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1
/*
2
 * GXF muxer.
3
 * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>.
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 *
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 * This library is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 *
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 * This library 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
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; 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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 */
19

    
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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"
24

    
25
#define GXF_AUDIO_PACKET_SIZE 65536
26

    
27
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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} GXFStreamContext;
47

    
48
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;
68

    
69
typedef struct GXF_Lines {
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    int height;
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    int index;
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} GXF_Lines;
73

    
74

    
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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 },
83
};
84

    
85
static const CodecTag gxf_media_types[] = {
86
    { 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 },
90
    { CODEC_ID_MPEG2VIDEO,  11 }, /* NTSC */
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    { CODEC_ID_MPEG2VIDEO,  12 }, /* PAL */
92
    { CODEC_ID_DVVIDEO   ,  13 }, /* NTSC */
93
    { CODEC_ID_DVVIDEO   ,  14 }, /* PAL */
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    { CODEC_ID_DVVIDEO   ,  15 }, /* 50M NTSC */
95
    { 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 */
100
    { CODEC_ID_MPEG1VIDEO,  23 }, /* PAL */
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    { 0, 0 },
102
};
103

    
104
#define SERVER_PATH "/space/"
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#define ES_NAME_PATTERN "ES."
106

    
107
static int gxf_find_lines_index(GXFStreamContext *ctx)
108
{
109
    int i;
110

    
111
    for (i = 0; i < 6; ++i) {
112
        if (ctx->codec->height == gxf_lines_tab[i].height) {
113
            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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}
119

    
120
static void gxf_write_padding(ByteIOContext *pb, offset_t to_pad)
121
{
122
    for (; to_pad > 0; to_pad--) {
123
        put_byte(pb, 0);
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    }
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}
126

    
127
static offset_t updatePacketSize(ByteIOContext *pb, offset_t pos)
128
{
129
    offset_t curpos;
130
    int size;
131

    
132
    size = url_ftell(pb) - pos;
133
    if (size % 4) {
134
        gxf_write_padding(pb, 4 - size % 4);
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        size = url_ftell(pb) - pos;
136
    }
137
    curpos = url_ftell(pb);
138
    url_fseek(pb, pos + 6, SEEK_SET);
139
    put_be32(pb, size);
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    url_fseek(pb, curpos, SEEK_SET);
141
    return curpos - pos;
142
}
143

    
144
static offset_t updateSize(ByteIOContext *pb, offset_t pos)
145
{
146
    offset_t curpos;
147

    
148
    curpos = url_ftell(pb);
149
    url_fseek(pb, pos, SEEK_SET);
150
    put_be16(pb, curpos - pos - 2);
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    url_fseek(pb, curpos, SEEK_SET);
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    return curpos - pos;
153
}
154

    
155
static void gxf_write_packet_header(ByteIOContext *pb, pkt_type_t type)
156
{
157
    put_be32(pb, 0); /* packet leader for synchro */
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    put_byte(pb, 1);
159
    put_byte(pb, type); /* map packet */
160
    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 */
164
}
165

    
166
static int gxf_write_mpeg_auxiliary(ByteIOContext *pb, GXFStreamContext *ctx)
167
{
168
    char buffer[1024];
169
    int size;
170

    
171
    if (ctx->iframes) {
172
        ctx->p_per_gop = ctx->pframes / ctx->iframes;
173
        if (ctx->pframes % ctx->iframes)
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            ctx->p_per_gop++;
175
        if (ctx->pframes)
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            ctx->b_per_gop = ctx->bframes / ctx->pframes;
177
        if (ctx->p_per_gop > 9)
178
            ctx->p_per_gop = 9; /* ensure value won't take more than one char */
179
        if (ctx->b_per_gop > 9)
180
            ctx->b_per_gop = 9; /* ensure value won't take more than one char */
181
    }
182
    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, 0x4F);
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    put_byte(pb, size + 1);
189
    put_buffer(pb, (uint8_t *)buffer, size + 1);
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    return size + 3;
191
}
192

