| /* |
| * 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 <stdint.h> |
| |
| #include "libavutil/attributes.h" |
| #include "libavutil/fifo.h" |
| #include "libavutil/log.h" |
| #include "libavutil/mathematics.h" |
| #include "libavutil/opt.h" |
| |
| #include "libavcodec/put_bits.h" |
| |
| #include "avformat.h" |
| #include "internal.h" |
| #include "mpeg.h" |
| |
| #define MAX_PAYLOAD_SIZE 4096 |
| |
| typedef struct PacketDesc { |
| int64_t pts; |
| int64_t dts; |
| int size; |
| int unwritten_size; |
| struct PacketDesc *next; |
| } PacketDesc; |
| |
| typedef struct StreamInfo { |
| 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 MpegMuxContext { |
| const AVClass *class; |
| 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 user_mux_rate; /* bitrate in units of bits/s */ |
| 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 */ |
| |
| int64_t vcd_padding_bitrate_num; |
| int64_t vcd_padding_bytes_written; |
| |
| int preload; |
| } MpegMuxContext; |
| |
| extern AVOutputFormat ff_mpeg1vcd_muxer; |
| extern AVOutputFormat ff_mpeg2dvd_muxer; |
| extern AVOutputFormat ff_mpeg2svcd_muxer; |
| extern AVOutputFormat ff_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_bits32(&pb, 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 put_bits_ptr(&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_bits32(&pb, SYSTEM_HEADER_START_CODE); |
| put_bits(&pb, 16, 0); |
| put_bits(&pb, 1, 1); |
| |
| /* maximum bit rate of the multiplexed stream */ |
| put_bits(&pb, 22, s->mux_rate); |
| 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 & 0xe0) == 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 = put_bits_ptr(&pb) - pb.buf; |
| /* patch packet size */ |
| AV_WB16(buf + 4, size - 6); |
| |
| 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 av_cold int mpeg_mux_init(AVFormatContext *ctx) |
| { |
| MpegMuxContext *s = ctx->priv_data; |
| int bitrate, i, mpa_id, mpv_id, h264_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 == &ff_mpeg1vcd_muxer); |
| s->is_svcd = (CONFIG_MPEG2SVCD_MUXER && ctx->oformat == &ff_mpeg2svcd_muxer); |
| s->is_mpeg2 = ((CONFIG_MPEG2VOB_MUXER && ctx->oformat == &ff_mpeg2vob_muxer) || |
| (CONFIG_MPEG2DVD_MUXER && ctx->oformat == &ff_mpeg2dvd_muxer) || |
| (CONFIG_MPEG2SVCD_MUXER && ctx->oformat == &ff_mpeg2svcd_muxer)); |
| s->is_dvd = (CONFIG_MPEG2DVD_MUXER && ctx->oformat == &ff_mpeg2dvd_muxer); |
| |
| if (ctx->packet_size) { |
| if (ctx->packet_size < 20 || ctx->packet_size > (1 << 23) + 10) { |
| av_log(ctx, AV_LOG_ERROR, "Invalid packet size %d\n", |
| ctx->packet_size); |
| goto fail; |
| } |
| s->packet_size = ctx->packet_size; |
| } else |
| s->packet_size = 2048; |
| if (ctx->max_delay < 0) /* Not set by the caller */ |
| ctx->max_delay = AV_TIME_BASE*7/10; |
| |
| s->vcd_padding_bytes_written = 0; |
| s->vcd_padding_bitrate_num = 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; |
| h264_id = H264_ID; |
| mps_id = SUB_ID; |
| lpcm_id = LPCM_ID; |
| |
| for (i = 0; i < ctx->nb_streams; i++) { |
| AVCPBProperties *props; |
| |
| st = ctx->streams[i]; |
| stream = av_mallocz(sizeof(StreamInfo)); |
| if (!stream) |
| goto fail; |
| st->priv_data = stream; |
