| /* |
| * GXF muxer. |
| * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com> |
| * |
| * 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 "avformat.h" |
| #include "gxf.h" |
| #include "riff.h" |
| #include "audiointerleave.h" |
| |
| #define GXF_AUDIO_PACKET_SIZE 65536 |
| |
| typedef struct GXFStreamContext { |
| AudioInterleaveContext aic; |
| uint32_t track_type; |
| uint32_t sample_size; |
| uint32_t sample_rate; |
| uint16_t media_type; |
| uint16_t media_info; |
| int frame_rate_index; |
| int lines_index; |
| int fields; |
| int iframes; |
| int pframes; |
| int bframes; |
| int p_per_gop; |
| int b_per_i_or_p; ///< number of B frames per I frame or P frame |
| int first_gop_closed; |
| unsigned order; ///< interleaving order |
| } GXFStreamContext; |
| |
| typedef struct GXFContext { |
| uint32_t nb_fields; |
| uint16_t audio_tracks; |
| uint16_t mpeg_tracks; |
| int64_t creation_time; |
| uint32_t umf_start_offset; |
| uint32_t umf_track_offset; |
| uint32_t umf_media_offset; |
| uint32_t umf_length; |
| uint16_t umf_track_size; |
| uint16_t umf_media_size; |
| AVRational time_base; |
| int flags; |
| GXFStreamContext timecode_track; |
| unsigned *flt_entries; ///< offsets of packets /1024, starts after 2nd video field |
| unsigned flt_entries_nb; |
| uint64_t *map_offsets; ///< offset of map packets |
| unsigned map_offsets_nb; |
| unsigned packet_count; |
| } GXFContext; |
| |
| static const struct { |
| int height, index; |
| } gxf_lines_tab[] = { |
| { 480, 1 }, /* NTSC */ |
| { 512, 1 }, /* NTSC + VBI */ |
| { 576, 2 }, /* PAL */ |
| { 608, 2 }, /* PAL + VBI */ |
| { 1080, 4 }, |
| { 720, 6 }, |
| }; |
| |
| static const AVCodecTag gxf_media_types[] = { |
| { CODEC_ID_MJPEG , 3 }, /* NTSC */ |
| { CODEC_ID_MJPEG , 4 }, /* PAL */ |
| { CODEC_ID_PCM_S24LE , 9 }, |
| { CODEC_ID_PCM_S16LE , 10 }, |
| { CODEC_ID_MPEG2VIDEO, 11 }, /* NTSC */ |
| { CODEC_ID_MPEG2VIDEO, 12 }, /* PAL */ |
| { CODEC_ID_DVVIDEO , 13 }, /* NTSC */ |
| { CODEC_ID_DVVIDEO , 14 }, /* PAL */ |
| { CODEC_ID_DVVIDEO , 15 }, /* 50M NTSC */ |
| { CODEC_ID_DVVIDEO , 16 }, /* 50M PAL */ |
| { CODEC_ID_AC3 , 17 }, |
| //{ CODEC_ID_NONE, , 18 }, /* Non compressed 24 bit audio */ |
| { CODEC_ID_MPEG2VIDEO, 20 }, /* MPEG HD */ |
| { CODEC_ID_MPEG1VIDEO, 22 }, /* NTSC */ |
| { CODEC_ID_MPEG1VIDEO, 23 }, /* PAL */ |
| { 0, 0 }, |
| }; |
| |
| #define SERVER_PATH "EXT:/PDR/default/" |
| #define ES_NAME_PATTERN "EXT:/PDR/default/ES." |
| |
| static int gxf_find_lines_index(AVStream *st) |
| { |
| GXFStreamContext *sc = st->priv_data; |
| int i; |
| |
| for (i = 0; i < 6; ++i) { |
| if (st->codec->height == gxf_lines_tab[i].height) { |
| sc->lines_index = gxf_lines_tab[i].index; |
| return 0; |
| } |
| } |
| return -1; |
| } |
| |
| static void gxf_write_padding(ByteIOContext *pb, int64_t to_pad) |
| { |
| for (; to_pad > 0; to_pad--) { |
| put_byte(pb, 0); |
| } |
| } |
| |
| static int64_t updatePacketSize(ByteIOContext *pb, int64_t pos) |
| { |
| int64_t curpos; |
| int size; |
| |
| size = url_ftell(pb) - pos; |
| if (size % 4) { |
| gxf_write_padding(pb, 4 - size % 4); |
| size = url_ftell(pb) - pos; |
| } |
| curpos = url_ftell(pb); |
| url_fseek(pb, pos + 6, SEEK_SET); |
| put_be32(pb, size); |
| url_fseek(pb, curpos, SEEK_SET); |
| return curpos - pos; |
| } |
| |
| static int64_t updateSize(ByteIOContext *pb, int64_t pos) |