    
193
static int gxf_write_timecode_auxiliary(ByteIOContext *pb, GXFStreamContext *ctx)
194
{
195
    /* FIXME implement that */
196
    put_byte(pb, 0); /* fields */
197
    put_byte(pb, 0);  /* seconds */
198
    put_byte(pb, 0); /* minutes */
199
    put_byte(pb, 0); /* flags + hours */
200
    /* reserved */
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    put_be32(pb, 0);
202
    return 8;
203
}
204

    
205
static int gxf_write_track_description(ByteIOContext *pb, GXFStreamContext *stream)
206
{
207
    offset_t pos;
208

    
209
    /* track description section */
210
    put_byte(pb, stream->media_type + 0x80);
211
    put_byte(pb, stream->index + 0xC0);
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213
    pos = url_ftell(pb);
214
    put_be16(pb, 0); /* size */
215

    
216
    /* media file name */
217
    put_byte(pb, 0x4C);
218
    put_byte(pb, strlen(ES_NAME_PATTERN) + 3);
219
    put_tag(pb, ES_NAME_PATTERN);
220
    put_be16(pb, stream->media_info);
221
    put_byte(pb, 0);
222

    
223
    if (stream->codec->codec_id != CODEC_ID_MPEG2VIDEO) {
224
        /* auxiliary information */
225
        put_byte(pb, 0x4D);
226
        put_byte(pb, 8);
227
        if (stream->codec->codec_id == CODEC_ID_NONE)
228
            gxf_write_timecode_auxiliary(pb, stream);
229
        else
230
            put_le64(pb, 0);
231
    }
232

    
233
    /* file system version */
234
    put_byte(pb, 0x4E);
235
    put_byte(pb, 4);
236
    put_be32(pb, 0);
237

    
238
    if (stream->codec->codec_id == CODEC_ID_MPEG2VIDEO)
239
        gxf_write_mpeg_auxiliary(pb, stream);
240

    
241
    /* frame rate */
242
    put_byte(pb, 0x50);
243
    put_byte(pb, 4);
244
    put_be32(pb, stream->frame_rate_index);
245

    
246
    /* lines per frame */
247
    put_byte(pb, 0x51);
248
    put_byte(pb, 4);
249
    put_be32(pb, stream->lines_index);
250

    
251
    /* fields per frame */
252
    put_byte(pb, 0x52);
253
    put_byte(pb, 4);
254
    put_be32(pb, stream->fields);
255

    
256
    return updateSize(pb, pos);
257
}
258

    
259
static int gxf_write_material_data_section(ByteIOContext *pb, GXFContext *ctx)
260
{
261
    offset_t pos;
262
    const char *filename = strrchr(ctx->fc->filename, '/');
263

    
264
    pos = url_ftell(pb);
265
    put_be16(pb, 0); /* size */
266

    
267
    /* name */
268
    if (filename)
269
        filename++;
270
    else
271
        filename = ctx->fc->filename;
272
    put_byte(pb, 0x40);
273
    put_byte(pb, strlen(SERVER_PATH) + strlen(filename) + 1);
274
    put_tag(pb, SERVER_PATH);
275
    put_tag(pb, filename);
276
    put_byte(pb, 0);
277

    
278
    /* first field */
279
    put_byte(pb, 0x41);
280
    put_byte(pb, 4);
281
    put_be32(pb, 0);
282

    
283
    /* last field */
284
    put_byte(pb, 0x42);
285
    put_byte(pb, 4);
286
    put_be32(pb, ctx->nb_frames);
287

    
288
    /* reserved */
289
    put_byte(pb, 0x43);
290
    put_byte(pb, 4);
291
    put_be32(pb, 0);
292

    
293
    put_byte(pb, 0x44);
294
    put_byte(pb, 4);
295
    put_be32(pb, ctx->nb_frames);
296

