-/*
- * General DV muxer/demuxer
- * Copyright (c) 2003 Roman Shaposhnick
+/*
+ * 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.
+ * Copyright (c) 2002 Fabrice Bellard
+ *
+ * 50 Mbps (DVCPRO50) and 100 Mbps (DVCPRO HD) support
+ * Copyright (c) 2006 Daniel Maas <dmaas@maasdigital.com>
+ * Funded by BBC Research & Development
+ *
+ * This file is part of FFmpeg.
*
- * This library is free software; you can redistribute it and/or
+ * FFmpeg 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.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * FFmpeg 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * License along with FFmpeg; 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 "libavcodec/dvdata.h"
+#include "libavutil/intreadwrite.h"
#include "dv.h"
struct DVDemuxContext {
- AVFormatContext* fctx;
- AVStream* vst;
- AVStream* ast[2];
- AVPacket audio_pkt[2];
- int ach;
- int frames;
- uint64_t abytes;
-};
-
-struct DVMuxContext {
const DVprofile* sys; /* Current DV profile. E.g.: 525/60, 625/50 */
- uint8_t frame_buf[144000]; /* frame under contruction */
- FifoBuffer audio_data; /* Fifo for storing excessive amounts of PCM */
- int frames; /* Number of a current frame */
- time_t start_time; /* Start time of recording */
- uint8_t aspect; /* Aspect ID 0 - 4:3, 7 - 16:9 */
- int has_audio; /* frame under contruction has audio */
- int has_video; /* frame under contruction has video */
-};
-
-enum dv_section_type {
- dv_sect_header = 0x1f,
- dv_sect_subcode = 0x3f,
- dv_sect_vaux = 0x56,
- dv_sect_audio = 0x76,
- dv_sect_video = 0x96,
-};
-
-enum dv_pack_type {
- dv_header525 = 0x3f, /* see dv_write_pack for important details on */
- dv_header625 = 0xbf, /* these two packs */
- dv_timecode = 0x13,
- dv_audio_source = 0x50,
- dv_audio_control = 0x51,
- dv_audio_recdate = 0x52,
- dv_audio_rectime = 0x53,
- dv_video_source = 0x60,
- dv_video_control = 0x61,
- dv_viedo_recdate = 0x62,
- dv_video_rectime = 0x63,
- dv_unknown_pack = 0xff,
-};
-
-
-
-/*
- * The reason why the following three big ugly looking tables are
- * here is my lack of DV spec IEC 61834. The tables were basically
- * constructed to make code that places packs in SSYB, VAUX and
- * AAUX blocks very simple and table-driven. They conform to the
- * SMPTE 314M and the output of my personal DV camcorder, neither
- * of which is sufficient for a reliable DV stream producing. Thus
- * while code is still in development I'll be gathering input from
- * people with different DV equipment and modifying the tables to
- * accommodate all the quirks. Later on, if possible, some of them
- * will be folded into smaller tables and/or switch-if logic. For
- * now, my only excuse is -- they don't eat up that much of a space.
- */
-
-static const int dv_ssyb_packs_dist[12][6] = {
- { 0x13, 0x13, 0x13, 0x13, 0x13, 0x13 },
- { 0x13, 0x13, 0x13, 0x13, 0x13, 0x13 },
- { 0x13, 0x13, 0x13, 0x13, 0x13, 0x13 },
- { 0x13, 0x13, 0x13, 0x13, 0x13, 0x13 },
- { 0x13, 0x13, 0x13, 0x13, 0x13, 0x13 },
- { 0x13, 0x13, 0x13, 0x13, 0x13, 0x13 },
- { 0x13, 0x62, 0x63, 0x13, 0x62, 0x63 },
- { 0x13, 0x62, 0x63, 0x13, 0x62, 0x63 },
- { 0x13, 0x62, 0x63, 0x13, 0x62, 0x63 },
- { 0x13, 0x62, 0x63, 0x13, 0x62, 0x63 },
- { 0x13, 0x62, 0x63, 0x13, 0x62, 0x63 },
- { 0x13, 0x62, 0x63, 0x13, 0x62, 0x63 },
-};
-
-static const int dv_vaux_packs_dist[12][15] = {
- { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
- { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
- { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
- { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
- { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
- { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
- { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
- { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
- { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
- { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
- { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
- { 0x60, 0x61, 0x62, 0x63, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0x60, 0x61, 0x62, 0x63, 0xff, 0xff },
-};
-
-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 },
+ AVFormatContext* fctx;
+ AVStream* vst;
+ AVStream* ast[4];
+ AVPacket audio_pkt[4];
+ uint8_t audio_buf[4][8192];
+ int ach;
+ int frames;
+ uint64_t abytes;
};
static inline uint16_t dv_audio_12to16(uint16_t sample)
{
uint16_t shift, result;
-
+
sample = (sample < 0x800) ? sample : sample | 0xf000;
- shift = (sample & 0xf00) >> 8;
+ shift = (sample & 0xf00) >> 8;
if (shift < 0x2 || shift > 0xd) {
- result = sample;
+ result = sample;
} else if (shift < 0x8) {
shift--;
- result = (sample - (256 * shift)) << shift;
+ result = (sample - (256 * shift)) << shift;
} else {
- shift = 0xe - shift;
- result = ((sample + ((256 * shift) + 1)) << shift) - 1;
+ shift = 0xe - shift;
+ result = ((sample + ((256 * shift) + 1)) << shift) - 1;
}
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;
-
- buf[0] = (uint8_t)pack_id;
- switch (pack_id) {
- case dv_header525: /* I can't imagine why these two weren't defined as real */
- case dv_header625: /* packs in SMPTE314M -- they definitely look like ones */
- buf[1] = 0xf8 | /* reserved -- always 1 */
- (0 & 0x07); /* APT: Track application ID */
- buf[2] = (0 << 7) | /* TF1: audio data is 0 - valid; 1 - invalid */
- (0x0f << 3) | /* reserved -- always 1 */
- (0 & 0x07); /* AP1: Audio application ID */
- buf[3] = (0 << 7) | /* TF2: video data is 0 - valid; 1 - invalid */
- (0x0f << 3) | /* reserved -- always 1 */
- (0 & 0x07); /* AP2: Video application ID */
- buf[4] = (0 << 7) | /* TF3: subcode(SSYB) is 0 - valid; 1 - invalid */
- (0x0f << 3) | /* reserved -- always 1 */
- (0 & 0x07); /* AP3: Subcode application ID */
- break;
- 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 */
- 0; /* definition: 0 -- SD (525/625) */
- 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_viedo_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;
- case dv_video_source:
- buf[1] = 0xff; /* reserved -- always 1 */
- buf[2] = (1 << 7) | /* B/W: 0 - b/w, 1 - color */
- (1 << 6) | /* following CLF is valid - 0, invalid - 1 */
- (3 << 4) | /* CLF: color frames id (see ITU-R BT.470-4) */
- 0xf; /* reserved -- always 1 */
- buf[3] = (3 << 6) | /* reserved -- always 1 */
- (c->sys->dsf << 5) | /* system: 60fields/50fields */
- 0; /* signal type video compression */
- buf[4] = 0xff; /* VISC: 0xff -- no information */
- break;
- case dv_video_control:
- buf[1] = (0 << 6) | /* Copy generation management (CGMS) 0 -- free */
- 0x3f; /* reserved -- always 1 */
- buf[2] = 0xc8 | /* reserved -- always b11001xxx */
- c->aspect;
- buf[3] = (1 << 7) | /* Frame/field flag 1 -- frame, 0 -- field */
- (1 << 6) | /* First/second field flag 0 -- field 2, 1 -- field 1 */
- (1 << 5) | /* Frame change flag 0 -- same picture as before, 1 -- different */
- (1 << 4) | /* 1 - interlaced, 0 - noninterlaced */
- 0xc; /* reserved -- always b1100 */
- buf[4] = 0xff; /* reserved -- always 1 */
- break;
- default:
- buf[1] = buf[2] = buf[3] = buf[4] = 0xff;
- }
- return 5;
-}
-
-static inline int dv_write_dif_id(enum dv_section_type t, uint8_t seq_num,
- uint8_t dif_num, uint8_t* buf)
-{
- buf[0] = (uint8_t)t; /* Section type */
- buf[1] = (seq_num<<4) | /* DIF seq number 0-9 for 525/60; 0-11 for 625/50 */
- (0 << 3) | /* FSC: for 50Mb/s 0 - first channel; 1 - second */
- 7; /* reserved -- always 1 */
- buf[2] = dif_num; /* DIF block number Video: 0-134, Audio: 0-8 */
- return 3;
-}
-
-static inline int dv_write_ssyb_id(uint8_t syb_num, uint8_t fr, uint8_t* buf)
-{
- if (syb_num == 0 || syb_num == 6) {
