0;
++ }
++
++ return pad_bytes;
++}
++
++
++#if 0 /* unused, remove? */
++/* return the exact available payload size for the next packet for
++ stream 'stream_index'. 'pts' and 'dts' are only used to know if
++ timestamps are needed in the packet header. */
++static int get_packet_payload_size(AVFormatContext *ctx, int stream_index,
++ int64_t pts, int64_t dts)
++{
++ MpegMuxContext *s = ctx->priv_data;
++ int buf_index;
++ StreamInfo *stream;
++
++ stream = ctx->streams[stream_index]->priv_data;
++
++ buf_index = 0;
++ if (((s->packet_number % s->pack_header_freq) == 0)) {
++ /* pack header size */
++ if (s->is_mpeg2)
++ buf_index += 14;
++ else
++ buf_index += 12;
++
++ if (s->is_vcd) {
++ /* there is exactly one system header for each stream in a VCD MPEG,
++ One in the very first video packet and one in the very first
++ audio packet (see VCD standard p. IV-7 and IV-8).*/
++
++ if (stream->packet_number==0)
++ /* The system headers refer only to the stream they occur in,
++ so they have a constant size.*/
++ buf_index += 15;
++
++ } else {
++ if ((s->packet_number % s->system_header_freq) == 0)
++ buf_index += s->system_header_size;
++ }
++ }
++
++ if ((s->is_vcd && stream->packet_number==0)
++ || (s->is_svcd && s->packet_number==0))
++ /* the first pack of each stream contains only the pack header,
++ the system header and some padding (see VCD standard p. IV-6)
++ Add the padding size, so that the actual payload becomes 0.*/
++ buf_index += s->packet_size - buf_index;
++ else {
++ /* packet header size */
++ buf_index += 6;
++ if (s->is_mpeg2) {
++ buf_index += 3;
++ if (stream->packet_number==0)
++ buf_index += 3; /* PES extension */
++ buf_index += 1; /* obligatory stuffing byte */
++ }
++ if (pts != AV_NOPTS_VALUE) {
++ if (dts != pts)
++ buf_index += 5 + 5;
++ else
++ buf_index += 5;
++
++ } else {
++ if (!s->is_mpeg2)
++ buf_index++;
++ }
++
++ if (stream->id < 0xc0) {
++ /* AC3/LPCM private data header */
++ buf_index += 4;
++ if (stream->id >= 0xa0) {
++ int n;
++ buf_index += 3;
++ /* NOTE: we round the payload size to an integer number of
++ LPCM samples */
++ n = (s->packet_size - buf_index) % stream->lpcm_align;
++ if (n)
++ buf_index += (stream->lpcm_align - n);
++ }
++ }
++
++ if (s->is_vcd && stream->id == AUDIO_ID)
++ /* The VCD standard demands that 20 zero bytes follow
++ each audio packet (see standard p. IV-8).*/
++ buf_index+=20;
++ }
++ return s->packet_size - buf_index;
++}
++#endif
++
++/* Write an MPEG padding packet header. */
++static void put_padding_packet(AVFormatContext *ctx, ByteIOContext *pb,int packet_bytes)
++{
++ MpegMuxContext *s = ctx->priv_data;
++ int i;
++
++ put_be32(pb, PADDING_STREAM);
++ put_be16(pb, packet_bytes - 6);
++ if (!s->is_mpeg2) {
++ put_byte(pb, 0x0f);
++ packet_bytes -= 7;
++ } else
++ packet_bytes -= 6;
++
++ for(i=0;i<packet_bytes;i++)
++ put_byte(pb, 0xff);
++}
++
++static int get_nb_frames(AVFormatContext *ctx, StreamInfo *stream, int len){
++ int nb_frames=0;
++ PacketDesc *pkt_desc= stream->premux_packet;
++
++ while(len>0){
++ if(pkt_desc->size == pkt_desc->unwritten_size)
++ nb_frames++;
++ len -= pkt_desc->unwritten_size;
++ pkt_desc= pkt_desc->next;
++ }
++
++ return nb_frames;
++}
++