| { |
| int64_t curpos; |
| |
| curpos = url_ftell(pb); |
| url_fseek(pb, pos, SEEK_SET); |
| put_be16(pb, curpos - pos - 2); |
| url_fseek(pb, curpos, SEEK_SET); |
| return curpos - pos; |
| } |
| |
| static void gxf_write_packet_header(ByteIOContext *pb, GXFPktType type) |
| { |
| put_be32(pb, 0); /* packet leader for synchro */ |
| put_byte(pb, 1); |
| put_byte(pb, type); /* map packet */ |
| put_be32(pb, 0); /* size */ |
| put_be32(pb, 0); /* reserved */ |
| put_byte(pb, 0xE1); /* trailer 1 */ |
| put_byte(pb, 0xE2); /* trailer 2 */ |
| } |
| |
| static int gxf_write_mpeg_auxiliary(ByteIOContext *pb, AVStream *st) |
| { |
| GXFStreamContext *sc = st->priv_data; |
| char buffer[1024]; |
| int size, starting_line; |
| |
| if (sc->iframes) { |
| sc->p_per_gop = sc->pframes / sc->iframes; |
| if (sc->pframes % sc->iframes) |
| sc->p_per_gop++; |
| if (sc->pframes) { |
| sc->b_per_i_or_p = sc->bframes / sc->pframes; |
| if (sc->bframes % sc->pframes) |
| sc->b_per_i_or_p++; |
| } |
| if (sc->p_per_gop > 9) |
| sc->p_per_gop = 9; /* ensure value won't take more than one char */ |
| if (sc->b_per_i_or_p > 9) |
| sc->b_per_i_or_p = 9; /* ensure value won't take more than one char */ |
| } |
| if (st->codec->height == 512 || st->codec->height == 608) |
| starting_line = 7; // VBI |
| else if (st->codec->height == 480) |
| starting_line = 20; |
| else |
| starting_line = 23; // default PAL |
| |
| size = snprintf(buffer, 1024, "Ver 1\nBr %.6f\nIpg 1\nPpi %d\nBpiop %d\n" |
| "Pix 0\nCf %d\nCg %d\nSl %d\nnl16 %d\nVi 1\nf1 1\n", |
| (float)st->codec->bit_rate, sc->p_per_gop, sc->b_per_i_or_p, |
| st->codec->pix_fmt == PIX_FMT_YUV422P ? 2 : 1, sc->first_gop_closed == 1, |
| starting_line, st->codec->height / 16); |
| put_byte(pb, TRACK_MPG_AUX); |
| put_byte(pb, size + 1); |
| put_buffer(pb, (uint8_t *)buffer, size + 1); |
| return size + 3; |
| } |
| |
| static int gxf_write_timecode_auxiliary(ByteIOContext *pb, GXFStreamContext *sc) |
| { |
| put_byte(pb, 0); /* fields */ |
| put_byte(pb, 0); /* seconds */ |
| put_byte(pb, 0); /* minutes */ |
| put_byte(pb, 0); /* flags + hours */ |
| /* reserved */ |
| put_be32(pb, 0); |
| return 8; |
| } |
| |
| static int gxf_write_track_description(AVFormatContext *s, GXFStreamContext *sc, int index) |
| { |
| ByteIOContext *pb = s->pb; |
| int64_t pos; |
| int mpeg = sc->track_type == 4 || sc->track_type == 9; |
| |
| /* track description section */ |
| put_byte(pb, sc->media_type + 0x80); |
| put_byte(pb, index + 0xC0); |
| |
| pos = url_ftell(pb); |
| put_be16(pb, 0); /* size */ |
| |
| /* media file name */ |
| put_byte(pb, TRACK_NAME); |
| put_byte(pb, strlen(ES_NAME_PATTERN) + 3); |
| put_tag(pb, ES_NAME_PATTERN); |
| put_be16(pb, sc->media_info); |
| put_byte(pb, 0); |
| |
| if (!mpeg) { |
| /* auxiliary information */ |
| put_byte(pb, TRACK_AUX); |
| put_byte(pb, 8); |
| if (sc->track_type == 3) |
| gxf_write_timecode_auxiliary(pb, sc); |
| else |
| put_le64(pb, 0); |
| } |
| |
| /* file system version */ |
| put_byte(pb, TRACK_VER); |
| put_byte(pb, 4); |
| put_be32(pb, 0); |
| |
| if (mpeg) |
| gxf_write_mpeg_auxiliary(pb, s->streams[index]); |
| |
| /* frame rate */ |
| put_byte(pb, TRACK_FPS); |
| put_byte(pb, 4); |
| put_be32(pb, sc->frame_rate_index); |
| |
| /* lines per frame */ |
| put_byte(pb, TRACK_LINES); |
| put_byte(pb, 4); |
