| /* |
| * 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; |
| AVCodecContext *codec; |
| uint32_t track_type; |
| uint32_t sample_size; |
| uint32_t sample_rate; |
| uint16_t media_type; |
| uint16_t media_info; |
| uint8_t index; |
| 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; |
| int64_t current_dts; |
| int dts_delay; |
| } GXFStreamContext; |
| |
| typedef struct GXFContext { |
| uint32_t nb_fields; |
| uint32_t material_flags; |
| 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_user_data_offset; |
| uint32_t umf_user_data_size; |
| uint32_t umf_length; |
| uint16_t umf_track_size; |
| uint16_t umf_media_size; |
| int audio_written; |
| int sample_rate; |
| int flags; |
| AVFormatContext *fc; |
| } GXFContext; |
| |
| typedef struct GXF_Lines { |
| int height; |
| int index; |
| } GXF_Lines; |
| |
| |
| /* FIXME check if it is relevant */ |
| static const GXF_Lines 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 "/space/" |
| #define ES_NAME_PATTERN "ES." |
| |
| static int gxf_find_lines_index(GXFStreamContext *ctx) |
| { |
| int i; |
| |
| for (i = 0; i < 6; ++i) { |
| if (ctx->codec->height == gxf_lines_tab[i].height) { |
| ctx->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, GXFStreamContext *ctx) |
| { |
| char buffer[1024]; |
| int size, starting_line; |
| |
| if (ctx->iframes) { |
| ctx->p_per_gop = ctx->pframes / ctx->iframes; |
| if (ctx->pframes % ctx->iframes) |
| ctx->p_per_gop++; |
| if (ctx->pframes) { |
| ctx->b_per_i_or_p = ctx->bframes / ctx->pframes; |
| if (ctx->bframes % ctx->pframes) |
| ctx->b_per_i_or_p++; |
| } |
| if (ctx->p_per_gop > 9) |
| ctx->p_per_gop = 9; /* ensure value won't take more than one char */ |
| if (ctx->b_per_i_or_p > 9) |
| ctx->b_per_i_or_p = 9; /* ensure value won't take more than one char */ |
| } |
| if (ctx->codec->height == 512 || ctx->codec->height == 608) |
| starting_line = 7; // VBI |
| else if (ctx->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)ctx->codec->bit_rate, ctx->p_per_gop, ctx->b_per_i_or_p, |
| ctx->codec->pix_fmt == PIX_FMT_YUV422P ? 2 : 1, ctx->first_gop_closed == 1, |
| starting_line, ctx->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 *ctx) |
| { |
| /* FIXME implement that */ |
| 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(ByteIOContext *pb, GXFStreamContext *stream) |
| { |
| int64_t pos; |
| |
| /* track description section */ |
| put_byte(pb, stream->media_type + 0x80); |
| put_byte(pb, stream->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, stream->media_info); |
| put_byte(pb, 0); |
| |
| if (stream->codec->codec_id != CODEC_ID_MPEG2VIDEO) { |
| /* auxiliary information */ |
| put_byte(pb, TRACK_AUX); |
| put_byte(pb, 8); |
| if (stream->codec->codec_id == CODEC_ID_NONE) |
| gxf_write_timecode_auxiliary(pb, stream); |
| else |
| put_le64(pb, 0); |
| } |
| |
| /* file system version */ |
| put_byte(pb, TRACK_VER); |
| put_byte(pb, 4); |
| put_be32(pb, 0); |
| |
| if (stream->codec->codec_id == CODEC_ID_MPEG2VIDEO) |
| gxf_write_mpeg_auxiliary(pb, stream); |
| |
| /* frame rate */ |
| put_byte(pb, TRACK_FPS); |
| put_byte(pb, 4); |
| put_be32(pb, stream->frame_rate_index); |
| |
