uint64_t abytes;
};
-struct DVMuxContext {
- const DVprofile* sys; /* Current DV profile. E.g.: 525/60, 625/50 */
- int n_ast; /* Number of stereo audio streams (up to 2) */
- AVStream *ast[2]; /* Stereo audio streams */
- FifoBuffer audio_data[2]; /* Fifo for storing excessive amounts of PCM */
- int frames; /* Number of a current frame */
- time_t start_time; /* Start time of recording */
- int has_audio; /* frame under contruction has audio */
- int has_video; /* frame under contruction has video */
- uint8_t frame_buf[DV_MAX_FRAME_SIZE]; /* frame under contruction */
-};
-
-static const int dv_aaux_packs_dist[12][9] = {
- { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
- { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
- { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
- { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
- { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
- { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
- { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
- { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
- { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
- { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
- { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
- { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
-};
-
static inline uint16_t dv_audio_12to16(uint16_t sample)
{
uint16_t shift, result;
return result;
}
-static int dv_audio_frame_size(const DVprofile* sys, int frame)
-{
- return sys->audio_samples_dist[frame % (sizeof(sys->audio_samples_dist)/
- sizeof(sys->audio_samples_dist[0]))];
-}
-
-static int dv_write_pack(enum dv_pack_type pack_id, DVMuxContext *c, uint8_t* buf)
-{
- struct tm tc;
- time_t ct;
- int ltc_frame;
-
- /* Its hard to tell what SMPTE requires w.r.t. APT, but Quicktime needs it.
- * We set it based on pix_fmt value but it really should be per DV profile */
- int apt = (c->sys->pix_fmt == PIX_FMT_YUV422P ? 1 : 0);
-
- buf[0] = (uint8_t)pack_id;
- switch (pack_id) {
- case dv_timecode:
- ct = (time_t)(c->frames / ((float)c->sys->frame_rate /
- (float)c->sys->frame_rate_base));
- brktimegm(ct, &tc);
- /*
- * LTC drop-frame frame counter drops two frames (0 and 1) every
- * minute, unless it is exactly divisible by 10
- */
- ltc_frame = (c->frames + 2*ct/60 - 2*ct/600) % c->sys->ltc_divisor;
- buf[1] = (0 << 7) | /* Color fame: 0 - unsync; 1 - sync mode */
- (1 << 6) | /* Drop frame timecode: 0 - nondrop; 1 - drop */
- ((ltc_frame / 10) << 4) | /* Tens of frames */
- (ltc_frame % 10); /* Units of frames */
- buf[2] = (1 << 7) | /* Biphase mark polarity correction: 0 - even; 1 - odd */
- ((tc.tm_sec / 10) << 4) | /* Tens of seconds */
- (tc.tm_sec % 10); /* Units of seconds */
- buf[3] = (1 << 7) | /* Binary group flag BGF0 */
- ((tc.tm_min / 10) << 4) | /* Tens of minutes */
- (tc.tm_min % 10); /* Units of minutes */
- buf[4] = (1 << 7) | /* Binary group flag BGF2 */
- (1 << 6) | /* Binary group flag BGF1 */
- ((tc.tm_hour / 10) << 4) | /* Tens of hours */
- (tc.tm_hour % 10); /* Units of hours */
- break;
- case dv_audio_source: /* AAUX source pack */
- buf[1] = (0 << 7) | /* locked mode */
- (1 << 6) | /* reserved -- always 1 */
- (dv_audio_frame_size(c->sys, c->frames) -
- c->sys->audio_min_samples[0]);
- /* # of samples */