- buf[0] = (fr<<7) | /* FR ID 1 - first half of each channel; 0 - second */
- (0<<4) | /* AP3 (Subcode application ID) */
- 0x0f; /* reserved -- always 1 */
- }
- else if (syb_num == 11) {
- buf[0] = (fr<<7) | /* FR ID 1 - first half of each channel; 0 - second */
- 0x7f; /* reserved -- always 1 */
- }
- else {
- buf[0] = (fr<<7) | /* FR ID 1 - first half of each channel; 0 - second */
- (0<<4) | /* APT (Track application ID) */
- 0x0f; /* reserved -- always 1 */
- }
- buf[1] = 0xf0 | /* reserved -- always 1 */
- (syb_num & 0x0f); /* SSYB number 0 - 11 */
- buf[2] = 0xff; /* reserved -- always 1 */
- return 3;
-}
-
-static void dv_format_frame(DVMuxContext *c, uint8_t* buf)
-{
- int i, j, k;
-
- for (i = 0; i < c->sys->difseg_size; i++) {
- memset(buf, 0xff, 80 * 6); /* First 6 DIF blocks are for control data */
-
- /* DV header: 1DIF */
- buf += dv_write_dif_id(dv_sect_header, i, 0, buf);
- buf += dv_write_pack((c->sys->dsf ? dv_header625 : dv_header525), c, buf);
- buf += 72; /* unused bytes */
-
- /* DV subcode: 2DIFs */
- for (j = 0; j < 2; j++) {
- buf += dv_write_dif_id( dv_sect_subcode, i, j, buf);
- for (k = 0; k < 6; k++) {
- buf += dv_write_ssyb_id(k, (i < c->sys->difseg_size/2), buf);
- buf += dv_write_pack(dv_ssyb_packs_dist[i][k], c, buf);
- }
- buf += 29; /* unused bytes */
- }
-
- /* DV VAUX: 3DIFs */
- for (j = 0; j < 3; j++) {
- buf += dv_write_dif_id(dv_sect_vaux, i, j, buf);
- for (k = 0; k < 15 ; k++)
- buf += dv_write_pack(dv_vaux_packs_dist[i][k], c, buf);
- buf += 2; /* unused bytes */
- }
-
- /* DV Audio/Video: 135 Video DIFs + 9 Audio DIFs */
- for (j = 0; j < 135; j++) {
- if (j%15 == 0) {
- buf += dv_write_dif_id(dv_sect_audio, i, j/15, buf);
- buf += dv_write_pack(dv_aaux_packs_dist[i][j/15], c, buf);
- buf += 72; /* shuffled PCM audio */
- }
- buf += dv_write_dif_id(dv_sect_video, i, j, buf);
- buf += 77; /* 1 video macro block: 1 bytes control
- 4 * 14 bytes Y 8x8 data
- 10 bytes Cr 8x8 data
- 10 bytes Cb 8x8 data */
- }
- }
-}
-
-static void dv_inject_audio(DVMuxContext *c, const uint8_t* pcm, uint8_t* frame_ptr)
-{
- int i, j, d, of, size;
- size = 4 * dv_audio_frame_size(c->sys, c->frames);
- for (i = 0; i < c->sys->difseg_size; i++) {
- frame_ptr += 6 * 80; /* skip DIF segment header */
- for (j = 0; j < 9; j++) {
- 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] = pcm[of*2+1]; // FIXME: may be we have to admit
- frame_ptr[d+1] = pcm[of*2]; // that DV is a big endian PCM
- }
- frame_ptr += 16 * 80; /* 15 Video DIFs + 1 Audio DIF */
- }
- }
-}
-
-static void dv_inject_video(DVMuxContext *c, const uint8_t* video_data, uint8_t* frame_ptr)
-{
- int i, j;
- int ptr = 0;
-
- for (i = 0; i < c->sys->difseg_size; i++) {
- ptr += 6 * 80; /* skip DIF segment header */
- for (j = 0; j < 135; j++) {
- if (j%15 == 0)
- ptr += 80; /* skip Audio DIF */
- ptr += 3;
- memcpy(frame_ptr + ptr, video_data + ptr, 77);
- ptr += 77;
- }
- }
-}
-
-/*
+/*
* This is the dumbest implementation of all -- it simply looks at
* a fixed offset and if pack isn't there -- fails. We might want
* to have a fallback mechanism for complete search of missing packs.
static const uint8_t* dv_extract_pack(uint8_t* frame, enum dv_pack_type t)
{
int offs;
-
+
switch (t) {
case dv_audio_source:
- offs = (80*6 + 80*16*3 + 3);
- break;
+ offs = (80*6 + 80*16*3 + 3);
+ break;
case dv_audio_control:
- offs = (80*6 + 80*16*4 + 3);
- break;
+ offs = (80*6 + 80*16*4 + 3);
+ break;
case dv_video_control:
- offs = (80*5 + 48 + 5);
- break;
+ offs = (80*5 + 48 + 5);
+ break;
default:
- return NULL;
- }
+ return NULL;
+ }
- return (frame[offs] == t ? &frame[offs] : NULL);
+ return frame[offs] == t ? &frame[offs] : NULL;
}
-/*
+/*
* There's a couple of assumptions being made here:
* 1. By default we silence erroneous (0x8000/16bit 0x800/12bit) audio samples.
