av_log() patch by (Michel Bardiaux <mbardiaux at peaktime dot be>)
[libav.git] / libavformat / dv.c
CommitLineData
f20dca40 1/*
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2 * General DV muxer/demuxer
3 * Copyright (c) 2003 Roman Shaposhnick
4 *
5 * Many thanks to Dan Dennedy <dan@dennedy.org> for providing wealth
6 * of DV technical info.
7 *
f20dca40
FB
8 * Raw DV format
9 * Copyright (c) 2002 Fabrice Bellard.
10 *
11 * This library is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU Lesser General Public
13 * License as published by the Free Software Foundation; either
14 * version 2 of the License, or (at your option) any later version.
15 *
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * Lesser General Public License for more details.
20 *
21 * You should have received a copy of the GNU Lesser General Public
22 * License along with this library; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 */
7458ccbb 25#include <time.h>
f20dca40 26#include "avformat.h"
7458ccbb 27#include "dvdata.h"
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28#include "dv.h"
29
30struct DVDemuxContext {
31 AVFormatContext* fctx;
32 AVStream* vst;
33 AVStream* ast[2];
34 AVPacket audio_pkt[2];
35 int ach;
36};
f20dca40 37
ddaae6a9 38struct DVMuxContext {
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39 const DVprofile* sys; /* Current DV profile. E.g.: 525/60, 625/50 */
40 uint8_t frame_buf[144000]; /* frame under contruction */
41 FifoBuffer audio_data; /* Fifo for storing excessive amounts of PCM */
42 int frames; /* Number of a current frame */
43 time_t start_time; /* Start time of recording */
44 uint8_t aspect; /* Aspect ID 0 - 4:3, 7 - 16:9 */
45 int has_audio; /* frame under contruction has audio */
46 int has_video; /* frame under contruction has video */
ddaae6a9 47};
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48
49enum dv_section_type {
50 dv_sect_header = 0x1f,
51 dv_sect_subcode = 0x3f,
52 dv_sect_vaux = 0x56,
53 dv_sect_audio = 0x76,
54 dv_sect_video = 0x96,
55};
56
57enum dv_pack_type {
58 dv_header525 = 0x3f, /* see dv_write_pack for important details on */
59 dv_header625 = 0xbf, /* these two packs */
60 dv_timecode = 0x13,
61 dv_audio_source = 0x50,
62 dv_audio_control = 0x51,
63 dv_audio_recdate = 0x52,
64 dv_audio_rectime = 0x53,
65 dv_video_source = 0x60,
66 dv_video_control = 0x61,
67 dv_viedo_recdate = 0x62,
68 dv_video_rectime = 0x63,
69 dv_unknown_pack = 0xff,
70};
71
72
73
74/*
75 * The reason why the following three big ugly looking tables are
76 * here is my lack of DV spec IEC 61834. The tables were basically
77 * constructed to make code that places packs in SSYB, VAUX and
78 * AAUX blocks very simple and table-driven. They conform to the
79 * SMPTE 314M and the output of my personal DV camcorder, neither
80 * of which is sufficient for a reliable DV stream producing. Thus
81 * while code is still in development I'll be gathering input from
82 * people with different DV equipment and modifying the tables to
83 * accommodate all the quirks. Later on, if possible, some of them
84 * will be folded into smaller tables and/or switch-if logic. For
85 * now, my only excuse is -- they don't eat up that much of a space.
86 */
87
88static const int dv_ssyb_packs_dist[12][6] = {
89 { 0x13, 0x13, 0x13, 0x13, 0x13, 0x13 },
90 { 0x13, 0x13, 0x13, 0x13, 0x13, 0x13 },
91 { 0x13, 0x13, 0x13, 0x13, 0x13, 0x13 },
92 { 0x13, 0x13, 0x13, 0x13, 0x13, 0x13 },
93 { 0x13, 0x13, 0x13, 0x13, 0x13, 0x13 },
94 { 0x13, 0x13, 0x13, 0x13, 0x13, 0x13 },
95 { 0x13, 0x62, 0x63, 0x13, 0x62, 0x63 },
96 { 0x13, 0x62, 0x63, 0x13, 0x62, 0x63 },
97 { 0x13, 0x62, 0x63, 0x13, 0x62, 0x63 },
98 { 0x13, 0x62, 0x63, 0x13, 0x62, 0x63 },
99 { 0x13, 0x62, 0x63, 0x13, 0x62, 0x63 },
100 { 0x13, 0x62, 0x63, 0x13, 0x62, 0x63 },
101};
102
103static const int dv_vaux_packs_dist[12][15] = {
104 { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
105 0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
106 { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
107 0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
108 { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
109 0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
110 { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
111 0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
112 { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
113 0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
