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ffmpeg / libavformat / gxfenc.c @ 72415b2a

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/*
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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 "audiointerleave.h"
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#define GXF_AUDIO_PACKET_SIZE 65536
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typedef struct GXFStreamContext {
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    AudioInterleaveContext aic;
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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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    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_i_or_p; ///< number of B frames per I frame or P frame
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    int first_gop_closed;
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    unsigned order;   ///< interleaving order
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} GXFStreamContext;
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typedef struct GXFContext {
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    uint32_t nb_fields;
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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_length;
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    uint16_t umf_track_size;
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    uint16_t umf_media_size;
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    AVRational time_base;
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    int flags;
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    GXFStreamContext timecode_track;
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    unsigned *flt_entries;    ///< offsets of packets /1024, starts after 2nd video field
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    unsigned flt_entries_nb;
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    uint64_t *map_offsets;    ///< offset of map packets
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    unsigned map_offsets_nb;
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    unsigned packet_count;
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} GXFContext;
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static const struct {
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    int height, index;
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} 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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    { CODEC_ID_NONE,         0 },
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};
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#define SERVER_PATH "EXT:/PDR/default/"
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#define ES_NAME_PATTERN "EXT:/PDR/default/ES."
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102
static int gxf_find_lines_index(AVStream *st)
103
{
104
    GXFStreamContext *sc = st->priv_data;
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    int i;
106

    
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    for (i = 0; i < 6; ++i) {
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        if (st->codec->height == gxf_lines_tab[i].height) {
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            sc->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, int64_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 int64_t updatePacketSize(ByteIOContext *pb, int64_t pos)
124
{
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    int64_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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140
static int64_t updateSize(ByteIOContext *pb, int64_t pos)
141
{
142
    int64_t curpos;
143

    
144
    curpos = url_ftell(pb);
145
    url_fseek(pb, pos, SEEK_SET);
146
    put_be16(pb, curpos - pos - 2);
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    url_fseek(pb, curpos, SEEK_SET);
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    return curpos - pos;
149
}
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151
static void gxf_write_packet_header(ByteIOContext *pb, GXFPktType type)
152
{
153
    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 */
160
}
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162
static int gxf_write_mpeg_auxiliary(ByteIOContext *pb, AVStream *st)
163
{
164
    GXFStreamContext *sc = st->priv_data;
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    char buffer[1024];
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    int size, starting_line;
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168
    if (sc->iframes) {
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        sc->p_per_gop = sc->pframes / sc->iframes;
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        if (sc->pframes % sc->iframes)
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            sc->p_per_gop++;
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        if (sc->pframes) {
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            sc->b_per_i_or_p = sc->bframes / sc->pframes;
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            if (sc->bframes % sc->pframes)
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                sc->b_per_i_or_p++;
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        }
177
        if (sc->p_per_gop > 9)
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            sc->p_per_gop = 9; /* ensure value won't take more than one char */
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        if (sc->b_per_i_or_p > 9)
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            sc->b_per_i_or_p = 9; /* ensure value won't take more than one char */
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    }
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    if (st->codec->height == 512 || st->codec->height == 608)
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        starting_line = 7; // VBI
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    else if (st->codec->height == 480)
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        starting_line = 20;
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    else
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        starting_line = 23; // default PAL
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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 %d\nnl16 %d\nVi 1\nf1 1\n",
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                    (float)st->codec->bit_rate, sc->p_per_gop, sc->b_per_i_or_p,
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                    st->codec->pix_fmt == PIX_FMT_YUV422P ? 2 : 1, sc->first_gop_closed == 1,
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                    starting_line, st->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;
198
}
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static int gxf_write_timecode_auxiliary(ByteIOContext *pb, GXFStreamContext *sc)
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{
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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);
208
    return 8;
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}
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static int gxf_write_track_description(AVFormatContext *s, GXFStreamContext *sc, int index)
212
{
213
    ByteIOContext *pb = s->pb;
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    int64_t pos;
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    int mpeg = sc->track_type == 4 || sc->track_type == 9;
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    /* track description section */
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    put_byte(pb, sc->media_type + 0x80);
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    put_byte(pb, 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, sc->media_info);
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    put_byte(pb, 0);
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231
    if (!mpeg) {
232
        /* auxiliary information */
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        put_byte(pb, TRACK_AUX);
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        put_byte(pb, 8);
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        if (sc->track_type == 3)
236
            gxf_write_timecode_auxiliary(pb, sc);
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        else
238
            put_le64(pb, 0);
239
    }
240