- buf[2] = (0 << 7) | /* multi-stereo */
- (0 << 5) | /* #of audio channels per block: 0 -- 1 channel */
- (0 << 4) | /* pair bit: 0 -- one pair of channels */
- 0; /* audio mode */
- buf[3] = (1 << 7) | /* res */
- (1 << 6) | /* multi-language flag */
- (c->sys->dsf << 5) | /* system: 60fields/50fields */
- (apt << 1);/* definition: 0 -- 25Mbps, 2 -- 50Mbps */
- buf[4] = (1 << 7) | /* emphasis: 1 -- off */
- (0 << 6) | /* emphasis time constant: 0 -- reserved */
- (0 << 3) | /* frequency: 0 -- 48Khz, 1 -- 44,1Khz, 2 -- 32Khz */
- 0; /* quantization: 0 -- 16bit linear, 1 -- 12bit nonlinear */
- break;
- case dv_audio_control:
- buf[1] = (0 << 6) | /* copy protection: 0 -- unrestricted */
- (1 << 4) | /* input source: 1 -- digital input */
- (3 << 2) | /* compression: 3 -- no information */
- 0; /* misc. info/SMPTE emphasis off */
- buf[2] = (1 << 7) | /* recording start point: 1 -- no */
- (1 << 6) | /* recording end point: 1 -- no */
- (1 << 3) | /* recording mode: 1 -- original */
- 7;
- buf[3] = (1 << 7) | /* direction: 1 -- forward */
- 0x20; /* speed */
- buf[4] = (1 << 7) | /* reserved -- always 1 */
- 0x7f; /* genre category */
- break;
- case dv_audio_recdate:
- case dv_video_recdate: /* VAUX recording date */
- ct = c->start_time + (time_t)(c->frames /
- ((float)c->sys->frame_rate / (float)c->sys->frame_rate_base));
- brktimegm(ct, &tc);
- buf[1] = 0xff; /* ds, tm, tens of time zone, units of time zone */
- /* 0xff is very likely to be "unknown" */
- buf[2] = (3 << 6) | /* reserved -- always 1 */
- ((tc.tm_mday / 10) << 4) | /* Tens of day */
- (tc.tm_mday % 10); /* Units of day */
- buf[3] = /* we set high 4 bits to 0, shouldn't we set them to week? */
- ((tc.tm_mon / 10) << 4) | /* Tens of month */
- (tc.tm_mon % 10); /* Units of month */
- buf[4] = (((tc.tm_year % 100) / 10) << 4) | /* Tens of year */
- (tc.tm_year % 10); /* Units of year */
- break;
- case dv_audio_rectime: /* AAUX recording time */
- case dv_video_rectime: /* VAUX recording time */
- ct = c->start_time + (time_t)(c->frames /
- ((float)c->sys->frame_rate / (float)c->sys->frame_rate_base));
- brktimegm(ct, &tc);
- buf[1] = (3 << 6) | /* reserved -- always 1 */
- 0x3f; /* tens of frame, units of frame: 0x3f - "unknown" ? */
- buf[2] = (1 << 7) | /* reserved -- always 1 */
- ((tc.tm_sec / 10) << 4) | /* Tens of seconds */
- (tc.tm_sec % 10); /* Units of seconds */
- buf[3] = (1 << 7) | /* reserved -- always 1 */
- ((tc.tm_min / 10) << 4) | /* Tens of minutes */
- (tc.tm_min % 10); /* Units of minutes */
- buf[4] = (3 << 6) | /* reserved -- always 1 */
- ((tc.tm_hour / 10) << 4) | /* Tens of hours */
- (tc.tm_hour % 10); /* Units of hours */
- break;
- default:
- buf[1] = buf[2] = buf[3] = buf[4] = 0xff;
- }
- return 5;
-}
-
-static void dv_inject_audio(DVMuxContext *c, int channel, uint8_t* frame_ptr)
-{
- int i, j, d, of, size;
- size = 4 * dv_audio_frame_size(c->sys, c->frames);
- frame_ptr += channel * c->sys->difseg_size * 150 * 80;
- for (i = 0; i < c->sys->difseg_size; i++) {
- frame_ptr += 6 * 80; /* skip DIF segment header */
- for (j = 0; j < 9; j++) {
- dv_write_pack(dv_aaux_packs_dist[i][j], c, &frame_ptr[3]);
- for (d = 8; d < 80; d+=2) {
- of = c->sys->audio_shuffle[i][j] + (d - 8)/2 * c->sys->audio_stride;
- if (of*2 >= size)
- continue;
-