++/* flush the packet on stream stream_index */
++static int flush_packet(AVFormatContext *ctx, int stream_index,
++ int64_t pts, int64_t dts, int64_t scr, int trailer_size)
++{
++ MpegMuxContext *s = ctx->priv_data;
++ StreamInfo *stream = ctx->streams[stream_index]->priv_data;
++ uint8_t *buf_ptr;
++ int size, payload_size, startcode, id, stuffing_size, i, header_len;
++ int packet_size;
++ uint8_t buffer[128];
++ int zero_trail_bytes = 0;
++ int pad_packet_bytes = 0;
++ int pes_flags;
++ int general_pack = 0; /*"general" pack without data specific to one stream?*/
++ int nb_frames;
++
++ id = stream->id;
++
++#if 0
++ printf("packet ID=%2x PTS=%0.3f\n",
++ id, pts / 90000.0);
++#endif
++
++ buf_ptr = buffer;
++
++ if ((s->packet_number % s->pack_header_freq) == 0 || s->last_scr != scr) {
++ /* output pack and systems header if needed */
++ size = put_pack_header(ctx, buf_ptr, scr);
++ buf_ptr += size;
++ s->last_scr= scr;
++
++ if (s->is_vcd) {
++ /* there is exactly one system header for each stream in a VCD MPEG,
++ One in the very first video packet and one in the very first
++ audio packet (see VCD standard p. IV-7 and IV-8).*/
++
++ if (stream->packet_number==0) {
++ size = put_system_header(ctx, buf_ptr, id);
++ buf_ptr += size;
++ }
++ } else if (s->is_dvd) {
++ if (stream->align_iframe || s->packet_number == 0){
++ int PES_bytes_to_fill = s->packet_size - size - 10;
++
++ if (pts != AV_NOPTS_VALUE) {
++ if (dts != pts)
++ PES_bytes_to_fill -= 5 + 5;
++ else
++ PES_bytes_to_fill -= 5;
++ }
++
++ if (stream->bytes_to_iframe == 0 || s->packet_number == 0) {
++ size = put_system_header(ctx, buf_ptr, 0);
++ buf_ptr += size;
++ size = buf_ptr - buffer;
++ put_buffer(&ctx->pb, buffer, size);
++
++ put_be32(&ctx->pb, PRIVATE_STREAM_2);
++ put_be16(&ctx->pb, 0x03d4); // length
++ put_byte(&ctx->pb, 0x00); // substream ID, 00=PCI
++ for (i = 0; i < 979; i++)
++ put_byte(&ctx->pb, 0x00);
++
++ put_be32(&ctx->pb, PRIVATE_STREAM_2);
++ put_be16(&ctx->pb, 0x03fa); // length
++ put_byte(&ctx->pb, 0x01); // substream ID, 01=DSI
++ for (i = 0; i < 1017; i++)
++ put_byte(&ctx->pb, 0x00);
++
++ memset(buffer, 0, 128);
++ buf_ptr = buffer;
++ s->packet_number++;
++ stream->align_iframe = 0;
++ scr += s->packet_size*90000LL / (s->mux_rate*50LL); //FIXME rounding and first few bytes of each packet
++ size = put_pack_header(ctx, buf_ptr, scr);
++ s->last_scr= scr;
++ buf_ptr += size;
++ /* GOP Start */
++ } else if (stream->bytes_to_iframe < PES_bytes_to_fill) {
++ pad_packet_bytes = PES_bytes_to_fill - stream->bytes_to_iframe;
++ }
++ }
++ } else {
++ if ((s->packet_number % s->system_header_freq) == 0) {
++ size = put_system_header(ctx, buf_ptr, 0);
++ buf_ptr += size;
++ }
++ }
++ }
++ size = buf_ptr - buffer;
++ put_buffer(&ctx->pb, buffer, size);
++
++ packet_size = s->packet_size - size;
++
++ if (s->is_vcd && id == AUDIO_ID)
++ /* The VCD standard demands that 20 zero bytes follow
++ each audio pack (see standard p. IV-8).*/
++ zero_trail_bytes += 20;
++
++ if ((s->is_vcd && stream->packet_number==0)
++ || (s->is_svcd && s->packet_number==0)) {
++ /* for VCD the first pack of each stream contains only the pack header,
++ the system header and lots of padding (see VCD standard p. IV-6).
