yading@11: /*
yading@11:  * GXF muxer.
yading@11:  * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: #include "libavutil/avassert.h"
yading@11: #include "libavutil/intfloat.h"
yading@11: #include "libavutil/opt.h"
yading@11: #include "libavutil/mathematics.h"
yading@11: #include "libavutil/timecode.h"
yading@11: #include "avformat.h"
yading@11: #include "internal.h"
yading@11: #include "gxf.h"
yading@11: #include "audiointerleave.h"
yading@11: 
yading@11: #define GXF_AUDIO_PACKET_SIZE 65536
yading@11: 
yading@11: #define GXF_TIMECODE(c, d, h, m, s, f) \
yading@11:     ((c) << 30 | (d) << 29 | (h) << 24 | (m) << 16 | (s) << 8 | (f))
yading@11: 
yading@11: typedef struct GXFTimecode{
yading@11:     int hh;
yading@11:     int mm;
yading@11:     int ss;
yading@11:     int ff;
yading@11:     int color;
yading@11:     int drop;
yading@11: } GXFTimecode;
yading@11: 
yading@11: typedef struct GXFStreamContext {
yading@11:     AudioInterleaveContext aic;
yading@11:     uint32_t track_type;
yading@11:     uint32_t sample_size;
yading@11:     uint32_t sample_rate;
yading@11:     uint16_t media_type;
yading@11:     uint16_t media_info;
yading@11:     int frame_rate_index;
yading@11:     int lines_index;
yading@11:     int fields;
yading@11:     int iframes;
yading@11:     int pframes;
yading@11:     int bframes;
yading@11:     int p_per_gop;
yading@11:     int b_per_i_or_p; ///< number of B frames per I frame or P frame
yading@11:     int first_gop_closed;
yading@11:     unsigned order;   ///< interleaving order
yading@11: } GXFStreamContext;
yading@11: 
yading@11: typedef struct GXFContext {
yading@11:     AVClass *av_class;
yading@11:     uint32_t nb_fields;
yading@11:     uint16_t audio_tracks;
yading@11:     uint16_t mpeg_tracks;
yading@11:     int64_t creation_time;
yading@11:     uint32_t umf_start_offset;
yading@11:     uint32_t umf_track_offset;
yading@11:     uint32_t umf_media_offset;
yading@11:     uint32_t umf_length;
yading@11:     uint16_t umf_track_size;
yading@11:     uint16_t umf_media_size;
yading@11:     AVRational time_base;
yading@11:     int flags;
yading@11:     GXFStreamContext timecode_track;
yading@11:     unsigned *flt_entries;    ///< offsets of packets /1024, starts after 2nd video field
yading@11:     unsigned flt_entries_nb;
yading@11:     uint64_t *map_offsets;    ///< offset of map packets
yading@11:     unsigned map_offsets_nb;
yading@11:     unsigned packet_count;
yading@11:     GXFTimecode tc;
yading@11: } GXFContext;
yading@11: 
yading@11: static const struct {
yading@11:     int height, index;
yading@11: } gxf_lines_tab[] = {
yading@11:     { 480,  1 }, /* NTSC */
yading@11:     { 512,  1 }, /* NTSC + VBI */
yading@11:     { 576,  2 }, /* PAL */
yading@11:     { 608,  2 }, /* PAL + VBI */
yading@11:     { 1080, 4 },
yading@11:     { 720,  6 },
yading@11: };
yading@11: 
yading@11: static const AVCodecTag gxf_media_types[] = {
yading@11:     { AV_CODEC_ID_MJPEG     ,   3 }, /* NTSC */
yading@11:     { AV_CODEC_ID_MJPEG     ,   4 }, /* PAL */
yading@11:     { AV_CODEC_ID_PCM_S24LE ,   9 },
yading@11:     { AV_CODEC_ID_PCM_S16LE ,  10 },
yading@11:     { AV_CODEC_ID_MPEG2VIDEO,  11 }, /* NTSC */
yading@11:     { AV_CODEC_ID_MPEG2VIDEO,  12 }, /* PAL */
yading@11:     { AV_CODEC_ID_DVVIDEO   ,  13 }, /* NTSC */
yading@11:     { AV_CODEC_ID_DVVIDEO   ,  14 }, /* PAL */
yading@11:     { AV_CODEC_ID_DVVIDEO   ,  15 }, /* 50M NTSC */
yading@11:     { AV_CODEC_ID_DVVIDEO   ,  16 }, /* 50M PAL */
yading@11:     { AV_CODEC_ID_AC3       ,  17 },
yading@11:     //{ AV_CODEC_ID_NONE,  ,   18 }, /* Non compressed 24 bit audio */
yading@11:     { AV_CODEC_ID_MPEG2VIDEO,  20 }, /* MPEG HD */
yading@11:     { AV_CODEC_ID_MPEG1VIDEO,  22 }, /* NTSC */
yading@11:     { AV_CODEC_ID_MPEG1VIDEO,  23 }, /* PAL */
yading@11:     { AV_CODEC_ID_NONE,         0 },
yading@11: };
yading@11: 
yading@11: #define SERVER_PATH "EXT:/PDR/default/"
yading@11: #define ES_NAME_PATTERN "EXT:/PDR/default/ES."
