829 lines
25 KiB
C
829 lines
25 KiB
C
/*
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* GXF muxer.
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* Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>.
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avformat.h"
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#include "gxf.h"
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#include "riff.h"
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#include "fifo.h"
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#define GXF_AUDIO_PACKET_SIZE 65536
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typedef struct GXFStreamContext {
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AVCodecContext *codec;
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AVFifoBuffer audio_buffer;
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uint32_t track_type;
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uint32_t sample_size;
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uint32_t sample_rate;
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uint16_t media_type;
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uint16_t media_info;
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uint8_t index;
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int frame_rate_index;
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int lines_index;
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int fields;
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int iframes;
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int pframes;
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int bframes;
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int p_per_gop;
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int b_per_gop;
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int first_gop_closed;
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int64_t current_dts;
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int dts_delay;
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} GXFStreamContext;
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typedef struct GXFContext {
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uint32_t nb_frames;
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uint32_t material_flags;
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uint16_t audio_tracks;
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uint16_t mpeg_tracks;
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int64_t creation_time;
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uint32_t umf_start_offset;
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uint32_t umf_track_offset;
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uint32_t umf_media_offset;
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uint32_t umf_user_data_offset;
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uint32_t umf_user_data_size;
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uint32_t umf_length;
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uint16_t umf_track_size;
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uint16_t umf_media_size;
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int audio_written;
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int sample_rate;
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int flags;
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AVFormatContext *fc;
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GXFStreamContext streams[48];
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} GXFContext;
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typedef struct GXF_Lines {
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int height;
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int index;
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} GXF_Lines;
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/* FIXME check if it is relevant */
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static const GXF_Lines gxf_lines_tab[] = {
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{ 480, 1 }, /* NTSC */
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{ 512, 1 }, /* NTSC + VBI */
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{ 576, 2 }, /* PAL */
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{ 608, 2 }, /* PAL + VBI */
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{ 1080, 4 },
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{ 720, 6 },
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};
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static const AVCodecTag gxf_media_types[] = {
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{ CODEC_ID_MJPEG , 3 }, /* NTSC */
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{ CODEC_ID_MJPEG , 4 }, /* PAL */
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{ CODEC_ID_PCM_S24LE , 9 },
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{ CODEC_ID_PCM_S16LE , 10 },
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{ CODEC_ID_MPEG2VIDEO, 11 }, /* NTSC */
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{ CODEC_ID_MPEG2VIDEO, 12 }, /* PAL */
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{ CODEC_ID_DVVIDEO , 13 }, /* NTSC */
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{ CODEC_ID_DVVIDEO , 14 }, /* PAL */
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{ CODEC_ID_DVVIDEO , 15 }, /* 50M NTSC */
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{ CODEC_ID_DVVIDEO , 16 }, /* 50M PAL */
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{ CODEC_ID_AC3 , 17 },
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//{ CODEC_ID_NONE, , 18 }, /* Non compressed 24 bit audio */
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{ CODEC_ID_MPEG2VIDEO, 20 }, /* MPEG HD */
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{ CODEC_ID_MPEG1VIDEO, 22 }, /* NTSC */
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{ CODEC_ID_MPEG1VIDEO, 23 }, /* PAL */
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{ 0, 0 },
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};
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#define SERVER_PATH "/space/"
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#define ES_NAME_PATTERN "ES."