++ In the case of an audio pack, 20 zero bytes are also added at
++ the end.*/
++ /* For SVCD we fill the very first pack to increase compatibility with
++ some DVD players. Not mandated by the standard.*/
++ if (s->is_svcd)
++ general_pack = 1; /* the system header refers to both streams and no stream data*/
++ pad_packet_bytes = packet_size - zero_trail_bytes;
++ }
++
++ packet_size -= pad_packet_bytes + zero_trail_bytes;
++
++ if (packet_size > 0) {
++
++ /* packet header size */
++ packet_size -= 6;
++
++ /* packet header */
++ if (s->is_mpeg2) {
++ header_len = 3;
++ if (stream->packet_number==0)
++ header_len += 3; /* PES extension */
++ header_len += 1; /* obligatory stuffing byte */
++ } else {
++ header_len = 0;
++ }
++ if (pts != AV_NOPTS_VALUE) {
++ if (dts != pts)
++ header_len += 5 + 5;
++ else
++ header_len += 5;
++ } else {
++ if (!s->is_mpeg2)
++ header_len++;
++ }
++
++ payload_size = packet_size - header_len;
++ if (id < 0xc0) {
++ startcode = PRIVATE_STREAM_1;
++ payload_size -= 1;
++ if (id >= 0x40) {
++ payload_size -= 3;
++ if (id >= 0xa0)
++ payload_size -= 3;
++ }
++ } else {
++ startcode = 0x100 + id;
++ }
++
++ stuffing_size = payload_size - av_fifo_size(&stream->fifo);
++
++ // first byte does not fit -> reset pts/dts + stuffing
++ if(payload_size <= trailer_size && pts != AV_NOPTS_VALUE){
++ int timestamp_len=0;
++ if(dts != pts)
++ timestamp_len += 5;
++ if(pts != AV_NOPTS_VALUE)
++ timestamp_len += s->is_mpeg2 ? 5 : 4;
++ pts=dts= AV_NOPTS_VALUE;
++ header_len -= timestamp_len;
++ if (s->is_dvd && stream->align_iframe) {
++ pad_packet_bytes += timestamp_len;
++ packet_size -= timestamp_len;
++ } else {
++ payload_size += timestamp_len;
++ }
++ stuffing_size += timestamp_len;
++ if(payload_size > trailer_size)
++ stuffing_size += payload_size - trailer_size;
++ }
++
++ if (pad_packet_bytes > 0 && pad_packet_bytes <= 7) { // can't use padding, so use stuffing
++ packet_size += pad_packet_bytes;
++ payload_size += pad_packet_bytes; // undo the previous adjustment
++ if (stuffing_size < 0) {
++ stuffing_size = pad_packet_bytes;
++ } else {
++ stuffing_size += pad_packet_bytes;
++ }
++ pad_packet_bytes = 0;
++ }
++
++ if (stuffing_size < 0)
++ stuffing_size = 0;
++ if (stuffing_size > 16) { /*<=16 for MPEG-1, <=32 for MPEG-2*/
++ pad_packet_bytes += stuffing_size;
++ packet_size -= stuffing_size;
++ payload_size -= stuffing_size;
++ stuffing_size = 0;
++ }
++
++ nb_frames= get_nb_frames(ctx, stream, payload_size - stuffing_size);
++
++ put_be32(&ctx->pb, startcode);
++
++ put_be16(&ctx->pb, packet_size);
++
++ if (!s->is_mpeg2)
++ for(i=0;i<stuffing_size;i++)
++ put_byte(&ctx->pb, 0xff);
++
++ if (s->is_mpeg2) {
++ put_byte(&ctx->pb, 0x80); /* mpeg2 id */
++
++ pes_flags=0;
++
++ if (pts != AV_NOPTS_VALUE) {
++ pes_flags |= 0x80;
++ if (dts != pts)
++ pes_flags |= 0x40;
++ }
++
++ /* Both the MPEG-2 and the SVCD standards demand that the
++ P-STD_buffer_size field be included in the first packet of
++ every stream. (see SVCD standard p. 26 V.2.3.1 and V.2.3.2
++ and MPEG-2 standard 2.7.7) */
++ if (stream->packet_number == 0)
++ pes_flags |= 0x01;
++
++ put_byte(&ctx->pb, pes_flags); /* flags */
++ put_byte(&ctx->pb, header_len - 3 + stuffing_size);
++
++ if (pes_flags & 0x80) /*write pts*/