114 { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
115 0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
116 { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
117 0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
118 { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
119 0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
120 { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
121 0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
122 { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
123 0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
124 { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
125 0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
126 { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
127 0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
128};
129
130static const int dv_aaux_packs_dist[12][9] = {
131 { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
132 { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
133 { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
134 { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
135 { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
136 { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
137 { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
138 { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
139 { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
140 { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
141 { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
142 { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
143};
144
145static inline uint16_t dv_audio_12to16(uint16_t sample)
146{
147 uint16_t shift, result;
148
149 sample = (sample < 0x800) ? sample : sample | 0xf000;
150 shift = (sample & 0xf00) >> 8;
151
152 if (shift < 0x2 || shift > 0xd) {
153 result = sample;
154 } else if (shift < 0x8) {
155 shift--;
156 result = (sample - (256 * shift)) << shift;
157 } else {
158 shift = 0xe - shift;
159 result = ((sample + ((256 * shift) + 1)) << shift) - 1;
160 }
161
162 return result;
163}
164
165static int dv_audio_frame_size(const DVprofile* sys, int frame)
f20dca40 166{
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167 return sys->audio_samples_dist[frame % (sizeof(sys->audio_samples_dist)/
168 sizeof(sys->audio_samples_dist[0]))];
169}
f20dca40 170
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171static int dv_write_pack(enum dv_pack_type pack_id, DVMuxContext *c, uint8_t* buf)
172{
173 struct tm tc;
174 time_t ct;
175 int ltc_frame;
425ed6e2 176
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177 buf[0] = (uint8_t)pack_id;
178 switch (pack_id) {
179 case dv_header525: /* I can't imagine why these two weren't defined as real */
180 case dv_header625: /* packs in SMPTE314M -- they definitely look like ones */
181 buf[1] = 0xf8 | /* reserved -- always 1 */
182 (0 & 0x07); /* APT: Track application ID */
183 buf[2] = (0 << 7) | /* TF1: audio data is 0 - valid; 1 - invalid */
184 (0x0f << 3) | /* reserved -- always 1 */
185 (0 & 0x07); /* AP1: Audio application ID */
186 buf[3] = (0 << 7) | /* TF2: video data is 0 - valid; 1 - invalid */
187 (0x0f << 3) | /* reserved -- always 1 */
188 (0 & 0x07); /* AP2: Video application ID */
189 buf[4] = (0 << 7) | /* TF3: subcode(SSYB) is 0 - valid; 1 - invalid */
190 (0x0f << 3) | /* reserved -- always 1 */
191 (0 & 0x07); /* AP3: Subcode application ID */
192 break;
193 case dv_timecode:
194 ct = (time_t)(c->frames / ((float)c->sys->frame_rate /
195 (float)c->sys->frame_rate_base));
196 localtime_r(&ct, &tc);
197 /*
198 * LTC drop-frame frame counter drops two frames (0 and 1) every
199 * minute, unless it is exactly divisible by 10
200 */
201 ltc_frame = (c->frames + 2*ct/60 - 2*ct/600) % c->sys->ltc_divisor;
202 buf[1] = (0 << 7) | /* Color fame: 0 - unsync; 1 - sync mode */
203 (1 << 6) | /* Drop frame timecode: 0 - nondrop; 1 - drop */
204 ((ltc_frame / 10) << 4) | /* Tens of frames */
205 (ltc_frame % 10); /* Units of frames */
206 buf[2] = (1 << 7) | /* Biphase mark polarity correction: 0 - even; 1 - odd */
207 ((tc.tm_sec / 10) << 4) | /* Tens of seconds */
208 (tc.tm_sec % 10); /* Units of seconds */
209 buf[3] = (1 << 7) | /* Binary group flag BGF0 */
210 ((tc.tm_min / 10) << 4) | /* Tens of minutes */
211 (tc.tm_min % 10); /* Units of minutes */
212 buf[4] = (1 << 7) | /* Binary group flag BGF2 */