    
241
    /* file system version */
242
    put_byte(pb, TRACK_VER);
243
    put_byte(pb, 4);
244
    put_be32(pb, 0);
245

    
246
    if (mpeg)
247
        gxf_write_mpeg_auxiliary(pb, s->streams[index]);
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249
    /* frame rate */
250
    put_byte(pb, TRACK_FPS);
251
    put_byte(pb, 4);
252
    put_be32(pb, sc->frame_rate_index);
253

    
254
    /* lines per frame */
255
    put_byte(pb, TRACK_LINES);
256
    put_byte(pb, 4);
257
    put_be32(pb, sc->lines_index);
258

    
259
    /* fields per frame */
260
    put_byte(pb, TRACK_FPF);
261
    put_byte(pb, 4);
262
    put_be32(pb, sc->fields);
263

    
264
    return updateSize(pb, pos);
265
}
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267
static int gxf_write_material_data_section(AVFormatContext *s)
268
{
269
    GXFContext *gxf = s->priv_data;
270
    ByteIOContext *pb = s->pb;
271
    int64_t pos;
272
    const char *filename = strrchr(s->filename, '/');
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274
    pos = url_ftell(pb);
275
    put_be16(pb, 0); /* size */
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277
    /* name */
278
    if (filename)
279
        filename++;
280
    else
281
        filename = s->filename;
282
    put_byte(pb, MAT_NAME);
283
    put_byte(pb, strlen(SERVER_PATH) + strlen(filename) + 1);
284
    put_tag(pb, SERVER_PATH);
285
    put_tag(pb, filename);
286
    put_byte(pb, 0);
287

    
288
    /* first field */
289
    put_byte(pb, MAT_FIRST_FIELD);
290
    put_byte(pb, 4);
291
    put_be32(pb, 0);
292

    
293
    /* last field */
294
    put_byte(pb, MAT_LAST_FIELD);
295
    put_byte(pb, 4);
296
    put_be32(pb, gxf->nb_fields);
297

    
298
    /* reserved */
299
    put_byte(pb, MAT_MARK_IN);
300
    put_byte(pb, 4);
301
    put_be32(pb, 0);
302

    
303
    put_byte(pb, MAT_MARK_OUT);
304
    put_byte(pb, 4);
305
    put_be32(pb, gxf->nb_fields);
306

    
307
    /* estimated size */
308
    put_byte(pb, MAT_SIZE);
309
    put_byte(pb, 4);
310
    put_be32(pb, url_fsize(pb) / 1024);
311

    
312
    return updateSize(pb, pos);
313
}
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315
static int gxf_write_track_description_section(AVFormatContext *s)
316
{
317
    GXFContext *gxf = s->priv_data;
318
    ByteIOContext *pb = s->pb;
319
    int64_t pos;
320
    int i;
321

    
322
    pos = url_ftell(pb);
323
    put_be16(pb, 0); /* size */
324
    for (i = 0; i < s->nb_streams; ++i)
325
        gxf_write_track_description(s, s->streams[i]->priv_data, i);
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327
    gxf_write_track_description(s, &gxf->timecode_track, s->nb_streams);
328

    
329
    return updateSize(pb, pos);
330
}
331

    
332
static int gxf_write_map_packet(AVFormatContext *s, int rewrite)
333
{
334
    GXFContext *gxf = s->priv_data;
335
    ByteIOContext *pb = s->pb;
336
    int64_t pos = url_ftell(pb);
337

    
338
    if (!rewrite) {
339
        if (!(gxf->map_offsets_nb % 30)) {
340
            gxf->map_offsets = av_realloc(gxf->map_offsets,
341
                                          (gxf->map_offsets_nb+30)*sizeof(*gxf->map_offsets));
342
            if (!gxf->map_offsets) {
343
                av_log(s, AV_LOG_ERROR, "could not realloc map offsets\n");
344
                return -1;
345
            }
346
        }
347
        gxf->map_offsets[gxf->map_offsets_nb++] = pos; // do not increment here
348
    }
349