- frame_ptr[d] = fifo_peek(&c->audio_data[channel], of*2+1); // FIXME: may be we have to admit
- frame_ptr[d+1] = fifo_peek(&c->audio_data[channel], of*2); // that DV is a big endian PCM
- }
- frame_ptr += 16 * 80; /* 15 Video DIFs + 1 Audio DIF */
- }
- }
-}
-
-static void dv_inject_metadata(DVMuxContext *c, uint8_t* frame)
-{
- int j, k;
- uint8_t* buf;
-
- for (buf = frame; buf < frame + c->sys->frame_size; buf += 150 * 80) {
- /* DV subcode: 2nd and 3d DIFs */
- for (j = 80; j < 80 * 3; j += 80) {
- for (k = 6; k < 6 * 8; k += 8)
- dv_write_pack(dv_timecode, c, &buf[j+k]);
-
- if (((long)(buf-frame)/(c->sys->frame_size/(c->sys->difseg_size*c->sys->n_difchan))%c->sys->difseg_size) > 5) { /* FIXME: is this really needed ? */
- dv_write_pack(dv_video_recdate, c, &buf[j+14]);
- dv_write_pack(dv_video_rectime, c, &buf[j+22]);
- dv_write_pack(dv_video_recdate, c, &buf[j+38]);
- dv_write_pack(dv_video_rectime, c, &buf[j+46]);
- }
- }
-
- /* DV VAUX: 4th, 5th and 6th 3DIFs */
- for (j = 80*3 + 3; j < 80*6; j += 80) {
- dv_write_pack(dv_video_recdate, c, &buf[j+5*2]);
- dv_write_pack(dv_video_rectime, c, &buf[j+5*3]);
- dv_write_pack(dv_video_recdate, c, &buf[j+5*11]);
- dv_write_pack(dv_video_rectime, c, &buf[j+5*12]);
- }
- }
-}
-
/*
* This is the dumbest implementation of all -- it simply looks at
* a fixed offset and if pack isn't there -- fails. We might want
}
/*
- * The following 6 functions constitute our interface to the world
+ * The following 3 functions constitute our interface to the world
*/
-int dv_assemble_frame(DVMuxContext *c, AVStream* st,
- const uint8_t* data, int data_size, uint8_t** frame)
-{
- int i, reqasize;
-
- *frame = &c->frame_buf[0];
- reqasize = 4 * dv_audio_frame_size(c->sys, c->frames);
-
- switch (st->codec->codec_type) {
- case CODEC_TYPE_VIDEO:
- /* FIXME: we have to have more sensible approach than this one */
- if (c->has_video)
- av_log(st->codec, AV_LOG_ERROR, "Can't process DV frame #%d. Insufficient audio data or severe sync problem.\n", c->frames);
-
- memcpy(*frame, data, c->sys->frame_size);
- c->has_video = 1;
- break;
- case CODEC_TYPE_AUDIO:
- for (i = 0; i < c->n_ast && st != c->ast[i]; i++);
-
- /* FIXME: we have to have more sensible approach than this one */
- if (fifo_size(&c->audio_data[i], c->audio_data[i].rptr) + data_size >= 100*AVCODEC_MAX_AUDIO_FRAME_SIZE)
- av_log(st->codec, AV_LOG_ERROR, "Can't process DV frame #%d. Insufficient video data or severe sync problem.\n", c->frames);
- fifo_write(&c->audio_data[i], data, data_size, &c->audio_data[i].wptr);
-
- /* Lets see if we've got enough audio for one DV frame */
- c->has_audio |= ((reqasize <= fifo_size(&c->audio_data[i], c->audio_data[i].rptr)) << i);
-
- break;
- default:
- break;
- }
-
- /* Lets see if we have enough data to construct one DV frame */
- if (c->has_video == 1 && c->has_audio + 1 == 1<<c->n_ast) {
- dv_inject_metadata(c, *frame);
- for (i=0; i<c->n_ast; i++) {
- dv_inject_audio(c, i, *frame);
- fifo_drain(&c->audio_data[i], reqasize);
- }
-
- c->has_video = 0;
- c->has_audio = 0;
- c->frames++;
-
- return c->sys->frame_size;
- }
-
- return 0;
-}
-
-DVMuxContext* dv_init_mux(AVFormatContext* s)
-{
- DVMuxContext *c;
- AVStream *vst = NULL;
- int i;
-
- /* we support at most 1 video and 2 audio streams */
- if (s->nb_streams > 3)
- return NULL;
