3 * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/fifo.h"
27 #define GXF_AUDIO_PACKET_SIZE 65536
29 typedef struct GXFStreamContext {
30 AVCodecContext *codec;
31 AVFifoBuffer audio_buffer;
51 typedef struct GXFContext {
53 uint32_t material_flags;
54 uint16_t audio_tracks;
56 int64_t creation_time;
57 uint32_t umf_start_offset;
58 uint32_t umf_track_offset;
59 uint32_t umf_media_offset;
60 uint32_t umf_user_data_offset;
61 uint32_t umf_user_data_size;
63 uint16_t umf_track_size;
64 uint16_t umf_media_size;
69 GXFStreamContext streams[48];
72 typedef struct GXF_Lines {
78 /* FIXME check if it is relevant */
79 static const GXF_Lines gxf_lines_tab[] = {
80 { 480, 1 }, /* NTSC */
81 { 512, 1 }, /* NTSC + VBI */
83 { 608, 2 }, /* PAL + VBI */
88 static const AVCodecTag gxf_media_types[] = {
89 { CODEC_ID_MJPEG , 3 }, /* NTSC */
90 { CODEC_ID_MJPEG , 4 }, /* PAL */
91 { CODEC_ID_PCM_S24LE , 9 },
92 { CODEC_ID_PCM_S16LE , 10 },
93 { CODEC_ID_MPEG2VIDEO, 11 }, /* NTSC */
94 { CODEC_ID_MPEG2VIDEO, 12 }, /* PAL */
95 { CODEC_ID_DVVIDEO , 13 }, /* NTSC */
96 { CODEC_ID_DVVIDEO , 14 }, /* PAL */
97 { CODEC_ID_DVVIDEO , 15 }, /* 50M NTSC */
98 { CODEC_ID_DVVIDEO , 16 }, /* 50M PAL */
99 { CODEC_ID_AC3 , 17 },
100 //{ CODEC_ID_NONE, , 18 }, /* Non compressed 24 bit audio */
101 { CODEC_ID_MPEG2VIDEO, 20 }, /* MPEG HD */
102 { CODEC_ID_MPEG1VIDEO, 22 }, /* NTSC */
103 { CODEC_ID_MPEG1VIDEO, 23 }, /* PAL */
107 #define SERVER_PATH "/space/"
108 #define ES_NAME_PATTERN "ES."
110 static int gxf_find_lines_index(GXFStreamContext *ctx)
114 for (i = 0; i < 6; ++i) {
115 if (ctx->codec->height == gxf_lines_tab[i].height) {
116 ctx->lines_index = gxf_lines_tab[i].index;
123 static void gxf_write_padding(ByteIOContext *pb, int64_t to_pad)
125 for (; to_pad > 0; to_pad--) {
130 static int64_t updatePacketSize(ByteIOContext *pb, int64_t pos)
135 size = url_ftell(pb) - pos;
137 gxf_write_padding(pb, 4 - size % 4);
138 size = url_ftell(pb) - pos;
140 curpos = url_ftell(pb);
141 url_fseek(pb, pos + 6, SEEK_SET);
143 url_fseek(pb, curpos, SEEK_SET);
147 static int64_t updateSize(ByteIOContext *pb, int64_t pos)
151 curpos = url_ftell(pb);
152 url_fseek(pb, pos, SEEK_SET);
153 put_be16(pb, curpos - pos - 2);
154 url_fseek(pb, curpos, SEEK_SET);
158 static void gxf_write_packet_header(ByteIOContext *pb, GXFPktType type)
160 put_be32(pb, 0); /* packet leader for synchro */
162 put_byte(pb, type); /* map packet */
163 put_be32(pb, 0); /* size */
164 put_be32(pb, 0); /* reserved */
165 put_byte(pb, 0xE1); /* trailer 1 */
166 put_byte(pb, 0xE2); /* trailer 2 */
169 static int gxf_write_mpeg_auxiliary(ByteIOContext *pb, GXFStreamContext *ctx)
175 ctx->p_per_gop = ctx->pframes / ctx->iframes;
176 if (ctx->pframes % ctx->iframes)
179 ctx->b_per_gop = ctx->bframes / ctx->pframes;
180 if (ctx->p_per_gop > 9)
181 ctx->p_per_gop = 9; /* ensure value won't take more than one char */
182 if (ctx->b_per_gop > 9)
183 ctx->b_per_gop = 9; /* ensure value won't take more than one char */
185 size = snprintf(buffer, 1024, "Ver 1\nBr %.6f\nIpg 1\nPpi %d\nBpiop %d\n"
186 "Pix 0\nCf %d\nCg %d\nSl 7\nnl16 %d\nVi 1\nf1 1\n",
187 (float)ctx->codec->bit_rate, ctx->p_per_gop, ctx->b_per_gop,