| /* lines per frame */ |
| put_byte(pb, TRACK_LINES); |
| put_byte(pb, 4); |
| put_be32(pb, stream->lines_index); |
| |
| /* fields per frame */ |
| put_byte(pb, TRACK_FPF); |
| put_byte(pb, 4); |
| put_be32(pb, stream->fields); |
| |
| return updateSize(pb, pos); |
| } |
| |
| static int gxf_write_material_data_section(ByteIOContext *pb, GXFContext *ctx) |
| { |
| int64_t pos; |
| const char *filename = strrchr(ctx->fc->filename, '/'); |
| |
| pos = url_ftell(pb); |
| put_be16(pb, 0); /* size */ |
| |
| /* name */ |
| if (filename) |
| filename++; |
| else |
| filename = ctx->fc->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, ctx->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, ctx->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(ByteIOContext *pb, GXFContext *ctx) |
| { |
| int64_t pos; |
| int i; |
| |
| pos = url_ftell(pb); |
| put_be16(pb, 0); /* size */ |
| for (i = 0; i < ctx->fc->nb_streams; ++i) |
| gxf_write_track_description(pb, ctx->fc->streams[i]->priv_data); |
| return updateSize(pb, pos); |
| } |
| |
| static int gxf_write_map_packet(ByteIOContext *pb, GXFContext *ctx) |
| { |
| int64_t pos = url_ftell(pb); |
| |
| gxf_write_packet_header(pb, PKT_MAP); |
| |
| /* preamble */ |
| put_byte(pb, 0xE0); /* version */ |
| put_byte(pb, 0xFF); /* reserved */ |
| |
| gxf_write_material_data_section(pb, ctx); |
| gxf_write_track_description_section(pb, ctx); |
| |
| return updatePacketSize(pb, pos); |
| } |
| |
| #if 0 |
| static int gxf_write_flt_packet(ByteIOContext *pb, GXFContext *ctx) |
| { |
| int64_t pos = url_ftell(pb); |
| int i; |
| |
| gxf_write_packet_header(pb, PKT_FLT); |
| |
| put_le32(pb, 1000); /* number of fields */ |
| put_le32(pb, 0); /* number of active flt entries */ |
| |
| for (i = 0; i < 1000; ++i) { |
| put_le32(pb, 0); |
| } |
| return updatePacketSize(pb, pos); |
| } |
| #endif |
| |
| static int gxf_write_umf_material_description(ByteIOContext *pb, GXFContext *ctx) |
| { |
| // XXX drop frame |
| uint32_t timecode = |
| ctx->nb_fields / (ctx->sample_rate * 3600) % 24 << 24 | // hours |
| ctx->nb_fields / (ctx->sample_rate * 60) % 60 << 16 | // minutes |
| ctx->nb_fields / ctx->sample_rate % 60 << 8 | // seconds |
| ctx->nb_fields % ctx->sample_rate; // fields |
| |
| put_le32(pb, ctx->flags); |
| put_le32(pb, ctx->nb_fields); /* length of the longest track */ |
| put_le32(pb, ctx->nb_fields); /* length of the shortest track */ |
| put_le32(pb, 0); /* mark in */ |
| put_le32(pb, ctx->nb_fields); /* mark out */ |
| put_le32(pb, 0); /* timecode mark in */ |
| put_le32(pb, timecode); /* timecode mark out */ |
| put_le64(pb, ctx->fc->timestamp); /* modification time */ |
| put_le64(pb, ctx->fc->timestamp); /* creation time */ |
| put_le16(pb, 0); /* reserved */ |
| put_le16(pb, 0); /* reserved */ |
| put_le16(pb, ctx->audio_tracks); |
| put_le16(pb, 0); /* timecode track count */ |
| put_le16(pb, 0); /* reserved */ |
| put_le16(pb, ctx->mpeg_tracks); |
| return 48; |
| } |
| |
| static int gxf_write_umf_payload(ByteIOContext *pb, GXFContext *ctx) |
| { |
| put_le32(pb, ctx->umf_length); /* total length of the umf data */ |
| put_le32(pb, 3); /* version */ |
| put_le32(pb, ctx->fc->nb_streams); |