* We can pass them upwards when ffmpeg will be ready to deal with them.
* 3. Audio is always returned as 16bit linear samples: 12bit nonlinear samples
* are converted into 16bit linear ones.
*/
-static int dv_extract_audio(uint8_t* frame, uint8_t* pcm, uint8_t* pcm2)
+static int dv_extract_audio(uint8_t* frame, uint8_t* ppcm[4],
+ const DVprofile *sys)
{
- int size, i, j, d, of, smpls, freq, quant, half_ch;
+ int size, chan, i, j, d, of, smpls, freq, quant, half_ch;
uint16_t lc, rc;
- const DVprofile* sys;
const uint8_t* as_pack;
-
+ uint8_t *pcm, ipcm;
+
as_pack = dv_extract_pack(frame, dv_audio_source);
if (!as_pack) /* No audio ? */
- return 0;
-
- sys = dv_frame_profile(frame);
- smpls = as_pack[1] & 0x3f; /* samples in this frame - min. samples */
- freq = (as_pack[4] >> 3) & 0x07; /* 0 - 48KHz, 1 - 44,1kHz, 2 - 32 kHz */
- quant = as_pack[4] & 0x07; /* 0 - 16bit linear, 1 - 12bit nonlinear */
-
- if (quant > 1)
- return -1; /* Unsupported quantization */
+ return 0;
- size = (sys->audio_min_samples[freq] + smpls) * 4; /* 2ch, 2bytes */
- half_ch = sys->difseg_size/2;
+ smpls = as_pack[1] & 0x3f; /* samples in this frame - min. samples */
+ freq = (as_pack[4] >> 3) & 0x07; /* 0 - 48kHz, 1 - 44,1kHz, 2 - 32kHz */
+ quant = as_pack[4] & 0x07; /* 0 - 16bit linear, 1 - 12bit nonlinear */
- /* for each DIF segment */
- for (i = 0; i < sys->difseg_size; i++) {
- frame += 6 * 80; /* skip DIF segment header */
- if (quant == 1 && i == half_ch) {
- if (!pcm2)
- break;
- else
- pcm = pcm2;
- }
+ if (quant > 1)
+ return -1; /* unsupported quantization */
- for (j = 0; j < 9; j++) {
- for (d = 8; d < 80; d += 2) {
- if (quant == 0) { /* 16bit quantization */
- of = sys->audio_shuffle[i][j] + (d - 8)/2 * sys->audio_stride;
- if (of*2 >= size)
- continue;
-
- pcm[of*2] = frame[d+1]; // FIXME: may be we have to admit
- pcm[of*2+1] = frame[d]; // that DV is a big endian PCM
- if (pcm[of*2+1] == 0x80 && pcm[of*2] == 0x00)
- pcm[of*2+1] = 0;
- } else { /* 12bit quantization */
- lc = ((uint16_t)frame[d] << 4) |
- ((uint16_t)frame[d+2] >> 4);
- rc = ((uint16_t)frame[d+1] << 4) |
- ((uint16_t)frame[d+2] & 0x0f);
- lc = (lc == 0x800 ? 0 : dv_audio_12to16(lc));
- rc = (rc == 0x800 ? 0 : dv_audio_12to16(rc));
-
- of = sys->audio_shuffle[i%half_ch][j] + (d - 8)/3 * sys->audio_stride;
- if (of*2 >= size)
- continue;
-
- pcm[of*2] = lc & 0xff; // FIXME: may be we have to admit
- pcm[of*2+1] = lc >> 8; // that DV is a big endian PCM
- of = sys->audio_shuffle[i%half_ch+half_ch][j] +
- (d - 8)/3 * sys->audio_stride;
- pcm[of*2] = rc & 0xff; // FIXME: may be we have to admit
- pcm[of*2+1] = rc >> 8; // that DV is a big endian PCM
- ++d;
- }
- }
-
- frame += 16 * 80; /* 15 Video DIFs + 1 Audio DIF */
+ size = (sys->audio_min_samples[freq] + smpls) * 4; /* 2ch, 2bytes */
+ half_ch = sys->difseg_size / 2;
+
+ /* We work with 720p frames split in half, thus even frames have
+ * channels 0,1 and odd 2,3. */
+ ipcm = (sys->height == 720 && !(frame[1] & 0x0C)) ? 2 : 0;
+ pcm = ppcm[ipcm++];
+
+ /* for each DIF channel */
+ for (chan = 0; chan < sys->n_difchan; chan++) {
+ /* for each DIF segment */
+ for (i = 0; i < sys->difseg_size; i++) {
+ frame += 6 * 80; /* skip DIF segment header */