| put_be32(pb, sc->lines_index); |
| |
| /* fields per frame */ |
| put_byte(pb, TRACK_FPF); |
| put_byte(pb, 4); |
| put_be32(pb, sc->fields); |
| |
| return updateSize(pb, pos); |
| } |
| |
| static int gxf_write_material_data_section(AVFormatContext *s) |
| { |
| GXFContext *gxf = s->priv_data; |
| ByteIOContext *pb = s->pb; |
| int64_t pos; |
| const char *filename = strrchr(s->filename, '/'); |
| |
| pos = url_ftell(pb); |
| put_be16(pb, 0); /* size */ |
| |
| /* name */ |
| if (filename) |
| filename++; |
| else |
| filename = s->filename; |
| put_byte(pb, MAT_NAME); |
| put_byte(pb, strlen(SERVER_PATH) + strlen(filename) + 1); |
| put_tag(pb, SERVER_PATH); |
| put_tag(pb, filename); |
| put_byte(pb, 0); |
| |
| /* first field */ |
| put_byte(pb, MAT_FIRST_FIELD); |
| put_byte(pb, 4); |
| put_be32(pb, 0); |
| |
| /* last field */ |
| put_byte(pb, MAT_LAST_FIELD); |
| put_byte(pb, 4); |
| put_be32(pb, gxf->nb_fields); |
| |
| /* reserved */ |
| put_byte(pb, MAT_MARK_IN); |
| put_byte(pb, 4); |
| put_be32(pb, 0); |
| |
| put_byte(pb, MAT_MARK_OUT); |
| put_byte(pb, 4); |
| put_be32(pb, gxf->nb_fields); |
| |
| /* estimated size */ |
| put_byte(pb, MAT_SIZE); |
| put_byte(pb, 4); |
| put_be32(pb, url_fsize(pb) / 1024); |
| |
| return updateSize(pb, pos); |
| } |
| |
| static int gxf_write_track_description_section(AVFormatContext *s) |
| { |
| GXFContext *gxf = s->priv_data; |
| ByteIOContext *pb = s->pb; |
| int64_t pos; |
| int i; |
| |
| pos = url_ftell(pb); |
| put_be16(pb, 0); /* size */ |
| for (i = 0; i < s->nb_streams; ++i) |
| gxf_write_track_description(s, s->streams[i]->priv_data, i); |
| |
| gxf_write_track_description(s, &gxf->timecode_track, s->nb_streams); |
| |
| return updateSize(pb, pos); |
| } |
| |
| static int gxf_write_map_packet(AVFormatContext *s, int rewrite) |
| { |
| GXFContext *gxf = s->priv_data; |
| ByteIOContext *pb = s->pb; |
| int64_t pos = url_ftell(pb); |
| |
| if (!rewrite) { |
| if (!(gxf->map_offsets_nb % 30)) { |
| gxf->map_offsets = av_realloc(gxf->map_offsets, |
| (gxf->map_offsets_nb+30)*sizeof(*gxf->map_offsets)); |
| if (!gxf->map_offsets) { |
| av_log(s, AV_LOG_ERROR, "could not realloc map offsets\n"); |
| return -1; |
| } |
| } |
| gxf->map_offsets[gxf->map_offsets_nb++] = pos; // do not increment here |
| } |
| |
| gxf_write_packet_header(pb, PKT_MAP); |
| |
| /* preamble */ |
| put_byte(pb, 0xE0); /* version */ |
| put_byte(pb, 0xFF); /* reserved */ |
| |
| gxf_write_material_data_section(s); |
| gxf_write_track_description_section(s); |
| |
| return updatePacketSize(pb, pos); |
| } |
| |
| static int gxf_write_flt_packet(AVFormatContext *s) |
| { |
| GXFContext *gxf = s->priv_data; |
| ByteIOContext *pb = s->pb; |
| int64_t pos = url_ftell(pb); |
| int fields_per_flt = (gxf->nb_fields+1) / 1000 + 1; |
| int flt_entries = gxf->nb_fields / fields_per_flt - 1; |
| int i = 0; |
| |
| gxf_write_packet_header(pb, PKT_FLT); |
| |
| put_le32(pb, fields_per_flt); /* number of fields */ |
| put_le32(pb, flt_entries); /* number of active flt entries */ |
| |
| if (gxf->flt_entries) { |
| for (i = 0; i < flt_entries; i++) |
| put_le32(pb, gxf->flt_entries[(i*fields_per_flt)>>1]); |
| } |
| |
| for (; i < 1000; i++) |
| put_le32(pb, 0); |
| |
| return updatePacketSize(pb, pos); |
| } |
| |
| static int gxf_write_umf_material_description(AVFormatContext *s) |
| { |