yading@11: 
yading@11: static int gxf_find_lines_index(AVStream *st)
yading@11: {
yading@11:     GXFStreamContext *sc = st->priv_data;
yading@11:     int i;
yading@11: 
yading@11:     for (i = 0; i < 6; ++i) {
yading@11:         if (st->codec->height == gxf_lines_tab[i].height) {
yading@11:             sc->lines_index = gxf_lines_tab[i].index;
yading@11:             return 0;
yading@11:         }
yading@11:     }
yading@11:     return -1;
yading@11: }
yading@11: 
yading@11: static void gxf_write_padding(AVIOContext *pb, int64_t to_pad)
yading@11: {
yading@11:     for (; to_pad > 0; to_pad--) {
yading@11:         avio_w8(pb, 0);
yading@11:     }
yading@11: }
yading@11: 
yading@11: static int64_t updatePacketSize(AVIOContext *pb, int64_t pos)
yading@11: {
yading@11:     int64_t curpos;
yading@11:     int size;
yading@11: 
yading@11:     size = avio_tell(pb) - pos;
yading@11:     if (size % 4) {
yading@11:         gxf_write_padding(pb, 4 - size % 4);
yading@11:         size = avio_tell(pb) - pos;
yading@11:     }
yading@11:     curpos = avio_tell(pb);
yading@11:     avio_seek(pb, pos + 6, SEEK_SET);
yading@11:     avio_wb32(pb, size);
yading@11:     avio_seek(pb, curpos, SEEK_SET);
yading@11:     return curpos - pos;
yading@11: }
yading@11: 
yading@11: static int64_t updateSize(AVIOContext *pb, int64_t pos)
yading@11: {
yading@11:     int64_t curpos;
yading@11: 
yading@11:     curpos = avio_tell(pb);
yading@11:     avio_seek(pb, pos, SEEK_SET);
yading@11:     avio_wb16(pb, curpos - pos - 2);
yading@11:     avio_seek(pb, curpos, SEEK_SET);
yading@11:     return curpos - pos;
yading@11: }
yading@11: 
yading@11: static void gxf_write_packet_header(AVIOContext *pb, GXFPktType type)
yading@11: {
yading@11:     avio_wb32(pb, 0);  /* packet leader for synchro */
yading@11:     avio_w8(pb, 1);
yading@11:     avio_w8(pb, type); /* map packet */
yading@11:     avio_wb32(pb, 0);  /* size */
yading@11:     avio_wb32(pb, 0);  /* reserved */
yading@11:     avio_w8(pb, 0xE1); /* trailer 1 */
yading@11:     avio_w8(pb, 0xE2); /* trailer 2 */
yading@11: }
yading@11: 
yading@11: static int gxf_write_mpeg_auxiliary(AVIOContext *pb, AVStream *st)
yading@11: {
yading@11:     GXFStreamContext *sc = st->priv_data;
yading@11:     char buffer[1024];
yading@11:     int size, starting_line;
yading@11: 
yading@11:     if (sc->iframes) {
yading@11:         sc->p_per_gop = sc->pframes / sc->iframes;
yading@11:         if (sc->pframes % sc->iframes)
yading@11:             sc->p_per_gop++;
yading@11:         if (sc->pframes) {
yading@11:             sc->b_per_i_or_p = sc->bframes / sc->pframes;
yading@11:             if (sc->bframes % sc->pframes)
yading@11:                 sc->b_per_i_or_p++;
yading@11:         }
yading@11:         if (sc->p_per_gop > 9)
yading@11:             sc->p_per_gop = 9; /* ensure value won't take more than one char */
yading@11:         if (sc->b_per_i_or_p > 9)
yading@11:             sc->b_per_i_or_p = 9; /* ensure value won't take more than one char */
yading@11:     }
yading@11:     if (st->codec->height == 512 || st->codec->height == 608)
yading@11:         starting_line = 7; // VBI
yading@11:     else if (st->codec->height == 480)
yading@11:         starting_line = 20;
yading@11:     else
yading@11:         starting_line = 23; // default PAL
yading@11: 
yading@11:     size = snprintf(buffer, sizeof(buffer), "Ver 1\nBr %.6f\nIpg 1\nPpi %d\nBpiop %d\n"
yading@11:                     "Pix 0\nCf %d\nCg %d\nSl %d\nnl16 %d\nVi 1\nf1 1\n",
yading@11:                     (float)st->codec->bit_rate, sc->p_per_gop, sc->b_per_i_or_p,
yading@11:                     st->codec->pix_fmt == AV_PIX_FMT_YUV422P ? 2 : 1, sc->first_gop_closed == 1,
yading@11:                     starting_line, (st->codec->height + 15) / 16);
yading@11:     av_assert0(size < sizeof(buffer));
yading@11:     avio_w8(pb, TRACK_MPG_AUX);
yading@11:     avio_w8(pb, size + 1);
yading@11:     avio_write(pb, (uint8_t *)buffer, size + 1);
yading@11:     return size + 3;
yading@11: }
yading@11: 
yading@11: static int gxf_write_timecode_auxiliary(AVIOContext *pb, GXFContext *gxf)
yading@11: {
yading@11:     uint32_t timecode = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
yading@11:                                      gxf->tc.hh, gxf->tc.mm,
yading@11:                                      gxf->tc.ss, gxf->tc.ff);
yading@11: 
yading@11:     avio_wl32(pb, timecode);
yading@11:     /* reserved */
yading@11:     avio_wl32(pb, 0);
yading@11:     return 8;
yading@11: }
yading@11: 
yading@11: static int gxf_write_track_description(AVFormatContext *s, GXFStreamContext *sc, int index)
yading@11: {
yading@11:     GXFContext *gxf = s->priv_data;
yading@11:     AVIOContext *pb = s->pb;
yading@11:     int64_t pos;
yading@11:     int mpeg = sc->track_type == 4 || sc->track_type == 9;
yading@11: 
yading@11:     /* track description section */
yading@11:     avio_w8(pb, sc->media_type + 0x80);
yading@11:     avio_w8(pb, index + 0xC0);
yading@11: 
yading@11:     pos = avio_tell(pb);
yading@11:     avio_wb16(pb, 0); /* size */
yading@11: 
yading@11:     /* media file name */
yading@11:     avio_w8(pb, TRACK_NAME);
yading@11:     avio_w8(pb, strlen(ES_NAME_PATTERN) + 3);
yading@11:     avio_write(pb, ES_NAME_PATTERN, sizeof(ES_NAME_PATTERN) - 1);