++ put_timestamp(&ctx->pb, (pes_flags & 0x40) ? 0x03 : 0x02, pts);
++ if (pes_flags & 0x40) /*write dts*/
++ put_timestamp(&ctx->pb, 0x01, dts);
++
++ if (pes_flags & 0x01) { /*write pes extension*/
++ put_byte(&ctx->pb, 0x10); /* flags */
++
++ /* P-STD buffer info */
++ if (id == AUDIO_ID)
++ put_be16(&ctx->pb, 0x4000 | stream->max_buffer_size/128);
++ else
++ put_be16(&ctx->pb, 0x6000 | stream->max_buffer_size/1024);
++ }
++
++ } else {
++ if (pts != AV_NOPTS_VALUE) {
++ if (dts != pts) {
++ put_timestamp(&ctx->pb, 0x03, pts);
++ put_timestamp(&ctx->pb, 0x01, dts);
++ } else {
++ put_timestamp(&ctx->pb, 0x02, pts);
++ }
++ } else {
++ put_byte(&ctx->pb, 0x0f);
++ }
++ }
++
++ if (s->is_mpeg2) {
++ /* special stuffing byte that is always written
++ to prevent accidental generation of start codes. */
++ put_byte(&ctx->pb, 0xff);
++
++ for(i=0;i<stuffing_size;i++)
++ put_byte(&ctx->pb, 0xff);
++ }
++
++ if (startcode == PRIVATE_STREAM_1) {
++ put_byte(&ctx->pb, id);
++ if (id >= 0xa0) {
++ /* LPCM (XXX: check nb_frames) */
++ put_byte(&ctx->pb, 7);
++ put_be16(&ctx->pb, 4); /* skip 3 header bytes */
++ put_byte(&ctx->pb, stream->lpcm_header[0]);
++ put_byte(&ctx->pb, stream->lpcm_header[1]);
++ put_byte(&ctx->pb, stream->lpcm_header[2]);
++ } else if (id >= 0x40) {
++ /* AC3 */
++ put_byte(&ctx->pb, nb_frames);
++ put_be16(&ctx->pb, trailer_size+1);
++ }
++ }
++
++ /* output data */
++ if(av_fifo_generic_read(&stream->fifo, payload_size - stuffing_size, &put_buffer, &ctx->pb) < 0)
++ return -1;
++ stream->bytes_to_iframe -= payload_size - stuffing_size;
++ }else{
++ payload_size=
++ stuffing_size= 0;
++ }
++
++ if (pad_packet_bytes > 0)
++ put_padding_packet(ctx,&ctx->pb, pad_packet_bytes);
++
++ for(i=0;i<zero_trail_bytes;i++)
++ put_byte(&ctx->pb, 0x00);
++
++ put_flush_packet(&ctx->pb);
++
++ s->packet_number++;
++
++ /* only increase the stream packet number if this pack actually contains
++ something that is specific to this stream! I.e. a dedicated header
++ or some data.*/
++ if (!general_pack)
++ stream->packet_number++;
++
++ return payload_size - stuffing_size;
++}
++
++static void put_vcd_padding_sector(AVFormatContext *ctx)
++{
++ /* There are two ways to do this padding: writing a sector/pack
++ of 0 values, or writing an MPEG padding pack. Both seem to
++ work with most decoders, BUT the VCD standard only allows a 0-sector
++ (see standard p. IV-4, IV-5).
++ So a 0-sector it is...*/
++
++ MpegMuxContext *s = ctx->priv_data;
++ int i;
++
++ for(i=0;i<s->packet_size;i++)
++ put_byte(&ctx->pb, 0);
++
++ s->vcd_padding_bytes_written += s->packet_size;
++
++ put_flush_packet(&ctx->pb);
++
++ /* increasing the packet number is correct. The SCR of the following packs
++ is calculated from the packet_number and it has to include the padding
++ sector (it represents the sector index, not the MPEG pack index)
++ (see VCD standard p. IV-6)*/
++ s->packet_number++;
++}
++
++#if 0 /* unused, remove? */
++static int64_t get_vcd_scr(AVFormatContext *ctx,int stream_index,int64_t pts)
++{
++ MpegMuxContext *s = ctx->priv_data;
++ int64_t scr;
++
++ /* Since the data delivery rate is constant, SCR is computed
++ using the formula C + i * 1200 where C is the start constant
++ and i is the pack index.