-
- c = av_mallocz(sizeof(DVMuxContext));
- if (!c)
- return NULL;
-
- c->n_ast = 0;
- c->ast[0] = c->ast[1] = NULL;
-
- /* We have to sort out where audio and where video stream is */
- for (i=0; i<s->nb_streams; i++) {
- switch (s->streams[i]->codec->codec_type) {
- case CODEC_TYPE_VIDEO:
- vst = s->streams[i];
- break;
- case CODEC_TYPE_AUDIO:
- c->ast[c->n_ast++] = s->streams[i];
- break;
- default:
- goto bail_out;
- }
- }
-
- /* Some checks -- DV format is very picky about its incoming streams */
- if (!vst || vst->codec->codec_id != CODEC_ID_DVVIDEO)
- goto bail_out;
- for (i=0; i<c->n_ast; i++) {
- if (c->ast[i] && (c->ast[i]->codec->codec_id != CODEC_ID_PCM_S16LE ||
- c->ast[i]->codec->sample_rate != 48000 ||
- c->ast[i]->codec->channels != 2))
- goto bail_out;
- }
- c->sys = dv_codec_profile(vst->codec);
- if (!c->sys)
- goto bail_out;
-
- if((c->n_ast > 1) && (c->sys->n_difchan < 2)) {
- /* only 1 stereo pair is allowed in 25Mbps mode */
- goto bail_out;
- }
-
- /* Ok, everything seems to be in working order */
- c->frames = 0;
- c->has_audio = 0;
- c->has_video = 0;
- c->start_time = (time_t)s->timestamp;
-
- for (i=0; i<c->n_ast; i++) {
- if (c->ast[i] && fifo_init(&c->audio_data[i], 100*AVCODEC_MAX_AUDIO_FRAME_SIZE) < 0) {
- while (i>0) {
- i--;
- fifo_free(&c->audio_data[i]);
- }
- goto bail_out;
- }
- }
-
- return c;
-
-bail_out:
- av_free(c);
- return NULL;
-}
-
-void dv_delete_mux(DVMuxContext *c)
-{
- int i;
- for (i=0; i < c->n_ast; i++)
- fifo_free(&c->audio_data[i]);
-}
-
DVDemuxContext* dv_init_demux(AVFormatContext *s)
{
DVDemuxContext *c;
return 0;
}
-#ifdef CONFIG_MUXERS
-static int dv_write_header(AVFormatContext *s)
-{
- s->priv_data = dv_init_mux(s);
- if (!s->priv_data) {
- av_log(s, AV_LOG_ERROR, "Can't initialize DV format!\n"
- "Make sure that you supply exactly two streams:\n"
- " video: 25fps or 29.97fps, audio: 2ch/48Khz/PCM\n"
- " (50Mbps allows an optional second audio stream)\n");
- return -1;
- }
- return 0;
-}
-
-static int dv_write_packet(struct AVFormatContext *s, AVPacket *pkt)
-{
- uint8_t* frame;
- int fsize;
-
- fsize = dv_assemble_frame((DVMuxContext *)s->priv_data, s->streams[pkt->stream_index],
- pkt->data, pkt->size, &frame);
- if (fsize > 0) {
- put_buffer(&s->pb, frame, fsize);
- put_flush_packet(&s->pb);
- }
- return 0;
-}
-
-/*
- * We might end up with some extra A/V data without matching counterpart.
- * E.g. video data without enough audio to write the complete frame.
- * Currently we simply drop the last frame. I don't know whether this
- * is the best strategy of all
- */
-static int dv_write_trailer(struct AVFormatContext *s)
-{
- dv_delete_mux((DVMuxContext *)s->priv_data);
- return 0;
-}
-#endif /* CONFIG_MUXERS */
-
#ifdef CONFIG_DV_DEMUXER
AVInputFormat dv_demuxer = {
"dv",
.extensions = "dv,dif",
};
#endif
-#ifdef CONFIG_DV_MUXER
-AVOutputFormat dv_muxer = {
- "dv",
- "DV video format",
- NULL,
- "dv",
- sizeof(DVMuxContext),
- CODEC_ID_PCM_S16LE,
- CODEC_ID_DVVIDEO,
- dv_write_header,
- dv_write_packet,
- dv_write_trailer,
-};
-#endif
--- /dev/null
+/*
+ * General DV muxer/demuxer
+ * Copyright (c) 2003 Roman Shaposhnik
+ *
+ * Many thanks to Dan Dennedy <dan@dennedy.org> for providing wealth
+ * of DV technical info.
+ *
+ * Raw DV format
+ * Copyright (c) 2002 Fabrice Bellard.