    
297
    /* estimated size */
298
    put_byte(pb, 0x45);
299
    put_byte(pb, 4);
300
    put_be32(pb, url_fsize(pb) / 1024);
301

    
302
    return updateSize(pb, pos);
303
}
304

    
305
static int gxf_write_track_description_section(ByteIOContext *pb, GXFContext *ctx)
306
{
307
    offset_t pos;
308
    int i;
309

    
310
    pos = url_ftell(pb);
311
    put_be16(pb, 0); /* size */
312
    for (i = 0; i < ctx->fc->nb_streams; ++i)
313
        gxf_write_track_description(pb, &ctx->streams[i]);
314
    return updateSize(pb, pos);
315
}
316

    
317
static int gxf_write_map_packet(ByteIOContext *pb, GXFContext *ctx)
318
{
319
    offset_t pos = url_ftell(pb);
320

    
321
    gxf_write_packet_header(pb, PKT_MAP);
322

    
323
    /* preamble */
324
    put_byte(pb, 0xE0); /* version */
325
    put_byte(pb, 0xFF); /* reserved */
326

    
327
    gxf_write_material_data_section(pb, ctx);
328
    gxf_write_track_description_section(pb, ctx);
329

    
330
    return updatePacketSize(pb, pos);
331
}
332

    
333
#if 0
334
static int gxf_write_flt_packet(ByteIOContext *pb, GXFContext *ctx)
335
{
336
    offset_t pos = url_ftell(pb);
337
    int i;
338

339
    gxf_write_packet_header(pb, PKT_FLT);
340

341
    put_le32(pb, 1000); /* number of fields */
342
    put_le32(pb, 0); /* number of active flt entries */
343

344
    for (i = 0; i < 1000; ++i) {
345
        put_le32(pb, 0);
346
    }
347
    return updatePacketSize(pb, pos);
348
}
349
#endif
350

    
351
static int gxf_write_umf_material_description(ByteIOContext *pb, GXFContext *ctx)
352
{
353
    put_le32(pb, ctx->flags);
354
    put_le32(pb, ctx->nb_frames); /* length of the longest track */
355
    put_le32(pb, ctx->nb_frames); /* length of the shortest track */
356
    put_le32(pb, 0); /* mark in */
357
    put_le32(pb, ctx->nb_frames); /* mark out */
358
    put_le32(pb, 0); /* timecode mark in */
359
    put_le32(pb, ctx->nb_frames); /* timecode mark out */
360
    put_le64(pb, ctx->fc->timestamp); /* modification time */
361
    put_le64(pb, ctx->fc->timestamp); /* creation time */
362
    put_le16(pb, 0); /* reserved */
363
    put_le16(pb, 0); /* reserved */
364
    put_le16(pb, ctx->audio_tracks);
365
    put_le16(pb, 0); /* timecode track count */
366
    put_le16(pb, 0); /* reserved */
367
    put_le16(pb, ctx->mpeg_tracks);
368
    return 48;
369
}
370

    
371
static int gxf_write_umf_payload(ByteIOContext *pb, GXFContext *ctx)
372
{
373
    put_le32(pb, ctx->umf_length); /* total length of the umf data */
374
    put_le32(pb, 3); /* version */
375
    put_le32(pb, ctx->fc->nb_streams);
376
    put_le32(pb, ctx->umf_track_offset); /* umf track section offset */
377
    put_le32(pb, ctx->umf_track_size);
378
    put_le32(pb, ctx->fc->nb_streams);
379
    put_le32(pb, ctx->umf_media_offset);
380
    put_le32(pb, ctx->umf_media_size);
381
    put_le32(pb, ctx->umf_user_data_offset); /* user data offset */
382
    put_le32(pb, ctx->umf_user_data_size); /* user data size */
383
    put_le32(pb, 0); /* reserved */
384
    put_le32(pb, 0); /* reserved */
385
    return 48;
386
}
387