++ It is recommended that SCR 0 is at the beginning of the VCD front
++ margin (a sequence of empty Form 2 sectors on the CD).
++ It is recommended that the front margin is 30 sectors long, so
++ we use C = 30*1200 = 36000
++ (Note that even if the front margin is not 30 sectors the file
++ will still be correct according to the standard. It just won't have
++ the "recommended" value).*/
++ scr = 36000 + s->packet_number * 1200;
++
++ return scr;
++}
++#endif
++
++static int remove_decoded_packets(AVFormatContext *ctx, int64_t scr){
++// MpegMuxContext *s = ctx->priv_data;
++ int i;
++
++ for(i=0; i<ctx->nb_streams; i++){
++ AVStream *st = ctx->streams[i];
++ StreamInfo *stream = st->priv_data;
++ PacketDesc *pkt_desc;
++
++ while((pkt_desc= stream->predecode_packet)
++ && scr > pkt_desc->dts){ //FIXME > vs >=
++ if(stream->buffer_index < pkt_desc->size ||
++ stream->predecode_packet == stream->premux_packet){
++ av_log(ctx, AV_LOG_ERROR,
++ "buffer underflow i=%d bufi=%d size=%d\n",
++ i, stream->buffer_index, pkt_desc->size);
++ break;
++ }
++ stream->buffer_index -= pkt_desc->size;
++
++ stream->predecode_packet= pkt_desc->next;
++ av_freep(&pkt_desc);
++ }
++ }
++
++ return 0;
++}
++
++static int output_packet(AVFormatContext *ctx, int flush){
++ MpegMuxContext *s = ctx->priv_data;
++ AVStream *st;
++ StreamInfo *stream;
++ int i, avail_space, es_size, trailer_size;
++ int best_i= -1;
++ int best_score= INT_MIN;
++ int ignore_constraints=0;
++ int64_t scr= s->last_scr;
++ PacketDesc *timestamp_packet;
++ const int64_t max_delay= av_rescale(ctx->max_delay, 90000, AV_TIME_BASE);
++
++retry:
++ for(i=0; i<ctx->nb_streams; i++){
++ AVStream *st = ctx->streams[i];
++ StreamInfo *stream = st->priv_data;
++ const int avail_data= av_fifo_size(&stream->fifo);
++ const int space= stream->max_buffer_size - stream->buffer_index;
++ int rel_space= 1024*space / stream->max_buffer_size;
++ PacketDesc *next_pkt= stream->premux_packet;
++
++ /* for subtitle, a single PES packet must be generated,
++ so we flush after every single subtitle packet */
++ if(s->packet_size > avail_data && !flush
++ && st->codec->codec_type != CODEC_TYPE_SUBTITLE)
++ return 0;
++ if(avail_data==0)
++ continue;
++ assert(avail_data>0);
++
++ if(space < s->packet_size && !ignore_constraints)
++ continue;
++
++ if(next_pkt && next_pkt->dts - scr > max_delay)
++ continue;
++
++ if(rel_space > best_score){
++ best_score= rel_space;
++ best_i = i;
++ avail_space= space;
++ }
++ }
++
++ if(best_i < 0){
++ int64_t best_dts= INT64_MAX;
++
++ for(i=0; i<ctx->nb_streams; i++){
++ AVStream *st = ctx->streams[i];
++ StreamInfo *stream = st->priv_data;
++ PacketDesc *pkt_desc= stream->predecode_packet;
++ if(pkt_desc && pkt_desc->dts < best_dts)
++ best_dts= pkt_desc->dts;
++ }
++
++#if 0
++ av_log(ctx, AV_LOG_DEBUG, "bumping scr, scr:%f, dts:%f\n",
++ scr/90000.0, best_dts/90000.0);
++#endif
++ if(best_dts == INT64_MAX)
++ return 0;
++
++ if(scr >= best_dts+1 && !ignore_constraints){