| GXFContext *gxf = s->priv_data; |
| ByteIOContext *pb = s->pb; |
| int timecode_base = gxf->time_base.den == 60000 ? 60 : 50; |
| |
| // XXX drop frame |
| uint32_t timecode = |
| gxf->nb_fields / (timecode_base * 3600) % 24 << 24 | // hours |
| gxf->nb_fields / (timecode_base * 60) % 60 << 16 | // minutes |
| gxf->nb_fields / timecode_base % 60 << 8 | // seconds |
| gxf->nb_fields % timecode_base; // fields |
| |
| put_le32(pb, gxf->flags); |
| put_le32(pb, gxf->nb_fields); /* length of the longest track */ |
| put_le32(pb, gxf->nb_fields); /* length of the shortest track */ |
| put_le32(pb, 0); /* mark in */ |
| put_le32(pb, gxf->nb_fields); /* mark out */ |
| put_le32(pb, 0); /* timecode mark in */ |
| put_le32(pb, timecode); /* timecode mark out */ |
| put_le64(pb, s->timestamp); /* modification time */ |
| put_le64(pb, s->timestamp); /* creation time */ |
| put_le16(pb, 0); /* reserved */ |
| put_le16(pb, 0); /* reserved */ |
| put_le16(pb, gxf->audio_tracks); |
| put_le16(pb, 1); /* timecode track count */ |
| put_le16(pb, 0); /* reserved */ |
| put_le16(pb, gxf->mpeg_tracks); |
| return 48; |
| } |
| |
| static int gxf_write_umf_payload(AVFormatContext *s) |
| { |
| GXFContext *gxf = s->priv_data; |
| ByteIOContext *pb = s->pb; |
| |
| put_le32(pb, gxf->umf_length); /* total length of the umf data */ |
| put_le32(pb, 3); /* version */ |
| put_le32(pb, s->nb_streams+1); |
| put_le32(pb, gxf->umf_track_offset); /* umf track section offset */ |
| put_le32(pb, gxf->umf_track_size); |
| put_le32(pb, s->nb_streams+1); |
| put_le32(pb, gxf->umf_media_offset); |
| put_le32(pb, gxf->umf_media_size); |
| put_le32(pb, gxf->umf_length); /* user data offset */ |
| put_le32(pb, 0); /* user data size */ |
| put_le32(pb, 0); /* reserved */ |
| put_le32(pb, 0); /* reserved */ |
| return 48; |
| } |
| |
| static int gxf_write_umf_track_description(AVFormatContext *s) |
| { |
| ByteIOContext *pb = s->pb; |
| GXFContext *gxf = s->priv_data; |
| int64_t pos = url_ftell(pb); |
| int i; |
| |
| gxf->umf_track_offset = pos - gxf->umf_start_offset; |
| for (i = 0; i < s->nb_streams; ++i) { |
| GXFStreamContext *sc = s->streams[i]->priv_data; |
| put_le16(pb, sc->media_info); |
| put_le16(pb, 1); |
| } |
| |
| put_le16(pb, gxf->timecode_track.media_info); |
| put_le16(pb, 1); |
| |
| return url_ftell(pb) - pos; |
| } |
| |
| static int gxf_write_umf_media_mpeg(ByteIOContext *pb, AVStream *st) |
| { |
| GXFStreamContext *sc = st->priv_data; |
| |
| if (st->codec->pix_fmt == PIX_FMT_YUV422P) |
| put_le32(pb, 2); |
| else |
| put_le32(pb, 1); /* default to 420 */ |
| put_le32(pb, sc->first_gop_closed == 1); /* closed = 1, open = 0, unknown = 255 */ |
| put_le32(pb, 3); /* top = 1, bottom = 2, frame = 3, unknown = 0 */ |
| put_le32(pb, 1); /* I picture per GOP */ |
| put_le32(pb, sc->p_per_gop); |
| put_le32(pb, sc->b_per_i_or_p); |
| if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) |
| put_le32(pb, 2); |
| else if (st->codec->codec_id == CODEC_ID_MPEG1VIDEO) |
| put_le32(pb, 1); |
| else |
| put_le32(pb, 0); |
| put_le32(pb, 0); /* reserved */ |
| return 32; |
| } |
| |
| static int gxf_write_umf_media_timecode(ByteIOContext *pb, GXFStreamContext *sc) |
| { |
| put_le32(pb, 1); /* non drop frame */ |
| put_le32(pb, 0); /* reserved */ |
| put_le32(pb, 0); /* reserved */ |
| put_le32(pb, 0); /* reserved */ |