    
388
static int gxf_write_umf_track_description(ByteIOContext *pb, GXFContext *ctx)
389
{
390
    offset_t pos = url_ftell(pb);
391
    int tracks[255]={0};
392
    int i;
393

    
394
    ctx->umf_track_offset = pos - ctx->umf_start_offset;
395
    for (i = 0; i < ctx->fc->nb_streams; ++i) {
396
        AVStream *st = ctx->fc->streams[i];
397
        GXFStreamContext *sc = &ctx->streams[i];
398
        int id = 0;
399

    
400
        switch (st->codec->codec_id) {
401
        case CODEC_ID_MPEG1VIDEO: id= 'L'; break;
402
        case CODEC_ID_MPEG2VIDEO: id= 'M'; break;
403
        case CODEC_ID_PCM_S16LE:  id= 'A'; break;
404
        case CODEC_ID_DVVIDEO:    id= sc->track_type == 6 ? 'E' : 'D'; break;
405
        case CODEC_ID_MJPEG:      id= 'V'; break;
406
        }
407
        sc->media_info= id << 8;
408
        /* FIXME first 10 audio tracks are 0 to 9 next 22 are A to V */
409
        sc->media_info |= '0' + (tracks[id]++);
410
        put_le16(pb, sc->media_info);
411
        put_le16(pb, 1);
412
    }
413
    return url_ftell(pb) - pos;
414
}
415

    
416
static int gxf_write_umf_media_mpeg(ByteIOContext *pb, GXFStreamContext *stream)
417
{
418
    if (stream->codec->pix_fmt == PIX_FMT_YUV422P)
419
        put_le32(pb, 2);
420
    else
421
        put_le32(pb, 1); /* default to 420 */
422
    put_le32(pb, stream->first_gop_closed == 1); /* closed = 1, open = 0, unknown = 255 */
423
    put_le32(pb, 3); /* top = 1, bottom = 2, frame = 3, unknown = 0 */
424
    put_le32(pb, 1); /* I picture per GOP */
425
    put_le32(pb, stream->p_per_gop);
426
    put_le32(pb, stream->b_per_gop);
427
    if (stream->codec->codec_id == CODEC_ID_MPEG2VIDEO)
428
        put_le32(pb, 2);
429
    else if (stream->codec->codec_id == CODEC_ID_MPEG1VIDEO)
430
        put_le32(pb, 1);
431
    else
432
        put_le32(pb, 0);
433
    put_le32(pb, 0); /* reserved */
434
    return 32;
435
}
436

    
437
static int gxf_write_umf_media_timecode(ByteIOContext *pb, GXFStreamContext *track)
438
{
439
    /* FIXME implement */
440
    put_be32(pb, 0); /* drop frame flag */
441
    put_be32(pb, 0); /* reserved */
442
    put_be32(pb, 0); /* reserved */
443
    put_be32(pb, 0); /* reserved */
444
    put_be32(pb, 0); /* reserved */
445
    put_be32(pb, 0); /* reserved */
446
    put_be32(pb, 0); /* reserved */
447
    put_be32(pb, 0); /* reserved */
448
    return 32;
449
}
450

    
451
static int gxf_write_umf_media_dv(ByteIOContext *pb, GXFStreamContext *track)
452
{
453
    int i;
454

    
455
    for (i = 0; i < 8; i++) {
456
        put_be32(pb, 0);
457
    }
458
    return 32;
459
}
460

    
461
static int gxf_write_umf_media_audio(ByteIOContext *pb, GXFStreamContext *track)
462
{
463
    put_le64(pb, av_dbl2int(1)); /* sound level to begin to */
464
    put_le64(pb, av_dbl2int(1)); /* sound level to begin to */
465
    put_le32(pb, 0); /* number of fields over which to ramp up sound level */
466
    put_le32(pb, 0); /* number of fields over which to ramp down sound level */
467
    put_le32(pb, 0); /* reserved */
468
    put_le32(pb, 0); /* reserved */
469
    return 32;
470
}
471