++ av_log(ctx, AV_LOG_ERROR, "packet too large, ignoring buffer limits to mux it\n");
++ ignore_constraints= 1;
++ }
++ scr= FFMAX(best_dts+1, scr);
++ if(remove_decoded_packets(ctx, scr) < 0)
++ return -1;
++ goto retry;
++ }
++
++ assert(best_i >= 0);
++
++ st = ctx->streams[best_i];
++ stream = st->priv_data;
++
++ assert(av_fifo_size(&stream->fifo) > 0);
++
++ assert(avail_space >= s->packet_size || ignore_constraints);
++
++ timestamp_packet= stream->premux_packet;
++ if(timestamp_packet->unwritten_size == timestamp_packet->size){
++ trailer_size= 0;
++ }else{
++ trailer_size= timestamp_packet->unwritten_size;
++ timestamp_packet= timestamp_packet->next;
++ }
++
++ if(timestamp_packet){
++//av_log(ctx, AV_LOG_DEBUG, "dts:%f pts:%f scr:%f stream:%d\n", timestamp_packet->dts/90000.0, timestamp_packet->pts/90000.0, scr/90000.0, best_i);
++ es_size= flush_packet(ctx, best_i, timestamp_packet->pts, timestamp_packet->dts, scr, trailer_size);
++ }else{
++ assert(av_fifo_size(&stream->fifo) == trailer_size);
++ es_size= flush_packet(ctx, best_i, AV_NOPTS_VALUE, AV_NOPTS_VALUE, scr, trailer_size);
++ }
++
++ if (s->is_vcd) {
++ /* Write one or more padding sectors, if necessary, to reach
++ the constant overall bitrate.*/
++ int vcd_pad_bytes;
++
++ while((vcd_pad_bytes = get_vcd_padding_size(ctx,stream->premux_packet->pts) ) >= s->packet_size){ //FIXME pts cannot be correct here
++ put_vcd_padding_sector(ctx);
++ s->last_scr += s->packet_size*90000LL / (s->mux_rate*50LL); //FIXME rounding and first few bytes of each packet
++ }
++ }
++
++ stream->buffer_index += es_size;
++ s->last_scr += s->packet_size*90000LL / (s->mux_rate*50LL); //FIXME rounding and first few bytes of each packet
++
++ while(stream->premux_packet && stream->premux_packet->unwritten_size <= es_size){
++ es_size -= stream->premux_packet->unwritten_size;
++ stream->premux_packet= stream->premux_packet->next;
++ }
++ if(es_size)
++ stream->premux_packet->unwritten_size -= es_size;
++
++ if(remove_decoded_packets(ctx, s->last_scr) < 0)
++ return -1;
++
++ return 1;
++}
++
++static int mpeg_mux_write_packet(AVFormatContext *ctx, AVPacket *pkt)
++{
++ MpegMuxContext *s = ctx->priv_data;
++ int stream_index= pkt->stream_index;
++ int size= pkt->size;
++ uint8_t *buf= pkt->data;
++ AVStream *st = ctx->streams[stream_index];
++ StreamInfo *stream = st->priv_data;
++ int64_t pts, dts;
++ PacketDesc *pkt_desc;
++ const int preload= av_rescale(ctx->preload, 90000, AV_TIME_BASE);
++ const int is_iframe = st->codec->codec_type == CODEC_TYPE_VIDEO && (pkt->flags & PKT_FLAG_KEY);
++
++ pts= pkt->pts;
++ dts= pkt->dts;
++
++ if(pts != AV_NOPTS_VALUE) pts += preload;
++ if(dts != AV_NOPTS_VALUE) dts += preload;
++
++//av_log(ctx, AV_LOG_DEBUG, "dts:%f pts:%f flags:%d stream:%d nopts:%d\n", dts/90000.0, pts/90000.0, pkt->flags, pkt->stream_index, pts != AV_NOPTS_VALUE);
++ if (!stream->premux_packet)
++ stream->next_packet = &stream->premux_packet;
++ *stream->next_packet=
++ pkt_desc= av_mallocz(sizeof(PacketDesc));
++ pkt_desc->pts= pts;
++ pkt_desc->dts= dts;