| put_le32(pb, 0); /* reserved */ |
| put_le32(pb, 0); /* reserved */ |
| put_le32(pb, 0); /* reserved */ |
| put_le32(pb, 0); /* reserved */ |
| return 32; |
| } |
| |
| static int gxf_write_umf_media_dv(ByteIOContext *pb, GXFStreamContext *sc) |
| { |
| int i; |
| |
| for (i = 0; i < 8; i++) { |
| put_be32(pb, 0); |
| } |
| return 32; |
| } |
| |
| static int gxf_write_umf_media_audio(ByteIOContext *pb, GXFStreamContext *sc) |
| { |
| put_le64(pb, av_dbl2int(1)); /* sound level to begin to */ |
| put_le64(pb, av_dbl2int(1)); /* sound level to begin to */ |
| put_le32(pb, 0); /* number of fields over which to ramp up sound level */ |
| put_le32(pb, 0); /* number of fields over which to ramp down sound level */ |
| put_le32(pb, 0); /* reserved */ |
| put_le32(pb, 0); /* reserved */ |
| return 32; |
| } |
| |
| #if 0 |
| static int gxf_write_umf_media_mjpeg(ByteIOContext *pb, GXFStreamContext *sc) |
| { |
| put_be64(pb, 0); /* FIXME FLOAT max chroma quant level */ |
| put_be64(pb, 0); /* FIXME FLOAT max luma quant level */ |
| put_be64(pb, 0); /* FIXME FLOAT min chroma quant level */ |
| put_be64(pb, 0); /* FIXME FLOAT min luma quant level */ |
| return 32; |
| } |
| #endif |
| |
| static int gxf_write_umf_media_description(AVFormatContext *s) |
| { |
| GXFContext *gxf = s->priv_data; |
| ByteIOContext *pb = s->pb; |
| int64_t pos; |
| int i, j; |
| |
| pos = url_ftell(pb); |
| gxf->umf_media_offset = pos - gxf->umf_start_offset; |
| for (i = 0; i <= s->nb_streams; ++i) { |
| GXFStreamContext *sc; |
| int64_t startpos, curpos; |
| |
| if (i == s->nb_streams) |
| sc = &gxf->timecode_track; |
| else |
| sc = s->streams[i]->priv_data; |
| |
| startpos = url_ftell(pb); |
| put_le16(pb, 0); /* length */ |
| put_le16(pb, sc->media_info); |
| put_le16(pb, 0); /* reserved */ |
| put_le16(pb, 0); /* reserved */ |
| put_le32(pb, gxf->nb_fields); |
| put_le32(pb, 0); /* attributes rw, ro */ |
| put_le32(pb, 0); /* mark in */ |
| put_le32(pb, gxf->nb_fields); /* mark out */ |
| put_buffer(pb, ES_NAME_PATTERN, sizeof(ES_NAME_PATTERN)); |
| put_be16(pb, sc->media_info); |
| for (j = sizeof(ES_NAME_PATTERN)+2; j < 88; j++) |
| put_byte(pb, 0); |
| put_le32(pb, sc->track_type); |
| put_le32(pb, sc->sample_rate); |
| put_le32(pb, sc->sample_size); |
| put_le32(pb, 0); /* reserved */ |
| |
| if (sc == &gxf->timecode_track) |
| gxf_write_umf_media_timecode(pb, sc); /* 8 0bytes */ |
| else { |
| AVStream *st = s->streams[i]; |
| switch (st->codec->codec_id) { |
| case CODEC_ID_MPEG2VIDEO: |
| gxf_write_umf_media_mpeg(pb, st); |
| break; |
| case CODEC_ID_PCM_S16LE: |
| gxf_write_umf_media_audio(pb, sc); |
| break; |
| case CODEC_ID_DVVIDEO: |
| gxf_write_umf_media_dv(pb, sc); |
| break; |
| } |
| } |
| |
| curpos = url_ftell(pb); |
| url_fseek(pb, startpos, SEEK_SET); |
| put_le16(pb, curpos - startpos); |
| url_fseek(pb, curpos, SEEK_SET); |
| } |
| return url_ftell(pb) - pos; |
| } |
| |
| static int gxf_write_umf_packet(AVFormatContext *s) |
| { |
| GXFContext *gxf = s->priv_data; |
| ByteIOContext *pb = s->pb; |
| int64_t pos = url_ftell(pb); |
| |
| gxf_write_packet_header(pb, PKT_UMF); |
| |
| /* preamble */ |
| put_byte(pb, 3); /* first and last (only) packet */ |
| put_be32(pb, gxf->umf_length); /* data length */ |
| |
| gxf->umf_start_offset = url_ftell(pb); |
| gxf_write_umf_payload(s); |
| gxf_write_umf_material_description(s); |