213 (1 << 6) | /* Binary group flag BGF1 */
214 ((tc.tm_hour / 10) << 4) | /* Tens of hours */
215 (tc.tm_hour % 10); /* Units of hours */
216 break;
217 case dv_audio_source: /* AAUX source pack */
218 buf[1] = (0 << 7) | /* locked mode */
219 (1 << 6) | /* reserved -- always 1 */
220 (dv_audio_frame_size(c->sys, c->frames) -
221 c->sys->audio_min_samples[0]);
222 /* # of samples */
223 buf[2] = (0 << 7) | /* multi-stereo */
224 (0 << 5) | /* #of audio channels per block: 0 -- 1 channel */
225 (0 << 4) | /* pair bit: 0 -- one pair of channels */
226 0; /* audio mode */
227 buf[3] = (1 << 7) | /* res */
228 (1 << 6) | /* multi-language flag */
229 (c->sys->dsf << 5) | /* system: 60fields/50fields */
230 0; /* definition: 0 -- SD (525/625) */
231 buf[4] = (1 << 7) | /* emphasis: 1 -- off */
232 (0 << 6) | /* emphasis time constant: 0 -- reserved */
233 (0 << 3) | /* frequency: 0 -- 48Khz, 1 -- 44,1Khz, 2 -- 32Khz */
234 0; /* quantization: 0 -- 16bit linear, 1 -- 12bit nonlinear */
235 break;
236 case dv_audio_control:
237 buf[1] = (0 << 6) | /* copy protection: 0 -- unrestricted */
238 (1 << 4) | /* input source: 1 -- digital input */
239 (3 << 2) | /* compression: 3 -- no information */
240 0; /* misc. info/SMPTE emphasis off */
241 buf[2] = (1 << 7) | /* recording start point: 1 -- no */
242 (1 << 6) | /* recording end point: 1 -- no */
243 (1 << 3) | /* recording mode: 1 -- original */
244 7;
245 buf[3] = (1 << 7) | /* direction: 1 -- forward */
246 0x20; /* speed */
247 buf[4] = (1 << 7) | /* reserved -- always 1 */
248 0x7f; /* genre category */
249 break;
250 case dv_audio_recdate:
251 case dv_viedo_recdate: /* VAUX recording date */
252 ct = c->start_time + (time_t)(c->frames /
253 ((float)c->sys->frame_rate / (float)c->sys->frame_rate_base));
254 localtime_r(&ct, &tc);
255 buf[1] = 0xff; /* ds, tm, tens of time zone, units of time zone */
256 /* 0xff is very likely to be "unknown" */
257 buf[2] = (3 << 6) | /* reserved -- always 1 */
258 ((tc.tm_mday / 10) << 4) | /* Tens of day */
259 (tc.tm_mday % 10); /* Units of day */
260 buf[3] = /* we set high 4 bits to 0, shouldn't we set them to week? */
261 (tc.tm_mon % 10); /* Units of month */
262 buf[4] = (((tc.tm_year % 100) / 10) << 4) | /* Tens of year */
263 (tc.tm_year % 10); /* Units of year */
264 break;
265 case dv_audio_rectime: /* AAUX recording time */
266 case dv_video_rectime: /* VAUX recording time */
267 ct = c->start_time + (time_t)(c->frames /
268 ((float)c->sys->frame_rate / (float)c->sys->frame_rate_base));
269 localtime_r(&ct, &tc);
270 buf[1] = (3 << 6) | /* reserved -- always 1 */
271 0x3f; /* tens of frame, units of frame: 0x3f - "unknown" ? */
272 buf[2] = (1 << 7) | /* reserved -- always 1 */
273 ((tc.tm_sec / 10) << 4) | /* Tens of seconds */
274 (tc.tm_sec % 10); /* Units of seconds */
275 buf[3] = (1 << 7) | /* reserved -- always 1 */
276 ((tc.tm_min / 10) << 4) | /* Tens of minutes */
277 (tc.tm_min % 10); /* Units of minutes */
278 buf[4] = (3 << 6) | /* reserved -- always 1 */
279 ((tc.tm_hour / 10) << 4) | /* Tens of hours */
280 (tc.tm_hour % 10); /* Units of hours */
281 break;
282 case dv_video_source:
283 buf[1] = 0xff; /* reserved -- always 1 */
284 buf[2] = (1 << 7) | /* B/W: 0 - b/w, 1 - color */
285 (1 << 6) | /* following CLF is valid - 0, invalid - 1 */
286 (3 << 4) | /* CLF: color frames id (see ITU-R BT.470-4) */
287 0xf; /* reserved -- always 1 */
288 buf[3] = (3 << 6) | /* reserved -- always 1 */
289 (c->sys->dsf << 5) | /* system: 60fields/50fields */
290 0; /* signal type video compression */
291 buf[4] = 0xff; /* VISC: 0xff -- no information */
292 break;
293 case dv_video_control:
294 buf[1] = (0 << 6) | /* Copy generation management (CGMS) 0 -- free */
295 0x3f; /* reserved -- always 1 */
296 buf[2] = 0xc8 | /* reserved -- always b11001xxx */
297 c->aspect;
298 buf[3] = (1 << 7) | /* Frame/field flag 1 -- frame, 0 -- field */
299 (1 << 6) | /* First/second field flag 0 -- field 2, 1 -- field 1 */
300 (1 << 5) | /* Frame change flag 0 -- same picture as before, 1 -- different */
301 (1 << 4) | /* 1 - interlaced, 0 - noninterlaced */
302 0xc; /* reserved -- always b1100 */
303 buf[4] = 0xff; /* reserved -- always 1 */
304 break;
305 default:
306 buf[1] = buf[2] = buf[3] = buf[4] = 0xff;
307 }
308 return 5;
309}
f20dca40 310
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311static inline int dv_write_dif_id(enum dv_section_type t, uint8_t seq_num,
312 uint8_t dif_num, uint8_t* buf)