188 ctx->codec->pix_fmt == PIX_FMT_YUV422P ? 2 : 1, ctx->first_gop_closed == 1,
189 ctx->codec->height / 16);
190 put_byte(pb, TRACK_MPG_AUX);
191 put_byte(pb, size + 1);
192 put_buffer(pb, (uint8_t *)buffer, size + 1);
196 static int gxf_write_timecode_auxiliary(ByteIOContext *pb, GXFStreamContext *ctx)
198 /* FIXME implement that */
199 put_byte(pb, 0); /* fields */
200 put_byte(pb, 0); /* seconds */
201 put_byte(pb, 0); /* minutes */
202 put_byte(pb, 0); /* flags + hours */
208 static int gxf_write_track_description(ByteIOContext *pb, GXFStreamContext *stream)
212 /* track description section */
213 put_byte(pb, stream->media_type + 0x80);
214 put_byte(pb, stream->index + 0xC0);
217 put_be16(pb, 0); /* size */
219 /* media file name */
220 put_byte(pb, TRACK_NAME);
221 put_byte(pb, strlen(ES_NAME_PATTERN) + 3);
222 put_tag(pb, ES_NAME_PATTERN);
223 put_be16(pb, stream->media_info);
226 if (stream->codec->codec_id != CODEC_ID_MPEG2VIDEO) {
227 /* auxiliary information */
228 put_byte(pb, TRACK_AUX);
230 if (stream->codec->codec_id == CODEC_ID_NONE)
231 gxf_write_timecode_auxiliary(pb, stream);
236 /* file system version */
237 put_byte(pb, TRACK_VER);
241 if (stream->codec->codec_id == CODEC_ID_MPEG2VIDEO)
242 gxf_write_mpeg_auxiliary(pb, stream);
245 put_byte(pb, TRACK_FPS);
247 put_be32(pb, stream->frame_rate_index);
249 /* lines per frame */
250 put_byte(pb, TRACK_LINES);
252 put_be32(pb, stream->lines_index);
254 /* fields per frame */
255 put_byte(pb, TRACK_FPF);
257 put_be32(pb, stream->fields);
259 return updateSize(pb, pos);
262 static int gxf_write_material_data_section(ByteIOContext *pb, GXFContext *ctx)
265 const char *filename = strrchr(ctx->fc->filename, '/');
268 put_be16(pb, 0); /* size */
274 filename = ctx->fc->filename;
275 put_byte(pb, MAT_NAME);
276 put_byte(pb, strlen(SERVER_PATH) + strlen(filename) + 1);
277 put_tag(pb, SERVER_PATH);
278 put_tag(pb, filename);
282 put_byte(pb, MAT_FIRST_FIELD);
287 put_byte(pb, MAT_LAST_FIELD);
289 put_be32(pb, ctx->nb_frames);
292 put_byte(pb, MAT_MARK_IN);
296 put_byte(pb, MAT_MARK_OUT);
298 put_be32(pb, ctx->nb_frames);
301 put_byte(pb, MAT_SIZE);
303 put_be32(pb, url_fsize(pb) / 1024);
305 return updateSize(pb, pos);
308 static int gxf_write_track_description_section(ByteIOContext *pb, GXFContext *ctx)
314 put_be16(pb, 0); /* size */
315 for (i = 0; i < ctx->fc->nb_streams; ++i)
316 gxf_write_track_description(pb, &ctx->streams[i]);
317 return updateSize(pb, pos);
320 static int gxf_write_map_packet(ByteIOContext *pb, GXFContext *ctx)
322 int64_t pos = url_ftell(pb);
324 gxf_write_packet_header(pb, PKT_MAP);
327 put_byte(pb, 0xE0); /* version */
328 put_byte(pb, 0xFF); /* reserved */
330 gxf_write_material_data_section(pb, ctx);
331 gxf_write_track_description_section(pb, ctx);
333 return updatePacketSize(pb, pos);
337 static int gxf_write_flt_packet(ByteIOContext *pb, GXFContext *ctx)
339 int64_t pos = url_ftell(pb);
342 gxf_write_packet_header(pb, PKT_FLT);
344 put_le32(pb, 1000); /* number of fields */
345 put_le32(pb, 0); /* number of active flt entries */
347 for (i = 0; i < 1000; ++i) {
350 return updatePacketSize(pb, pos);
354 static int gxf_write_umf_material_description(ByteIOContext *pb, GXFContext *ctx)
357 int fps = ctx->sample_rate / 2;