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static int gxf_find_lines_index(GXFStreamContext *ctx)
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{
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int i;
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for (i = 0; i < 6; ++i) {
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if (ctx->codec->height == gxf_lines_tab[i].height) {
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ctx->lines_index = gxf_lines_tab[i].index;
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return 0;
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}
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}
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return -1;
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}
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static void gxf_write_padding(ByteIOContext *pb, offset_t to_pad)
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{
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for (; to_pad > 0; to_pad--) {
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put_byte(pb, 0);
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}
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}
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static offset_t updatePacketSize(ByteIOContext *pb, offset_t pos)
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{
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offset_t curpos;
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int size;
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size = url_ftell(pb) - pos;
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if (size % 4) {
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gxf_write_padding(pb, 4 - size % 4);
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size = url_ftell(pb) - pos;
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}
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curpos = url_ftell(pb);
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url_fseek(pb, pos + 6, SEEK_SET);
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put_be32(pb, size);
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url_fseek(pb, curpos, SEEK_SET);
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return curpos - pos;
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}
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static offset_t updateSize(ByteIOContext *pb, offset_t pos)
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{
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offset_t curpos;
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curpos = url_ftell(pb);
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url_fseek(pb, pos, SEEK_SET);
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put_be16(pb, curpos - pos - 2);
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url_fseek(pb, curpos, SEEK_SET);
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return curpos - pos;
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}
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static void gxf_write_packet_header(ByteIOContext *pb, pkt_type_t type)
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{
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put_be32(pb, 0); /* packet leader for synchro */
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put_byte(pb, 1);
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put_byte(pb, type); /* map packet */
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put_be32(pb, 0); /* size */
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put_be32(pb, 0); /* reserved */
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put_byte(pb, 0xE1); /* trailer 1 */
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put_byte(pb, 0xE2); /* trailer 2 */
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}
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static int gxf_write_mpeg_auxiliary(ByteIOContext *pb, GXFStreamContext *ctx)
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{
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char buffer[1024];
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int size;
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if (ctx->iframes) {
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ctx->p_per_gop = ctx->pframes / ctx->iframes;
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if (ctx->pframes % ctx->iframes)
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ctx->p_per_gop++;
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if (ctx->pframes)
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ctx->b_per_gop = ctx->bframes / ctx->pframes;
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if (ctx->p_per_gop > 9)
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ctx->p_per_gop = 9; /* ensure value won't take more than one char */
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if (ctx->b_per_gop > 9)
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ctx->b_per_gop = 9; /* ensure value won't take more than one char */
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}
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size = snprintf(buffer, 1024, "Ver 1\nBr %.6f\nIpg 1\nPpi %d\nBpiop %d\n"
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"Pix 0\nCf %d\nCg %d\nSl 7\nnl16 %d\nVi 1\nf1 1\n",
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(float)ctx->codec->bit_rate, ctx->p_per_gop, ctx->b_per_gop,
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ctx->codec->pix_fmt == PIX_FMT_YUV422P ? 2 : 1, ctx->first_gop_closed == 1,
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ctx->codec->height / 16);
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put_byte(pb, TRACK_MPG_AUX);
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put_byte(pb, size + 1);
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put_buffer(pb, (uint8_t *)buffer, size + 1);
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return size + 3;
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}
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static int gxf_write_timecode_auxiliary(ByteIOContext *pb, GXFStreamContext *ctx)
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{
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/* FIXME implement that */
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put_byte(pb, 0); /* fields */
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put_byte(pb, 0); /* seconds */
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put_byte(pb, 0); /* minutes */
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put_byte(pb, 0); /* flags + hours */
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/* reserved */
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put_be32(pb, 0);
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return 8;