313{
314 buf[0] = (uint8_t)t; /* Section type */
315 buf[1] = (seq_num<<4) | /* DIF seq number 0-9 for 525/60; 0-11 for 625/50 */
316 (0 << 3) | /* FSC: for 50Mb/s 0 - first channel; 1 - second */
317 7; /* reserved -- always 1 */
318 buf[2] = dif_num; /* DIF block number Video: 0-134, Audio: 0-8 */
319 return 3;
320}
425ed6e2 321
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322static inline int dv_write_ssyb_id(uint8_t syb_num, uint8_t fr, uint8_t* buf)
323{
324 if (syb_num == 0 || syb_num == 6) {
325 buf[0] = (fr<<7) | /* FR ID 1 - first half of each channel; 0 - second */
326 (0<<4) | /* AP3 (Subcode application ID) */
327 0x0f; /* reserved -- always 1 */
328 }
329 else if (syb_num == 11) {
330 buf[0] = (fr<<7) | /* FR ID 1 - first half of each channel; 0 - second */
331 0x7f; /* reserved -- always 1 */
332 }
333 else {
334 buf[0] = (fr<<7) | /* FR ID 1 - first half of each channel; 0 - second */
335 (0<<4) | /* APT (Track application ID) */
336 0x0f; /* reserved -- always 1 */
337 }
338 buf[1] = 0xf0 | /* reserved -- always 1 */
339 (syb_num & 0x0f); /* SSYB number 0 - 11 */
340 buf[2] = 0xff; /* reserved -- always 1 */
341 return 3;
342}
343
344static void dv_format_frame(DVMuxContext *c, uint8_t* buf)
345{
346 int i, j, k;
347
348 for (i = 0; i < c->sys->difseg_size; i++) {
349 memset(buf, 0xff, 80 * 6); /* First 6 DIF blocks are for control data */
350
351 /* DV header: 1DIF */
352 buf += dv_write_dif_id(dv_sect_header, i, 0, buf);
353 buf += dv_write_pack((c->sys->dsf ? dv_header625 : dv_header525), c, buf);
354 buf += 72; /* unused bytes */
355
356 /* DV subcode: 2DIFs */
357 for (j = 0; j < 2; j++) {
358 buf += dv_write_dif_id( dv_sect_subcode, i, j, buf);
359 for (k = 0; k < 6; k++) {
360 buf += dv_write_ssyb_id(k, (i < c->sys->difseg_size/2), buf);
361 buf += dv_write_pack(dv_ssyb_packs_dist[i][k], c, buf);
362 }
363 buf += 29; /* unused bytes */
364 }
365
366 /* DV VAUX: 3DIFs */
367 for (j = 0; j < 3; j++) {
368 buf += dv_write_dif_id(dv_sect_vaux, i, j, buf);
369 for (k = 0; k < 15 ; k++)
370 buf += dv_write_pack(dv_vaux_packs_dist[i][k], c, buf);
371 buf += 2; /* unused bytes */
372 }
373
374 /* DV Audio/Video: 135 Video DIFs + 9 Audio DIFs */
375 for (j = 0; j < 135; j++) {
376 if (j%15 == 0) {
377 buf += dv_write_dif_id(dv_sect_audio, i, j/15, buf);
378 buf += dv_write_pack(dv_aaux_packs_dist[i][j/15], c, buf);
379 buf += 72; /* shuffled PCM audio */
380 }
381 buf += dv_write_dif_id(dv_sect_video, i, j, buf);
382 buf += 77; /* 1 video macro block: 1 bytes control
383 4 * 14 bytes Y 8x8 data
384 10 bytes Cr 8x8 data
385 10 bytes Cb 8x8 data */
386 }
387 }
388}
389
390static void dv_inject_audio(DVMuxContext *c, const uint8_t* pcm, uint8_t* frame_ptr)
391{
392 int i, j, d, of;
393 for (i = 0; i < c->sys->difseg_size; i++) {
394 frame_ptr += 6 * 80; /* skip DIF segment header */
395 for (j = 0; j < 9; j++) {
396 for (d = 8; d < 80; d+=2) {
397 of = c->sys->audio_shuffle[i][j] + (d - 8)/2 * c->sys->audio_stride;
398 frame_ptr[d] = pcm[of*2+1]; // FIXME: may be we have to admit
399 frame_ptr[d+1] = pcm[of*2]; // that DV is a big endian PCM
400 }
401 frame_ptr += 16 * 80; /* 15 Video DIFs + 1 Audio DIF */
402 }
403 }
404}
405
406static void dv_inject_video(DVMuxContext *c, const uint8_t* video_data, uint8_t* frame_ptr)
407{
408 int i, j;
409 int ptr = 0;
410
411 for (i = 0; i < c->sys->difseg_size; i++) {
412 ptr += 6 * 80; /* skip DIF segment header */
413 for (j = 0; j < 135; j++) {
414 if (j%15 == 0)
415 ptr += 80; /* skip Audio DIF */
416 ptr += 3;
417 memcpy(frame_ptr + ptr, video_data + ptr, 77);
418 ptr += 77;
419 }
420 }
421}
422
423/*
424 * This is the dumbest implementation of all -- it simply looks at
425 * a fixed offset and if pack isn't there -- fails. We might want
426 * to have a fallback mechanism for complete search of missing packs.
427 */
428static const uint8_t* dv_extract_pack(uint8_t* frame, enum dv_pack_type t)
429{
430 int offs;
431
432 switch (t) {
433 case dv_audio_source:
434 offs = (80*6 + 80*16*3 + 3);
435 break;
436 case dv_audio_control:
437 offs = (80*6 + 80*16*4 + 3);
438 break;
439 case dv_video_control:
440 offs = (80*5 + 48 + 5);
441 break;
442 default:
443 return NULL;
444 }
445
446 return (frame[offs] == t ? &frame[offs] : NULL);
447}
448
449/*
450 * There's a couple of assumptions being made here:
451 * 1. By default we silence erroneous (0x8000/16bit 0x800/12bit) audio samples.
