| /* |
| * 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 "libavutil/fifo.h" |
| #include "libavcodec/bitstream.h" |
| #include "avformat.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; |
| |
| extern AVOutputFormat mpeg1vcd_muxer; |
| extern AVOutputFormat mpeg2dvd_muxer; |
| extern AVOutputFormat mpeg2svcd_muxer; |
| extern AVOutputFormat mpeg2vob_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 (AC-3 uses 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 = (CONFIG_MPEG1VCD_MUXER && ctx->oformat == &mpeg1vcd_muxer); |
| s->is_svcd = (CONFIG_MPEG2SVCD_MUXER && ctx->oformat == &mpeg2svcd_muxer); |
| s->is_mpeg2 = ((CONFIG_MPEG2VOB_MUXER && ctx->oformat == &mpeg2vob_muxer) || |
| (CONFIG_MPEG2DVD_MUXER && ctx->oformat == &mpeg2dvd_muxer) || |
| (CONFIG_MPEG2SVCD_MUXER && ctx->oformat == &mpeg2svcd_muxer)); |
| s->is_dvd = (CONFIG_MPEG2DVD_MUXER && 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) { |
| /* AC-3/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) { |
| /* AC-3 */ |
| put_byte(ctx->pb, nb_frames); |
| put_be16(ctx->pb, trailer_size+1); |
| } |
| } |
| |
| /* output data */ |
| assert(payload_size - stuffing_size <= av_fifo_size(&stream->fifo)); |
| av_fifo_generic_read(&stream->fifo, payload_size - stuffing_size, &put_buffer, ctx->pb); |
| 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=0, 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; |
| |
| if (av_fifo_realloc2(&stream->fifo, av_fifo_size(&stream->fifo) + size) < 0) |
| return -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; |
| } |
| } |
| |
| av_fifo_generic_write(&stream->fifo, buf, size, NULL); |
| |
| 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; |
| } |
| |
| #if CONFIG_MPEG1SYSTEM_MUXER |
| AVOutputFormat mpeg1system_muxer = { |
| "mpeg", |
| NULL_IF_CONFIG_SMALL("MPEG-1 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 |
| #if CONFIG_MPEG1VCD_MUXER |
| AVOutputFormat mpeg1vcd_muxer = { |
| "vcd", |
| NULL_IF_CONFIG_SMALL("MPEG-1 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 |
| #if CONFIG_MPEG2VOB_MUXER |
| AVOutputFormat mpeg2vob_muxer = { |
| "vob", |
| NULL_IF_CONFIG_SMALL("MPEG-2 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 */ |
| #if CONFIG_MPEG2SVCD_MUXER |
| AVOutputFormat mpeg2svcd_muxer = { |
| "svcd", |
| NULL_IF_CONFIG_SMALL("MPEG-2 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 */ |
| #if CONFIG_MPEG2DVD_MUXER |
| AVOutputFormat mpeg2dvd_muxer = { |
| "dvd", |
| NULL_IF_CONFIG_SMALL("MPEG-2 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 |