+ if (quant == 1 && i == half_ch) {
+ /* next stereo channel (12bit mode only) */
+ pcm = ppcm[ipcm++];
+ if (!pcm)
+ break;
+ }
+
+ /* for each AV sequence */
+ for (j = 0; j < 9; j++) {
+ for (d = 8; d < 80; d += 2) {
+ if (quant == 0) { /* 16bit quantization */
+ of = sys->audio_shuffle[i][j] + (d - 8) / 2 * sys->audio_stride;
+ if (of*2 >= size)
+ continue;
+
+ pcm[of*2] = frame[d+1]; // FIXME: maybe we have to admit
+ pcm[of*2+1] = frame[d]; // that DV is a big-endian PCM
+ if (pcm[of*2+1] == 0x80 && pcm[of*2] == 0x00)
+ pcm[of*2+1] = 0;
+ } else { /* 12bit quantization */
+ lc = ((uint16_t)frame[d] << 4) |
+ ((uint16_t)frame[d+2] >> 4);
+ rc = ((uint16_t)frame[d+1] << 4) |
+ ((uint16_t)frame[d+2] & 0x0f);
+ lc = (lc == 0x800 ? 0 : dv_audio_12to16(lc));
+ rc = (rc == 0x800 ? 0 : dv_audio_12to16(rc));
+
+ of = sys->audio_shuffle[i%half_ch][j] + (d - 8) / 3 * sys->audio_stride;
+ if (of*2 >= size)
+ continue;
+
+ pcm[of*2] = lc & 0xff; // FIXME: maybe we have to admit
+ pcm[of*2+1] = lc >> 8; // that DV is a big-endian PCM
+ of = sys->audio_shuffle[i%half_ch+half_ch][j] +
+ (d - 8) / 3 * sys->audio_stride;
+ pcm[of*2] = rc & 0xff; // FIXME: maybe we have to admit
+ pcm[of*2+1] = rc >> 8; // that DV is a big-endian PCM
+ ++d;
+ }
+ }
+
+ frame += 16 * 80; /* 15 Video DIFs + 1 Audio DIF */
+ }
}
+
+ /* next stereo channel (50Mbps and 100Mbps only) */
+ pcm = ppcm[ipcm++];
+ if (!pcm)
+ break;
}
return size;
static int dv_extract_audio_info(DVDemuxContext* c, uint8_t* frame)
{
const uint8_t* as_pack;
- const DVprofile* sys;
- int freq, smpls, quant, i;
+ int freq, stype, smpls, quant, i, ach;
- sys = dv_frame_profile(frame);
as_pack = dv_extract_pack(frame, dv_audio_source);
- if (!as_pack || !sys) { /* No audio ? */
+ if (!as_pack || !c->sys) { /* No audio ? */
c->ach = 0;
- return -1;
+ return 0;
}
-
- smpls = as_pack[1] & 0x3f; /* samples in this frame - min. samples */
- freq = (as_pack[4] >> 3) & 0x07; /* 0 - 48KHz, 1 - 44,1kHz, 2 - 32 kHz */
- quant = as_pack[4] & 0x07; /* 0 - 16bit linear, 1 - 12bit nonlinear */
- c->ach = (quant && freq == 2) ? 2 : 1;
-
- /* The second stereo channel could appear in IEC 61834 stream only */
- if (c->ach == 2 && !c->ast[1]) {
- c->ast[1] = av_new_stream(c->fctx, 0);
- if (c->ast[1]) {
- av_set_pts_info(c->ast[1], 64, 1, 30000);
- c->ast[1]->codec.codec_type = CODEC_TYPE_AUDIO;
- c->ast[1]->codec.codec_id = CODEC_ID_PCM_S16LE;
- } else
- c->ach = 1;
- }
- for (i=0; i<c->ach; i++) {
- c->ast[i]->codec.sample_rate = dv_audio_frequency[freq];
- c->ast[i]->codec.channels = 2;
- c->ast[i]->codec.bit_rate = 2 * dv_audio_frequency[freq] * 16;
+
+ smpls = as_pack[1] & 0x3f; /* samples in this frame - min. samples */
+ freq = (as_pack[4] >> 3) & 0x07; /* 0 - 48kHz, 1 - 44,1kHz, 2 - 32kHz */
+ stype = (as_pack[3] & 0x1f); /* 0 - 2CH, 2 - 4CH, 3 - 8CH */
+ quant = as_pack[4] & 0x07; /* 0 - 16bit linear, 1 - 12bit nonlinear */
+
+ /* note: ach counts PAIRS of channels (i.e. stereo channels) */
+ ach = ((int[4]){ 1, 0, 2, 4})[stype];
+ if (ach == 1 && quant && freq == 2)
+ ach = 2;
+
+ /* Dynamic handling of the audio streams in DV */
+ for (i = 0; i < ach; i++) {
+ if (!c->ast[i]) {
+ c->ast[i] = av_new_stream(c->fctx, 0);
+ if (!c->ast[i])
+ break;