| |
| avpriv_set_pts_info(st, 64, 1, 90000); |
| |
| switch (st->codec->codec_type) { |
| case AVMEDIA_TYPE_AUDIO: |
| if (!s->is_mpeg2 && |
| (st->codec->codec_id == AV_CODEC_ID_AC3 || |
| st->codec->codec_id == AV_CODEC_ID_DTS || |
| st->codec->codec_id == AV_CODEC_ID_PCM_S16BE)) |
| av_log(ctx, AV_LOG_WARNING, |
| "%s in MPEG-1 system streams is not widely supported, " |
| "consider using the vob or the dvd muxer " |
| "to force a MPEG-2 program stream.\n", |
| avcodec_get_name(st->codec->codec_id)); |
| if (st->codec->codec_id == AV_CODEC_ID_AC3) { |
| stream->id = ac3_id++; |
| } else if (st->codec->codec_id == AV_CODEC_ID_DTS) { |
| stream->id = dts_id++; |
| } else if (st->codec->codec_id == AV_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 AVMEDIA_TYPE_VIDEO: |
| if (st->codec->codec_id == AV_CODEC_ID_H264) |
| stream->id = h264_id++; |
| else |
| stream->id = mpv_id++; |
| |
| props = (AVCPBProperties*)av_stream_get_side_data(st, AV_PKT_DATA_CPB_PROPERTIES, NULL); |
| if (props && props->buffer_size) |
| stream->max_buffer_size = 6 * 1024 + props->buffer_size / 8; |
| else { |
| av_log(ctx, AV_LOG_WARNING, |
| "VBV buffer size not set, using default size of 130KB\n" |
| "If you want the mpeg file to be compliant to some specification\n" |
| "Like DVD, VCD or others, make sure you set the correct buffer size\n"); |
| // FIXME: this is probably too small as default |
| stream->max_buffer_size = 230 * 1024; |
| } |
| if (stream->max_buffer_size > 1024 * 8191) { |
| av_log(ctx, AV_LOG_WARNING, "buffer size %d, too large\n", stream->max_buffer_size); |
| stream->max_buffer_size = 1024 * 8191; |
| } |
| s->video_bound++; |
| break; |
| case AVMEDIA_TYPE_SUBTITLE: |
| stream->id = mps_id++; |
| stream->max_buffer_size = 16 * 1024; |
| break; |
| default: |
| av_log(ctx, AV_LOG_ERROR, "Invalid media type %s for output stream #%d\n", |
| av_get_media_type_string(st->codec->codec_type), i); |
| return AVERROR(EINVAL); |
| } |
| stream->fifo = av_fifo_alloc(16); |
| if (!stream->fifo) |
| goto fail; |
| } |
| bitrate = 0; |
| audio_bitrate = 0; |
| video_bitrate = 0; |
| for (i = 0; i < ctx->nb_streams; i++) { |
| AVCPBProperties *props; |
| int codec_rate; |
| st = ctx->streams[i]; |
| stream = (StreamInfo *)st->priv_data; |
| |
| props = (AVCPBProperties*)av_stream_get_side_data(st, AV_PKT_DATA_CPB_PROPERTIES, NULL); |
| if (props) |
| codec_rate = props->max_bitrate; |
| 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 & 0xe0) == AUDIO_ID) |
| audio_bitrate += codec_rate; |
| else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) |
| video_bitrate += codec_rate; |
| } |
| |
| if (s->user_mux_rate) { |
| s->mux_rate = (s->user_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 / 20; |
| bitrate += 10000; |
| s->mux_rate = (bitrate + (8 * 50) - 1) / (8 * 50); |
| if (s->mux_rate >= (1<<22)) { |
| av_log(ctx, AV_LOG_WARNING, "mux rate %d is too large\n", s->mux_rate); |
| s->mux_rate = (1<<22) - 1; |
| } |
| } |
| |
| if (s->is_vcd) { |
| int64_t 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 * 2294LL * (2324 - 2279); |
| overhead_rate += video_bitrate * 2279LL * (2324 - 2294); |
| |