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}
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static int gxf_write_track_description(ByteIOContext *pb, GXFStreamContext *stream)
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{
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offset_t pos;
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/* track description section */
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put_byte(pb, stream->media_type + 0x80);
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put_byte(pb, stream->index + 0xC0);
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pos = url_ftell(pb);
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put_be16(pb, 0); /* size */
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/* media file name */
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put_byte(pb, TRACK_NAME);
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put_byte(pb, strlen(ES_NAME_PATTERN) + 3);
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put_tag(pb, ES_NAME_PATTERN);
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put_be16(pb, stream->media_info);
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put_byte(pb, 0);
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if (stream->codec->codec_id != CODEC_ID_MPEG2VIDEO) {
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/* auxiliary information */
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put_byte(pb, TRACK_AUX);
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put_byte(pb, 8);
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if (stream->codec->codec_id == CODEC_ID_NONE)
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gxf_write_timecode_auxiliary(pb, stream);
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else
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put_le64(pb, 0);
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}
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/* file system version */
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put_byte(pb, TRACK_VER);
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put_byte(pb, 4);
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put_be32(pb, 0);
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if (stream->codec->codec_id == CODEC_ID_MPEG2VIDEO)
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gxf_write_mpeg_auxiliary(pb, stream);
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/* frame rate */
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put_byte(pb, TRACK_FPS);
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put_byte(pb, 4);
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put_be32(pb, stream->frame_rate_index);
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/* lines per frame */
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put_byte(pb, TRACK_LINES);
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put_byte(pb, 4);
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put_be32(pb, stream->lines_index);
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/* fields per frame */
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put_byte(pb, TRACK_FPF);
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put_byte(pb, 4);
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put_be32(pb, stream->fields);
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return updateSize(pb, pos);
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}
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static int gxf_write_material_data_section(ByteIOContext *pb, GXFContext *ctx)
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{
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offset_t pos;
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const char *filename = strrchr(ctx->fc->filename, '/');
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pos = url_ftell(pb);
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put_be16(pb, 0); /* size */
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/* name */
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if (filename)
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filename++;
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else
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filename = ctx->fc->filename;
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put_byte(pb, MAT_NAME);
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put_byte(pb, strlen(SERVER_PATH) + strlen(filename) + 1);
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put_tag(pb, SERVER_PATH);
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put_tag(pb, filename);
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put_byte(pb, 0);
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/* first field */
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put_byte(pb, MAT_FIRST_FIELD);
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put_byte(pb, 4);
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put_be32(pb, 0);
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/* last field */
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put_byte(pb, MAT_LAST_FIELD);
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put_byte(pb, 4);
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put_be32(pb, ctx->nb_frames);
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/* reserved */
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put_byte(pb, MAT_MARK_IN);
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put_byte(pb, 4);
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put_be32(pb, 0);
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put_byte(pb, MAT_MARK_OUT);
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put_byte(pb, 4);
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put_be32(pb, ctx->nb_frames);
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/* estimated size */
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put_byte(pb, MAT_SIZE);
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put_byte(pb, 4);
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put_be32(pb, url_fsize(pb) / 1024);
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return updateSize(pb, pos);
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}
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static int gxf_write_track_description_section(ByteIOContext *pb, GXFContext *ctx)
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{
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offset_t pos;
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int i;
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pos = url_ftell(pb);
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put_be16(pb, 0); /* size */
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for (i = 0; i < ctx->fc->nb_streams; ++i)
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gxf_write_track_description(pb, &ctx->streams[i]);
