-typedef struct PacketDesc {
- int64_t pts;
- int64_t dts;
- int size;
- int unwritten_size;
- int flags;
- struct PacketDesc *next;
-} PacketDesc;
-
-typedef struct {
- FifoBuffer 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;
- uint8_t *fifo_iframe_ptr;
- int align_iframe;
-} 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
-
-static const int lpcm_freq_tab[4] = { 48000, 96000, 44100, 32000 };
-
-#ifdef CONFIG_ENCODERS
-static AVOutputFormat mpeg1system_mux;
-static AVOutputFormat mpeg1vcd_mux;
-static AVOutputFormat mpeg2vob_mux;
-static AVOutputFormat mpeg2svcd_mux;
-static AVOutputFormat mpeg2dvd_mux;
-
-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, 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_mux);
- s->is_svcd = (ctx->oformat == &mpeg2svcd_mux);
- s->is_mpeg2 = (ctx->oformat == &mpeg2vob_mux || ctx->oformat == &mpeg2svcd_mux || ctx->oformat == &mpeg2dvd_mux);
- s->is_dvd = (ctx->oformat == &mpeg2dvd_mux);
-
- 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;
- 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;
- default:
- return -1;
- }
- fifo_init(&stream->fifo, 2*stream->max_buffer_size + 100*MAX_PAYLOAD_SIZE); //FIXME think about the size maybe dynamically realloc
- stream->next_packet= &stream->premux_packet;
- }
- 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 -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;
-}
-
-
-/* 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;
-}
-
-/* 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 bytes_to_iframe;
- int PES_bytes_to_fill;
- if (stream->fifo_iframe_ptr >= stream->fifo.rptr) {
- bytes_to_iframe = stream->fifo_iframe_ptr - stream->fifo.rptr;
- } else {
- bytes_to_iframe = (stream->fifo.end - stream->fifo.rptr) + (stream->fifo_iframe_ptr - stream->fifo.buffer);
- }
- 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 (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 (bytes_to_iframe < PES_bytes_to_fill) {
- pad_packet_bytes = PES_bytes_to_fill - 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 -= 4;
- if (id >= 0xa0)
- payload_size -= 3;
- } else {
- startcode = 0x100 + id;
- }
-
- stuffing_size = payload_size - fifo_size(&stream->fifo, stream->fifo.rptr);
-
- // first byte doesnt 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 {
- /* AC3 */
- put_byte(&ctx->pb, nb_frames);
- put_be16(&ctx->pb, trailer_size+1);
- }
- }
-
- /* output data */
- if(put_fifo(&ctx->pb, &stream->fifo, payload_size - stuffing_size, &stream->fifo.rptr) < 0)
- return -1;
- }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;