358 int frames = ctx->nb_frames / 2;
360 frames % fps << 24 | // frames
361 frames / fps % 60 << 16 | // seconds
362 frames / fps * 60 % 60 << 8 | // minutes
363 frames / fps * 3600 % 24 << 3; // hours
365 put_le32(pb, ctx->flags);
366 put_le32(pb, ctx->nb_frames); /* length of the longest track */
367 put_le32(pb, ctx->nb_frames); /* length of the shortest track */
368 put_le32(pb, 0); /* mark in */
369 put_le32(pb, ctx->nb_frames); /* mark out */
370 put_le32(pb, 0); /* timecode mark in */
371 put_le32(pb, timecode); /* timecode mark out */
372 put_le64(pb, ctx->fc->timestamp); /* modification time */
373 put_le64(pb, ctx->fc->timestamp); /* creation time */
374 put_le16(pb, 0); /* reserved */
375 put_le16(pb, 0); /* reserved */
376 put_le16(pb, ctx->audio_tracks);
377 put_le16(pb, 0); /* timecode track count */
378 put_le16(pb, 0); /* reserved */
379 put_le16(pb, ctx->mpeg_tracks);
383 static int gxf_write_umf_payload(ByteIOContext *pb, GXFContext *ctx)
385 put_le32(pb, ctx->umf_length); /* total length of the umf data */
386 put_le32(pb, 3); /* version */
387 put_le32(pb, ctx->fc->nb_streams);
388 put_le32(pb, ctx->umf_track_offset); /* umf track section offset */
389 put_le32(pb, ctx->umf_track_size);
390 put_le32(pb, ctx->fc->nb_streams);
391 put_le32(pb, ctx->umf_media_offset);
392 put_le32(pb, ctx->umf_media_size);
393 put_le32(pb, ctx->umf_user_data_offset); /* user data offset */
394 put_le32(pb, ctx->umf_user_data_size); /* user data size */
395 put_le32(pb, 0); /* reserved */
396 put_le32(pb, 0); /* reserved */
400 static int gxf_write_umf_track_description(ByteIOContext *pb, GXFContext *ctx)
402 int64_t pos = url_ftell(pb);
406 ctx->umf_track_offset = pos - ctx->umf_start_offset;
407 for (i = 0; i < ctx->fc->nb_streams; ++i) {
408 AVStream *st = ctx->fc->streams[i];
409 GXFStreamContext *sc = &ctx->streams[i];
412 switch (st->codec->codec_id) {
413 case CODEC_ID_MPEG1VIDEO: id= 'L'; break;
414 case CODEC_ID_MPEG2VIDEO: id= 'M'; break;
415 case CODEC_ID_PCM_S16LE: id= 'A'; break;
416 case CODEC_ID_DVVIDEO: id= sc->track_type == 6 ? 'E' : 'D'; break;
417 case CODEC_ID_MJPEG: id= 'V'; break;
420 sc->media_info= id << 8;
421 /* FIXME first 10 audio tracks are 0 to 9 next 22 are A to V */
422 sc->media_info |= '0' + (tracks[id]++);
423 put_le16(pb, sc->media_info);
426 return url_ftell(pb) - pos;
429 static int gxf_write_umf_media_mpeg(ByteIOContext *pb, GXFStreamContext *stream)
431 if (stream->codec->pix_fmt == PIX_FMT_YUV422P)
434 put_le32(pb, 1); /* default to 420 */
435 put_le32(pb, stream->first_gop_closed == 1); /* closed = 1, open = 0, unknown = 255 */
436 put_le32(pb, 3); /* top = 1, bottom = 2, frame = 3, unknown = 0 */
437 put_le32(pb, 1); /* I picture per GOP */
438 put_le32(pb, stream->p_per_gop);
439 put_le32(pb, stream->b_per_gop);
440 if (stream->codec->codec_id == CODEC_ID_MPEG2VIDEO)
442 else if (stream->codec->codec_id == CODEC_ID_MPEG1VIDEO)
446 put_le32(pb, 0); /* reserved */
450 static int gxf_write_umf_media_timecode(ByteIOContext *pb, GXFStreamContext *track)
452 /* FIXME implement */
453 put_be32(pb, 0); /* drop frame flag */
454 put_be32(pb, 0); /* reserved */
455 put_be32(pb, 0); /* reserved */
456 put_be32(pb, 0); /* reserved */