yading@11:     avio_wb16(pb, sc->media_info);
yading@11:     avio_w8(pb, 0);
yading@11: 
yading@11:     if (!mpeg) {
yading@11:         /* auxiliary information */
yading@11:         avio_w8(pb, TRACK_AUX);
yading@11:         avio_w8(pb, 8);
yading@11:         if (sc->track_type == 3)
yading@11:             gxf_write_timecode_auxiliary(pb, gxf);
yading@11:         else
yading@11:             avio_wl64(pb, 0);
yading@11:     }
yading@11: 
yading@11:     /* file system version */
yading@11:     avio_w8(pb, TRACK_VER);
yading@11:     avio_w8(pb, 4);
yading@11:     avio_wb32(pb, 0);
yading@11: 
yading@11:     if (mpeg)
yading@11:         gxf_write_mpeg_auxiliary(pb, s->streams[index]);
yading@11: 
yading@11:     /* frame rate */
yading@11:     avio_w8(pb, TRACK_FPS);
yading@11:     avio_w8(pb, 4);
yading@11:     avio_wb32(pb, sc->frame_rate_index);
yading@11: 
yading@11:     /* lines per frame */
yading@11:     avio_w8(pb, TRACK_LINES);
yading@11:     avio_w8(pb, 4);
yading@11:     avio_wb32(pb, sc->lines_index);
yading@11: 
yading@11:     /* fields per frame */
yading@11:     avio_w8(pb, TRACK_FPF);
yading@11:     avio_w8(pb, 4);
yading@11:     avio_wb32(pb, sc->fields);
yading@11: 
yading@11:     return updateSize(pb, pos);
yading@11: }
yading@11: 
yading@11: static int gxf_write_material_data_section(AVFormatContext *s)
yading@11: {
yading@11:     GXFContext *gxf = s->priv_data;
yading@11:     AVIOContext *pb = s->pb;
yading@11:     int64_t pos;
yading@11:     int len;
yading@11:     const char *filename = strrchr(s->filename, '/');
yading@11: 
yading@11:     pos = avio_tell(pb);
yading@11:     avio_wb16(pb, 0); /* size */
yading@11: 
yading@11:     /* name */
yading@11:     if (filename)
yading@11:         filename++;
yading@11:     else
yading@11:         filename = s->filename;
yading@11:     len = strlen(filename);
yading@11: 
yading@11:     avio_w8(pb, MAT_NAME);
yading@11:     avio_w8(pb, strlen(SERVER_PATH) + len + 1);
yading@11:     avio_write(pb, SERVER_PATH, sizeof(SERVER_PATH) - 1);
yading@11:     avio_write(pb, filename, len);
yading@11:     avio_w8(pb, 0);
yading@11: 
yading@11:     /* first field */
yading@11:     avio_w8(pb, MAT_FIRST_FIELD);
yading@11:     avio_w8(pb, 4);
yading@11:     avio_wb32(pb, 0);
yading@11: 
yading@11:     /* last field */
yading@11:     avio_w8(pb, MAT_LAST_FIELD);
yading@11:     avio_w8(pb, 4);
yading@11:     avio_wb32(pb, gxf->nb_fields);
yading@11: 
yading@11:     /* reserved */
yading@11:     avio_w8(pb, MAT_MARK_IN);
yading@11:     avio_w8(pb, 4);
yading@11:     avio_wb32(pb, 0);
yading@11: 
yading@11:     avio_w8(pb, MAT_MARK_OUT);
yading@11:     avio_w8(pb, 4);
yading@11:     avio_wb32(pb, gxf->nb_fields);
yading@11: 
yading@11:     /* estimated size */
yading@11:     avio_w8(pb, MAT_SIZE);
yading@11:     avio_w8(pb, 4);
yading@11:     avio_wb32(pb, avio_size(pb) / 1024);
yading@11: 
yading@11:     return updateSize(pb, pos);
yading@11: }
yading@11: 
yading@11: static int gxf_write_track_description_section(AVFormatContext *s)
yading@11: {
yading@11:     GXFContext *gxf = s->priv_data;
yading@11:     AVIOContext *pb = s->pb;
yading@11:     int64_t pos;
yading@11:     int i;
yading@11: 
yading@11:     pos = avio_tell(pb);
yading@11:     avio_wb16(pb, 0); /* size */
yading@11:     for (i = 0; i < s->nb_streams; ++i)
yading@11:         gxf_write_track_description(s, s->streams[i]->priv_data, i);
yading@11: 
yading@11:     gxf_write_track_description(s, &gxf->timecode_track, s->nb_streams);
yading@11: 
yading@11:     return updateSize(pb, pos);
yading@11: }
yading@11: 
yading@11: static int gxf_write_map_packet(AVFormatContext *s, int rewrite)
yading@11: {
yading@11:     GXFContext *gxf = s->priv_data;
yading@11:     AVIOContext *pb = s->pb;
yading@11:     int64_t pos = avio_tell(pb);
yading@11: 
yading@11:     if (!rewrite) {
yading@11:         if (!(gxf->map_offsets_nb % 30)) {
yading@11:             gxf->map_offsets = av_realloc_f(gxf->map_offsets,
yading@11:                                             sizeof(*gxf->map_offsets),
yading@11:                                             gxf->map_offsets_nb+30);
yading@11:             if (!gxf->map_offsets) {
yading@11:                 av_log(s, AV_LOG_ERROR, "could not realloc map offsets\n");
yading@11:                 return -1;
yading@11:             }
yading@11:         }
yading@11:         gxf->map_offsets[gxf->map_offsets_nb++] = pos; // do not increment here
yading@11:     }
yading@11: 
yading@11:     gxf_write_packet_header(pb, PKT_MAP);
yading@11: 
yading@11:     /* preamble */
yading@11:     avio_w8(pb, 0xE0); /* version */
yading@11:     avio_w8(pb, 0xFF); /* reserved */
yading@11: 
yading@11:     gxf_write_material_data_section(s);
yading@11:     gxf_write_track_description_section(s);
yading@11: 
yading@11:     return updatePacketSize(pb, pos);
yading@11: }
yading@11: 
yading@11: static int gxf_write_flt_packet(AVFormatContext *s)
yading@11: {
yading@11:     GXFContext *gxf = s->priv_data;
yading@11:     AVIOContext *pb = s->pb;
yading@11:     int64_t pos = avio_tell(pb);
yading@11:     int fields_per_flt = (gxf->nb_fields+1) / 1000 + 1;
yading@11:     int flt_entries = gxf->nb_fields / fields_per_flt;
yading@11:     int i = 0;