| /* Add padding so that the full bitrate is 2324*75 bytes/sec */ |
| s->vcd_padding_bitrate_num = (2324LL * 75 * 8 - bitrate) * 2279 * 2294 - overhead_rate; |
| #define VCD_PADDING_BITRATE_DEN (2279 * 2294) |
| } |
| |
| 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 = AV_NOPTS_VALUE; |
| return 0; |
| |
| fail: |
| for (i = 0; i < ctx->nb_streams; i++) |
| av_freep(&ctx->streams[i]->priv_data); |
| return AVERROR(ENOMEM); |
| } |
| |
| static inline void put_timestamp(AVIOContext *pb, int id, int64_t timestamp) |
| { |
| avio_w8(pb, (id << 4) | (((timestamp >> 30) & 0x07) << 1) | 1); |
| avio_wb16(pb, (uint16_t)((((timestamp >> 15) & 0x7fff) << 1) | 1)); |
| avio_wb16(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_num > 0 && pts != AV_NOPTS_VALUE) { |
| int64_t full_pad_bytes; |
| |
| // FIXME: this is wrong |
| full_pad_bytes = |
| av_rescale(s->vcd_padding_bitrate_num, pts, 90000LL * 8 * VCD_PADDING_BITRATE_DEN); |
| 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; |
| } |
| |
| /* Write an MPEG padding packet header. */ |
| static void put_padding_packet(AVFormatContext *ctx, AVIOContext *pb, |
| int packet_bytes) |
| { |
| MpegMuxContext *s = ctx->priv_data; |
| int i; |
| |
| avio_wb32(pb, PADDING_STREAM); |
| avio_wb16(pb, packet_bytes - 6); |
| if (!s->is_mpeg2) { |
| avio_w8(pb, 0x0f); |
| packet_bytes -= 7; |
| } else |
| packet_bytes -= 6; |
| |
| for (i = 0; i < packet_bytes; i++) |
| avio_w8(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; |
| /* "general" pack without data specific to one stream? */ |
| int general_pack = 0; |
| int nb_frames; |
| |
| id = stream->id; |
| |
| av_log(ctx, AV_LOG_TRACE, "packet ID=%2x PTS=%0.3f\n", id, pts / 90000.0); |
| |
| 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; |
| avio_write(ctx->pb, buffer, size); |
| |
| avio_wb32(ctx->pb, PRIVATE_STREAM_2); |
| avio_wb16(ctx->pb, 0x03d4); // length |
| avio_w8(ctx->pb, 0x00); // substream ID, 00=PCI |
| for (i = 0; i < 979; i++) |
| avio_w8(ctx->pb, 0x00); |
| |
| avio_wb32(ctx->pb, PRIVATE_STREAM_2); |
| avio_wb16(ctx->pb, 0x03fa); // length |
| avio_w8(ctx->pb, 0x01); // substream ID, 01=DSI |
| for (i = 0; i < 1017; i++) |
| avio_w8(ctx->pb, 0x00); |
| |
| memset(buffer, 0, 128); |
| buf_ptr = buffer; |
| s->packet_number++; |
| stream->align_iframe = 0; |
| // FIXME: rounding and first few bytes of each packet |
| scr += s->packet_size * 90000LL / |
| (s->mux_rate * 50LL); |
| 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; |
| avio_write(ctx->pb, buffer, size); |
| |
| packet_size = s->packet_size - size; |
| |
| if (s->is_vcd && (id & 0xe0) == 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) |
| /* the system header refers to both streams and no stream data */ |
| general_pack = 1; |
| 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; |
| } |
| |
| // can't use padding, so use stuffing |
| if (pad_packet_bytes > 0 && pad_packet_bytes <= 7) { |
| 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 (startcode == PRIVATE_STREAM_1 && id >= 0xa0) { |
| if (payload_size < av_fifo_size(stream->fifo)) |
| stuffing_size += payload_size % stream->lpcm_align; |
| } |
| |
| 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); |