    
472
#if 0
473
static int gxf_write_umf_media_mjpeg(ByteIOContext *pb, GXFStreamContext *track)
474
{
475
    put_be64(pb, 0); /* FIXME FLOAT max chroma quant level */
476
    put_be64(pb, 0); /* FIXME FLOAT max luma quant level */
477
    put_be64(pb, 0); /* FIXME FLOAT min chroma quant level */
478
    put_be64(pb, 0); /* FIXME FLOAT min luma quant level */
479
    return 32;
480
}
481
#endif
482

    
483
static int gxf_write_umf_media_description(ByteIOContext *pb, GXFContext *ctx)
484
{
485
    offset_t pos;
486
    int i;
487

    
488
    pos = url_ftell(pb);
489
    ctx->umf_media_offset = pos - ctx->umf_start_offset;
490
    for (i = 0; i < ctx->fc->nb_streams; ++i) {
491
        GXFStreamContext *sc = &ctx->streams[i];
492
        char buffer[88];
493
        offset_t startpos, curpos;
494
        int path_size = strlen(ES_NAME_PATTERN);
495

    
496
        memset(buffer, 0, 88);
497
        startpos = url_ftell(pb);
498
        put_le16(pb, 0); /* length */
499
        put_le16(pb, sc->media_info);
500
        put_le16(pb, 0); /* reserved */
501
        put_le16(pb, 0); /* reserved */
502
        put_le32(pb, ctx->nb_frames);
503
        put_le32(pb, 0); /* attributes rw, ro */
504
        put_le32(pb, 0); /* mark in */
505
        put_le32(pb, ctx->nb_frames); /* mark out */
506
        strncpy(buffer, ES_NAME_PATTERN, path_size);
507
        put_buffer(pb, (uint8_t *)buffer, path_size);
508
        put_be16(pb, sc->media_info);
509
        put_buffer(pb, (uint8_t *)buffer + path_size + 2, 88 - path_size - 2);
510
        put_le32(pb, sc->track_type);
511
        put_le32(pb, sc->sample_rate);
512
        put_le32(pb, sc->sample_size);
513
        put_le32(pb, 0); /* reserved */
514
        switch (sc->codec->codec_id) {
515
        case CODEC_ID_MPEG2VIDEO:
516
            gxf_write_umf_media_mpeg(pb, sc);
517
            break;
518
        case CODEC_ID_PCM_S16LE:
519
            gxf_write_umf_media_audio(pb, sc);
520
            break;
521
        case CODEC_ID_DVVIDEO:
522
            gxf_write_umf_media_dv(pb, sc);
523
            break;
524
        default:
525
            gxf_write_umf_media_timecode(pb, sc); /* 8 0bytes */
526
        }
527
        curpos = url_ftell(pb);
528
        url_fseek(pb, startpos, SEEK_SET);
529
        put_le16(pb, curpos - startpos);
530
        url_fseek(pb, curpos, SEEK_SET);
531
    }
532
    return url_ftell(pb) - pos;
533
}
534

    
535
static int gxf_write_umf_user_data(ByteIOContext *pb, GXFContext *ctx)
536
{
537
    offset_t pos = url_ftell(pb);
538
    ctx->umf_user_data_offset = pos - ctx->umf_start_offset;
539
    put_le32(pb, 20);
540
    put_le32(pb,  0);
541
    put_le16(pb,  0);
542
    put_le16(pb,  0);
543
    put_le32(pb,  0);
544
    put_byte(pb,  0);
545
    put_byte(pb,  0);
546
    put_byte(pb,  0);
547
    put_byte(pb,  0);
548
    return 20;
549
}
550

    
551
static int gxf_write_umf_packet(ByteIOContext *pb, GXFContext *ctx)
552
{
553
    offset_t pos = url_ftell(pb);
554