452 * We can pass them upwards when ffmpeg will be ready to deal with them.
453 * 2. We don't do software emphasis.
454 * 3. Audio is always returned as 16bit linear samples: 12bit nonlinear samples
455 * are converted into 16bit linear ones.
456 */
ddaae6a9 457static int dv_extract_audio(uint8_t* frame, uint8_t* pcm, uint8_t* pcm2)
7458ccbb 458{
ddaae6a9 459 int size, i, j, d, of, smpls, freq, quant, half_ch;
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460 uint16_t lc, rc;
461 const DVprofile* sys;
462 const uint8_t* as_pack;
463
464 as_pack = dv_extract_pack(frame, dv_audio_source);
465 if (!as_pack) /* No audio ? */
466 return 0;
467
468 sys = dv_frame_profile(frame);
469 smpls = as_pack[1] & 0x3f; /* samples in this frame - min. samples */
470 freq = (as_pack[4] >> 3) & 0x07; /* 0 - 48KHz, 1 - 44,1kHz, 2 - 32 kHz */
471 quant = as_pack[4] & 0x07; /* 0 - 16bit linear, 1 - 12bit nonlinear */
472
473 if (quant > 1)
474 return -1; /* Unsupported quantization */
475
476 size = (sys->audio_min_samples[freq] + smpls) * 4; /* 2ch, 2bytes */
ddaae6a9 477 half_ch = sys->difseg_size/2;
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478
479 /* for each DIF segment */
480 for (i = 0; i < sys->difseg_size; i++) {
481 frame += 6 * 80; /* skip DIF segment header */
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RS
482 if (quant == 1 && i == half_ch) {
483 if (!pcm2)
484 break;
485 else
486 pcm = pcm2;
487 }
488
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489 for (j = 0; j < 9; j++) {
490 for (d = 8; d < 80; d += 2) {
491 if (quant == 0) { /* 16bit quantization */
492 of = sys->audio_shuffle[i][j] + (d - 8)/2 * sys->audio_stride;
493 if (of*2 >= size)
494 continue;
495
496 pcm[of*2] = frame[d+1]; // FIXME: may be we have to admit
497 pcm[of*2+1] = frame[d]; // that DV is a big endian PCM
498 if (pcm[of*2+1] == 0x80 && pcm[of*2] == 0x00)
499 pcm[of*2+1] = 0;
500 } else { /* 12bit quantization */
7458ccbb
RS
501 lc = ((uint16_t)frame[d] << 4) |
502 ((uint16_t)frame[d+2] >> 4);
503 rc = ((uint16_t)frame[d+1] << 4) |
504 ((uint16_t)frame[d+2] & 0x0f);
505 lc = (lc == 0x800 ? 0 : dv_audio_12to16(lc));
506 rc = (rc == 0x800 ? 0 : dv_audio_12to16(rc));
507
ddaae6a9 508 of = sys->audio_shuffle[i%half_ch][j] + (d - 8)/3 * sys->audio_stride;
7458ccbb
RS
509 if (of*2 >= size)
510 continue;
511
512 pcm[of*2] = lc & 0xff; // FIXME: may be we have to admit
513 pcm[of*2+1] = lc >> 8; // that DV is a big endian PCM
ddaae6a9 514 of = sys->audio_shuffle[i%half_ch+half_ch][j] +
7458ccbb
RS
515 (d - 8)/3 * sys->audio_stride;
516 pcm[of*2] = rc & 0xff; // FIXME: may be we have to admit
517 pcm[of*2+1] = rc >> 8; // that DV is a big endian PCM
518 ++d;
519 }
520 }
521
522 frame += 16 * 80; /* 15 Video DIFs + 1 Audio DIF */
523 }
524 }
525
7458ccbb
RS
526 return size;
527}
528
ddaae6a9 529static int dv_extract_audio_info(DVDemuxContext* c, uint8_t* frame)
7458ccbb
RS
530{
531 const uint8_t* as_pack;
532 const DVprofile* sys;
ddaae6a9 533 int freq, smpls, quant, i;
7458ccbb
RS
534
535 sys = dv_frame_profile(frame);
536 as_pack = dv_extract_pack(frame, dv_audio_source);
ddaae6a9
RS
537 if (!as_pack || !sys) { /* No audio ? */
538 c->ach = 0;
7458ccbb 539 return -1;
ddaae6a9 540 }
7458ccbb
RS
541
542 smpls = as_pack[1] & 0x3f; /* samples in this frame - min. samples */
543 freq = (as_pack[4] >> 3) & 0x07; /* 0 - 48KHz, 1 - 44,1kHz, 2 - 32 kHz */
ddaae6a9
RS
544 quant = as_pack[4] & 0x07; /* 0 - 16bit linear, 1 - 12bit nonlinear */
545 c->ach = (quant && freq == 2) ? 2 : 1;
546
547 /* The second stereo channel could appear in IEC 61834 stream only */
548 if (c->ach == 2 && !c->ast[1]) {
549 c->ast[1] = av_new_stream(c->fctx, 0);
550 if (c->ast[1]) {
551 c->ast[1]->codec.codec_type = CODEC_TYPE_AUDIO;
552 c->ast[1]->codec.codec_id = CODEC_ID_PCM_S16LE;