| |
| avio_wb32(ctx->pb, startcode); |
| |
| avio_wb16(ctx->pb, packet_size); |
| |
| if (!s->is_mpeg2) |
| for (i = 0; i < stuffing_size; i++) |
| avio_w8(ctx->pb, 0xff); |
| |
| if (s->is_mpeg2) { |
| avio_w8(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; |
| |
| avio_w8(ctx->pb, pes_flags); /* flags */ |
| avio_w8(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 */ |
| avio_w8(ctx->pb, 0x10); /* flags */ |
| |
| /* P-STD buffer info */ |
| if ((id & 0xe0) == AUDIO_ID) |
| avio_wb16(ctx->pb, 0x4000 | stream->max_buffer_size / 128); |
| else |
| avio_wb16(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 { |
| avio_w8(ctx->pb, 0x0f); |
| } |
| } |
| |
| if (s->is_mpeg2) { |
| /* special stuffing byte that is always written |
| * to prevent accidental generation of start codes. */ |
| avio_w8(ctx->pb, 0xff); |
| |
| for (i = 0; i < stuffing_size; i++) |
| avio_w8(ctx->pb, 0xff); |
| } |
| |
| if (startcode == PRIVATE_STREAM_1) { |
| avio_w8(ctx->pb, id); |
| if (id >= 0xa0) { |
| /* LPCM (XXX: check nb_frames) */ |
| avio_w8(ctx->pb, 7); |
| avio_wb16(ctx->pb, 4); /* skip 3 header bytes */ |
| avio_w8(ctx->pb, stream->lpcm_header[0]); |
| avio_w8(ctx->pb, stream->lpcm_header[1]); |
| avio_w8(ctx->pb, stream->lpcm_header[2]); |
| } else if (id >= 0x40) { |
| /* AC-3 */ |
| avio_w8(ctx->pb, nb_frames); |
| avio_wb16(ctx->pb, trailer_size + 1); |
| } |
| } |
| |
| /* output data */ |
| av_assert0(payload_size - stuffing_size <= av_fifo_size(stream->fifo)); |
| av_fifo_generic_read(stream->fifo, ctx->pb, |
| payload_size - stuffing_size, |
| (void (*)(void*, void*, int))avio_write); |
| 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++) |
| avio_w8(ctx->pb, 0x00); |
| |
| avio_flush(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++) |
| avio_w8(ctx->pb, 0); |
| |
| s->vcd_padding_bytes_written += s->packet_size; |
| |
| avio_flush(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++; |
| } |
| |
| static int remove_decoded_packets(AVFormatContext *ctx, int64_t scr) |
| { |
| 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 st=%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; |
| int ignore_delay = 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 = 1024LL * 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 != AVMEDIA_TYPE_SUBTITLE) |
| return 0; |
| if (avail_data == 0) |
| continue; |
| av_assert0(avail_data > 0); |
| |
| if (space < s->packet_size && !ignore_constraints) |
| continue; |
| |
| if (next_pkt && next_pkt->dts - scr > max_delay && !ignore_delay) |
| continue; |
| if ( stream->predecode_packet |
| && stream->predecode_packet->size > stream->buffer_index) |
| rel_space += 1<<28; |
| 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; |
| int has_premux = 0; |
| |
| 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; |
| has_premux |= !!stream->premux_packet; |
| } |
| |
| if (best_dts < INT64_MAX) { |
| av_log(ctx, AV_LOG_TRACE, "bumping scr, scr:%f, dts:%f\n", |
| scr / 90000.0, best_dts / 90000.0); |
| |
| 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; |
| } else if (has_premux && flush) { |
| av_log(ctx, AV_LOG_ERROR, |