    
350
    gxf_write_packet_header(pb, PKT_MAP);
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352
    /* preamble */
353
    put_byte(pb, 0xE0); /* version */
354
    put_byte(pb, 0xFF); /* reserved */
355

    
356
    gxf_write_material_data_section(s);
357
    gxf_write_track_description_section(s);
358

    
359
    return updatePacketSize(pb, pos);
360
}
361

    
362
static int gxf_write_flt_packet(AVFormatContext *s)
363
{
364
    GXFContext *gxf = s->priv_data;
365
    ByteIOContext *pb = s->pb;
366
    int64_t pos = url_ftell(pb);
367
    int fields_per_flt = (gxf->nb_fields+1) / 1000 + 1;
368
    int flt_entries = gxf->nb_fields / fields_per_flt - 1;
369
    int i = 0;
370

    
371
    gxf_write_packet_header(pb, PKT_FLT);
372

    
373
    put_le32(pb, fields_per_flt); /* number of fields */
374
    put_le32(pb, flt_entries); /* number of active flt entries */
375

    
376
    if (gxf->flt_entries) {
377
        for (i = 0; i < flt_entries; i++)
378
            put_le32(pb, gxf->flt_entries[(i*fields_per_flt)>>1]);
379
    }
380

    
381
    for (; i < 1000; i++)
382
        put_le32(pb, 0);
383

    
384
    return updatePacketSize(pb, pos);
385
}
386

    
387
static int gxf_write_umf_material_description(AVFormatContext *s)
388
{
389
    GXFContext *gxf = s->priv_data;
390
    ByteIOContext *pb = s->pb;
391
    int timecode_base = gxf->time_base.den == 60000 ? 60 : 50;
392

    
393
    // XXX drop frame
394
    uint32_t timecode =
395
        gxf->nb_fields / (timecode_base * 3600) % 24 << 24 | // hours
396
        gxf->nb_fields / (timecode_base * 60) % 60   << 16 | // minutes
397
        gxf->nb_fields /  timecode_base % 60         <<  8 | // seconds
398
        gxf->nb_fields %  timecode_base;                     // fields
399

    
400
    put_le32(pb, gxf->flags);
401
    put_le32(pb, gxf->nb_fields); /* length of the longest track */
402
    put_le32(pb, gxf->nb_fields); /* length of the shortest track */
403
    put_le32(pb, 0); /* mark in */
404
    put_le32(pb, gxf->nb_fields); /* mark out */
405
    put_le32(pb, 0); /* timecode mark in */
406
    put_le32(pb, timecode); /* timecode mark out */
407
    put_le64(pb, s->timestamp); /* modification time */
408
    put_le64(pb, s->timestamp); /* creation time */
409
    put_le16(pb, 0); /* reserved */
410
    put_le16(pb, 0); /* reserved */
411
    put_le16(pb, gxf->audio_tracks);
412
    put_le16(pb, 1); /* timecode track count */
413
    put_le16(pb, 0); /* reserved */
414
    put_le16(pb, gxf->mpeg_tracks);
415
    return 48;
416
}
417

    
418
static int gxf_write_umf_payload(AVFormatContext *s)
419
{
420
    GXFContext *gxf = s->priv_data;
421
    ByteIOContext *pb = s->pb;
422

    
423
    put_le32(pb, gxf->umf_length); /* total length of the umf data */
424
    put_le32(pb, 3); /* version */
425
    put_le32(pb, s->nb_streams+1);
426
    put_le32(pb, gxf->umf_track_offset); /* umf track section offset */
427
    put_le32(pb, gxf->umf_track_size);
428
    put_le32(pb, s->nb_streams+1);
429
    put_le32(pb, gxf->umf_media_offset);
430
    put_le32(pb, gxf->umf_media_size);
431
    put_le32(pb, gxf->umf_length); /* user data offset */
432
    put_le32(pb, 0); /* user data size */
433
    put_le32(pb, 0); /* reserved */
434
    put_le32(pb, 0); /* reserved */
435
    return 48;
436
}
437