    
555
    gxf_write_packet_header(pb, PKT_UMF);
556

    
557
    /* preamble */
558
    put_byte(pb, 3); /* first and last (only) packet */
559
    put_be32(pb, ctx->umf_length); /* data length */
560

    
561
    ctx->umf_start_offset = url_ftell(pb);
562
    gxf_write_umf_payload(pb, ctx);
563
    gxf_write_umf_material_description(pb, ctx);
564
    ctx->umf_track_size = gxf_write_umf_track_description(pb, ctx);
565
    ctx->umf_media_size = gxf_write_umf_media_description(pb, ctx);
566
    ctx->umf_user_data_size = gxf_write_umf_user_data(pb, ctx);
567
    ctx->umf_length = url_ftell(pb) - ctx->umf_start_offset;
568
    return updatePacketSize(pb, pos);
569
}
570

    
571
static int gxf_write_header(AVFormatContext *s)
572
{
573
    ByteIOContext *pb = &s->pb;
574
    GXFContext *gxf = s->priv_data;
575
    int i;
576

    
577
    gxf->fc = s;
578
    gxf->flags |= 0x00080000; /* material is simple clip */
579
    for (i = 0; i < s->nb_streams; ++i) {
580
        AVStream *st = s->streams[i];
581
        GXFStreamContext *sc = &gxf->streams[i];
582

    
583
        sc->codec = st->codec;
584
        sc->index = i;
585
        sc->media_type = codec_get_tag(gxf_media_types, sc->codec->codec_id);
586
        if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
587
            if (st->codec->codec_id != CODEC_ID_PCM_S16LE) {
588
                av_log(s, AV_LOG_ERROR, "only 16 BIT PCM LE allowed for now\n");
589
                return -1;
590
            }
591
            if (st->codec->sample_rate != 48000) {
592
                av_log(s, AV_LOG_ERROR, "only 48000hz sampling rate is allowed\n");
593
                return -1;
594
            }
595
            if (st->codec->channels != 1) {
596
                av_log(s, AV_LOG_ERROR, "only mono tracks are allowed\n");
597
                return -1;
598
            }
599
            sc->track_type = 2;
600
            sc->sample_rate = st->codec->sample_rate;
601
            av_set_pts_info(st, 64, 1, sc->sample_rate);
602
            sc->sample_size = 16;
603
            sc->frame_rate_index = -2;
604
            sc->lines_index = -2;
605
            sc->fields = -2;
606
            gxf->audio_tracks++;
607
            gxf->flags |= 0x04000000; /* audio is 16 bit pcm */
608
            av_fifo_init(&sc->audio_buffer, 3*GXF_AUDIO_PACKET_SIZE);
609
        } else if (sc->codec->codec_type == CODEC_TYPE_VIDEO) {
610
            /* FIXME check from time_base ? */
611
            if (sc->codec->height == 480 || sc->codec->height == 512) { /* NTSC or NTSC+VBI */
612
                sc->frame_rate_index = 5;
613
                sc->sample_rate = 60;
614
                gxf->flags |= 0x00000080;
615
            } else { /* assume PAL */
616
                sc->frame_rate_index = 6;
617
                sc->media_type++;
618
                sc->sample_rate = 50;
619
                gxf->flags |= 0x00000040;
620
            }
621
            gxf->sample_rate = sc->sample_rate;
622
            av_set_pts_info(st, 64, 1, sc->sample_rate);
623
            if (gxf_find_lines_index(sc) < 0)
624
                sc->lines_index = -1;
625
            sc->sample_size = st->codec->bit_rate;
626
            sc->fields = 2; /* interlaced */
627
            switch (sc->codec->codec_id) {
628
            case CODEC_ID_MPEG2VIDEO:
629
                sc->first_gop_closed = -1;
630
                sc->track_type = 4;
631
                gxf->mpeg_tracks++;
632
                gxf->flags |= 0x00008000;
633
                break;
634
            case CODEC_ID_DVVIDEO:
635
                if (sc->codec->pix_fmt == PIX_FMT_YUV422P) {
636
                    sc->media_type += 2;
637
                    sc->track_type = 6;
638
                    gxf->flags |= 0x00002000;
639
                } else {
640
                    sc->track_type = 5;
641
                    gxf->flags |= 0x00001000;
642
                }
643
                break;
644
            default:
645
                av_log(NULL, AV_LOG_ERROR, "video codec not supported\n");
646
                return -1;
647
            }
648
        }
649
    }
650
    gxf_write_map_packet(pb, gxf);
651
    //gxf_write_flt_packet(pb, gxf);
652
    gxf_write_umf_packet(pb, gxf);
653
    put_flush_packet(pb);
654
    return 0;
655
}
656