| "delay too large, ignoring ...\n"); |
| ignore_delay = 1; |
| ignore_constraints = 1; |
| } else |
| return 0; |
| |
| goto retry; |
| } |
| |
| av_assert0(best_i >= 0); |
| |
| st = ctx->streams[best_i]; |
| stream = st->priv_data; |
| |
| av_assert0(av_fifo_size(stream->fifo) > 0); |
| |
| av_assert0(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_TRACE, "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 { |
| av_assert0(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; |
| |
| // FIXME: pts cannot be correct here |
| while ((vcd_pad_bytes = get_vcd_padding_size(ctx, stream->premux_packet->pts)) >= s->packet_size) { |
| put_vcd_padding_sector(ctx); |
| // FIXME: rounding and first few bytes of each packet |
| s->last_scr += s->packet_size * 90000LL / (s->mux_rate * 50LL); |
| } |
| } |
| |
| stream->buffer_index += es_size; |
| // FIXME: rounding and first few bytes of each packet |
| s->last_scr += s->packet_size * 90000LL / (s->mux_rate * 50LL); |
| |
| 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) { |
| av_assert0(stream->premux_packet); |
| 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) |
| { |
| int stream_index = pkt->stream_index; |
| int size = pkt->size; |
| uint8_t *buf = pkt->data; |
| MpegMuxContext *s = ctx->priv_data; |
| AVStream *st = ctx->streams[stream_index]; |
| StreamInfo *stream = st->priv_data; |
| int64_t pts, dts; |
| PacketDesc *pkt_desc; |
| int preload; |
| const int is_iframe = st->codec->codec_type == AVMEDIA_TYPE_VIDEO && |
| (pkt->flags & AV_PKT_FLAG_KEY); |
| |
| preload = av_rescale(s->preload, 90000, AV_TIME_BASE); |
| |
| pts = pkt->pts; |
| dts = pkt->dts; |
| |
| if (s->last_scr == AV_NOPTS_VALUE) { |
| if (dts == AV_NOPTS_VALUE || (dts < preload && ctx->avoid_negative_ts) || s->is_dvd) { |
| if (dts != AV_NOPTS_VALUE) |
| s->preload += av_rescale(-dts, AV_TIME_BASE, 90000); |
| s->last_scr = 0; |
| } else { |
| s->last_scr = dts - preload; |
| s->preload = 0; |
| } |
| preload = av_rescale(s->preload, 90000, AV_TIME_BASE); |
| av_log(ctx, AV_LOG_DEBUG, "First SCR: %"PRId64" First DTS: %"PRId64"\n", s->last_scr, dts + preload); |
| } |
| |
| if (dts != AV_NOPTS_VALUE) dts += preload; |
| if (pts != AV_NOPTS_VALUE) pts += preload; |
| |
| av_log(ctx, AV_LOG_TRACE, "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) { |
| // min VOBU length 0.4 seconds (mpucoder) |
| if (is_iframe && |
| (s->packet_number == 0 || |
| (pts - stream->vobu_start_pts >= 36000))) { |
| 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) |
| { |
| 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. */ |
| // avio_wb32(ctx->pb, ISO_11172_END_CODE); |
| // avio_flush(ctx->pb); |
| |
| for (i = 0; i < ctx->nb_streams; i++) { |
| stream = ctx->streams[i]->priv_data; |
| |
| av_assert0(av_fifo_size(stream->fifo) == 0); |
| av_fifo_freep(&stream->fifo); |
| } |
| return 0; |
| } |
| |
| #define OFFSET(x) offsetof(MpegMuxContext, x) |
| #define E AV_OPT_FLAG_ENCODING_PARAM |
| static const AVOption options[] = { |
| { "muxrate", NULL, OFFSET(user_mux_rate), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, ((1<<22) - 1) * (8 * 50), E }, |