457 put_be32(pb, 0); /* reserved */
458 put_be32(pb, 0); /* reserved */
459 put_be32(pb, 0); /* reserved */
460 put_be32(pb, 0); /* reserved */
464 static int gxf_write_umf_media_dv(ByteIOContext *pb, GXFStreamContext *track)
468 for (i = 0; i < 8; i++) {
474 static int gxf_write_umf_media_audio(ByteIOContext *pb, GXFStreamContext *track)
476 put_le64(pb, av_dbl2int(1)); /* sound level to begin to */
477 put_le64(pb, av_dbl2int(1)); /* sound level to begin to */
478 put_le32(pb, 0); /* number of fields over which to ramp up sound level */
479 put_le32(pb, 0); /* number of fields over which to ramp down sound level */
480 put_le32(pb, 0); /* reserved */
481 put_le32(pb, 0); /* reserved */
486 static int gxf_write_umf_media_mjpeg(ByteIOContext *pb, GXFStreamContext *track)
488 put_be64(pb, 0); /* FIXME FLOAT max chroma quant level */
489 put_be64(pb, 0); /* FIXME FLOAT max luma quant level */
490 put_be64(pb, 0); /* FIXME FLOAT min chroma quant level */
491 put_be64(pb, 0); /* FIXME FLOAT min luma quant level */
496 static int gxf_write_umf_media_description(ByteIOContext *pb, GXFContext *ctx)
502 ctx->umf_media_offset = pos - ctx->umf_start_offset;
503 for (i = 0; i < ctx->fc->nb_streams; ++i) {
504 GXFStreamContext *sc = &ctx->streams[i];
506 int64_t startpos, curpos;
507 int path_size = strlen(ES_NAME_PATTERN);
509 memset(buffer, 0, 88);
510 startpos = url_ftell(pb);
511 put_le16(pb, 0); /* length */
512 put_le16(pb, sc->media_info);
513 put_le16(pb, 0); /* reserved */
514 put_le16(pb, 0); /* reserved */
515 put_le32(pb, ctx->nb_frames);
516 put_le32(pb, 0); /* attributes rw, ro */
517 put_le32(pb, 0); /* mark in */
518 put_le32(pb, ctx->nb_frames); /* mark out */
519 strncpy(buffer, ES_NAME_PATTERN, path_size);
520 put_buffer(pb, (uint8_t *)buffer, path_size);
521 put_be16(pb, sc->media_info);
522 put_buffer(pb, (uint8_t *)buffer + path_size + 2, 88 - path_size - 2);
523 put_le32(pb, sc->track_type);
524 put_le32(pb, sc->sample_rate);
525 put_le32(pb, sc->sample_size);
526 put_le32(pb, 0); /* reserved */
527 switch (sc->codec->codec_id) {
528 case CODEC_ID_MPEG2VIDEO:
529 gxf_write_umf_media_mpeg(pb, sc);
531 case CODEC_ID_PCM_S16LE:
532 gxf_write_umf_media_audio(pb, sc);
534 case CODEC_ID_DVVIDEO:
535 gxf_write_umf_media_dv(pb, sc);
538 gxf_write_umf_media_timecode(pb, sc); /* 8 0bytes */
540 curpos = url_ftell(pb);
541 url_fseek(pb, startpos, SEEK_SET);
542 put_le16(pb, curpos - startpos);
543 url_fseek(pb, curpos, SEEK_SET);
545 return url_ftell(pb) - pos;
548 static int gxf_write_umf_user_data(ByteIOContext *pb, GXFContext *ctx)
550 int64_t pos = url_ftell(pb);
551 ctx->umf_user_data_offset = pos - ctx->umf_start_offset;
564 static int gxf_write_umf_packet(ByteIOContext *pb, GXFContext *ctx)
566 int64_t pos = url_ftell(pb);
568 gxf_write_packet_header(pb, PKT_UMF);
571 put_byte(pb, 3); /* first and last (only) packet */
572 put_be32(pb, ctx->umf_length); /* data length */
574 ctx->umf_start_offset = url_ftell(pb);
575 gxf_write_umf_payload(pb, ctx);
576 gxf_write_umf_material_description(pb, ctx);
577 ctx->umf_track_size = gxf_write_umf_track_description(pb, ctx);
578 ctx->umf_media_size = gxf_write_umf_media_description(pb, ctx);