553 } else
554 c->ach = 1;
555 }
556 for (i=0; i<c->ach; i++) {
557 c->ast[i]->codec.sample_rate = dv_audio_frequency[freq];
558 c->ast[i]->codec.channels = 2;
559 c->ast[i]->codec.bit_rate = 2 * dv_audio_frequency[freq] * 16;
560 }
561
7458ccbb
RS
562 return (sys->audio_min_samples[freq] + smpls) * 4; /* 2ch, 2bytes */;
563}
564
ddaae6a9 565static int dv_extract_video_info(DVDemuxContext *c, uint8_t* frame)
7458ccbb
RS
566{
567 const DVprofile* sys;
568 const uint8_t* vsc_pack;
ddaae6a9
RS
569 AVCodecContext* avctx;
570 int apt, is16_9;
7458ccbb
RS
571 int size = 0;
572
573 sys = dv_frame_profile(frame);
574 if (sys) {
ddaae6a9
RS
575 avctx = &c->vst->codec;
576
577 avctx->frame_rate = sys->frame_rate;
7458ccbb
RS
578 avctx->frame_rate_base = sys->frame_rate_base;
579 avctx->width = sys->width;
580 avctx->height = sys->height;
581 avctx->pix_fmt = sys->pix_fmt;
ddaae6a9
RS
582
583 vsc_pack = dv_extract_pack(frame, dv_video_control);
584 apt = frame[4] & 0x07;
585 is16_9 = (vsc_pack && (vsc_pack[2] & 0x07) == (apt?0x02:0x07));
586 avctx->sample_aspect_ratio = sys->sar[is16_9];
587
7458ccbb
RS
588 size = sys->frame_size;
589 }
590 return size;
591}
592
593/*
594 * The following 6 functions constitute our interface to the world
595 */
596
597int dv_assemble_frame(DVMuxContext *c, AVStream* st,
598 const uint8_t* data, int data_size, uint8_t** frame)
599{
600 uint8_t pcm[8192];
601 int fsize, reqasize;
602
603 *frame = &c->frame_buf[0];
604 if (c->has_audio && c->has_video) { /* must be a stale frame */
605 dv_format_frame(c, *frame);
606 c->frames++;
607 c->has_audio = c->has_video = 0;
608 }
609
610 if (st->codec.codec_type == CODEC_TYPE_VIDEO) {
611 /* FIXME: we have to have more sensible approach than this one */
612 if (c->has_video)
bc874dae 613 av_log(&st->codec, AV_LOG_ERROR, "Can't process DV frame #%d. Insufficient audio data or severe sync problem.\n", c->frames);
7458ccbb
RS
614
615 dv_inject_video(c, data, *frame);
616 c->has_video = 1;
617 data_size = 0;
618 }
619
620 reqasize = 4 * dv_audio_frame_size(c->sys, c->frames);
621 fsize = fifo_size(&c->audio_data, c->audio_data.rptr);
622 if (st->codec.codec_type == CODEC_TYPE_AUDIO || (c->has_video && fsize >= reqasize)) {
623 if (fsize + data_size >= reqasize && !c->has_audio) {
624 if (fsize >= reqasize) {
625 fifo_read(&c->audio_data, &pcm[0], reqasize, &c->audio_data.rptr);
626 } else {
627 fifo_read(&c->audio_data, &pcm[0], fsize, &c->audio_data.rptr);
628 memcpy(&pcm[fsize], &data[0], reqasize - fsize);
629 data += reqasize - fsize;
630 data_size -= reqasize - fsize;
631 }
632 dv_inject_audio(c, &pcm[0], *frame);
633 c->has_audio = 1;
634 }
635
636 /* FIXME: we have to have more sensible approach than this one */
637 if (fifo_size(&c->audio_data, c->audio_data.rptr) + data_size >= 100*AVCODEC_MAX_AUDIO_FRAME_SIZE)
bc874dae 638 av_log(&st->codec, AV_LOG_ERROR, "Can't process DV frame #%d. Insufficient video data or severe sync problem.\n", c->frames);
7458ccbb
RS
639 fifo_write(&c->audio_data, (uint8_t *)data, data_size, &c->audio_data.wptr);
640 }
641
642 return (c->has_audio && c->has_video) ? c->sys->frame_size : 0;
643}
644
645DVMuxContext* dv_init_mux(AVFormatContext* s)
646{
647 DVMuxContext *c;
648 AVStream *vst;
649 AVStream *ast;
650
651 c = av_mallocz(sizeof(DVMuxContext));
652 if (!c)
653 return NULL;
654
655 if (s->nb_streams != 2)
656 goto bail_out;
657
658 /* We have to sort out where audio and where video stream is */
659 if (s->streams[0]->codec.codec_type == CODEC_TYPE_VIDEO &&
660 s->streams[1]->codec.codec_type == CODEC_TYPE_AUDIO) {
661 vst = s->streams[0];
662 ast = s->streams[1];
663 }
664 else if (s->streams[1]->codec.codec_type == CODEC_TYPE_VIDEO &&
665 s->streams[0]->codec.codec_type == CODEC_TYPE_AUDIO) {