| { "preload", "Initial demux-decode delay in microseconds.", OFFSET(preload), AV_OPT_TYPE_INT, { .i64 = 500000 }, 0, INT_MAX, E }, |
| { NULL }, |
| }; |
| |
| #define MPEGENC_CLASS(flavor) \ |
| static const AVClass flavor ## _class = { \ |
| .class_name = #flavor " muxer", \ |
| .item_name = av_default_item_name, \ |
| .version = LIBAVUTIL_VERSION_INT, \ |
| .option = options, \ |
| }; |
| |
| #if CONFIG_MPEG1SYSTEM_MUXER |
| MPEGENC_CLASS(mpeg) |
| AVOutputFormat ff_mpeg1system_muxer = { |
| .name = "mpeg", |
| .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 Systems / MPEG program stream"), |
| .mime_type = "video/mpeg", |
| .extensions = "mpg,mpeg", |
| .priv_data_size = sizeof(MpegMuxContext), |
| .audio_codec = AV_CODEC_ID_MP2, |
| .video_codec = AV_CODEC_ID_MPEG1VIDEO, |
| .write_header = mpeg_mux_init, |
| .write_packet = mpeg_mux_write_packet, |
| .write_trailer = mpeg_mux_end, |
| .priv_class = &mpeg_class, |
| }; |
| #endif |
| |
| #if CONFIG_MPEG1VCD_MUXER |
| MPEGENC_CLASS(vcd) |
| AVOutputFormat ff_mpeg1vcd_muxer = { |
| .name = "vcd", |
| .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 Systems / MPEG program stream (VCD)"), |
| .mime_type = "video/mpeg", |
| .priv_data_size = sizeof(MpegMuxContext), |
| .audio_codec = AV_CODEC_ID_MP2, |
| .video_codec = AV_CODEC_ID_MPEG1VIDEO, |
| .write_header = mpeg_mux_init, |
| .write_packet = mpeg_mux_write_packet, |
| .write_trailer = mpeg_mux_end, |
| .priv_class = &vcd_class, |
| }; |
| #endif |
| |
| #if CONFIG_MPEG2VOB_MUXER |
| MPEGENC_CLASS(vob) |
| AVOutputFormat ff_mpeg2vob_muxer = { |
| .name = "vob", |
| .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 PS (VOB)"), |
| .mime_type = "video/mpeg", |
| .extensions = "vob", |
| .priv_data_size = sizeof(MpegMuxContext), |
| .audio_codec = AV_CODEC_ID_MP2, |
| .video_codec = AV_CODEC_ID_MPEG2VIDEO, |
| .write_header = mpeg_mux_init, |
| .write_packet = mpeg_mux_write_packet, |
| .write_trailer = mpeg_mux_end, |
| .priv_class = &vob_class, |
| }; |
| #endif |
| |
| /* Same as mpeg2vob_mux except that the pack size is 2324 */ |
| #if CONFIG_MPEG2SVCD_MUXER |
| MPEGENC_CLASS(svcd) |
| AVOutputFormat ff_mpeg2svcd_muxer = { |
| .name = "svcd", |
| .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 PS (SVCD)"), |
| .mime_type = "video/mpeg", |
| .extensions = "vob", |
| .priv_data_size = sizeof(MpegMuxContext), |
| .audio_codec = AV_CODEC_ID_MP2, |
| .video_codec = AV_CODEC_ID_MPEG2VIDEO, |
| .write_header = mpeg_mux_init, |
| .write_packet = mpeg_mux_write_packet, |
| .write_trailer = mpeg_mux_end, |
| .priv_class = &svcd_class, |
| }; |
| #endif |
| |
| /* Same as mpeg2vob_mux except the 'is_dvd' flag is set to produce NAV pkts */ |
| #if CONFIG_MPEG2DVD_MUXER |
| MPEGENC_CLASS(dvd) |
| AVOutputFormat ff_mpeg2dvd_muxer = { |
| .name = "dvd", |
| .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 PS (DVD VOB)"), |
| .mime_type = "video/mpeg", |
| .extensions = "dvd", |
| .priv_data_size = sizeof(MpegMuxContext), |
| .audio_codec = AV_CODEC_ID_MP2, |
| .video_codec = AV_CODEC_ID_MPEG2VIDEO, |
| .write_header = mpeg_mux_init, |
| .write_packet = mpeg_mux_write_packet, |
| .write_trailer = mpeg_mux_end, |
| .priv_class = &dvd_class, |
| }; |
| #endif |