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return updateSize(pb, pos);
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}
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static int gxf_write_map_packet(ByteIOContext *pb, GXFContext *ctx)
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{
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offset_t pos = url_ftell(pb);
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gxf_write_packet_header(pb, PKT_MAP);
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/* preamble */
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put_byte(pb, 0xE0); /* version */
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put_byte(pb, 0xFF); /* reserved */
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gxf_write_material_data_section(pb, ctx);
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gxf_write_track_description_section(pb, ctx);
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return updatePacketSize(pb, pos);
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}
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#if 0
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static int gxf_write_flt_packet(ByteIOContext *pb, GXFContext *ctx)
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{
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offset_t pos = url_ftell(pb);
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int i;
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gxf_write_packet_header(pb, PKT_FLT);
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put_le32(pb, 1000); /* number of fields */
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put_le32(pb, 0); /* number of active flt entries */
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for (i = 0; i < 1000; ++i) {
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put_le32(pb, 0);
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}
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return updatePacketSize(pb, pos);
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}
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#endif
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static int gxf_write_umf_material_description(ByteIOContext *pb, GXFContext *ctx)
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{
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put_le32(pb, ctx->flags);
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put_le32(pb, ctx->nb_frames); /* length of the longest track */
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put_le32(pb, ctx->nb_frames); /* length of the shortest track */
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put_le32(pb, 0); /* mark in */
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put_le32(pb, ctx->nb_frames); /* mark out */
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put_le32(pb, 0); /* timecode mark in */
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put_le32(pb, ctx->nb_frames); /* timecode mark out */
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put_le64(pb, ctx->fc->timestamp); /* modification time */
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put_le64(pb, ctx->fc->timestamp); /* creation time */
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put_le16(pb, 0); /* reserved */
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put_le16(pb, 0); /* reserved */
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put_le16(pb, ctx->audio_tracks);
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put_le16(pb, 0); /* timecode track count */
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put_le16(pb, 0); /* reserved */
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put_le16(pb, ctx->mpeg_tracks);
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return 48;
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}
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static int gxf_write_umf_payload(ByteIOContext *pb, GXFContext *ctx)
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{
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put_le32(pb, ctx->umf_length); /* total length of the umf data */
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put_le32(pb, 3); /* version */
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put_le32(pb, ctx->fc->nb_streams);
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put_le32(pb, ctx->umf_track_offset); /* umf track section offset */
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put_le32(pb, ctx->umf_track_size);
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put_le32(pb, ctx->fc->nb_streams);
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put_le32(pb, ctx->umf_media_offset);
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put_le32(pb, ctx->umf_media_size);
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put_le32(pb, ctx->umf_user_data_offset); /* user data offset */
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put_le32(pb, ctx->umf_user_data_size); /* user data size */
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put_le32(pb, 0); /* reserved */
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put_le32(pb, 0); /* reserved */
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return 48;
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}
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static int gxf_write_umf_track_description(ByteIOContext *pb, GXFContext *ctx)
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{
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offset_t pos = url_ftell(pb);
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int tracks[255]={0};
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int i;
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ctx->umf_track_offset = pos - ctx->umf_start_offset;
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for (i = 0; i < ctx->fc->nb_streams; ++i) {
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AVStream *st = ctx->fc->streams[i];
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GXFStreamContext *sc = &ctx->streams[i];
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int id = 0;
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switch (st->codec->codec_id) {
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case CODEC_ID_MPEG1VIDEO: id= 'L'; break;
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case CODEC_ID_MPEG2VIDEO: id= 'M'; break;
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case CODEC_ID_PCM_S16LE: id= 'A'; break;
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case CODEC_ID_DVVIDEO: id= sc->track_type == 6 ? 'E' : 'D'; break;
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case CODEC_ID_MJPEG: id= 'V'; break;
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default: break;
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}