++ pkt_desc->unwritten_size=
++ pkt_desc->size= size;
++ if(!stream->predecode_packet)
++ stream->predecode_packet= pkt_desc;
++ stream->next_packet= &pkt_desc->next;
++
++ av_fifo_realloc(&stream->fifo, av_fifo_size(&stream->fifo) + size + 1);
++
++ if (s->is_dvd){
++ if (is_iframe && (s->packet_number == 0 || (pts - stream->vobu_start_pts >= 36000))) { // min VOBU length 0.4 seconds (mpucoder)
++ stream->bytes_to_iframe = av_fifo_size(&stream->fifo);
++ stream->align_iframe = 1;
++ stream->vobu_start_pts = pts;
++ } else {
++ stream->align_iframe = 0;
++ }
++ }
++
++ av_fifo_write(&stream->fifo, buf, size);
++
++ for(;;){
++ int ret= output_packet(ctx, 0);
++ if(ret<=0)
++ return ret;
++ }
++}
++
++static int mpeg_mux_end(AVFormatContext *ctx)
++{
++// MpegMuxContext *s = ctx->priv_data;
++ StreamInfo *stream;
++ int i;
++
++ for(;;){
++ int ret= output_packet(ctx, 1);
++ if(ret<0)
++ return ret;
++ else if(ret==0)
++ break;
++ }
++
++ /* End header according to MPEG1 systems standard. We do not write
++ it as it is usually not needed by decoders and because it
++ complicates MPEG stream concatenation. */
++ //put_be32(&ctx->pb, ISO_11172_END_CODE);
++ //put_flush_packet(&ctx->pb);
++
++ for(i=0;i<ctx->nb_streams;i++) {
++ stream = ctx->streams[i]->priv_data;
++
++ assert(av_fifo_size(&stream->fifo) == 0);
++ av_fifo_free(&stream->fifo);
++ }
++ return 0;
++}
++#endif //CONFIG_MUXERS
++
++
++#ifdef CONFIG_MPEG1SYSTEM_MUXER
++AVOutputFormat mpeg1system_muxer = {
++ "mpeg",
++ "MPEG1 System format",
++ "video/mpeg",
++ "mpg,mpeg",
++ sizeof(MpegMuxContext),
++ CODEC_ID_MP2,
++ CODEC_ID_MPEG1VIDEO,
++ mpeg_mux_init,
++ mpeg_mux_write_packet,
++ mpeg_mux_end,
++};
++#endif
++#ifdef CONFIG_MPEG1VCD_MUXER
++AVOutputFormat mpeg1vcd_muxer = {
++ "vcd",
++ "MPEG1 System format (VCD)",
++ "video/mpeg",
++ NULL,
++ sizeof(MpegMuxContext),
++ CODEC_ID_MP2,
++ CODEC_ID_MPEG1VIDEO,
++ mpeg_mux_init,
++ mpeg_mux_write_packet,
++ mpeg_mux_end,
++};
++#endif
++#ifdef CONFIG_MPEG2VOB_MUXER
++AVOutputFormat mpeg2vob_muxer = {
++ "vob",
++ "MPEG2 PS format (VOB)",
++ "video/mpeg",
++ "vob",
++ sizeof(MpegMuxContext),
++ CODEC_ID_MP2,
++ CODEC_ID_MPEG2VIDEO,
++ mpeg_mux_init,
++ mpeg_mux_write_packet,
++ mpeg_mux_end,
++};
++#endif
++
++/* Same as mpeg2vob_mux except that the pack size is 2324 */
++#ifdef CONFIG_MPEG2SVCD_MUXER
++AVOutputFormat mpeg2svcd_muxer = {
++ "svcd",
++ "MPEG2 PS format (VOB)",
++ "video/mpeg",
++ "vob",
++ sizeof(MpegMuxContext),
++ CODEC_ID_MP2,
++ CODEC_ID_MPEG2VIDEO,
++ mpeg_mux_init,
++ mpeg_mux_write_packet,
++ mpeg_mux_end,
++};
++#endif
++
++/* Same as mpeg2vob_mux except the 'is_dvd' flag is set to produce NAV pkts */
++#ifdef CONFIG_MPEG2DVD_MUXER
++AVOutputFormat mpeg2dvd_muxer = {
++ "dvd",
++ "MPEG2 PS format (DVD VOB)",
++ "video/mpeg",
++ "dvd",
++ sizeof(MpegMuxContext),
++ CODEC_ID_MP2,
++ CODEC_ID_MPEG2VIDEO,
++ mpeg_mux_init,
++ mpeg_mux_write_packet,
++ mpeg_mux_end,
++};
++#endif
++
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