+ av_set_pts_info(c->ast[i], 64, 1, 30000);
+ c->ast[i]->codec->codec_type = CODEC_TYPE_AUDIO;
+ c->ast[i]->codec->codec_id = CODEC_ID_PCM_S16LE;
+
+ av_init_packet(&c->audio_pkt[i]);
+ c->audio_pkt[i].size = 0;
+ c->audio_pkt[i].data = c->audio_buf[i];
+ c->audio_pkt[i].stream_index = c->ast[i]->index;
+ c->audio_pkt[i].flags |= PKT_FLAG_KEY;
+ }
+ c->ast[i]->codec->sample_rate = dv_audio_frequency[freq];
+ c->ast[i]->codec->channels = 2;
+ c->ast[i]->codec->bit_rate = 2 * dv_audio_frequency[freq] * 16;
+ c->ast[i]->start_time = 0;
}
-
- return (sys->audio_min_samples[freq] + smpls) * 4; /* 2ch, 2bytes */;
+ c->ach = i;
+
+ return (c->sys->audio_min_samples[freq] + smpls) * 4; /* 2ch, 2bytes */;
}
static int dv_extract_video_info(DVDemuxContext *c, uint8_t* frame)
{
- const DVprofile* sys;
const uint8_t* vsc_pack;
AVCodecContext* avctx;
int apt, is16_9;
int size = 0;
-
- sys = dv_frame_profile(frame);
- if (sys) {
- avctx = &c->vst->codec;
-
- avctx->frame_rate = sys->frame_rate;
- avctx->frame_rate_base = sys->frame_rate_base;
- avctx->width = sys->width;
- avctx->height = sys->height;
- avctx->pix_fmt = sys->pix_fmt;
-
- /* finding out SAR is a little bit messy */
- vsc_pack = dv_extract_pack(frame, dv_video_control);
- apt = frame[4] & 0x07;
- is16_9 = (vsc_pack && ((vsc_pack[2] & 0x07) == 0x02 ||
- (!apt && (vsc_pack[2] & 0x07) == 0x07)));
- avctx->sample_aspect_ratio = sys->sar[is16_9];
-
- size = sys->frame_size;
- }
- return size;
-}
-/*
- * The following 6 functions constitute our interface to the world
- */
+ if (c->sys) {
+ avctx = c->vst->codec;
-int dv_assemble_frame(DVMuxContext *c, AVStream* st,
- const uint8_t* data, int data_size, uint8_t** frame)
-{
- uint8_t pcm[8192];
- int fsize, reqasize;
-
- *frame = &c->frame_buf[0];
- if (c->has_audio && c->has_video) { /* must be a stale frame */
- dv_format_frame(c, *frame);
- c->frames++;
- c->has_audio = c->has_video = 0;
- }
-
- if (st->codec.codec_type == 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);
-
- dv_inject_video(c, data, *frame);
- c->has_video = 1;
- data_size = 0;
- }
-
- reqasize = 4 * dv_audio_frame_size(c->sys, c->frames);
- fsize = fifo_size(&c->audio_data, c->audio_data.rptr);
- if (st->codec.codec_type == CODEC_TYPE_AUDIO || (c->has_video && fsize >= reqasize)) {
- if (fsize + data_size >= reqasize && !c->has_audio) {
- if (fsize >= reqasize) {
- fifo_read(&c->audio_data, &pcm[0], reqasize, &c->audio_data.rptr);
- } else {
- fifo_read(&c->audio_data, &pcm[0], fsize, &c->audio_data.rptr);
- memcpy(&pcm[fsize], &data[0], reqasize - fsize);
- data += reqasize - fsize;
- data_size -= reqasize - fsize;
- }
- dv_inject_audio(c, &pcm[0], *frame);
- c->has_audio = 1;
- }
-
- /* FIXME: we have to have more sensible approach than this one */
- if (fifo_size(&c->audio_data, c->audio_data.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, (uint8_t *)data, data_size, &c->audio_data.wptr);
- }
-
- return (c->has_audio && c->has_video) ? c->sys->frame_size : 0;
-}
-
-DVMuxContext* dv_init_mux(AVFormatContext* s)
-{
- DVMuxContext *c;
- AVStream *vst;
- AVStream *ast;
-
- c = av_mallocz(sizeof(DVMuxContext));
- if (!c)
- return NULL;
-
- if (s->nb_streams != 2)
- goto bail_out;
-
