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GXF muxer

Originally committed as revision 5787 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier 2006-07-19 09:38:22 +00:00
parent 1d94a6620f
commit 86329cce04
6 changed files with 845 additions and 0 deletions

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@ -191,6 +191,7 @@ Muxers/Demuxers:
flic.c Mike Melanson flic.c Mike Melanson
flvdec.c, flvenc.c Michael Niedermayer flvdec.c, flvenc.c Michael Niedermayer
gxf.c Reimar Doeffinger gxf.c Reimar Doeffinger
gxfenc.c Baptiste Coudurier
idcin.c Mike Melanson idcin.c Mike Melanson
idroq.c Mike Melanson idroq.c Mike Melanson
ipmovie.c Mike Melanson ipmovie.c Mike Melanson

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@ -183,6 +183,10 @@ ifeq ($(CONFIG_LIBOGG),yes)
OBJS-$(CONFIG_OGG_MUXER) += ogg.o OBJS-$(CONFIG_OGG_MUXER) += ogg.o
endif endif
ifeq ($(CONFIG_GPL),yes)
OBJS-$(CONFIG_GXF_MUXER) += gxfenc.o
endif
OBJS += $(OBJS-yes) OBJS += $(OBJS-yes)
NAME=avformat NAME=avformat

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@ -138,6 +138,9 @@ void av_register_all(void)
#ifdef CONFIG_GXF_DEMUXER #ifdef CONFIG_GXF_DEMUXER
av_register_input_format(&gxf_demuxer); av_register_input_format(&gxf_demuxer);
#endif #endif
#if defined(CONFIG_GXF_MUXER) && defined(CONFIG_GPL)
av_register_output_format(&gxf_muxer);
#endif
#ifdef CONFIG_IDCIN_DEMUXER #ifdef CONFIG_IDCIN_DEMUXER
av_register_input_format(&idcin_demuxer); av_register_input_format(&idcin_demuxer);
#endif #endif

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@ -35,6 +35,7 @@ extern AVInputFormat gif_demuxer;
extern AVInputFormat video_grab_device_demuxer; extern AVInputFormat video_grab_device_demuxer;
extern AVInputFormat video_grab_device_demuxer; extern AVInputFormat video_grab_device_demuxer;
extern AVInputFormat gxf_demuxer; extern AVInputFormat gxf_demuxer;
extern AVOutputFormat gxf_muxer;
extern AVInputFormat idcin_demuxer; extern AVInputFormat idcin_demuxer;
extern AVInputFormat roq_demuxer; extern AVInputFormat roq_demuxer;
extern AVInputFormat image2_demuxer; extern AVInputFormat image2_demuxer;

13
libavformat/gxf.h Normal file
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@ -0,0 +1,13 @@
#ifndef FFMPEG_GXF_H
#define FFMPEG_GXF_H
/* gxf.c */
typedef enum {
PKT_MAP = 0xbc,
PKT_MEDIA = 0xbf,
PKT_EOS = 0xfb,
PKT_FLT = 0xfc,
PKT_UMF = 0xfd
} pkt_type_t;
#endif /* FFMPEG_GXF_H */