yading@11: 
yading@11:     gxf_write_packet_header(pb, PKT_FLT);
yading@11: 
yading@11:     avio_wl32(pb, fields_per_flt); /* number of fields */
yading@11:     avio_wl32(pb, flt_entries); /* number of active flt entries */
yading@11: 
yading@11:     if (gxf->flt_entries) {
yading@11:         for (i = 0; i < flt_entries; i++)
yading@11:             avio_wl32(pb, gxf->flt_entries[(i*fields_per_flt)>>1]);
yading@11:     }
yading@11: 
yading@11:     for (; i < 1000; i++)
yading@11:         avio_wl32(pb, 0);
yading@11: 
yading@11:     return updatePacketSize(pb, pos);
yading@11: }
yading@11: 
yading@11: static int gxf_write_umf_material_description(AVFormatContext *s)
yading@11: {
yading@11:     GXFContext *gxf = s->priv_data;
yading@11:     AVIOContext *pb = s->pb;
yading@11:     int timecode_base = gxf->time_base.den == 60000 ? 60 : 50;
yading@11:     int64_t timestamp = 0;
yading@11:     AVDictionaryEntry *t;
yading@11:     uint64_t nb_fields;
yading@11:     uint32_t timecode_in; // timecode at mark in
yading@11:     uint32_t timecode_out; // timecode at mark out
yading@11: 
yading@11:     if (t = av_dict_get(s->metadata, "creation_time", NULL, 0))
yading@11:         timestamp = ff_iso8601_to_unix_time(t->value);
yading@11: 
yading@11:     timecode_in = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
yading@11:                                gxf->tc.hh, gxf->tc.mm,
yading@11:                                gxf->tc.ss, gxf->tc.ff);
yading@11: 
yading@11:     nb_fields = gxf->nb_fields +
yading@11:                 gxf->tc.hh * (timecode_base * 3600) +
yading@11:                 gxf->tc.mm * (timecode_base * 60)   +
yading@11:                 gxf->tc.ss * timecode_base          +
yading@11:                 gxf->tc.ff;
yading@11: 
yading@11:     timecode_out = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
yading@11:                                 nb_fields / (timecode_base * 3600) % 24,
yading@11:                                 nb_fields / (timecode_base * 60)   % 60,
yading@11:                                 nb_fields /  timecode_base % 60,
yading@11:                                 nb_fields %  timecode_base);
yading@11: 
yading@11:     avio_wl32(pb, gxf->flags);
yading@11:     avio_wl32(pb, gxf->nb_fields); /* length of the longest track */
yading@11:     avio_wl32(pb, gxf->nb_fields); /* length of the shortest track */
yading@11:     avio_wl32(pb, 0); /* mark in */
yading@11:     avio_wl32(pb, gxf->nb_fields); /* mark out */
yading@11:     avio_wl32(pb, timecode_in); /* timecode mark in */
yading@11:     avio_wl32(pb, timecode_out); /* timecode mark out */
yading@11:     avio_wl64(pb, timestamp); /* modification time */
yading@11:     avio_wl64(pb, timestamp); /* creation time */
yading@11:     avio_wl16(pb, 0); /* reserved */
yading@11:     avio_wl16(pb, 0); /* reserved */
yading@11:     avio_wl16(pb, gxf->audio_tracks);
yading@11:     avio_wl16(pb, 1); /* timecode track count */
yading@11:     avio_wl16(pb, 0); /* reserved */
yading@11:     avio_wl16(pb, gxf->mpeg_tracks);
yading@11:     return 48;
yading@11: }
yading@11: 
yading@11: static int gxf_write_umf_payload(AVFormatContext *s)
yading@11: {
yading@11:     GXFContext *gxf = s->priv_data;
yading@11:     AVIOContext *pb = s->pb;
yading@11: 
yading@11:     avio_wl32(pb, gxf->umf_length); /* total length of the umf data */
yading@11:     avio_wl32(pb, 3); /* version */
yading@11:     avio_wl32(pb, s->nb_streams+1);
yading@11:     avio_wl32(pb, gxf->umf_track_offset); /* umf track section offset */
yading@11:     avio_wl32(pb, gxf->umf_track_size);
yading@11:     avio_wl32(pb, s->nb_streams+1);
yading@11:     avio_wl32(pb, gxf->umf_media_offset);
yading@11:     avio_wl32(pb, gxf->umf_media_size);
yading@11:     avio_wl32(pb, gxf->umf_length); /* user data offset */
yading@11:     avio_wl32(pb, 0); /* user data size */
yading@11:     avio_wl32(pb, 0); /* reserved */
yading@11:     avio_wl32(pb, 0); /* reserved */
yading@11:     return 48;
yading@11: }
yading@11: 
yading@11: static int gxf_write_umf_track_description(AVFormatContext *s)
yading@11: {
yading@11:     AVIOContext *pb = s->pb;
yading@11:     GXFContext *gxf = s->priv_data;
yading@11:     int64_t pos = avio_tell(pb);
yading@11:     int i;
yading@11: 
yading@11:     gxf->umf_track_offset = pos - gxf->umf_start_offset;
yading@11:     for (i = 0; i < s->nb_streams; ++i) {
yading@11:         GXFStreamContext *sc = s->streams[i]->priv_data;
yading@11:         avio_wl16(pb, sc->media_info);
yading@11:         avio_wl16(pb, 1);
yading@11:     }
yading@11: 
yading@11:     avio_wl16(pb, gxf->timecode_track.media_info);
yading@11:     avio_wl16(pb, 1);
yading@11: 
yading@11:     return avio_tell(pb) - pos;
yading@11: }
yading@11: 
yading@11: static int gxf_write_umf_media_mpeg(AVIOContext *pb, AVStream *st)
yading@11: {
yading@11:     GXFStreamContext *sc = st->priv_data;
yading@11: 
yading@11:     if (st->codec->pix_fmt == AV_PIX_FMT_YUV422P)
yading@11:         avio_wl32(pb, 2);
yading@11:     else
yading@11:         avio_wl32(pb, 1); /* default to 420 */
yading@11:     avio_wl32(pb, sc->first_gop_closed == 1); /* closed = 1, open = 0, unknown = 255 */
yading@11:     avio_wl32(pb, 3); /* top = 1, bottom = 2, frame = 3, unknown = 0 */