    
438
static int gxf_write_umf_track_description(AVFormatContext *s)
439
{
440
    ByteIOContext *pb = s->pb;
441
    GXFContext *gxf = s->priv_data;
442
    int64_t pos = url_ftell(pb);
443
    int i;
444

    
445
    gxf->umf_track_offset = pos - gxf->umf_start_offset;
446
    for (i = 0; i < s->nb_streams; ++i) {
447
        GXFStreamContext *sc = s->streams[i]->priv_data;
448
        put_le16(pb, sc->media_info);
449
        put_le16(pb, 1);
450
    }
451

    
452
    put_le16(pb, gxf->timecode_track.media_info);
453
    put_le16(pb, 1);
454

    
455
    return url_ftell(pb) - pos;
456
}
457

    
458
static int gxf_write_umf_media_mpeg(ByteIOContext *pb, AVStream *st)
459
{
460
    GXFStreamContext *sc = st->priv_data;
461

    
462
    if (st->codec->pix_fmt == PIX_FMT_YUV422P)
463
        put_le32(pb, 2);
464
    else
465
        put_le32(pb, 1); /* default to 420 */
466
    put_le32(pb, sc->first_gop_closed == 1); /* closed = 1, open = 0, unknown = 255 */
467
    put_le32(pb, 3); /* top = 1, bottom = 2, frame = 3, unknown = 0 */
468
    put_le32(pb, 1); /* I picture per GOP */
469
    put_le32(pb, sc->p_per_gop);
470
    put_le32(pb, sc->b_per_i_or_p);
471
    if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO)
472
        put_le32(pb, 2);
473
    else if (st->codec->codec_id == CODEC_ID_MPEG1VIDEO)
474
        put_le32(pb, 1);
475
    else
476
        put_le32(pb, 0);
477
    put_le32(pb, 0); /* reserved */
478
    return 32;
479
}
480

    
481
static int gxf_write_umf_media_timecode(ByteIOContext *pb, GXFStreamContext *sc)
482
{
483
    put_le32(pb, 1); /* non drop frame */
484
    put_le32(pb, 0); /* reserved */
485
    put_le32(pb, 0); /* reserved */
486
    put_le32(pb, 0); /* reserved */
487
    put_le32(pb, 0); /* reserved */
488
    put_le32(pb, 0); /* reserved */
489
    put_le32(pb, 0); /* reserved */
490
    put_le32(pb, 0); /* reserved */
491
    return 32;
492
}
493

    
494
static int gxf_write_umf_media_dv(ByteIOContext *pb, GXFStreamContext *sc)
495
{
496
    int i;
497

    
498
    for (i = 0; i < 8; i++) {
499
        put_be32(pb, 0);
500
    }
501
    return 32;
502
}
503

    
504
static int gxf_write_umf_media_audio(ByteIOContext *pb, GXFStreamContext *sc)
505
{
506
    put_le64(pb, av_dbl2int(1)); /* sound level to begin to */
507
    put_le64(pb, av_dbl2int(1)); /* sound level to begin to */
508
    put_le32(pb, 0); /* number of fields over which to ramp up sound level */
509
    put_le32(pb, 0); /* number of fields over which to ramp down sound level */
510
    put_le32(pb, 0); /* reserved */
511
    put_le32(pb, 0); /* reserved */
512
    return 32;
513
}
514

    
515
#if 0
516
static int gxf_write_umf_media_mjpeg(ByteIOContext *pb, GXFStreamContext *sc)
517
{
518
    put_be64(pb, 0); /* FIXME FLOAT max chroma quant level */
519
    put_be64(pb, 0); /* FIXME FLOAT max luma quant level */
520
    put_be64(pb, 0); /* FIXME FLOAT min chroma quant level */
521
    put_be64(pb, 0); /* FIXME FLOAT min luma quant level */
522
    return 32;
523
}
524
#endif
525

    
526
static int gxf_write_umf_media_description(AVFormatContext *s)
527
{
528
    GXFContext *gxf = s->priv_data;
529
    ByteIOContext *pb = s->pb;
530
    int64_t pos;
531
    int i, j;
532

    
533
    pos = url_ftell(pb);
534
    gxf->umf_media_offset = pos - gxf->umf_start_offset;
535
    for (i = 0; i <= s->nb_streams; ++i) {
536
        GXFStreamContext *sc;
537
        int64_t startpos, curpos;
538