| put_le32(pb, ctx->umf_track_offset); /* umf track section offset */ |
| put_le32(pb, ctx->umf_track_size); |
| put_le32(pb, ctx->fc->nb_streams); |
| put_le32(pb, ctx->umf_media_offset); |
| put_le32(pb, ctx->umf_media_size); |
| put_le32(pb, ctx->umf_user_data_offset); /* user data offset */ |
| put_le32(pb, ctx->umf_user_data_size); /* user data size */ |
| put_le32(pb, 0); /* reserved */ |
| put_le32(pb, 0); /* reserved */ |
| return 48; |
| } |
| |
| static int gxf_write_umf_track_description(ByteIOContext *pb, GXFContext *ctx) |
| { |
| int64_t pos = url_ftell(pb); |
| int tracks[255]={0}; |
| int i; |
| |
| ctx->umf_track_offset = pos - ctx->umf_start_offset; |
| for (i = 0; i < ctx->fc->nb_streams; ++i) { |
| AVStream *st = ctx->fc->streams[i]; |
| GXFStreamContext *sc = st->priv_data; |
| int id = 0; |
| |
| switch (st->codec->codec_id) { |
| case CODEC_ID_MPEG1VIDEO: id= 'L'; break; |
| case CODEC_ID_MPEG2VIDEO: id= 'M'; break; |
| case CODEC_ID_PCM_S16LE: id= 'A'; break; |
| case CODEC_ID_DVVIDEO: id= sc->track_type == 6 ? 'E' : 'D'; break; |
| case CODEC_ID_MJPEG: id= 'V'; break; |
| default: break; |
| } |
| sc->media_info= id << 8; |
| /* FIXME first 10 audio tracks are 0 to 9 next 22 are A to V */ |
| sc->media_info |= '0' + (tracks[id]++); |
| put_le16(pb, sc->media_info); |
| put_le16(pb, 1); |
| } |
| return url_ftell(pb) - pos; |
| } |
| |
| static int gxf_write_umf_media_mpeg(ByteIOContext *pb, GXFStreamContext *stream) |
| { |
| if (stream->codec->pix_fmt == PIX_FMT_YUV422P) |
| put_le32(pb, 2); |
| else |
| put_le32(pb, 1); /* default to 420 */ |
| put_le32(pb, stream->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, stream->p_per_gop); |
| put_le32(pb, stream->b_per_i_or_p); |
| if (stream->codec->codec_id == CODEC_ID_MPEG2VIDEO) |
| put_le32(pb, 2); |
| else if (stream->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 *track) |
| { |
| /* FIXME implement */ |
| put_be32(pb, 0); /* drop frame flag */ |
| put_be32(pb, 0); /* reserved */ |
| put_be32(pb, 0); /* reserved */ |
| put_be32(pb, 0); /* reserved */ |
| put_be32(pb, 0); /* reserved */ |
| put_be32(pb, 0); /* reserved */ |
| put_be32(pb, 0); /* reserved */ |
| put_be32(pb, 0); /* reserved */ |
| return 32; |
| } |
| |
| static int gxf_write_umf_media_dv(ByteIOContext *pb, GXFStreamContext *track) |
| { |
| int i; |
| |
| for (i = 0; i < 8; i++) { |
| put_be32(pb, 0); |
| } |
| return 32; |
| } |
| |
| static int gxf_write_umf_media_audio(ByteIOContext *pb, GXFStreamContext *track) |
| { |
| 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 *track) |
| { |
| 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(ByteIOContext *pb, GXFContext *ctx) |
| { |
| int64_t pos; |
| int i; |
| |
| pos = url_ftell(pb); |
| ctx->umf_media_offset = pos - ctx->umf_start_offset; |
| for (i = 0; i < ctx->fc->nb_streams; ++i) { |
| GXFStreamContext *sc = ctx->fc->streams[i]->priv_data; |
| char buffer[88]; |
| int64_t startpos, curpos; |
| int path_size = strlen(ES_NAME_PATTERN); |
| |
| memset(buffer, 0, 88); |
| 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, ctx->nb_fields); |
| put_le32(pb, 0); /* attributes rw, ro */ |