yading@11:     avio_wl32(pb, 1); /* I picture per GOP */
yading@11:     avio_wl32(pb, sc->p_per_gop);
yading@11:     avio_wl32(pb, sc->b_per_i_or_p);
yading@11:     if (st->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO)
yading@11:         avio_wl32(pb, 2);
yading@11:     else if (st->codec->codec_id == AV_CODEC_ID_MPEG1VIDEO)
yading@11:         avio_wl32(pb, 1);
yading@11:     else
yading@11:         avio_wl32(pb, 0);
yading@11:     avio_wl32(pb, 0); /* reserved */
yading@11:     return 32;
yading@11: }
yading@11: 
yading@11: static int gxf_write_umf_media_timecode(AVIOContext *pb, int drop)
yading@11: {
yading@11:     avio_wl32(pb, drop); /* drop frame */
yading@11:     avio_wl32(pb, 0); /* reserved */
yading@11:     avio_wl32(pb, 0); /* reserved */
yading@11:     avio_wl32(pb, 0); /* reserved */
yading@11:     avio_wl32(pb, 0); /* reserved */
yading@11:     avio_wl32(pb, 0); /* reserved */
yading@11:     avio_wl32(pb, 0); /* reserved */
yading@11:     avio_wl32(pb, 0); /* reserved */
yading@11:     return 32;
yading@11: }
yading@11: 
yading@11: static int gxf_write_umf_media_dv(AVIOContext *pb, GXFStreamContext *sc)
yading@11: {
yading@11:     int i;
yading@11: 
yading@11:     for (i = 0; i < 8; i++) {
yading@11:         avio_wb32(pb, 0);
yading@11:     }
yading@11:     return 32;
yading@11: }
yading@11: 
yading@11: static int gxf_write_umf_media_audio(AVIOContext *pb, GXFStreamContext *sc)
yading@11: {
yading@11:     avio_wl64(pb, av_double2int(1)); /* sound level to begin to */
yading@11:     avio_wl64(pb, av_double2int(1)); /* sound level to begin to */
yading@11:     avio_wl32(pb, 0); /* number of fields over which to ramp up sound level */
yading@11:     avio_wl32(pb, 0); /* number of fields over which to ramp down sound level */
yading@11:     avio_wl32(pb, 0); /* reserved */
yading@11:     avio_wl32(pb, 0); /* reserved */
yading@11:     return 32;
yading@11: }
yading@11: 
yading@11: static int gxf_write_umf_media_description(AVFormatContext *s)
yading@11: {
yading@11:     GXFContext *gxf = s->priv_data;
yading@11:     AVIOContext *pb = s->pb;
yading@11:     int64_t pos;
yading@11:     int i, j;
yading@11: 
yading@11:     pos = avio_tell(pb);
yading@11:     gxf->umf_media_offset = pos - gxf->umf_start_offset;
yading@11:     for (i = 0; i <= s->nb_streams; ++i) {
yading@11:         GXFStreamContext *sc;
yading@11:         int64_t startpos, curpos;
yading@11: 
yading@11:         if (i == s->nb_streams)
yading@11:             sc = &gxf->timecode_track;
yading@11:         else
yading@11:             sc = s->streams[i]->priv_data;
yading@11: 
yading@11:         startpos = avio_tell(pb);
yading@11:         avio_wl16(pb, 0); /* length */
yading@11:         avio_wl16(pb, sc->media_info);
yading@11:         avio_wl16(pb, 0); /* reserved */
yading@11:         avio_wl16(pb, 0); /* reserved */
yading@11:         avio_wl32(pb, gxf->nb_fields);
yading@11:         avio_wl32(pb, 0); /* attributes rw, ro */
yading@11:         avio_wl32(pb, 0); /* mark in */
yading@11:         avio_wl32(pb, gxf->nb_fields); /* mark out */
yading@11:         avio_write(pb, ES_NAME_PATTERN, strlen(ES_NAME_PATTERN));
yading@11:         avio_wb16(pb, sc->media_info);
yading@11:         for (j = strlen(ES_NAME_PATTERN)+2; j < 88; j++)
yading@11:             avio_w8(pb, 0);
yading@11:         avio_wl32(pb, sc->track_type);
yading@11:         avio_wl32(pb, sc->sample_rate);
yading@11:         avio_wl32(pb, sc->sample_size);
yading@11:         avio_wl32(pb, 0); /* reserved */
yading@11: 
yading@11:         if (sc == &gxf->timecode_track)
yading@11:             gxf_write_umf_media_timecode(pb, gxf->tc.drop);
yading@11:         else {
yading@11:             AVStream *st = s->streams[i];
yading@11:             switch (st->codec->codec_id) {
yading@11:             case AV_CODEC_ID_MPEG1VIDEO:
yading@11:             case AV_CODEC_ID_MPEG2VIDEO:
yading@11:                 gxf_write_umf_media_mpeg(pb, st);
yading@11:                 break;
yading@11:             case AV_CODEC_ID_PCM_S16LE:
yading@11:                 gxf_write_umf_media_audio(pb, sc);
yading@11:                 break;
yading@11:             case AV_CODEC_ID_DVVIDEO:
yading@11:                 gxf_write_umf_media_dv(pb, sc);
yading@11:                 break;
yading@11:             }
yading@11:         }
yading@11: 
yading@11:         curpos = avio_tell(pb);
yading@11:         avio_seek(pb, startpos, SEEK_SET);
yading@11:         avio_wl16(pb, curpos - startpos);
yading@11:         avio_seek(pb, curpos, SEEK_SET);
yading@11:     }
yading@11:     return avio_tell(pb) - pos;
yading@11: }
yading@11: 
yading@11: static int gxf_write_umf_packet(AVFormatContext *s)
yading@11: {
yading@11:     GXFContext *gxf = s->priv_data;
yading@11:     AVIOContext *pb = s->pb;
yading@11:     int64_t pos = avio_tell(pb);
yading@11: 
yading@11:     gxf_write_packet_header(pb, PKT_UMF);
yading@11: 
yading@11:     /* preamble */
yading@11:     avio_w8(pb, 3); /* first and last (only) packet */
yading@11:     avio_wb32(pb, gxf->umf_length); /* data length */
yading@11: 
yading@11:     gxf->umf_start_offset = avio_tell(pb);
yading@11:     gxf_write_umf_payload(s);
yading@11:     gxf_write_umf_material_description(s);