    
539
        if (i == s->nb_streams)
540
            sc = &gxf->timecode_track;
541
        else
542
            sc = s->streams[i]->priv_data;
543

    
544
        startpos = url_ftell(pb);
545
        put_le16(pb, 0); /* length */
546
        put_le16(pb, sc->media_info);
547
        put_le16(pb, 0); /* reserved */
548
        put_le16(pb, 0); /* reserved */
549
        put_le32(pb, gxf->nb_fields);
550
        put_le32(pb, 0); /* attributes rw, ro */
551
        put_le32(pb, 0); /* mark in */
552
        put_le32(pb, gxf->nb_fields); /* mark out */
553
        put_buffer(pb, ES_NAME_PATTERN, sizeof(ES_NAME_PATTERN));
554
        put_be16(pb, sc->media_info);
555
        for (j = sizeof(ES_NAME_PATTERN)+2; j < 88; j++)
556
            put_byte(pb, 0);
557
        put_le32(pb, sc->track_type);
558
        put_le32(pb, sc->sample_rate);
559
        put_le32(pb, sc->sample_size);
560
        put_le32(pb, 0); /* reserved */
561

    
562
        if (sc == &gxf->timecode_track)
563
            gxf_write_umf_media_timecode(pb, sc); /* 8 0bytes */
564
        else {
565
            AVStream *st = s->streams[i];
566
            switch (st->codec->codec_id) {
567
            case CODEC_ID_MPEG2VIDEO:
568
                gxf_write_umf_media_mpeg(pb, st);
569
                break;
570
            case CODEC_ID_PCM_S16LE:
571
                gxf_write_umf_media_audio(pb, sc);
572
                break;
573
            case CODEC_ID_DVVIDEO:
574
                gxf_write_umf_media_dv(pb, sc);
575
                break;
576
            }
577
        }
578

    
579
        curpos = url_ftell(pb);
580
        url_fseek(pb, startpos, SEEK_SET);
581
        put_le16(pb, curpos - startpos);
582
        url_fseek(pb, curpos, SEEK_SET);
583
    }
584
    return url_ftell(pb) - pos;
585
}
586

    
587
static int gxf_write_umf_packet(AVFormatContext *s)
588
{
589
    GXFContext *gxf = s->priv_data;
590
    ByteIOContext *pb = s->pb;
591
    int64_t pos = url_ftell(pb);
592

    
593
    gxf_write_packet_header(pb, PKT_UMF);
594

    
595
    /* preamble */
596
    put_byte(pb, 3); /* first and last (only) packet */
597
    put_be32(pb, gxf->umf_length); /* data length */
598

    
599
    gxf->umf_start_offset = url_ftell(pb);
600
    gxf_write_umf_payload(s);
601
    gxf_write_umf_material_description(s);
602
    gxf->umf_track_size = gxf_write_umf_track_description(s);
603
    gxf->umf_media_size = gxf_write_umf_media_description(s);
604
    gxf->umf_length = url_ftell(pb) - gxf->umf_start_offset;
605
    return updatePacketSize(pb, pos);
606
}
607

    
608
static const int GXF_samples_per_frame[] = { 32768, 0 };
609

    
610
static void gxf_init_timecode_track(GXFStreamContext *sc, GXFStreamContext *vsc)
611
{
612
    if (!vsc)
613
        return;
614

    
615
    sc->media_type = vsc->sample_rate == 60 ? 7 : 8;
616
    sc->sample_rate = vsc->sample_rate;
617
    sc->media_info = ('T'<<8) | '0';
618
    sc->track_type = 3;
619
    sc->frame_rate_index = vsc->frame_rate_index;
620
    sc->lines_index = vsc->lines_index;
621
    sc->sample_size = 16;
622
    sc->fields = vsc->fields;
623
}
624

    
625
static int gxf_write_header(AVFormatContext *s)
626
{
627
    ByteIOContext *pb = s->pb;
628
    GXFContext *gxf = s->priv_data;
629
    GXFStreamContext *vsc = NULL;
630
    uint8_t tracks[255] = {0};
631
    int i, media_info = 0;
632