579 ctx->umf_user_data_size = gxf_write_umf_user_data(pb, ctx);
580 ctx->umf_length = url_ftell(pb) - ctx->umf_start_offset;
581 return updatePacketSize(pb, pos);
584 #define GXF_NODELAY -5000
586 static int gxf_write_header(AVFormatContext *s)
588 ByteIOContext *pb = s->pb;
589 GXFContext *gxf = s->priv_data;
593 gxf->flags |= 0x00080000; /* material is simple clip */
594 for (i = 0; i < s->nb_streams; ++i) {
595 AVStream *st = s->streams[i];
596 GXFStreamContext *sc = &gxf->streams[i];
598 sc->codec = st->codec;
600 sc->media_type = codec_get_tag(gxf_media_types, sc->codec->codec_id);
601 if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
602 if (st->codec->codec_id != CODEC_ID_PCM_S16LE) {
603 av_log(s, AV_LOG_ERROR, "only 16 BIT PCM LE allowed for now\n");
606 if (st->codec->sample_rate != 48000) {
607 av_log(s, AV_LOG_ERROR, "only 48000hz sampling rate is allowed\n");
610 if (st->codec->channels != 1) {
611 av_log(s, AV_LOG_ERROR, "only mono tracks are allowed\n");
615 sc->sample_rate = st->codec->sample_rate;
616 av_set_pts_info(st, 64, 1, sc->sample_rate);
617 sc->sample_size = 16;
618 sc->frame_rate_index = -2;
619 sc->lines_index = -2;
622 gxf->flags |= 0x04000000; /* audio is 16 bit pcm */
623 av_fifo_init(&sc->audio_buffer, 3*GXF_AUDIO_PACKET_SIZE);
624 } else if (sc->codec->codec_type == CODEC_TYPE_VIDEO) {
625 /* FIXME check from time_base ? */
626 if (sc->codec->height == 480 || sc->codec->height == 512) { /* NTSC or NTSC+VBI */
627 sc->frame_rate_index = 5;
628 sc->sample_rate = 60;
629 gxf->flags |= 0x00000080;
630 } else { /* assume PAL */
631 sc->frame_rate_index = 6;
633 sc->sample_rate = 50;
634 gxf->flags |= 0x00000040;
636 gxf->sample_rate = sc->sample_rate;
637 av_set_pts_info(st, 64, 1, st->codec->time_base.den);
638 sc->dts_delay = GXF_NODELAY;
639 if (gxf_find_lines_index(sc) < 0)
640 sc->lines_index = -1;
641 sc->sample_size = st->codec->bit_rate;
642 sc->fields = 2; /* interlaced */
643 switch (sc->codec->codec_id) {
644 case CODEC_ID_MPEG2VIDEO:
645 sc->first_gop_closed = -1;
648 gxf->flags |= 0x00008000;
650 case CODEC_ID_DVVIDEO:
651 if (sc->codec->pix_fmt == PIX_FMT_YUV422P) {
654 gxf->flags |= 0x00002000;
657 gxf->flags |= 0x00001000;
661 av_log(s, AV_LOG_ERROR, "video codec not supported\n");
666 gxf_write_map_packet(pb, gxf);
667 //gxf_write_flt_packet(pb, gxf);
668 gxf_write_umf_packet(pb, gxf);
669 put_flush_packet(pb);
673 static int gxf_write_eos_packet(ByteIOContext *pb, GXFContext *ctx)
675 int64_t pos = url_ftell(pb);
677 gxf_write_packet_header(pb, PKT_EOS);
678 return updatePacketSize(pb, pos);
681 static int gxf_write_trailer(AVFormatContext *s)
683 ByteIOContext *pb = s->pb;
684 GXFContext *gxf = s->priv_data;
688 for (i = 0; i < s->nb_streams; ++i) {
689 if (s->streams[i]->codec->codec_type == CODEC_TYPE_AUDIO) {
690 av_fifo_free(&gxf->streams[i].audio_buffer);
691 } else if (s->streams[i]->codec->codec_type == CODEC_TYPE_VIDEO) {
692 gxf->nb_frames = 2 * s->streams[i]->codec->frame_number;
696 gxf_write_eos_packet(pb, gxf);
698 url_fseek(pb, 0, SEEK_SET);
699 /* overwrite map and umf packets with new values */
700 gxf_write_map_packet(pb, gxf);
701 //gxf_write_flt_packet(pb, gxf);
702 gxf_write_umf_packet(pb, gxf);
703 url_fseek(pb, end, SEEK_SET);