- /* We have to sort out where audio and where video stream is */
- if (s->streams[0]->codec.codec_type == CODEC_TYPE_VIDEO &&
- s->streams[1]->codec.codec_type == CODEC_TYPE_AUDIO) {
- vst = s->streams[0];
- ast = s->streams[1];
+ av_set_pts_info(c->vst, 64, c->sys->time_base.num,
+ c->sys->time_base.den);
+ avctx->time_base= c->sys->time_base;
+ if (!avctx->width){
+ avctx->width = c->sys->width;
+ avctx->height = c->sys->height;
+ }
+ avctx->pix_fmt = c->sys->pix_fmt;
+
+ /* finding out SAR is a little bit messy */
+ vsc_pack = dv_extract_pack(frame, dv_video_control);
+ apt = frame[4] & 0x07;
+ is16_9 = (vsc_pack && ((vsc_pack[2] & 0x07) == 0x02 ||
+ (!apt && (vsc_pack[2] & 0x07) == 0x07)));
+ c->vst->sample_aspect_ratio = c->sys->sar[is16_9];
+ avctx->bit_rate = av_rescale_q(c->sys->frame_size, (AVRational){8,1},
+ c->sys->time_base);
+ size = c->sys->frame_size;
}
- else if (s->streams[1]->codec.codec_type == CODEC_TYPE_VIDEO &&
- s->streams[0]->codec.codec_type == CODEC_TYPE_AUDIO) {
- vst = s->streams[1];
- ast = s->streams[0];
- } else
- goto bail_out;
-
- /* Some checks -- DV format is very picky about its incoming streams */
- if (vst->codec.codec_id != CODEC_ID_DVVIDEO ||
- ast->codec.codec_id != CODEC_ID_PCM_S16LE)
- goto bail_out;
- if (ast->codec.sample_rate != 48000 ||
- ast->codec.channels != 2)
- goto bail_out;
-
- c->sys = dv_codec_profile(&vst->codec);
- if (!c->sys)
- goto bail_out;
-
- /* Ok, everything seems to be in working order */
- c->frames = 0;
- c->has_audio = c->has_video = 0;
- c->start_time = (time_t)s->timestamp;
- c->aspect = 0; /* 4:3 is the default */
- if ((int)(av_q2d(vst->codec.sample_aspect_ratio) * vst->codec.width / vst->codec.height * 10) == 17) /* 16:9 */
- c->aspect = 0x07;
-
- if (fifo_init(&c->audio_data, 100*AVCODEC_MAX_AUDIO_FRAME_SIZE) < 0)
- goto bail_out;
-
- dv_format_frame(c, &c->frame_buf[0]);
-
- return c;
-
-bail_out:
- av_free(c);
- return NULL;
+ return size;
}
-void dv_delete_mux(DVMuxContext *c)
-{
- fifo_free(&c->audio_data);
-}
+/*
+ * The following 3 functions constitute our interface to the world
+ */
DVDemuxContext* dv_init_demux(AVFormatContext *s)
{
return NULL;
c->vst = av_new_stream(s, 0);
- c->ast[0] = av_new_stream(s, 0);
- if (!c->vst || !c->ast[0])
- goto fail;
- av_set_pts_info(c->vst, 64, 1, 30000);
- av_set_pts_info(c->ast[0], 64, 1, 30000);
+ if (!c->vst) {
+ av_free(c);
+ return NULL;
+ }
+ c->sys = NULL;
c->fctx = s;
- c->ast[1] = NULL;
- c->ach = 0;
+ memset(c->ast, 0, sizeof(c->ast));
+ c->ach = 0;
c->frames = 0;
c->abytes = 0;
- c->audio_pkt[0].size = 0;
- c->audio_pkt[1].size = 0;
-
- c->vst->codec.codec_type = CODEC_TYPE_VIDEO;
- c->vst->codec.codec_id = CODEC_ID_DVVIDEO;
- c->vst->codec.bit_rate = 25000000;
- c->vst->start_time = 0;
-
- c->ast[0]->codec.codec_type = CODEC_TYPE_AUDIO;
- c->ast[0]->codec.codec_id = CODEC_ID_PCM_S16LE;
- c->ast[0]->codec.sample_rate = 48000;
- c->ast[0]->codec.channels = 2;
- c->ast[0]->start_time = 0;
-
- return c;
-
-fail:
- if (c->vst)
- av_free(c->vst);
- if (c->ast[0])
- av_free(c->ast[0]);
- av_free(c);
- return NULL;
-}
-static void __destruct_pkt(struct AVPacket *pkt)
-{
- pkt->data = NULL; pkt->size = 0;
- return;
+ c->vst->codec->codec_type = CODEC_TYPE_VIDEO;