yading@11:     gxf->umf_track_size = gxf_write_umf_track_description(s);
yading@11:     gxf->umf_media_size = gxf_write_umf_media_description(s);
yading@11:     gxf->umf_length = avio_tell(pb) - gxf->umf_start_offset;
yading@11:     return updatePacketSize(pb, pos);
yading@11: }
yading@11: 
yading@11: static const int GXF_samples_per_frame[] = { 32768, 0 };
yading@11: 
yading@11: static void gxf_init_timecode_track(GXFStreamContext *sc, GXFStreamContext *vsc)
yading@11: {
yading@11:     if (!vsc)
yading@11:         return;
yading@11: 
yading@11:     sc->media_type = vsc->sample_rate == 60 ? 7 : 8;
yading@11:     sc->sample_rate = vsc->sample_rate;
yading@11:     sc->media_info = ('T'<<8) | '0';
yading@11:     sc->track_type = 3;
yading@11:     sc->frame_rate_index = vsc->frame_rate_index;
yading@11:     sc->lines_index = vsc->lines_index;
yading@11:     sc->sample_size = 16;
yading@11:     sc->fields = vsc->fields;
yading@11: }
yading@11: 
yading@11: static int gxf_init_timecode(AVFormatContext *s, GXFTimecode *tc, const char *tcstr, int fields)
yading@11: {
yading@11:     char c;
yading@11: 
yading@11:     if (sscanf(tcstr, "%d:%d:%d%c%d", &tc->hh, &tc->mm, &tc->ss, &c, &tc->ff) != 5) {
yading@11:         av_log(s, AV_LOG_ERROR, "unable to parse timecode, "
yading@11:                                 "syntax: hh:mm:ss[:;.]ff\n");
yading@11:         return -1;
yading@11:     }
yading@11: 
yading@11:     tc->color = 0;
yading@11:     tc->drop = c != ':';
yading@11: 
yading@11:     if (fields == 2)
yading@11:         tc->ff = tc->ff * 2;
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int gxf_write_header(AVFormatContext *s)
yading@11: {
yading@11:     AVIOContext *pb = s->pb;
yading@11:     GXFContext *gxf = s->priv_data;
yading@11:     GXFStreamContext *vsc = NULL;
yading@11:     uint8_t tracks[255] = {0};
yading@11:     int i, media_info = 0;
yading@11:     AVDictionaryEntry *tcr = av_dict_get(s->metadata, "timecode", NULL, 0);
yading@11: 
yading@11:     if (!pb->seekable) {
yading@11:         av_log(s, AV_LOG_ERROR, "gxf muxer does not support streamed output, patch welcome\n");
yading@11:         return -1;
yading@11:     }
yading@11: 
yading@11:     gxf->flags |= 0x00080000; /* material is simple clip */
yading@11:     for (i = 0; i < s->nb_streams; ++i) {
yading@11:         AVStream *st = s->streams[i];
yading@11:         GXFStreamContext *sc = av_mallocz(sizeof(*sc));
yading@11:         if (!sc)
yading@11:             return AVERROR(ENOMEM);
yading@11:         st->priv_data = sc;
yading@11: 
yading@11:         sc->media_type = ff_codec_get_tag(gxf_media_types, st->codec->codec_id);
yading@11:         if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
yading@11:             if (st->codec->codec_id != AV_CODEC_ID_PCM_S16LE) {
yading@11:                 av_log(s, AV_LOG_ERROR, "only 16 BIT PCM LE allowed for now\n");
yading@11:                 return -1;
yading@11:             }
yading@11:             if (st->codec->sample_rate != 48000) {
yading@11:                 av_log(s, AV_LOG_ERROR, "only 48000hz sampling rate is allowed\n");
yading@11:                 return -1;
yading@11:             }
yading@11:             if (st->codec->channels != 1) {
yading@11:                 av_log(s, AV_LOG_ERROR, "only mono tracks are allowed\n");
yading@11:                 return -1;
yading@11:             }
yading@11:             sc->track_type = 2;
yading@11:             sc->sample_rate = st->codec->sample_rate;
yading@11:             avpriv_set_pts_info(st, 64, 1, sc->sample_rate);
yading@11:             sc->sample_size = 16;
yading@11:             sc->frame_rate_index = -2;
yading@11:             sc->lines_index = -2;
yading@11:             sc->fields = -2;
yading@11:             gxf->audio_tracks++;
yading@11:             gxf->flags |= 0x04000000; /* audio is 16 bit pcm */
yading@11:             media_info = 'A';
yading@11:         } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
yading@11:             if (i != 0) {
yading@11:                 av_log(s, AV_LOG_ERROR, "video stream must be the first track\n");
yading@11:                 return -1;
yading@11:             }
yading@11:             /* FIXME check from time_base ? */
yading@11:             if (st->codec->height == 480 || st->codec->height == 512) { /* NTSC or NTSC+VBI */
yading@11:                 sc->frame_rate_index = 5;
yading@11:                 sc->sample_rate = 60;
yading@11:                 gxf->flags |= 0x00000080;
yading@11:                 gxf->time_base = (AVRational){ 1001, 60000 };
yading@11:             } else if (st->codec->height == 576 || st->codec->height == 608) { /* PAL or PAL+VBI */
yading@11:                 sc->frame_rate_index = 6;
yading@11:                 sc->media_type++;
yading@11:                 sc->sample_rate = 50;
yading@11:                 gxf->flags |= 0x00000040;
yading@11:                 gxf->time_base = (AVRational){ 1, 50 };
yading@11:             } else {
yading@11:                 av_log(s, AV_LOG_ERROR, "unsupported video resolution, "
yading@11:                        "gxf muxer only accepts PAL or NTSC resolutions currently\n");
yading@11:                 return -1;
yading@11:             }
yading@11:             if (!tcr)
yading@11:                 tcr = av_dict_get(st->metadata, "timecode", NULL, 0);