| gxf->umf_track_size = gxf_write_umf_track_description(s); |
| gxf->umf_media_size = gxf_write_umf_media_description(s); |
| gxf->umf_length = url_ftell(pb) - gxf->umf_start_offset; |
| return updatePacketSize(pb, pos); |
| } |
| |
| static const int GXF_samples_per_frame[] = { 32768, 0 }; |
| |
| static void gxf_init_timecode_track(GXFStreamContext *sc, GXFStreamContext *vsc) |
| { |
| if (!vsc) |
| return; |
| |
| sc->media_type = vsc->sample_rate == 60 ? 7 : 8; |
| sc->sample_rate = vsc->sample_rate; |
| sc->media_info = ('T'<<8) | '0'; |
| sc->track_type = 3; |
| sc->frame_rate_index = vsc->frame_rate_index; |
| sc->lines_index = vsc->lines_index; |
| sc->sample_size = 16; |
| sc->fields = vsc->fields; |
| } |
| |
| static int gxf_write_header(AVFormatContext *s) |
| { |
| ByteIOContext *pb = s->pb; |
| GXFContext *gxf = s->priv_data; |
| GXFStreamContext *vsc = NULL; |
| uint8_t tracks[255] = {0}; |
| int i, media_info = 0; |
| |
| if (url_is_streamed(pb)) { |
| av_log(s, AV_LOG_ERROR, "gxf muxer does not support streamed output, patch welcome"); |
| return -1; |
| } |
| |
| gxf->flags |= 0x00080000; /* material is simple clip */ |
| for (i = 0; i < s->nb_streams; ++i) { |
| AVStream *st = s->streams[i]; |
| GXFStreamContext *sc = av_mallocz(sizeof(*sc)); |
| if (!sc) |
| return AVERROR(ENOMEM); |
| st->priv_data = sc; |
| |
| sc->media_type = codec_get_tag(gxf_media_types, st->codec->codec_id); |
| if (st->codec->codec_type == CODEC_TYPE_AUDIO) { |
| if (st->codec->codec_id != CODEC_ID_PCM_S16LE) { |
| av_log(s, AV_LOG_ERROR, "only 16 BIT PCM LE allowed for now\n"); |
| return -1; |
| } |
| if (st->codec->sample_rate != 48000) { |
| av_log(s, AV_LOG_ERROR, "only 48000hz sampling rate is allowed\n"); |
| return -1; |
| } |
| if (st->codec->channels != 1) { |
| av_log(s, AV_LOG_ERROR, "only mono tracks are allowed\n"); |
| return -1; |
| } |
| sc->track_type = 2; |
| sc->sample_rate = st->codec->sample_rate; |
| av_set_pts_info(st, 64, 1, sc->sample_rate); |
| sc->sample_size = 16; |
| sc->frame_rate_index = -2; |
| sc->lines_index = -2; |
| sc->fields = -2; |
| gxf->audio_tracks++; |
| gxf->flags |= 0x04000000; /* audio is 16 bit pcm */ |
| media_info = 'A'; |
| } else if (st->codec->codec_type == CODEC_TYPE_VIDEO) { |
| if (i != 0) { |
| av_log(s, AV_LOG_ERROR, "video stream must be the first track\n"); |
| return -1; |
| } |
| /* FIXME check from time_base ? */ |
| if (st->codec->height == 480 || st->codec->height == 512) { /* NTSC or NTSC+VBI */ |
| sc->frame_rate_index = 5; |
| sc->sample_rate = 60; |
| gxf->flags |= 0x00000080; |
| gxf->time_base = (AVRational){ 1001, 60000 }; |
| } else { /* assume PAL */ |
| sc->frame_rate_index = 6; |
| sc->media_type++; |
| sc->sample_rate = 50; |
| gxf->flags |= 0x00000040; |
| gxf->time_base = (AVRational){ 1, 50 }; |
| } |
| av_set_pts_info(st, 64, gxf->time_base.num, gxf->time_base.den); |
| if (gxf_find_lines_index(st) < 0) |
| sc->lines_index = -1; |
| sc->sample_size = st->codec->bit_rate; |
| sc->fields = 2; /* interlaced */ |
| |
| vsc = sc; |
| |
| switch (st->codec->codec_id) { |
| case CODEC_ID_MJPEG: |
| sc->track_type = 1; |
| gxf->flags |= 0x00004000; |
| media_info = 'J'; |
| break; |
| case CODEC_ID_MPEG1VIDEO: |
| sc->track_type = 9; |
| gxf->mpeg_tracks++; |
| media_info = 'L'; |
| break; |
| case CODEC_ID_MPEG2VIDEO: |