    
657
static int gxf_write_eos_packet(ByteIOContext *pb, GXFContext *ctx)
658
{
659
    offset_t pos = url_ftell(pb);
660

    
661
    gxf_write_packet_header(pb, PKT_EOS);
662
    return updatePacketSize(pb, pos);
663
}
664

    
665
static int gxf_write_trailer(AVFormatContext *s)
666
{
667
    ByteIOContext *pb = &s->pb;
668
    GXFContext *gxf = s->priv_data;
669
    offset_t end;
670
    int i;
671

    
672
    for (i = 0; i < s->nb_streams; ++i) {
673
        if (s->streams[i]->codec->codec_type == CODEC_TYPE_AUDIO) {
674
            av_fifo_free(&gxf->streams[i].audio_buffer);
675
        }
676
        if (s->streams[i]->codec->frame_number > gxf->nb_frames)
677
            gxf->nb_frames = 2 * s->streams[i]->codec->frame_number;
678
    }
679

    
680
    gxf_write_eos_packet(pb, gxf);
681
    end = url_ftell(pb);
682
    url_fseek(pb, 0, SEEK_SET);
683
    /* overwrite map and umf packets with new values */
684
    gxf_write_map_packet(pb, gxf);
685
    //gxf_write_flt_packet(pb, gxf);
686
    gxf_write_umf_packet(pb, gxf);
687
    url_fseek(pb, end, SEEK_SET);
688
    return 0;
689
}
690

    
691
static int gxf_parse_mpeg_frame(GXFStreamContext *sc, const uint8_t *buf, int size)
692
{
693
    uint32_t c=-1;
694
    int i;
695
    for(i=0; i<size-4 && c!=0x100; i++){
696
        c = (c<<8) + buf[i];
697
        if(c == 0x1B8 && sc->first_gop_closed == -1) /* GOP start code */
698
            sc->first_gop_closed= (buf[i+4]>>6)&1;
699
    }
700
    return (buf[i+1]>>3)&7;
701
}
702

    
703
static int gxf_write_media_preamble(ByteIOContext *pb, GXFContext *ctx, AVPacket *pkt, int size)
704
{
705
    GXFStreamContext *sc = &ctx->streams[pkt->stream_index];
706
    int64_t dts = av_rescale(pkt->dts, ctx->sample_rate, sc->sample_rate);
707

    
708
    put_byte(pb, sc->media_type);
709
    put_byte(pb, sc->index);
710
    put_be32(pb, dts);
711
    if (sc->codec->codec_type == CODEC_TYPE_AUDIO) {
712
        put_be16(pb, 0);
713
        put_be16(pb, size / 2);
714
    } else if (sc->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
715
        int frame_type = gxf_parse_mpeg_frame(sc, pkt->data, pkt->size);
716
        if (frame_type == FF_I_TYPE) {
717
            put_byte(pb, 0x0d);
718
            sc->iframes++;
719
        } else if (frame_type == FF_B_TYPE) {
720
            put_byte(pb, 0x0f);
721
            sc->bframes++;
722
        } else {
723
            put_byte(pb, 0x0e);
724
            sc->pframes++;
725
        }
726
        put_be24(pb, size);
727
    } else if (sc->codec->codec_id == CODEC_ID_DVVIDEO) {
728
        put_byte(pb, size / 4096);
729
        put_be24(pb, 0);
730
    } else
731
        put_be32(pb, size);
732
    put_be32(pb, dts);
733
    put_byte(pb, 1); /* flags */
734
    put_byte(pb, 0); /* reserved */
735
    return 16;
736
}
737