yading@11:             avpriv_set_pts_info(st, 64, gxf->time_base.num, gxf->time_base.den);
yading@11:             if (gxf_find_lines_index(st) < 0)
yading@11:                 sc->lines_index = -1;
yading@11:             sc->sample_size = st->codec->bit_rate;
yading@11:             sc->fields = 2; /* interlaced */
yading@11: 
yading@11:             vsc = sc;
yading@11: 
yading@11:             switch (st->codec->codec_id) {
yading@11:             case AV_CODEC_ID_MJPEG:
yading@11:                 sc->track_type = 1;
yading@11:                 gxf->flags |= 0x00004000;
yading@11:                 media_info = 'J';
yading@11:                 break;
yading@11:             case AV_CODEC_ID_MPEG1VIDEO:
yading@11:                 sc->track_type = 9;
yading@11:                 gxf->mpeg_tracks++;
yading@11:                 media_info = 'L';
yading@11:                 break;
yading@11:             case AV_CODEC_ID_MPEG2VIDEO:
yading@11:                 sc->first_gop_closed = -1;
yading@11:                 sc->track_type = 4;
yading@11:                 gxf->mpeg_tracks++;
yading@11:                 gxf->flags |= 0x00008000;
yading@11:                 media_info = 'M';
yading@11:                 break;
yading@11:             case AV_CODEC_ID_DVVIDEO:
yading@11:                 if (st->codec->pix_fmt == AV_PIX_FMT_YUV422P) {
yading@11:                     sc->media_type += 2;
yading@11:                     sc->track_type = 6;
yading@11:                     gxf->flags |= 0x00002000;
yading@11:                     media_info = 'E';
yading@11:                 } else {
yading@11:                     sc->track_type = 5;
yading@11:                     gxf->flags |= 0x00001000;
yading@11:                     media_info = 'D';
yading@11:                 }
yading@11:                 break;
yading@11:             default:
yading@11:                 av_log(s, AV_LOG_ERROR, "video codec not supported\n");
yading@11:                 return -1;
yading@11:             }
yading@11:         }
yading@11:         /* FIXME first 10 audio tracks are 0 to 9 next 22 are A to V */
yading@11:         sc->media_info = media_info<<8 | ('0'+tracks[media_info]++);
yading@11:         sc->order = s->nb_streams - st->index;
yading@11:     }
yading@11: 
yading@11:     if (ff_audio_interleave_init(s, GXF_samples_per_frame, (AVRational){ 1, 48000 }) < 0)
yading@11:         return -1;
yading@11: 
yading@11:     if (tcr && vsc)
yading@11:         gxf_init_timecode(s, &gxf->tc, tcr->value, vsc->fields);
yading@11: 
yading@11:     gxf_init_timecode_track(&gxf->timecode_track, vsc);
yading@11:     gxf->flags |= 0x200000; // time code track is non-drop frame
yading@11: 
yading@11:     gxf_write_map_packet(s, 0);
yading@11:     gxf_write_flt_packet(s);
yading@11:     gxf_write_umf_packet(s);
yading@11: 
yading@11:     gxf->packet_count = 3;
yading@11: 
yading@11:     avio_flush(pb);
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int gxf_write_eos_packet(AVIOContext *pb)
yading@11: {
yading@11:     int64_t pos = avio_tell(pb);
yading@11: 
yading@11:     gxf_write_packet_header(pb, PKT_EOS);
yading@11:     return updatePacketSize(pb, pos);
yading@11: }
yading@11: 
yading@11: static int gxf_write_trailer(AVFormatContext *s)
yading@11: {
yading@11:     GXFContext *gxf = s->priv_data;
yading@11:     AVIOContext *pb = s->pb;
yading@11:     int64_t end;
yading@11:     int i;
yading@11: 
yading@11:     ff_audio_interleave_close(s);
yading@11: 
yading@11:     gxf_write_eos_packet(pb);
yading@11:     end = avio_tell(pb);
yading@11:     avio_seek(pb, 0, SEEK_SET);
yading@11:     /* overwrite map, flt and umf packets with new values */
yading@11:     gxf_write_map_packet(s, 1);
yading@11:     gxf_write_flt_packet(s);
yading@11:     gxf_write_umf_packet(s);
yading@11:     avio_flush(pb);
yading@11:     /* update duration in all map packets */
yading@11:     for (i = 1; i < gxf->map_offsets_nb; i++) {
yading@11:         avio_seek(pb, gxf->map_offsets[i], SEEK_SET);
yading@11:         gxf_write_map_packet(s, 1);
yading@11:         avio_flush(pb);
yading@11:     }
yading@11: 
yading@11:     avio_seek(pb, end, SEEK_SET);
yading@11: 
yading@11:     av_freep(&gxf->flt_entries);
yading@11:     av_freep(&gxf->map_offsets);
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int gxf_parse_mpeg_frame(GXFStreamContext *sc, const uint8_t *buf, int size)
yading@11: {
yading@11:     uint32_t c=-1;
yading@11:     int i;
yading@11:     for(i=0; i<size-4 && c!=0x100; i++){
yading@11:         c = (c<<8) + buf[i];
yading@11:         if(c == 0x1B8 && sc->first_gop_closed == -1) /* GOP start code */
yading@11:             sc->first_gop_closed= (buf[i+4]>>6)&1;
yading@11:     }
yading@11:     return (buf[i+1]>>3)&7;
yading@11: }
yading@11: 
yading@11: static int gxf_write_media_preamble(AVFormatContext *s, AVPacket *pkt, int size)
yading@11: {
yading@11:     GXFContext *gxf = s->priv_data;
yading@11:     AVIOContext *pb = s->pb;
yading@11:     AVStream *st = s->streams[pkt->stream_index];
yading@11:     GXFStreamContext *sc = st->priv_data;
yading@11:     unsigned field_nb;
yading@11:     /* If the video is frame-encoded, the frame numbers shall be represented by
yading@11:      * even field numbers.