666 vst = s->streams[1];
667 ast = s->streams[0];
668 } else
669 goto bail_out;
670
671 /* Some checks -- DV format is very picky about its incoming streams */
672 if (vst->codec.codec_id != CODEC_ID_DVVIDEO ||
673 ast->codec.codec_id != CODEC_ID_PCM_S16LE)
674 goto bail_out;
675 if (ast->codec.sample_rate != 48000 ||
676 ast->codec.channels != 2)
677 goto bail_out;
678
679 c->sys = dv_codec_profile(&vst->codec);
680 if (!c->sys)
681 goto bail_out;
682
683 /* Ok, everything seems to be in working order */
684 c->frames = 0;
685 c->has_audio = c->has_video = 0;
686 c->start_time = time(NULL);
687 c->aspect = 0; /* 4:3 is the default */
5ff85f1d 688 if ((int)(av_q2d(vst->codec.sample_aspect_ratio) * vst->codec.width / vst->codec.height * 10) == 17) /* 16:9 */
7458ccbb
RS
689 c->aspect = 0x07;
690
691 if (fifo_init(&c->audio_data, 100*AVCODEC_MAX_AUDIO_FRAME_SIZE) < 0)
692 goto bail_out;
693
694 dv_format_frame(c, &c->frame_buf[0]);
695
696 return c;
697
698bail_out:
699 av_free(c);
700 return NULL;
701}
702
703void dv_delete_mux(DVMuxContext *c)
704{
705 fifo_free(&c->audio_data);
7458ccbb
RS
706}
707
ddaae6a9 708DVDemuxContext* dv_init_demux(AVFormatContext *s)
7458ccbb
RS
709{
710 DVDemuxContext *c;
711
712 c = av_mallocz(sizeof(DVDemuxContext));
713 if (!c)
714 return NULL;
715
ddaae6a9
RS
716 c->vst = av_new_stream(s, 0);
717 c->ast[0] = av_new_stream(s, 0);
718 if (!c->vst || !c->ast[0])
7458ccbb 719 goto fail;
ddaae6a9
RS
720 c->fctx = s;
721 c->ast[1] = NULL;
722 c->ach = 0;
723 c->audio_pkt[0].size = 0;
724 c->audio_pkt[1].size = 0;
725
7458ccbb
RS
726 c->vst->codec.codec_type = CODEC_TYPE_VIDEO;
727 c->vst->codec.codec_id = CODEC_ID_DVVIDEO;
728 c->vst->codec.bit_rate = 25000000;
729
ddaae6a9
RS
730 c->ast[0]->codec.codec_type = CODEC_TYPE_AUDIO;
731 c->ast[0]->codec.codec_id = CODEC_ID_PCM_S16LE;
732
733 s->ctx_flags |= AVFMTCTX_NOHEADER;
7458ccbb
RS
734
735 return c;
736
737fail:
738 if (c->vst)
739 av_free(c->vst);
ddaae6a9
RS
740 if (c->ast[0])
741 av_free(c->ast[0]);
7458ccbb
RS
742 av_free(c);
743 return NULL;
f20dca40
FB
744}
745
ec820113
FB
746static void __destruct_pkt(struct AVPacket *pkt)
747{
748 pkt->data = NULL; pkt->size = 0;
749 return;
750}
751
7458ccbb 752int dv_get_packet(DVDemuxContext *c, AVPacket *pkt)
f20dca40 753{
7458ccbb 754 int size = -1;
ddaae6a9
RS
755 int i;
756
757 for (i=0; i<c->ach; i++) {
758 if (c->ast[i] && c->audio_pkt[i].size) {
759 *pkt = c->audio_pkt[i];
760 c->audio_pkt[i].size = 0;
761 size = pkt->size;
762 break;
763 }
425ed6e2 764 }
7458ccbb
RS
765
766 return size;
767}
768
769int dv_produce_packet(DVDemuxContext *c, AVPacket *pkt,
770 uint8_t* buf, int buf_size)
771{
ddaae6a9 772 int size, i;
7458ccbb
RS
773
774 if (buf_size < 4 || buf_size < dv_frame_profile(buf)->frame_size)
775 return -1; /* Broken frame, or not enough data */
776
777 /* Queueing audio packet */
778 /* FIXME: in case of no audio/bad audio we have to do something */
ddaae6a9
RS
779 size = dv_extract_audio_info(c, buf);
780 c->audio_pkt[0].data = c->audio_pkt[1].data = NULL;
781 for (i=0; i<c->ach; i++) {
782 if (av_new_packet(&c->audio_pkt[i], size) < 0)
783 return AVERROR_NOMEM;
784 c->audio_pkt[i].stream_index = c->ast[i]->index;
785 }
786 dv_extract_audio(buf, c->audio_pkt[0].data, c->audio_pkt[1].data);
f20dca40 787
7458ccbb 788 /* Now it's time to return video packet */
ddaae6a9 789 size = dv_extract_video_info(c, buf);
ec820113
FB
790 av_init_packet(pkt);
791 pkt->destruct = __destruct_pkt;
7458ccbb
RS
792 pkt->data = buf;
793 pkt->size = size;
e738cee9 794 pkt->flags |= PKT_FLAG_KEY;
7458ccbb 795 pkt->stream_index = c->vst->id;
ddaae6a9 796
7458ccbb
RS
797 return size;
798}
799
800/************************************************************
801 * Implementation of the easiest DV storage of all -- raw DV.