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sc->media_info= id << 8;
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/* FIXME first 10 audio tracks are 0 to 9 next 22 are A to V */
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sc->media_info |= '0' + (tracks[id]++);
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put_le16(pb, sc->media_info);
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put_le16(pb, 1);
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}
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return url_ftell(pb) - pos;
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}
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static int gxf_write_umf_media_mpeg(ByteIOContext *pb, GXFStreamContext *stream)
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{
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if (stream->codec->pix_fmt == PIX_FMT_YUV422P)
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put_le32(pb, 2);
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else
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put_le32(pb, 1); /* default to 420 */
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put_le32(pb, stream->first_gop_closed == 1); /* closed = 1, open = 0, unknown = 255 */
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put_le32(pb, 3); /* top = 1, bottom = 2, frame = 3, unknown = 0 */
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put_le32(pb, 1); /* I picture per GOP */
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put_le32(pb, stream->p_per_gop);
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put_le32(pb, stream->b_per_gop);
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if (stream->codec->codec_id == CODEC_ID_MPEG2VIDEO)
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put_le32(pb, 2);
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else if (stream->codec->codec_id == CODEC_ID_MPEG1VIDEO)
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put_le32(pb, 1);
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else
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put_le32(pb, 0);
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put_le32(pb, 0); /* reserved */
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return 32;
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}
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static int gxf_write_umf_media_timecode(ByteIOContext *pb, GXFStreamContext *track)
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{
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/* FIXME implement */
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put_be32(pb, 0); /* drop frame flag */
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put_be32(pb, 0); /* reserved */
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put_be32(pb, 0); /* reserved */
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put_be32(pb, 0); /* reserved */
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put_be32(pb, 0); /* reserved */
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put_be32(pb, 0); /* reserved */
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put_be32(pb, 0); /* reserved */
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put_be32(pb, 0); /* reserved */
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return 32;
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}
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static int gxf_write_umf_media_dv(ByteIOContext *pb, GXFStreamContext *track)
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{
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int i;
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for (i = 0; i < 8; i++) {
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put_be32(pb, 0);
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}
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return 32;
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}
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static int gxf_write_umf_media_audio(ByteIOContext *pb, GXFStreamContext *track)
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{
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put_le64(pb, av_dbl2int(1)); /* sound level to begin to */
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put_le64(pb, av_dbl2int(1)); /* sound level to begin to */
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put_le32(pb, 0); /* number of fields over which to ramp up sound level */
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put_le32(pb, 0); /* number of fields over which to ramp down sound level */
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put_le32(pb, 0); /* reserved */
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put_le32(pb, 0); /* reserved */
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return 32;
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}
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#if 0
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static int gxf_write_umf_media_mjpeg(ByteIOContext *pb, GXFStreamContext *track)
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|
{
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put_be64(pb, 0); /* FIXME FLOAT max chroma quant level */
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put_be64(pb, 0); /* FIXME FLOAT max luma quant level */
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put_be64(pb, 0); /* FIXME FLOAT min chroma quant level */
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put_be64(pb, 0); /* FIXME FLOAT min luma quant level */
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return 32;
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}
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#endif
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static int gxf_write_umf_media_description(ByteIOContext *pb, GXFContext *ctx)
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{
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offset_t pos;
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int i;
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pos = url_ftell(pb);
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ctx->umf_media_offset = pos - ctx->umf_start_offset;
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for (i = 0; i < ctx->fc->nb_streams; ++i) {
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GXFStreamContext *sc = &ctx->streams[i];
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char buffer[88];
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offset_t startpos, curpos;
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int path_size = strlen(ES_NAME_PATTERN);
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memset(buffer, 0, 88);
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startpos = url_ftell(pb);