    
633
    if (url_is_streamed(pb)) {
634
        av_log(s, AV_LOG_ERROR, "gxf muxer does not support streamed output, patch welcome");
635
        return -1;
636
    }
637

    
638
    gxf->flags |= 0x00080000; /* material is simple clip */
639
    for (i = 0; i < s->nb_streams; ++i) {
640
        AVStream *st = s->streams[i];
641
        GXFStreamContext *sc = av_mallocz(sizeof(*sc));
642
        if (!sc)
643
            return AVERROR(ENOMEM);
644
        st->priv_data = sc;
645

    
646
        sc->media_type = ff_codec_get_tag(gxf_media_types, st->codec->codec_id);
647
        if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
648
            if (st->codec->codec_id != CODEC_ID_PCM_S16LE) {
649
                av_log(s, AV_LOG_ERROR, "only 16 BIT PCM LE allowed for now\n");
650
                return -1;
651
            }
652
            if (st->codec->sample_rate != 48000) {
653
                av_log(s, AV_LOG_ERROR, "only 48000hz sampling rate is allowed\n");
654
                return -1;
655
            }
656
            if (st->codec->channels != 1) {
657
                av_log(s, AV_LOG_ERROR, "only mono tracks are allowed\n");
658
                return -1;
659
            }
660
            sc->track_type = 2;
661
            sc->sample_rate = st->codec->sample_rate;
662
            av_set_pts_info(st, 64, 1, sc->sample_rate);
663
            sc->sample_size = 16;
664
            sc->frame_rate_index = -2;
665
            sc->lines_index = -2;
666
            sc->fields = -2;
667
            gxf->audio_tracks++;
668
            gxf->flags |= 0x04000000; /* audio is 16 bit pcm */
669
            media_info = 'A';
670
        } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
671
            if (i != 0) {
672
                av_log(s, AV_LOG_ERROR, "video stream must be the first track\n");
673
                return -1;
674
            }
675
            /* FIXME check from time_base ? */
676
            if (st->codec->height == 480 || st->codec->height == 512) { /* NTSC or NTSC+VBI */
677
                sc->frame_rate_index = 5;
678
                sc->sample_rate = 60;
679
                gxf->flags |= 0x00000080;
680
                gxf->time_base = (AVRational){ 1001, 60000 };
681
            } else { /* assume PAL */
682
                sc->frame_rate_index = 6;
683
                sc->media_type++;
684
                sc->sample_rate = 50;
685
                gxf->flags |= 0x00000040;
686
                gxf->time_base = (AVRational){ 1, 50 };
687
            }
688
            av_set_pts_info(st, 64, gxf->time_base.num, gxf->time_base.den);
689
            if (gxf_find_lines_index(st) < 0)
690
                sc->lines_index = -1;
691
            sc->sample_size = st->codec->bit_rate;
692
            sc->fields = 2; /* interlaced */
693

    
694
            vsc = sc;
695

    
696
            switch (st->codec->codec_id) {
697
            case CODEC_ID_MJPEG:
698
                sc->track_type = 1;
699
                gxf->flags |= 0x00004000;
700
                media_info = 'J';
701
                break;
702
            case CODEC_ID_MPEG1VIDEO:
703
                sc->track_type = 9;
704
                gxf->mpeg_tracks++;
705
                media_info = 'L';
706
                break;
707
            case CODEC_ID_MPEG2VIDEO:
708
                sc->first_gop_closed = -1;
709
                sc->track_type = 4;
710
                gxf->mpeg_tracks++;
711
                gxf->flags |= 0x00008000;
712
                media_info = 'M';
713
                break;
714
            case CODEC_ID_DVVIDEO:
715
                if (st->codec->pix_fmt == PIX_FMT_YUV422P) {
716
                    sc->media_type += 2;
717
                    sc->track_type = 6;
718
                    gxf->flags |= 0x00002000;
719
                    media_info = 'E';
720
                } else {
721
                    sc->track_type = 5;
722
                    gxf->flags |= 0x00001000;
723
                    media_info = 'D';
724
                }
725
                break;
726
            default:
727
                av_log(s, AV_LOG_ERROR, "video codec not supported\n");
728
                return -1;
729
            }
730
        }
731
        /* FIXME first 10 audio tracks are 0 to 9 next 22 are A to V */
732
        sc->media_info = media_info<<8 | ('0'+tracks[media_info]++);
733
        sc->order = s->nb_streams - st->index;
734
    }
735