707 static int gxf_parse_mpeg_frame(GXFStreamContext *sc, const uint8_t *buf, int size)
711 for(i=0; i<size-4 && c!=0x100; i++){
713 if(c == 0x1B8 && sc->first_gop_closed == -1) /* GOP start code */
714 sc->first_gop_closed= (buf[i+4]>>6)&1;
716 return (buf[i+1]>>3)&7;
719 static int gxf_write_media_preamble(ByteIOContext *pb, GXFContext *ctx, AVPacket *pkt, int size)
721 GXFStreamContext *sc = &ctx->streams[pkt->stream_index];
722 int64_t dts = av_rescale_rnd(pkt->dts, ctx->sample_rate, sc->codec->time_base.den, AV_ROUND_UP);
724 put_byte(pb, sc->media_type);
725 put_byte(pb, sc->index);
727 if (sc->codec->codec_type == CODEC_TYPE_AUDIO) {
729 put_be16(pb, size / 2);
730 } else if (sc->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
731 int frame_type = gxf_parse_mpeg_frame(sc, pkt->data, pkt->size);
732 if (frame_type == FF_I_TYPE) {
735 } else if (frame_type == FF_B_TYPE) {
743 } else if (sc->codec->codec_id == CODEC_ID_DVVIDEO) {
744 put_byte(pb, size / 4096);
749 put_byte(pb, 1); /* flags */
750 put_byte(pb, 0); /* reserved */
754 static int gxf_write_media_packet(ByteIOContext *pb, GXFContext *ctx, AVPacket *pkt)
756 GXFStreamContext *sc = &ctx->streams[pkt->stream_index];
757 int64_t pos = url_ftell(pb);
760 gxf_write_packet_header(pb, PKT_MEDIA);
761 if (sc->codec->codec_id == CODEC_ID_MPEG2VIDEO && pkt->size % 4) /* MPEG-2 frames must be padded */
762 padding = 4 - pkt->size % 4;
763 else if (sc->codec->codec_type == CODEC_TYPE_AUDIO)
764 padding = GXF_AUDIO_PACKET_SIZE - pkt->size;
765 gxf_write_media_preamble(pb, ctx, pkt, pkt->size + padding);
766 put_buffer(pb, pkt->data, pkt->size);
767 gxf_write_padding(pb, padding);
768 return updatePacketSize(pb, pos);
771 static int gxf_write_packet(AVFormatContext *s, AVPacket *pkt)
773 GXFContext *gxf = s->priv_data;
775 gxf_write_media_packet(s->pb, gxf, pkt);
776 put_flush_packet(s->pb);
780 static int gxf_new_audio_packet(GXFContext *gxf, GXFStreamContext *sc, AVPacket *pkt, int flush)
782 int size = flush ? av_fifo_size(&sc->audio_buffer) : GXF_AUDIO_PACKET_SIZE;
786 av_new_packet(pkt, size);
787 av_fifo_read(&sc->audio_buffer, pkt->data, size);
788 pkt->stream_index = sc->index;
789 pkt->dts = sc->current_dts;
790 sc->current_dts += size / 2; /* we only support 16 bit pcm mono for now */
794 static int gxf_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
796 GXFContext *gxf = s->priv_data;
800 for (i = 0; i < s->nb_streams; i++) {
801 AVStream *st = s->streams[i];
802 GXFStreamContext *sc = &gxf->streams[i];
803 if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
804 if (pkt && pkt->stream_index == i) {
805 av_fifo_generic_write(&sc->audio_buffer, pkt->data, pkt->size, NULL);
808 if (flush || av_fifo_size(&sc->audio_buffer) >= GXF_AUDIO_PACKET_SIZE) {
809 if (!pkt && gxf_new_audio_packet(gxf, sc, &new_pkt, flush) > 0) {
811 break; /* add pkt right now into list */
814 } else if (pkt && pkt->stream_index == i) {
815 if (sc->dts_delay == GXF_NODELAY) /* adjust dts if needed */
816 sc->dts_delay = pkt->dts;
817 pkt->dts -= sc->dts_delay;
820 return av_interleave_packet_per_dts(s, out, pkt, flush);
823 AVOutputFormat gxf_muxer = {
825 NULL_IF_CONFIG_SMALL("GXF format"),
836 gxf_interleave_packet,