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put_le16(pb, 0); /* length */
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put_le16(pb, sc->media_info);
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put_le16(pb, 0); /* reserved */
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put_le16(pb, 0); /* reserved */
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put_le32(pb, ctx->nb_frames);
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put_le32(pb, 0); /* attributes rw, ro */
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put_le32(pb, 0); /* mark in */
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put_le32(pb, ctx->nb_frames); /* mark out */
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strncpy(buffer, ES_NAME_PATTERN, path_size);
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put_buffer(pb, (uint8_t *)buffer, path_size);
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put_be16(pb, sc->media_info);
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put_buffer(pb, (uint8_t *)buffer + path_size + 2, 88 - path_size - 2);
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put_le32(pb, sc->track_type);
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put_le32(pb, sc->sample_rate);
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put_le32(pb, sc->sample_size);
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put_le32(pb, 0); /* reserved */
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switch (sc->codec->codec_id) {
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case CODEC_ID_MPEG2VIDEO:
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gxf_write_umf_media_mpeg(pb, sc);
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break;
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case CODEC_ID_PCM_S16LE:
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gxf_write_umf_media_audio(pb, sc);
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break;
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case CODEC_ID_DVVIDEO:
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gxf_write_umf_media_dv(pb, sc);
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break;
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default:
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gxf_write_umf_media_timecode(pb, sc); /* 8 0bytes */
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}
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curpos = url_ftell(pb);
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url_fseek(pb, startpos, SEEK_SET);
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put_le16(pb, curpos - startpos);
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url_fseek(pb, curpos, SEEK_SET);
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}
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return url_ftell(pb) - pos;
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}
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static int gxf_write_umf_user_data(ByteIOContext *pb, GXFContext *ctx)
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{
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offset_t pos = url_ftell(pb);
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ctx->umf_user_data_offset = pos - ctx->umf_start_offset;
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put_le32(pb, 20);
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put_le32(pb, 0);
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put_le16(pb, 0);
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put_le16(pb, 0);
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put_le32(pb, 0);
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put_byte(pb, 0);
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put_byte(pb, 0);
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put_byte(pb, 0);
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put_byte(pb, 0);
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return 20;
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}
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static int gxf_write_umf_packet(ByteIOContext *pb, GXFContext *ctx)
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{
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offset_t pos = url_ftell(pb);
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gxf_write_packet_header(pb, PKT_UMF);
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/* preamble */
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put_byte(pb, 3); /* first and last (only) packet */
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put_be32(pb, ctx->umf_length); /* data length */
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ctx->umf_start_offset = url_ftell(pb);
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gxf_write_umf_payload(pb, ctx);
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gxf_write_umf_material_description(pb, ctx);
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ctx->umf_track_size = gxf_write_umf_track_description(pb, ctx);
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ctx->umf_media_size = gxf_write_umf_media_description(pb, ctx);
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ctx->umf_user_data_size = gxf_write_umf_user_data(pb, ctx);
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ctx->umf_length = url_ftell(pb) - ctx->umf_start_offset;
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return updatePacketSize(pb, pos);
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}
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#define GXF_NODELAY -5000
|
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static int gxf_write_header(AVFormatContext *s)
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|
{
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|
ByteIOContext *pb = &s->pb;
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GXFContext *gxf = s->priv_data;
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int i;
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|
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gxf->fc = s;
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gxf->flags |= 0x00080000; /* material is simple clip */
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for (i = 0; i < s->nb_streams; ++i) {
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AVStream *st = s->streams[i];
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GXFStreamContext *sc = &gxf->streams[i];
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sc->codec = st->codec;
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sc->index = i;
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sc->media_type = codec_get_tag(gxf_media_types, sc->codec->codec_id);
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if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
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if (st->codec->codec_id != CODEC_ID_PCM_S16LE) {