    
736
    if (ff_audio_interleave_init(s, GXF_samples_per_frame, (AVRational){ 1, 48000 }) < 0)
737
        return -1;
738

    
739
    gxf_init_timecode_track(&gxf->timecode_track, vsc);
740
    gxf->flags |= 0x200000; // time code track is non-drop frame
741

    
742
    gxf_write_map_packet(s, 0);
743
    gxf_write_flt_packet(s);
744
    gxf_write_umf_packet(s);
745

    
746
    gxf->packet_count = 3;
747

    
748
    put_flush_packet(pb);
749
    return 0;
750
}
751

    
752
static int gxf_write_eos_packet(ByteIOContext *pb)
753
{
754
    int64_t pos = url_ftell(pb);
755

    
756
    gxf_write_packet_header(pb, PKT_EOS);
757
    return updatePacketSize(pb, pos);
758
}
759

    
760
static int gxf_write_trailer(AVFormatContext *s)
761
{
762
    GXFContext *gxf = s->priv_data;
763
    ByteIOContext *pb = s->pb;
764
    int64_t end;
765
    int i;
766

    
767
    ff_audio_interleave_close(s);
768

    
769
    gxf_write_eos_packet(pb);
770
    end = url_ftell(pb);
771
    url_fseek(pb, 0, SEEK_SET);
772
    /* overwrite map, flt and umf packets with new values */
773
    gxf_write_map_packet(s, 1);
774
    gxf_write_flt_packet(s);
775
    gxf_write_umf_packet(s);
776
    put_flush_packet(pb);
777
    /* update duration in all map packets */
778
    for (i = 1; i < gxf->map_offsets_nb; i++) {
779
        url_fseek(pb, gxf->map_offsets[i], SEEK_SET);
780
        gxf_write_map_packet(s, 1);
781
        put_flush_packet(pb);
782
    }
783

    
784
    url_fseek(pb, end, SEEK_SET);
785

    
786
    av_freep(&gxf->flt_entries);
787
    av_freep(&gxf->map_offsets);
788

    
789
    return 0;
790
}
791

    
792
static int gxf_parse_mpeg_frame(GXFStreamContext *sc, const uint8_t *buf, int size)
793
{
794
    uint32_t c=-1;
795
    int i;
796
    for(i=0; i<size-4 && c!=0x100; i++){
797
        c = (c<<8) + buf[i];
798
        if(c == 0x1B8 && sc->first_gop_closed == -1) /* GOP start code */
799
            sc->first_gop_closed= (buf[i+4]>>6)&1;
800
    }
801
    return (buf[i+1]>>3)&7;
802
}
803

    
804
static int gxf_write_media_preamble(AVFormatContext *s, AVPacket *pkt, int size)
805
{
806
    GXFContext *gxf = s->priv_data;
807
    ByteIOContext *pb = s->pb;
808
    AVStream *st = s->streams[pkt->stream_index];
809
    GXFStreamContext *sc = st->priv_data;
810
    unsigned field_nb;
811
    /* If the video is frame-encoded, the frame numbers shall be represented by
812
     * even field numbers.
813
     * see SMPTE360M-2004  6.4.2.1.3 Media field number */
814
    if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
815
        field_nb = gxf->nb_fields;
816
    } else {
817
        field_nb = av_rescale_rnd(pkt->dts, gxf->time_base.den,
818
                                  (int64_t)48000*gxf->time_base.num, AV_ROUND_UP);
819
    }
820

    
821
    put_byte(pb, sc->media_type);
822
    put_byte(pb, st->index);
823
    put_be32(pb, field_nb);
824
    if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
825
        put_be16(pb, 0);
826
        put_be16(pb, size / 2);
827
    } else if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
828
        int frame_type = gxf_parse_mpeg_frame(sc, pkt->data, pkt->size);
829
        if (frame_type == FF_I_TYPE) {
830
            put_byte(pb, 0x0d);
831
            sc->iframes++;
832
        } else if (frame_type == FF_B_TYPE) {
833
            put_byte(pb, 0x0f);
834
            sc->bframes++;
835
        } else {
836
            put_byte(pb, 0x0e);
837
            sc->pframes++;
838
        }
839
        put_be24(pb, size);
840
    } else if (st->codec->codec_id == CODEC_ID_DVVIDEO) {
841
        put_byte(pb, size / 4096);
842
        put_be24(pb, 0);
843
    } else
844
        put_be32(pb, size);
845
    put_be32(pb, field_nb);
846
    put_byte(pb, 1); /* flags */
847
    put_byte(pb, 0); /* reserved */
848
    return 16;
849
}
850