| sc->first_gop_closed = -1; |
| sc->track_type = 4; |
| gxf->mpeg_tracks++; |
| gxf->flags |= 0x00008000; |
| media_info = 'M'; |
| break; |
| case CODEC_ID_DVVIDEO: |
| if (st->codec->pix_fmt == PIX_FMT_YUV422P) { |
| sc->media_type += 2; |
| sc->track_type = 6; |
| gxf->flags |= 0x00002000; |
| media_info = 'E'; |
| } else { |
| sc->track_type = 5; |
| gxf->flags |= 0x00001000; |
| media_info = 'D'; |
| } |
| break; |
| default: |
| av_log(s, AV_LOG_ERROR, "video codec not supported\n"); |
| return -1; |
| } |
| } |
| /* FIXME first 10 audio tracks are 0 to 9 next 22 are A to V */ |
| sc->media_info = media_info<<8 | ('0'+tracks[media_info]++); |
| sc->order = s->nb_streams - st->index; |
| } |
| |
| if (ff_audio_interleave_init(s, GXF_samples_per_frame, (AVRational){ 1, 48000 }) < 0) |
| return -1; |
| |
| gxf_init_timecode_track(&gxf->timecode_track, vsc); |
| gxf->flags |= 0x200000; // time code track is non-drop frame |
| |
| gxf_write_map_packet(s, 0); |
| gxf_write_flt_packet(s); |
| gxf_write_umf_packet(s); |
| |
| gxf->packet_count = 3; |
| |
| put_flush_packet(pb); |
| return 0; |
| } |
| |
| static int gxf_write_eos_packet(ByteIOContext *pb) |
| { |
| int64_t pos = url_ftell(pb); |
| |
| gxf_write_packet_header(pb, PKT_EOS); |
| return updatePacketSize(pb, pos); |
| } |
| |
| static int gxf_write_trailer(AVFormatContext *s) |
| { |
| GXFContext *gxf = s->priv_data; |
| ByteIOContext *pb = s->pb; |
| int64_t end; |
| int i; |
| |
| ff_audio_interleave_close(s); |
| |
| gxf_write_eos_packet(pb); |
| end = url_ftell(pb); |
| url_fseek(pb, 0, SEEK_SET); |
| /* overwrite map, flt and umf packets with new values */ |
| gxf_write_map_packet(s, 1); |
| gxf_write_flt_packet(s); |
| gxf_write_umf_packet(s); |
| put_flush_packet(pb); |
| /* update duration in all map packets */ |
| for (i = 1; i < gxf->map_offsets_nb; i++) { |
| url_fseek(pb, gxf->map_offsets[i], SEEK_SET); |
| gxf_write_map_packet(s, 1); |
| put_flush_packet(pb); |
| } |
| |
| url_fseek(pb, end, SEEK_SET); |
| |
| av_freep(&gxf->flt_entries); |
| av_freep(&gxf->map_offsets); |
| |
| return 0; |
| } |
| |
| static int gxf_parse_mpeg_frame(GXFStreamContext *sc, const uint8_t *buf, int size) |
| { |
| uint32_t c=-1; |
| int i; |
| for(i=0; i<size-4 && c!=0x100; i++){ |
| c = (c<<8) + buf[i]; |
| if(c == 0x1B8 && sc->first_gop_closed == -1) /* GOP start code */ |
| sc->first_gop_closed= (buf[i+4]>>6)&1; |
| } |
| return (buf[i+1]>>3)&7; |
| } |
| |
| static int gxf_write_media_preamble(AVFormatContext *s, AVPacket *pkt, int size) |
| { |
| GXFContext *gxf = s->priv_data; |
| ByteIOContext *pb = s->pb; |
| AVStream *st = s->streams[pkt->stream_index]; |
| GXFStreamContext *sc = st->priv_data; |
| unsigned field_nb; |
| /* If the video is frame-encoded, the frame numbers shall be represented by |
| * even field numbers. |
| * see SMPTE360M-2004 6.4.2.1.3 Media field number */ |
| if (st->codec->codec_type == CODEC_TYPE_VIDEO) { |
| field_nb = gxf->nb_fields; |
| } else { |
| field_nb = av_rescale_rnd(pkt->dts, gxf->time_base.den, |
| (int64_t)48000*gxf->time_base.num, AV_ROUND_UP); |
| } |
| |
| put_byte(pb, sc->media_type); |
| put_byte(pb, st->index); |
| put_be32(pb, field_nb); |
| if (st->codec->codec_type == CODEC_TYPE_AUDIO) { |
| put_be16(pb, 0); |
| put_be16(pb, size / 2); |
| } else if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) { |
