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- /*
- * 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,
- };
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