    
851
static int gxf_write_packet(AVFormatContext *s, AVPacket *pkt)
852
{
853
    GXFContext *gxf = s->priv_data;
854
    ByteIOContext *pb = s->pb;
855
    AVStream *st = s->streams[pkt->stream_index];
856
    int64_t pos = url_ftell(pb);
857
    int padding = 0;
858

    
859
    gxf_write_packet_header(pb, PKT_MEDIA);
860
    if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO && pkt->size % 4) /* MPEG-2 frames must be padded */
861
        padding = 4 - pkt->size % 4;
862
    else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
863
        padding = GXF_AUDIO_PACKET_SIZE - pkt->size;
864
    gxf_write_media_preamble(s, pkt, pkt->size + padding);
865
    put_buffer(pb, pkt->data, pkt->size);
866
    gxf_write_padding(pb, padding);
867

    
868
    if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
869
        if (!(gxf->flt_entries_nb % 500)) {
870
            gxf->flt_entries = av_realloc(gxf->flt_entries,
871
                                          (gxf->flt_entries_nb+500)*sizeof(*gxf->flt_entries));
872
            if (!gxf->flt_entries) {
873
                av_log(s, AV_LOG_ERROR, "could not reallocate flt entries\n");
874
                return -1;
875
            }
876
        }
877
        gxf->flt_entries[gxf->flt_entries_nb++] = url_ftell(pb) / 1024;
878
        gxf->nb_fields += 2; // count fields
879
    }
880

    
881
    updatePacketSize(pb, pos);
882

    
883
    gxf->packet_count++;
884
    if (gxf->packet_count == 100) {
885
        gxf_write_map_packet(s, 0);
886
        gxf->packet_count = 0;
887
    }
888

    
889
    put_flush_packet(pb);
890

    
891
    return 0;
892
}
893

    
894
static int gxf_compare_field_nb(AVFormatContext *s, AVPacket *next, AVPacket *cur)
895
{
896
    GXFContext *gxf = s->priv_data;
897
    AVPacket *pkt[2] = { cur, next };
898
    int i, field_nb[2];
899
    GXFStreamContext *sc[2];
900

    
901
    for (i = 0; i < 2; i++) {
902
        AVStream *st = s->streams[pkt[i]->stream_index];
903
        sc[i] = st->priv_data;
904
        if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
905
            field_nb[i] = av_rescale_rnd(pkt[i]->dts, gxf->time_base.den,
906
                                         (int64_t)48000*gxf->time_base.num, AV_ROUND_UP);
907
            field_nb[i] &= ~1; // compare against even field number because audio must be before video
908
        } else
909
            field_nb[i] = pkt[i]->dts; // dts are field based
910
    }
911

    
912
    return field_nb[1] > field_nb[0] ||
913
        (field_nb[1] == field_nb[0] && sc[1]->order > sc[0]->order);
914
}
915

    
916
static int gxf_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
917
{
918
    if (pkt && s->streams[pkt->stream_index]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
919
        pkt->duration = 2; // enforce 2 fields
920
    return ff_audio_rechunk_interleave(s, out, pkt, flush,
921
                               av_interleave_packet_per_dts, gxf_compare_field_nb);
922
}
923

    
924
AVOutputFormat gxf_muxer = {
925
    "gxf",
926
    NULL_IF_CONFIG_SMALL("GXF format"),
927
    NULL,
928
    "gxf",
929
    sizeof(GXFContext),
930
    CODEC_ID_PCM_S16LE,
931
    CODEC_ID_MPEG2VIDEO,
932
    gxf_write_header,
933
    gxf_write_packet,
934
    gxf_write_trailer,
935
    0,
936
    NULL,
937
    gxf_interleave_packet,
938
};