802 ************************************************************/
803
804typedef struct RawDVContext {
ddaae6a9
RS
805 uint8_t buf[144000];
806 DVDemuxContext* dv_demux;
7458ccbb
RS
807} RawDVContext;
808
809static int dv_read_header(AVFormatContext *s,
810 AVFormatParameters *ap)
811{
812 RawDVContext *c = s->priv_data;
ddaae6a9 813 c->dv_demux = dv_init_demux(s);
7458ccbb
RS
814
815 return c->dv_demux ? 0 : -1;
816}
817
818
819static int dv_read_packet(AVFormatContext *s, AVPacket *pkt)
820{
821 int size;
822 RawDVContext *c = s->priv_data;
823
824 size = dv_get_packet(c->dv_demux, pkt);
825
826 if (size < 0) {
827 if (get_buffer(&s->pb, c->buf, 4) <= 0)
828 return -EIO;
829
830 size = dv_frame_profile(c->buf)->frame_size;
831 if (get_buffer(&s->pb, c->buf + 4, size - 4) <= 0)
832 return -EIO;
833
834 size = dv_produce_packet(c->dv_demux, pkt, c->buf, size);
835 }
836
837 return size;
f20dca40
FB
838}
839
c18a2692 840static int dv_read_close(AVFormatContext *s)
f20dca40 841{
7458ccbb
RS
842 RawDVContext *c = s->priv_data;
843 av_free(c->dv_demux);
f20dca40
FB
844 return 0;
845}
846
7458ccbb 847static int dv_write_header(AVFormatContext *s)
f20dca40 848{
7458ccbb
RS
849 s->priv_data = dv_init_mux(s);
850 if (!s->priv_data) {
bc874dae 851 av_log(s, AV_LOG_ERROR, "Can't initialize DV format!\n"
118e91f3
RS
852 "Make sure that you supply exactly two streams:\n"
853 " video: 25fps or 29.97fps, audio: 2ch/48Khz/PCM\n");
854 return -1;
855 }
f20dca40
FB
856 return 0;
857}
858
7458ccbb
RS
859static int dv_write_packet(struct AVFormatContext *s,
860 int stream_index,
861 const uint8_t *buf, int size, int64_t pts)
f20dca40 862{
7458ccbb
RS
863 uint8_t* frame;
864 int fsize;
118e91f3 865
7458ccbb
RS
866 fsize = dv_assemble_frame((DVMuxContext *)s->priv_data, s->streams[stream_index],
867 buf, size, &frame);
868 if (fsize > 0) {
869 put_buffer(&s->pb, frame, fsize);
118e91f3 870 put_flush_packet(&s->pb);
7458ccbb 871 }
ec26a167 872 return 0;
f20dca40
FB
873}
874
118e91f3
RS
875/*
876 * We might end up with some extra A/V data without matching counterpart.
877 * E.g. video data without enough audio to write the complete frame.
878 * Currently we simply drop the last frame. I don't know whether this
879 * is the best strategy of all
880 */
7458ccbb 881static int dv_write_trailer(struct AVFormatContext *s)
f20dca40 882{
7458ccbb 883 dv_delete_mux((DVMuxContext *)s->priv_data);
f20dca40
FB
884 return 0;
885}
886
118e91f3
RS
887static AVInputFormat dv_iformat = {
888 "dv",
889 "DV video format",
7458ccbb 890 sizeof(RawDVContext),
118e91f3
RS
891 NULL,
892 dv_read_header,
893 dv_read_packet,
894 dv_read_close,
895 .extensions = "dv",
896};
897
7458ccbb 898static AVOutputFormat dv_oformat = {
f20dca40
FB
899 "dv",
900 "DV video format",
901 NULL,
902 "dv",
118e91f3
RS
903 sizeof(DVMuxContext),
904 CODEC_ID_PCM_S16LE,
f20dca40 905 CODEC_ID_DVVIDEO,
f20dca40
FB
906 dv_write_header,
907 dv_write_packet,
908 dv_write_trailer,
909};
f20dca40
FB
910
911int dv_init(void)
912{
913 av_register_input_format(&dv_iformat);
3e2937be 914 av_register_output_format(&dv_oformat);
f20dca40
FB
915 return 0;
916}