| put_le32(pb, 0); /* mark in */ |
| put_le32(pb, ctx->nb_fields); /* mark out */ |
| strncpy(buffer, ES_NAME_PATTERN, path_size); |
| put_buffer(pb, (uint8_t *)buffer, path_size); |
| put_be16(pb, sc->media_info); |
| put_buffer(pb, (uint8_t *)buffer + path_size + 2, 88 - path_size - 2); |
| put_le32(pb, sc->track_type); |
| put_le32(pb, sc->sample_rate); |
| put_le32(pb, sc->sample_size); |
| put_le32(pb, 0); /* reserved */ |
| switch (sc->codec->codec_id) { |
| case CODEC_ID_MPEG2VIDEO: |
| gxf_write_umf_media_mpeg(pb, sc); |
| 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; |
| default: |
| gxf_write_umf_media_timecode(pb, sc); /* 8 0bytes */ |
| } |
| 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_user_data(ByteIOContext *pb, GXFContext *ctx) |
| { |
| int64_t pos = url_ftell(pb); |
| ctx->umf_user_data_offset = pos - ctx->umf_start_offset; |
| put_le32(pb, 20); |
| put_le32(pb, 0); |
| put_le16(pb, 0); |
| put_le16(pb, 0); |
| put_le32(pb, 0); |
| put_byte(pb, 0); |
| put_byte(pb, 0); |
| put_byte(pb, 0); |
| put_byte(pb, 0); |
| return 20; |
| } |
| |
| static int gxf_write_umf_packet(ByteIOContext *pb, GXFContext *ctx) |
| { |
| 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, ctx->umf_length); /* data length */ |
| |
| ctx->umf_start_offset = url_ftell(pb); |
| gxf_write_umf_payload(pb, ctx); |
| gxf_write_umf_material_description(pb, ctx); |
| ctx->umf_track_size = gxf_write_umf_track_description(pb, ctx); |
| ctx->umf_media_size = gxf_write_umf_media_description(pb, ctx); |
| ctx->umf_user_data_size = gxf_write_umf_user_data(pb, ctx); |
| ctx->umf_length = url_ftell(pb) - ctx->umf_start_offset; |
| return updatePacketSize(pb, pos); |
| } |
| |
| #define GXF_NODELAY -5000 |
| |
| static const int GXF_samples_per_frame[] = { 32768, 0 }; |
| |
| static int gxf_write_header(AVFormatContext *s) |
| { |
| ByteIOContext *pb = s->pb; |
| GXFContext *gxf = s->priv_data; |
| int i; |
| |
| gxf->fc = s; |
| 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->codec = st->codec; |
| sc->index = i; |
| sc->media_type = codec_get_tag(gxf_media_types, sc->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 */ |
| } else if (sc->codec->codec_type == CODEC_TYPE_VIDEO) { |
| /* FIXME check from time_base ? */ |
| if (sc->codec->height == 480 || sc->codec->height == 512) { /* NTSC or NTSC+VBI */ |
| sc->frame_rate_index = 5; |
| sc->sample_rate = 60; |
| gxf->flags |= 0x00000080; |
| } else { /* assume PAL */ |
| sc->frame_rate_index = 6; |
| sc->media_type++; |
| sc->sample_rate = 50; |
| gxf->flags |= 0x00000040; |
| } |
| gxf->sample_rate = sc->sample_rate; |
| av_set_pts_info(st, 64, 1, st->codec->time_base.den); |
| sc->dts_delay = GXF_NODELAY; |
| if (gxf_find_lines_index(sc) < 0) |
| sc->lines_index = -1; |
| sc->sample_size = st->codec->bit_rate; |
| sc->fields = 2; /* interlaced */ |
| switch (sc->codec->codec_id) { |
| case CODEC_ID_MPEG2VIDEO: |
| sc->first_gop_closed = -1; |
| sc->track_type = 4; |
| gxf->mpeg_tracks++; |
| gxf->flags |= 0x00008000; |
| break; |
| case CODEC_ID_DVVIDEO: |
| if (sc->codec->pix_fmt == PIX_FMT_YUV422P) { |
| sc->media_type += 2; |
| sc->track_type = 6; |
| gxf->flags |= 0x00002000; |