+ *
+ * 50 Mbps (DVCPRO50) support
+ * Copyright (c) 2006 Daniel Maas <dmaas@maasdigital.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#include <time.h>
+#include "avformat.h"
+#include "dvdata.h"
+#include "dv.h"
+
+struct DVMuxContext {
+ const DVprofile* sys; /* Current DV profile. E.g.: 525/60, 625/50 */
+ int n_ast; /* Number of stereo audio streams (up to 2) */
+ AVStream *ast[2]; /* Stereo audio streams */
+ FifoBuffer audio_data[2]; /* Fifo for storing excessive amounts of PCM */
+ int frames; /* Number of a current frame */
+ time_t start_time; /* Start time of recording */
+ int has_audio; /* frame under contruction has audio */
+ int has_video; /* frame under contruction has video */
+ uint8_t frame_buf[DV_MAX_FRAME_SIZE]; /* frame under contruction */
+};
+
+static const int dv_aaux_packs_dist[12][9] = {
+ { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
+ { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
+ { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
+ { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
+ { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
+ { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
+ { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
+ { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
+ { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
+ { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
+ { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
+ { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
+};
+
+static int dv_audio_frame_size(const DVprofile* sys, int frame)
+{
+ return sys->audio_samples_dist[frame % (sizeof(sys->audio_samples_dist)/
+ sizeof(sys->audio_samples_dist[0]))];
+}
+
+static int dv_write_pack(enum dv_pack_type pack_id, DVMuxContext *c, uint8_t* buf)
+{
+ struct tm tc;
+ time_t ct;
+ int ltc_frame;
+
+ /* Its hard to tell what SMPTE requires w.r.t. APT, but Quicktime needs it.
+ * We set it based on pix_fmt value but it really should be per DV profile */
+ int apt = (c->sys->pix_fmt == PIX_FMT_YUV422P ? 1 : 0);
+
+ buf[0] = (uint8_t)pack_id;
+ switch (pack_id) {
+ case dv_timecode:
+ ct = (time_t)(c->frames / ((float)c->sys->frame_rate /
+ (float)c->sys->frame_rate_base));
+ brktimegm(ct, &tc);
+ /*
+ * LTC drop-frame frame counter drops two frames (0 and 1) every
+ * minute, unless it is exactly divisible by 10
+ */
+ ltc_frame = (c->frames + 2*ct/60 - 2*ct/600) % c->sys->ltc_divisor;
+ buf[1] = (0 << 7) | /* Color fame: 0 - unsync; 1 - sync mode */
+ (1 << 6) | /* Drop frame timecode: 0 - nondrop; 1 - drop */
+ ((ltc_frame / 10) << 4) | /* Tens of frames */
+ (ltc_frame % 10); /* Units of frames */
+ buf[2] = (1 << 7) | /* Biphase mark polarity correction: 0 - even; 1 - odd */
+ ((tc.tm_sec / 10) << 4) | /* Tens of seconds */
+ (tc.tm_sec % 10); /* Units of seconds */
+ buf[3] = (1 << 7) | /* Binary group flag BGF0 */
+ ((tc.tm_min / 10) << 4) | /* Tens of minutes */
+ (tc.tm_min % 10); /* Units of minutes */
+ buf[4] = (1 << 7) | /* Binary group flag BGF2 */
+ (1 << 6) | /* Binary group flag BGF1 */
+ ((tc.tm_hour / 10) << 4) | /* Tens of hours */
+ (tc.tm_hour % 10); /* Units of hours */
+ break;