yading@11:      * see SMPTE360M-2004  6.4.2.1.3 Media field number */
yading@11:     if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
yading@11:         field_nb = gxf->nb_fields;
yading@11:     } else {
yading@11:         field_nb = av_rescale_rnd(pkt->dts, gxf->time_base.den,
yading@11:                                   (int64_t)48000*gxf->time_base.num, AV_ROUND_UP);
yading@11:     }
yading@11: 
yading@11:     avio_w8(pb, sc->media_type);
yading@11:     avio_w8(pb, st->index);
yading@11:     avio_wb32(pb, field_nb);
yading@11:     if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
yading@11:         avio_wb16(pb, 0);
yading@11:         avio_wb16(pb, size / 2);
yading@11:     } else if (st->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
yading@11:         int frame_type = gxf_parse_mpeg_frame(sc, pkt->data, pkt->size);
yading@11:         if (frame_type == AV_PICTURE_TYPE_I) {
yading@11:             avio_w8(pb, 0x0d);
yading@11:             sc->iframes++;
yading@11:         } else if (frame_type == AV_PICTURE_TYPE_B) {
yading@11:             avio_w8(pb, 0x0f);
yading@11:             sc->bframes++;
yading@11:         } else {
yading@11:             avio_w8(pb, 0x0e);
yading@11:             sc->pframes++;
yading@11:         }
yading@11:         avio_wb24(pb, size);
yading@11:     } else if (st->codec->codec_id == AV_CODEC_ID_DVVIDEO) {
yading@11:         avio_w8(pb, size / 4096);
yading@11:         avio_wb24(pb, 0);
yading@11:     } else
yading@11:         avio_wb32(pb, size);
yading@11:     avio_wb32(pb, field_nb);
yading@11:     avio_w8(pb, 1); /* flags */
yading@11:     avio_w8(pb, 0); /* reserved */
yading@11:     return 16;
yading@11: }
yading@11: 
yading@11: static int gxf_write_packet(AVFormatContext *s, AVPacket *pkt)
yading@11: {
yading@11:     GXFContext *gxf = s->priv_data;
yading@11:     AVIOContext *pb = s->pb;
yading@11:     AVStream *st = s->streams[pkt->stream_index];
yading@11:     int64_t pos = avio_tell(pb);
yading@11:     int padding = 0;
yading@11:     int packet_start_offset = avio_tell(pb) / 1024;
yading@11: 
yading@11:     gxf_write_packet_header(pb, PKT_MEDIA);
yading@11:     if (st->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO && pkt->size % 4) /* MPEG-2 frames must be padded */
yading@11:         padding = 4 - pkt->size % 4;
yading@11:     else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
yading@11:         padding = GXF_AUDIO_PACKET_SIZE - pkt->size;
yading@11:     gxf_write_media_preamble(s, pkt, pkt->size + padding);
yading@11:     avio_write(pb, pkt->data, pkt->size);
yading@11:     gxf_write_padding(pb, padding);
yading@11: 
yading@11:     if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
yading@11:         if (!(gxf->flt_entries_nb % 500)) {
yading@11:             gxf->flt_entries = av_realloc_f(gxf->flt_entries,
yading@11:                                             sizeof(*gxf->flt_entries),
yading@11:                                             gxf->flt_entries_nb+500);
yading@11:             if (!gxf->flt_entries) {
yading@11:                 av_log(s, AV_LOG_ERROR, "could not reallocate flt entries\n");
yading@11:                 return -1;
yading@11:             }
yading@11:         }
yading@11:         gxf->flt_entries[gxf->flt_entries_nb++] = packet_start_offset;
yading@11:         gxf->nb_fields += 2; // count fields
yading@11:     }
yading@11: 
yading@11:     updatePacketSize(pb, pos);
yading@11: 
yading@11:     gxf->packet_count++;
yading@11:     if (gxf->packet_count == 100) {
yading@11:         gxf_write_map_packet(s, 0);
yading@11:         gxf->packet_count = 0;
yading@11:     }
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int gxf_compare_field_nb(AVFormatContext *s, AVPacket *next, AVPacket *cur)
yading@11: {
yading@11:     GXFContext *gxf = s->priv_data;
yading@11:     AVPacket *pkt[2] = { cur, next };
yading@11:     int i, field_nb[2];
yading@11:     GXFStreamContext *sc[2];
yading@11: 
yading@11:     for (i = 0; i < 2; i++) {
yading@11:         AVStream *st = s->streams[pkt[i]->stream_index];
yading@11:         sc[i] = st->priv_data;
yading@11:         if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
yading@11:             field_nb[i] = av_rescale_rnd(pkt[i]->dts, gxf->time_base.den,
yading@11:                                          (int64_t)48000*gxf->time_base.num, AV_ROUND_UP);
yading@11:             field_nb[i] &= ~1; // compare against even field number because audio must be before video
yading@11:         } else
yading@11:             field_nb[i] = pkt[i]->dts; // dts are field based
yading@11:     }
yading@11: 
yading@11:     return field_nb[1] > field_nb[0] ||
yading@11:         (field_nb[1] == field_nb[0] && sc[1]->order > sc[0]->order);
yading@11: }
yading@11: 
yading@11: static int gxf_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
yading@11: {
yading@11:     if (pkt && s->streams[pkt->stream_index]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
yading@11:         pkt->duration = 2; // enforce 2 fields
yading@11:     return ff_audio_rechunk_interleave(s, out, pkt, flush,
yading@11:                                ff_interleave_packet_per_dts, gxf_compare_field_nb);
yading@11: }
yading@11: 
yading@11: AVOutputFormat ff_gxf_muxer = {
yading@11:     .name              = "gxf",
yading@11:     .long_name         = NULL_IF_CONFIG_SMALL("GXF (General eXchange Format)"),
yading@11:     .extensions        = "gxf",
yading@11:     .priv_data_size    = sizeof(GXFContext),
yading@11:     .audio_codec       = AV_CODEC_ID_PCM_S16LE,
yading@11:     .video_codec       = AV_CODEC_ID_MPEG2VIDEO,
yading@11:     .write_header      = gxf_write_header,
yading@11:     .write_packet      = gxf_write_packet,
yading@11:     .write_trailer     = gxf_write_trailer,
yading@11:     .interleave_packet = gxf_interleave_packet,
yading@11: };