| } else { |
| sc->track_type = 5; |
| gxf->flags |= 0x00001000; |
| } |
| break; |
| default: |
| av_log(s, AV_LOG_ERROR, "video codec not supported\n"); |
| return -1; |
| } |
| } |
| } |
| |
| if (ff_audio_interleave_init(s, GXF_samples_per_frame, (AVRational){ 1, 48000 }) < 0) |
| return -1; |
| |
| gxf_write_map_packet(pb, gxf); |
| //gxf_write_flt_packet(pb, gxf); |
| gxf_write_umf_packet(pb, gxf); |
| put_flush_packet(pb); |
| return 0; |
| } |
| |
| static int gxf_write_eos_packet(ByteIOContext *pb, GXFContext *ctx) |
| { |
| int64_t pos = url_ftell(pb); |
| |
| gxf_write_packet_header(pb, PKT_EOS); |
| return updatePacketSize(pb, pos); |
| } |
| |
| static int gxf_write_trailer(AVFormatContext *s) |
| { |
| ByteIOContext *pb = s->pb; |
| GXFContext *gxf = s->priv_data; |
| int64_t end; |
| |
| ff_audio_interleave_close(s); |
| |
| gxf_write_eos_packet(pb, gxf); |
| end = url_ftell(pb); |
| url_fseek(pb, 0, SEEK_SET); |
| /* overwrite map and umf packets with new values */ |
| gxf_write_map_packet(pb, gxf); |
| //gxf_write_flt_packet(pb, gxf); |
| gxf_write_umf_packet(pb, gxf); |
| url_fseek(pb, end, SEEK_SET); |
| 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(ByteIOContext *pb, GXFContext *ctx, AVPacket *pkt, int size) |
| { |
| GXFStreamContext *sc = ctx->fc->streams[pkt->stream_index]->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 (sc->codec->codec_type == CODEC_TYPE_VIDEO) { |
| field_nb = ctx->nb_fields; |
| } else { |
| field_nb = av_rescale_rnd(pkt->dts, ctx->sample_rate, sc->codec->time_base.den, AV_ROUND_UP); |
| } |
| |
| put_byte(pb, sc->media_type); |
| put_byte(pb, sc->index); |
| put_be32(pb, field_nb); |
| if (sc->codec->codec_type == CODEC_TYPE_AUDIO) { |
| put_be16(pb, 0); |
| put_be16(pb, size / 2); |
| } else if (sc->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 (sc->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_media_packet(ByteIOContext *pb, GXFContext *ctx, AVPacket *pkt) |
| { |
| GXFStreamContext *sc = ctx->fc->streams[pkt->stream_index]->priv_data; |
| int64_t pos = url_ftell(pb); |
| int padding = 0; |
| |
| gxf_write_packet_header(pb, PKT_MEDIA); |
| if (sc->codec->codec_id == CODEC_ID_MPEG2VIDEO && pkt->size % 4) /* MPEG-2 frames must be padded */ |
| padding = 4 - pkt->size % 4; |
| else if (sc->codec->codec_type == CODEC_TYPE_AUDIO) |
| padding = GXF_AUDIO_PACKET_SIZE - pkt->size; |
| gxf_write_media_preamble(pb, ctx, pkt, pkt->size + padding); |
| put_buffer(pb, pkt->data, pkt->size); |
| gxf_write_padding(pb, padding); |
| |
| if (sc->codec->codec_type == CODEC_TYPE_VIDEO) |
| ctx->nb_fields += 2; // count fields |
| |
| return updatePacketSize(pb, pos); |
| } |
| |
| static int gxf_write_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| GXFContext *gxf = s->priv_data; |
| |
| gxf_write_media_packet(s->pb, gxf, pkt); |
| put_flush_packet(s->pb); |
| return 0; |
| } |
| |
| static int gxf_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush) |
| { |
| return ff_audio_rechunk_interleave(s, out, pkt, flush, |
| av_interleave_packet_per_dts, ff_interleave_compare_dts); |
| } |
| |
| 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, |
| }; |