    
738
static int gxf_write_media_packet(ByteIOContext *pb, GXFContext *ctx, AVPacket *pkt)
739
{
740
    GXFStreamContext *sc = &ctx->streams[pkt->stream_index];
741
    offset_t pos = url_ftell(pb);
742
    int padding = 0;
743

    
744
    gxf_write_packet_header(pb, PKT_MEDIA);
745
    if (sc->codec->codec_id == CODEC_ID_MPEG2VIDEO && pkt->size % 4) /* MPEG-2 frames must be padded */
746
        padding = 4 - pkt->size % 4;
747
    else if (sc->codec->codec_type == CODEC_TYPE_AUDIO)
748
        padding = GXF_AUDIO_PACKET_SIZE - pkt->size;
749
    gxf_write_media_preamble(pb, ctx, pkt, pkt->size + padding);
750
    put_buffer(pb, pkt->data, pkt->size);
751
    gxf_write_padding(pb, padding);
752
    return updatePacketSize(pb, pos);
753
}
754

    
755
static int gxf_write_packet(AVFormatContext *s, AVPacket *pkt)
756
{
757
    GXFContext *gxf = s->priv_data;
758

    
759
    gxf_write_media_packet(&s->pb, gxf, pkt);
760
    put_flush_packet(&s->pb);
761
    return 0;
762
}
763

    
764
static int gxf_new_audio_packet(GXFContext *gxf, GXFStreamContext *sc, AVPacket *pkt, int flush)
765
{
766
    int size = flush ? av_fifo_size(&sc->audio_buffer) : GXF_AUDIO_PACKET_SIZE;
767

    
768
    if (!size)
769
        return 0;
770
    av_new_packet(pkt, size);
771
    av_fifo_read(&sc->audio_buffer, pkt->data, size);
772
    pkt->stream_index = sc->index;
773
    pkt->dts = sc->current_dts;
774
    sc->current_dts += size / 2; /* we only support 16 bit pcm mono for now */
775
    return size;
776
}
777

    
778
static int gxf_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
779
{
780
    GXFContext *gxf = s->priv_data;
781
    AVPacket new_pkt;
782
    int i;
783

    
784
    for (i = 0; i < s->nb_streams; i++) {
785
        if (s->streams[i]->codec->codec_type == CODEC_TYPE_AUDIO) {
786
            GXFStreamContext *sc = &gxf->streams[i];
787
            if (pkt && pkt->stream_index == i) {
788
                av_fifo_write(&sc->audio_buffer, pkt->data, pkt->size);
789
                pkt = NULL;
790
            }
791
            if (flush || av_fifo_size(&sc->audio_buffer) >= GXF_AUDIO_PACKET_SIZE) {
792
                if (gxf_new_audio_packet(gxf, sc, &new_pkt, flush) > 0) {
793
                    pkt = &new_pkt;
794
                    break; /* add pkt right now into list */
795
                }
796
            }
797
        }
798
    }
799
    return av_interleave_packet_per_dts(s, out, pkt, flush);
800
}
801

    
802
AVOutputFormat gxf_muxer = {
803
    "gxf",
804
    "GXF format",
805
    NULL,
806
    "gxf",
807
    sizeof(GXFContext),
808
    CODEC_ID_PCM_S16LE,
809
    CODEC_ID_MPEG2VIDEO,
810
    gxf_write_header,
811
    gxf_write_packet,
812
    gxf_write_trailer,
813
    0,
814
    NULL,
815
    gxf_interleave_packet,
816
};