+ case dv_audio_source: /* AAUX source pack */
+ buf[1] = (0 << 7) | /* locked mode */
+ (1 << 6) | /* reserved -- always 1 */
+ (dv_audio_frame_size(c->sys, c->frames) -
+ c->sys->audio_min_samples[0]);
+ /* # of samples */
+ buf[2] = (0 << 7) | /* multi-stereo */
+ (0 << 5) | /* #of audio channels per block: 0 -- 1 channel */
+ (0 << 4) | /* pair bit: 0 -- one pair of channels */
+ 0; /* audio mode */
+ buf[3] = (1 << 7) | /* res */
+ (1 << 6) | /* multi-language flag */
+ (c->sys->dsf << 5) | /* system: 60fields/50fields */
+ (apt << 1);/* definition: 0 -- 25Mbps, 2 -- 50Mbps */
+ buf[4] = (1 << 7) | /* emphasis: 1 -- off */
+ (0 << 6) | /* emphasis time constant: 0 -- reserved */
+ (0 << 3) | /* frequency: 0 -- 48Khz, 1 -- 44,1Khz, 2 -- 32Khz */
+ 0; /* quantization: 0 -- 16bit linear, 1 -- 12bit nonlinear */
+ break;
+ case dv_audio_control:
+ buf[1] = (0 << 6) | /* copy protection: 0 -- unrestricted */
+ (1 << 4) | /* input source: 1 -- digital input */
+ (3 << 2) | /* compression: 3 -- no information */
+ 0; /* misc. info/SMPTE emphasis off */
+ buf[2] = (1 << 7) | /* recording start point: 1 -- no */
+ (1 << 6) | /* recording end point: 1 -- no */
+ (1 << 3) | /* recording mode: 1 -- original */
+ 7;
+ buf[3] = (1 << 7) | /* direction: 1 -- forward */
+ 0x20; /* speed */
+ buf[4] = (1 << 7) | /* reserved -- always 1 */
+ 0x7f; /* genre category */
+ break;
+ case dv_audio_recdate:
+ case dv_video_recdate: /* VAUX recording date */
+ ct = c->start_time + (time_t)(c->frames /
+ ((float)c->sys->frame_rate / (float)c->sys->frame_rate_base));
+ brktimegm(ct, &tc);
+ buf[1] = 0xff; /* ds, tm, tens of time zone, units of time zone */
+ /* 0xff is very likely to be "unknown" */
+ buf[2] = (3 << 6) | /* reserved -- always 1 */
+ ((tc.tm_mday / 10) << 4) | /* Tens of day */
+ (tc.tm_mday % 10); /* Units of day */
+ buf[3] = /* we set high 4 bits to 0, shouldn't we set them to week? */
+ ((tc.tm_mon / 10) << 4) | /* Tens of month */
+ (tc.tm_mon % 10); /* Units of month */
+ buf[4] = (((tc.tm_year % 100) / 10) << 4) | /* Tens of year */
+ (tc.tm_year % 10); /* Units of year */
+ break;
+ case dv_audio_rectime: /* AAUX recording time */
+ case dv_video_rectime: /* VAUX recording time */
+ ct = c->start_time + (time_t)(c->frames /
+ ((float)c->sys->frame_rate / (float)c->sys->frame_rate_base));
+ brktimegm(ct, &tc);
+ buf[1] = (3 << 6) | /* reserved -- always 1 */
+ 0x3f; /* tens of frame, units of frame: 0x3f - "unknown" ? */
+ buf[2] = (1 << 7) | /* reserved -- always 1 */
+ ((tc.tm_sec / 10) << 4) | /* Tens of seconds */
+ (tc.tm_sec % 10); /* Units of seconds */
+ buf[3] = (1 << 7) | /* reserved -- always 1 */
+ ((tc.tm_min / 10) << 4) | /* Tens of minutes */
+ (tc.tm_min % 10); /* Units of minutes */
+ buf[4] = (3 << 6) | /* reserved -- always 1 */
+ ((tc.tm_hour / 10) << 4) | /* Tens of hours */
+ (tc.tm_hour % 10); /* Units of hours */
+ break;
+ default:
+ buf[1] = buf[2] = buf[3] = buf[4] = 0xff;
+ }
+ return 5;
+}
+
+static void dv_inject_audio(DVMuxContext *c, int channel, uint8_t* frame_ptr)
+{
+ int i, j, d, of, size;
+ size = 4 * dv_audio_frame_size(c->sys, c->frames);
+ frame_ptr += channel * c->sys->difseg_size * 150 * 80;