823
libavformat/gxfenc.c Normal file
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@ -0,0 +1,823 @@
/*
* GXF muxer.
* Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>.
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This library 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avformat.h"
#include "gxf.h"
#include "riff.h"
#define GXF_AUDIO_PACKET_SIZE 65536
typedef struct GXFStreamContext {
AVCodecContext *codec;
FifoBuffer audio_buffer;
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_gop;
} GXFStreamContext;
typedef struct GXFContext {
uint32_t nb_frames;
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 field_number;
int flags;
AVFormatContext *fc;
GXFStreamContext streams[48];
} 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 CodecTag 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, offset_t to_pad)
{
while (to_pad--) {
put_byte(pb, 0);
}
}
static offset_t updatePacketSize(ByteIOContext *pb, offset_t pos)
{
offset_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 offset_t updateSize(ByteIOContext *pb, offset_t pos)
{
offset_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, pkt_type_t 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;
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_gop = ctx->bframes / ctx->pframes;
if (ctx->p_per_gop > 9)
ctx->p_per_gop = 9; /* ensure value won't take more than one char */
if (ctx->b_per_gop > 9)
ctx->b_per_gop = 9; /* ensure value won't take more than one char */
}
size = snprintf(buffer, 1024, "Ver 1\nBr %.6f\nIpg 1\nPpi %d\nBpiop %d\n"
"Pix 0\nCf %d\nCg 1\nSl 7\nnl16 %d\nVi 1\nf1 1\n",
(float)ctx->codec->bit_rate, ctx->p_per_gop, ctx->b_per_gop,
ctx->codec->pix_fmt == PIX_FMT_YUV422P ? 2 : 1,
ctx->codec->height / 16);
put_byte(pb, 0x4F);
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)
{
offset_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, 0x4C);
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, 0x4D);
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, 0x4E);
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, 0x50);
put_byte(pb, 4);
put_be32(pb, stream->frame_rate_index);
/* lines per frame */
put_byte(pb, 0x51);
put_byte(pb, 4);
put_be32(pb, stream->lines_index);
/* fields per frame */
put_byte(pb, 0x52);
put_byte(pb, 4);
put_be32(pb, stream->fields);
return updateSize(pb, pos);
}
static int gxf_write_material_data_section(ByteIOContext *pb, GXFContext *ctx)
{
offset_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, 0x40);
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, 0x41);
put_byte(pb, 4);
put_be32(pb, 0);
/* last field */
put_byte(pb, 0x42);
put_byte(pb, 4);
put_be32(pb, ctx->nb_frames);
/* reserved */
put_byte(pb, 0x43);
put_byte(pb, 4);
put_be32(pb, 0);
put_byte(pb, 0x44);
put_byte(pb, 4);
put_be32(pb, ctx->nb_frames);
/* estimated size */
put_byte(pb, 0x45);
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)
{
offset_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->streams[i]);
return updateSize(pb, pos);
}
static int gxf_write_map_packet(ByteIOContext *pb, GXFContext *ctx)
{
offset_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)
{
offset_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)
{
put_le32(pb, ctx->flags);
put_le32(pb, ctx->nb_frames); /* length of the longest track */
put_le32(pb, ctx->nb_frames); /* length of the shortest track */
put_le32(pb, 0); /* mark in */
put_le32(pb, ctx->nb_frames); /* mark out */
put_le32(pb, 0); /* timecode mark in */
put_le32(pb, ctx->nb_frames); /* 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)
{
offset_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 = &ctx->streams[i];
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;
}
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, 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_gop);
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)
{
offset_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->streams[i];
char buffer[88];
offset_t startpos, curpos;
int path_size = strlen(ES_NAME_PATTERN);
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_frames);
put_le32(pb, 0); /* attributes rw, ro */
put_le32(pb, 0); /* mark in */
put_le32(pb, ctx->nb_frames); /* 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)
{
offset_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)
{
offset_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);
}
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 = &gxf->streams[i];
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;
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 */
fifo_init(&sc->audio_buffer, 3*GXF_AUDIO_PACKET_SIZE);
} 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;
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->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(NULL, AV_LOG_ERROR, "video codec not supported\n");
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)
{
offset_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;
offset_t end;
int i;
for (i = 0; i < s->nb_streams; ++i) {
if (s->streams[i]->codec->codec_type == CODEC_TYPE_AUDIO) {
fifo_free(&gxf->streams[i].audio_buffer);
}
if (s->streams[i]->codec->frame_number > gxf->nb_frames)
gxf->nb_frames = 2 * s->streams[i]->codec->frame_number;
}
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_write_media_preamble(ByteIOContext *pb, GXFContext *ctx, AVPacket *pkt, int size)
{
GXFStreamContext *sc = &ctx->streams[pkt->stream_index];
put_byte(pb, sc->media_type);
put_byte(pb, sc->index);
put_be32(pb, ctx->field_number);
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) {
if (pkt->flags & PKT_FLAG_KEY) {
put_byte(pb, 0x0d);
sc->iframes++;
} else if (pkt->pts != pkt->dts) {
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, ctx->field_number);
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->streams[pkt->stream_index];
offset_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;
gxf_write_media_preamble(pb, ctx, pkt, pkt->size + padding);
if (sc->codec->codec_type == CODEC_TYPE_AUDIO)
put_buffer(pb, pkt->data, GXF_AUDIO_PACKET_SIZE);
else {
ctx->field_number += 2;
put_buffer(pb, pkt->data, pkt->size);
}
gxf_write_padding(pb, padding);
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)
{
AVPacketList *pktl, **next_point, *this_pktl;
GXFContext *gxf = s->priv_data;
GXFStreamContext *sc;
int i;
if (pkt) {
sc = &gxf->streams[pkt->stream_index];
if (sc->codec->codec_type == CODEC_TYPE_AUDIO) {
fifo_write(&sc->audio_buffer, pkt->data, pkt->size, NULL);
} else {
this_pktl = av_mallocz(sizeof(AVPacketList));
this_pktl->pkt = *pkt;
if(pkt->destruct == av_destruct_packet)
pkt->destruct = NULL; // non shared -> must keep original from being freed
else
av_dup_packet(&this_pktl->pkt); //shared -> must dup
next_point = &s->packet_buffer;
while(*next_point){
AVStream *st= s->streams[ pkt->stream_index];
AVStream *st2= s->streams[ (*next_point)->pkt.stream_index];
int64_t left= st2->time_base.num * (int64_t)st ->time_base.den;
int64_t right= st ->time_base.num * (int64_t)st2->time_base.den;
if((*next_point)->pkt.dts * left > pkt->dts * right) //FIXME this can overflow
break;
next_point= &(*next_point)->next;
}
this_pktl->next = *next_point;
*next_point = this_pktl;
}
}
if (gxf->audio_written == gxf->audio_tracks) {
if (!s->packet_buffer) {
gxf->audio_written = 0;
return 0;
}
pktl = s->packet_buffer;
*out = pktl->pkt;
s->packet_buffer = pktl->next;
av_freep(&pktl);
return 1;
} else {
for (i = 0; i < s->nb_streams; i++) {
sc = &gxf->streams[i];
if (sc->codec->codec_type == CODEC_TYPE_AUDIO &&
(flush || fifo_size(&sc->audio_buffer, NULL) >= GXF_AUDIO_PACKET_SIZE)) {
int size = flush ? fifo_size(&sc->audio_buffer, NULL) : GXF_AUDIO_PACKET_SIZE;
av_new_packet(out, GXF_AUDIO_PACKET_SIZE);
fifo_read(&sc->audio_buffer, out->data, size, NULL);
gxf->audio_written++;
out->stream_index = i;
out->size = size;
return 1;
}
}
}
av_init_packet(out);
return 0;
}
AVOutputFormat gxf_muxer = {
"gxf",
"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,
};