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|
av_log(s, AV_LOG_ERROR, "only 16 BIT PCM LE allowed for now\n");
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|
return -1;
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|
}
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|
if (st->codec->sample_rate != 48000) {
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|
av_log(s, AV_LOG_ERROR, "only 48000hz sampling rate is allowed\n");
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|
return -1;
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}
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if (st->codec->channels != 1) {
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|
av_log(s, AV_LOG_ERROR, "only mono tracks are allowed\n");
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|
return -1;
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|
}
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|
sc->track_type = 2;
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|
sc->sample_rate = st->codec->sample_rate;
|
|
av_set_pts_info(st, 64, 1, sc->sample_rate);
|
|
sc->sample_size = 16;
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|
sc->frame_rate_index = -2;
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|
sc->lines_index = -2;
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|
sc->fields = -2;
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|
gxf->audio_tracks++;
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|
gxf->flags |= 0x04000000; /* audio is 16 bit pcm */
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av_fifo_init(&sc->audio_buffer, 3*GXF_AUDIO_PACKET_SIZE);
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} else if (sc->codec->codec_type == CODEC_TYPE_VIDEO) {
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|
/* FIXME check from time_base ? */
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|
if (sc->codec->height == 480 || sc->codec->height == 512) { /* NTSC or NTSC+VBI */
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sc->frame_rate_index = 5;
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|
sc->sample_rate = 60;
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|
gxf->flags |= 0x00000080;
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} else { /* assume PAL */
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|
sc->frame_rate_index = 6;
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|
sc->media_type++;
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|
sc->sample_rate = 50;
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|
gxf->flags |= 0x00000040;
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|
}
|
|
gxf->sample_rate = sc->sample_rate;
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|
av_set_pts_info(st, 64, 1, st->codec->time_base.den);
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|
sc->dts_delay = GXF_NODELAY;
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if (gxf_find_lines_index(sc) < 0)
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sc->lines_index = -1;
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sc->sample_size = st->codec->bit_rate;
|
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sc->fields = 2; /* interlaced */
|
|
switch (sc->codec->codec_id) {
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case CODEC_ID_MPEG2VIDEO:
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sc->first_gop_closed = -1;
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|
sc->track_type = 4;
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|
gxf->mpeg_tracks++;
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|
gxf->flags |= 0x00008000;
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break;
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case CODEC_ID_DVVIDEO:
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if (sc->codec->pix_fmt == PIX_FMT_YUV422P) {
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|
sc->media_type += 2;
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sc->track_type = 6;
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|
gxf->flags |= 0x00002000;
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} else {
|
|
sc->track_type = 5;
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|
gxf->flags |= 0x00001000;
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|
}
|
|
break;
|
|
default:
|
|
av_log(s, AV_LOG_ERROR, "video codec not supported\n");
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
gxf_write_map_packet(pb, gxf);
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|
//gxf_write_flt_packet(pb, gxf);
|
|
gxf_write_umf_packet(pb, gxf);
|
|
put_flush_packet(pb);
|
|
return 0;
|
|
}
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|
static int gxf_write_eos_packet(ByteIOContext *pb, GXFContext *ctx)
|
|
{
|
|
offset_t pos = url_ftell(pb);
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|
|
|
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) {
|
|
av_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_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->streams[pkt->stream_index];
|
|
int64_t dts = 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, dts);
|
|
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, dts);
|
|
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;
|
|
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);
|
|
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_new_audio_packet(GXFContext *gxf, GXFStreamContext *sc, AVPacket *pkt, int flush)
|
|
{
|
|
int size = flush ? av_fifo_size(&sc->audio_buffer) : GXF_AUDIO_PACKET_SIZE;
|
|
|
|
if (!size)
|
|
return 0;
|
|
av_new_packet(pkt, size);
|
|
av_fifo_read(&sc->audio_buffer, pkt->data, size);
|
|
pkt->stream_index = sc->index;
|
|
pkt->dts = sc->current_dts;
|
|
sc->current_dts += size / 2; /* we only support 16 bit pcm mono for now */
|
|
return size;
|
|
}
|
|
|
|
static int gxf_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
|
|
{
|
|
GXFContext *gxf = s->priv_data;
|
|
AVPacket new_pkt;
|
|
int i;
|
|
|
|
for (i = 0; i < s->nb_streams; i++) {
|
|
AVStream *st = s->streams[i];
|
|
GXFStreamContext *sc = &gxf->streams[i];
|
|
if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
|
|
if (pkt && pkt->stream_index == i) {
|
|
av_fifo_write(&sc->audio_buffer, pkt->data, pkt->size);
|
|
pkt = NULL;
|
|
}
|
|
if (flush || av_fifo_size(&sc->audio_buffer) >= GXF_AUDIO_PACKET_SIZE) {
|
|
if (!pkt && gxf_new_audio_packet(gxf, sc, &new_pkt, flush) > 0) {
|
|
pkt = &new_pkt;
|
|
break; /* add pkt right now into list */
|
|
}
|
|
}
|
|
} else if (pkt && pkt->stream_index == i) {
|
|
if (sc->dts_delay == GXF_NODELAY) /* adjust dts if needed */
|
|
sc->dts_delay = pkt->dts;
|
|
pkt->dts -= sc->dts_delay;
|
|
}
|
|
}
|
|
return av_interleave_packet_per_dts(s, out, pkt, flush);
|
|
}
|
|
|
|
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,
|
|
};
|