+ for (i = 0; i < c->sys->difseg_size; i++) {
+ frame_ptr += 6 * 80; /* skip DIF segment header */
+ for (j = 0; j < 9; j++) {
+ dv_write_pack(dv_aaux_packs_dist[i][j], c, &frame_ptr[3]);
+ for (d = 8; d < 80; d+=2) {
+ of = c->sys->audio_shuffle[i][j] + (d - 8)/2 * c->sys->audio_stride;
+ if (of*2 >= size)
+ continue;
+
+ frame_ptr[d] = fifo_peek(&c->audio_data[channel], of*2+1); // FIXME: may be we have to admit
+ frame_ptr[d+1] = fifo_peek(&c->audio_data[channel], of*2); // that DV is a big endian PCM
+ }
+ frame_ptr += 16 * 80; /* 15 Video DIFs + 1 Audio DIF */
+ }
+ }
+}
+
+static void dv_inject_metadata(DVMuxContext *c, uint8_t* frame)
+{
+ int j, k;
+ uint8_t* buf;
+
+ for (buf = frame; buf < frame + c->sys->frame_size; buf += 150 * 80) {
+ /* DV subcode: 2nd and 3d DIFs */
+ for (j = 80; j < 80 * 3; j += 80) {
+ for (k = 6; k < 6 * 8; k += 8)
+ dv_write_pack(dv_timecode, c, &buf[j+k]);
+
+ if (((long)(buf-frame)/(c->sys->frame_size/(c->sys->difseg_size*c->sys->n_difchan))%c->sys->difseg_size) > 5) { /* FIXME: is this really needed ? */
+ dv_write_pack(dv_video_recdate, c, &buf[j+14]);
+ dv_write_pack(dv_video_rectime, c, &buf[j+22]);
+ dv_write_pack(dv_video_recdate, c, &buf[j+38]);
+ dv_write_pack(dv_video_rectime, c, &buf[j+46]);
+ }
+ }
+
+ /* DV VAUX: 4th, 5th and 6th 3DIFs */
+ for (j = 80*3 + 3; j < 80*6; j += 80) {
+ dv_write_pack(dv_video_recdate, c, &buf[j+5*2]);
+ dv_write_pack(dv_video_rectime, c, &buf[j+5*3]);
+ dv_write_pack(dv_video_recdate, c, &buf[j+5*11]);
+ dv_write_pack(dv_video_rectime, c, &buf[j+5*12]);
+ }
+ }
+}
+
+/*
+ * The following 3 functions constitute our interface to the world
+ */
+
+int dv_assemble_frame(DVMuxContext *c, AVStream* st,
+ const uint8_t* data, int data_size, uint8_t** frame)
+{
+ int i, reqasize;
+
+ *frame = &c->frame_buf[0];
+ reqasize = 4 * dv_audio_frame_size(c->sys, c->frames);
+
+ switch (st->codec->codec_type) {
+ case CODEC_TYPE_VIDEO:
+ /* FIXME: we have to have more sensible approach than this one */
+ if (c->has_video)
+ av_log(st->codec, AV_LOG_ERROR, "Can't process DV frame #%d. Insufficient audio data or severe sync problem.\n", c->frames);
+
+ memcpy(*frame, data, c->sys->frame_size);
+ c->has_video = 1;
+ break;
+ case CODEC_TYPE_AUDIO:
+ for (i = 0; i < c->n_ast && st != c->ast[i]; i++);
+
+ /* FIXME: we have to have more sensible approach than this one */
+ if (fifo_size(&c->audio_data[i], c->audio_data[i].rptr) + data_size >= 100*AVCODEC_MAX_AUDIO_FRAME_SIZE)
+ av_log(st->codec, AV_LOG_ERROR, "Can't process DV frame #%d. Insufficient video data or severe sync problem.\n", c->frames);
+ fifo_write(&c->audio_data[i], data, data_size, &c->audio_data[i].wptr);
+
+ /* Lets see if we've got enough audio for one DV frame */
+ c->has_audio |= ((reqasize <= fifo_size(&c->audio_data[i], c->audio_data[i].rptr)) << i);
+
+ break;
+ default:
+ break;
+ }
+
+ /* Lets see if we have enough data to construct one DV frame */
+ if (c->has_video == 1 && c->has_audio + 1 == 1<<c->n_ast) {
+ dv_inject_metadata(c, *frame);
+ for (i=0; i<c->n_ast; i++) {
+ dv_inject_audio(c, i, *frame);
+ fifo_drain(&c->audio_data[i], reqasize);
+ }
+
+ c->has_video = 0;