| int frame_type = gxf_parse_mpeg_frame(sc, pkt->data, pkt->size); |
| if (frame_type == FF_I_TYPE) { |
| put_byte(pb, 0x0d); |
| sc->iframes++; |
| } else if (frame_type == FF_B_TYPE) { |
| put_byte(pb, 0x0f); |
| sc->bframes++; |
| } else { |
| put_byte(pb, 0x0e); |
| sc->pframes++; |
| } |
| put_be24(pb, size); |
| } else if (st->codec->codec_id == CODEC_ID_DVVIDEO) { |
| put_byte(pb, size / 4096); |
| put_be24(pb, 0); |
| } else |
| put_be32(pb, size); |
| put_be32(pb, field_nb); |
| put_byte(pb, 1); /* flags */ |
| put_byte(pb, 0); /* reserved */ |
| return 16; |
| } |
| |
| static int gxf_write_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| GXFContext *gxf = s->priv_data; |
| ByteIOContext *pb = s->pb; |
| AVStream *st = s->streams[pkt->stream_index]; |
| int64_t pos = url_ftell(pb); |
| int padding = 0; |
| |
| gxf_write_packet_header(pb, PKT_MEDIA); |
| if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO && pkt->size % 4) /* MPEG-2 frames must be padded */ |
| padding = 4 - pkt->size % 4; |
| else if (st->codec->codec_type == CODEC_TYPE_AUDIO) |
| padding = GXF_AUDIO_PACKET_SIZE - pkt->size; |
| gxf_write_media_preamble(s, pkt, pkt->size + padding); |
| put_buffer(pb, pkt->data, pkt->size); |
| gxf_write_padding(pb, padding); |
| |
| if (st->codec->codec_type == CODEC_TYPE_VIDEO) { |
| if (!(gxf->flt_entries_nb % 500)) { |
| gxf->flt_entries = av_realloc(gxf->flt_entries, |
| (gxf->flt_entries_nb+500)*sizeof(*gxf->flt_entries)); |
| if (!gxf->flt_entries) { |
| av_log(s, AV_LOG_ERROR, "could not reallocate flt entries\n"); |
| return -1; |
| } |
| } |
| gxf->flt_entries[gxf->flt_entries_nb++] = url_ftell(pb) / 1024; |
| gxf->nb_fields += 2; // count fields |
| } |
| |
| updatePacketSize(pb, pos); |
| |
| gxf->packet_count++; |
| if (gxf->packet_count == 100) { |
| gxf_write_map_packet(s, 0); |
| gxf->packet_count = 0; |
| } |
| |
| put_flush_packet(pb); |
| |
| return 0; |
| } |
| |
| static int gxf_compare_field_nb(AVFormatContext *s, AVPacket *next, AVPacket *cur) |
| { |
| GXFContext *gxf = s->priv_data; |
| AVPacket *pkt[2] = { cur, next }; |
| int i, field_nb[2]; |
| GXFStreamContext *sc[2]; |
| |
| for (i = 0; i < 2; i++) { |
| AVStream *st = s->streams[pkt[i]->stream_index]; |
| sc[i] = st->priv_data; |
| if (st->codec->codec_type == CODEC_TYPE_AUDIO) { |
| field_nb[i] = av_rescale_rnd(pkt[i]->dts, gxf->time_base.den, |
| (int64_t)48000*gxf->time_base.num, AV_ROUND_UP); |
| field_nb[i] &= ~1; // compare against even field number because audio must be before video |
| } else |
| field_nb[i] = pkt[i]->dts; // dts are field based |
| } |
| |
| return field_nb[1] > field_nb[0] || |
| (field_nb[1] == field_nb[0] && sc[1]->order > sc[0]->order); |
| } |
| |
| static int gxf_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush) |
| { |
| if (pkt && s->streams[pkt->stream_index]->codec->codec_type == CODEC_TYPE_VIDEO) |
| pkt->duration = 2; // enforce 2 fields |
| return ff_audio_rechunk_interleave(s, out, pkt, flush, |
| av_interleave_packet_per_dts, gxf_compare_field_nb); |
| } |
| |
| AVOutputFormat gxf_muxer = { |
| "gxf", |
| NULL_IF_CONFIG_SMALL("GXF format"), |
| NULL, |
| "gxf", |
| sizeof(GXFContext), |
| CODEC_ID_PCM_S16LE, |
| CODEC_ID_MPEG2VIDEO, |
| gxf_write_header, |
| gxf_write_packet, |
| gxf_write_trailer, |
| 0, |
| NULL, |
| gxf_interleave_packet, |
| }; |