+ c->has_audio = 0;
+ c->frames++;
+
+ return c->sys->frame_size;
+ }
+
+ return 0;
+}
+
+DVMuxContext* dv_init_mux(AVFormatContext* s)
+{
+ DVMuxContext *c;
+ AVStream *vst = NULL;
+ int i;
+
+ /* we support at most 1 video and 2 audio streams */
+ if (s->nb_streams > 3)
+ return NULL;
+
+ c = av_mallocz(sizeof(DVMuxContext));
+ if (!c)
+ return NULL;
+
+ c->n_ast = 0;
+ c->ast[0] = c->ast[1] = NULL;
+
+ /* We have to sort out where audio and where video stream is */
+ for (i=0; i<s->nb_streams; i++) {
+ switch (s->streams[i]->codec->codec_type) {
+ case CODEC_TYPE_VIDEO:
+ vst = s->streams[i];
+ break;
+ case CODEC_TYPE_AUDIO:
+ c->ast[c->n_ast++] = s->streams[i];
+ break;
+ default:
+ goto bail_out;
+ }
+ }
+
+ /* Some checks -- DV format is very picky about its incoming streams */
+ if (!vst || vst->codec->codec_id != CODEC_ID_DVVIDEO)
+ goto bail_out;
+ for (i=0; i<c->n_ast; i++) {
+ if (c->ast[i] && (c->ast[i]->codec->codec_id != CODEC_ID_PCM_S16LE ||
+ c->ast[i]->codec->sample_rate != 48000 ||
+ c->ast[i]->codec->channels != 2))
+ goto bail_out;
+ }
+ c->sys = dv_codec_profile(vst->codec);
+ if (!c->sys)
+ goto bail_out;
+
+ if((c->n_ast > 1) && (c->sys->n_difchan < 2)) {
+ /* only 1 stereo pair is allowed in 25Mbps mode */
+ goto bail_out;
+ }
+
+ /* Ok, everything seems to be in working order */
+ c->frames = 0;
+ c->has_audio = 0;
+ c->has_video = 0;
+ c->start_time = (time_t)s->timestamp;
+
+ for (i=0; i<c->n_ast; i++) {
+ if (c->ast[i] && fifo_init(&c->audio_data[i], 100*AVCODEC_MAX_AUDIO_FRAME_SIZE) < 0) {
+ while (i>0) {
+ i--;
+ fifo_free(&c->audio_data[i]);
+ }
+ goto bail_out;
+ }
+ }
+
+ return c;
+
+bail_out:
+ av_free(c);
+ return NULL;
+}
+
+void dv_delete_mux(DVMuxContext *c)
+{
+ int i;
+ for (i=0; i < c->n_ast; i++)
+ fifo_free(&c->audio_data[i]);
+}
+
+#ifdef CONFIG_MUXERS
+static int dv_write_header(AVFormatContext *s)
+{
+ s->priv_data = dv_init_mux(s);
+ if (!s->priv_data) {
+ av_log(s, AV_LOG_ERROR, "Can't initialize DV format!\n"
+ "Make sure that you supply exactly two streams:\n"
+ " video: 25fps or 29.97fps, audio: 2ch/48Khz/PCM\n"
+ " (50Mbps allows an optional second audio stream)\n");
+ return -1;
+ }
+ return 0;
+}
+
+static int dv_write_packet(struct AVFormatContext *s, AVPacket *pkt)
+{
+ uint8_t* frame;
+ int fsize;
+
+ fsize = dv_assemble_frame((DVMuxContext *)s->priv_data, s->streams[pkt->stream_index],
+ pkt->data, pkt->size, &frame);
+ if (fsize > 0) {
+ put_buffer(&s->pb, frame, fsize);
+ put_flush_packet(&s->pb);
+ }
+ return 0;
+}
+
+/*
+ * We might end up with some extra A/V data without matching counterpart.
+ * E.g. video data without enough audio to write the complete frame.
+ * Currently we simply drop the last frame. I don't know whether this
+ * is the best strategy of all
+ */
+static int dv_write_trailer(struct AVFormatContext *s)
+{
+ dv_delete_mux((DVMuxContext *)s->priv_data);
+ return 0;
+}
+#endif /* CONFIG_MUXERS */
+
+#ifdef CONFIG_DV_MUXER
+AVOutputFormat dv_muxer = {
+ "dv",
+ "DV video format",
+ NULL,
+ "dv",
+ sizeof(DVMuxContext),
+ CODEC_ID_PCM_S16LE,
+ CODEC_ID_DVVIDEO,
+ dv_write_header,
+ dv_write_packet,
+ dv_write_trailer,
+};
+#endif