+ c->vst->codec->codec_id = CODEC_ID_DVVIDEO;
+ c->vst->codec->bit_rate = 25000000;
+ c->vst->start_time = 0;
+
+ return c;
}
int dv_get_packet(DVDemuxContext *c, AVPacket *pkt)
int size = -1;
int i;
- for (i=0; i<c->ach; i++) {
+ for (i = 0; i < c->ach; i++) {
if (c->ast[i] && c->audio_pkt[i].size) {
*pkt = c->audio_pkt[i];
- c->audio_pkt[i].size = 0;
- size = pkt->size;
- break;
+ c->audio_pkt[i].size = 0;
+ size = pkt->size;
+ break;
}
}
return size;
}
-int dv_produce_packet(DVDemuxContext *c, AVPacket *pkt,
+int dv_produce_packet(DVDemuxContext *c, AVPacket *pkt,
uint8_t* buf, int buf_size)
{
int size, i;
- const DVprofile* sys = dv_frame_profile(buf);
-
- if (buf_size < 4 || buf_size < sys->frame_size)
- return -1; /* Broken frame, or not enough data */
+ uint8_t *ppcm[4] = {0};
+
+ if (buf_size < DV_PROFILE_BYTES ||
+ !(c->sys = dv_frame_profile(buf)) ||
+ buf_size < c->sys->frame_size) {
+ return -1; /* Broken frame, or not enough data */
+ }
/* Queueing audio packet */
/* FIXME: in case of no audio/bad audio we have to do something */
size = dv_extract_audio_info(c, buf);
- c->audio_pkt[0].data = c->audio_pkt[1].data = NULL;
- for (i=0; i<c->ach; i++) {
- if (av_new_packet(&c->audio_pkt[i], size) < 0)
- return AVERROR_NOMEM;
- c->audio_pkt[i].stream_index = c->ast[i]->index;
- c->audio_pkt[i].pts = c->abytes * 30000*8 / c->ast[i]->codec.bit_rate;
- c->audio_pkt[i].flags |= PKT_FLAG_KEY;
+ for (i = 0; i < c->ach; i++) {
+ c->audio_pkt[i].size = size;
+ c->audio_pkt[i].pts = c->abytes * 30000*8 / c->ast[i]->codec->bit_rate;
+ ppcm[i] = c->audio_buf[i];
}
- dv_extract_audio(buf, c->audio_pkt[0].data, c->audio_pkt[1].data);
+ dv_extract_audio(buf, ppcm, c->sys);
c->abytes += size;
-
+
+ /* We work with 720p frames split in half, thus even frames have
+ * channels 0,1 and odd 2,3. */
+ if (c->sys->height == 720) {
+ if (buf[1] & 0x0C)
+ c->audio_pkt[2].size = c->audio_pkt[3].size = 0;
+ else
+ c->audio_pkt[0].size = c->audio_pkt[1].size = 0;
+ }
+
/* Now it's time to return video packet */
size = dv_extract_video_info(c, buf);
av_init_packet(pkt);
- pkt->destruct = __destruct_pkt;
- pkt->data = buf;
- pkt->size = size;
- pkt->flags |= PKT_FLAG_KEY;
+ pkt->data = buf;
+ pkt->size = size;
+ pkt->flags |= PKT_FLAG_KEY;
pkt->stream_index = c->vst->id;
- pkt->pts = c->frames * sys->frame_rate_base * (30000/sys->frame_rate);
-
+ pkt->pts = c->frames;
+
c->frames++;
return size;
}
-
-int64_t dv_frame_offset(DVDemuxContext *c, int64_t timestamp)
+
+static int64_t dv_frame_offset(AVFormatContext *s, DVDemuxContext *c,
+ int64_t timestamp, int flags)
{
- const DVprofile* sys;
-
// FIXME: sys may be wrong if last dv_read_packet() failed (buffer is junk)
- sys = dv_codec_profile(&c->vst->codec);
+ const DVprofile* sys = dv_codec_profile(c->vst->codec);
+ int64_t offset;
+ int64_t size = url_fsize(s->pb);
+ int64_t max_offset = ((size-1) / sys->frame_size) * sys->frame_size;
- // timestamp was scaled by time_base/AV_BASE_RATE by av_seek_frame()
- int64_t frame_number = av_rescale(sys->frame_rate, timestamp,
- (int64_t) 30000 * sys->frame_rate_base);
+ offset = sys->frame_size * timestamp;
- // offset must be a multiple of frame_size else dv_read_packet() will fail
- int64_t offset = (int64_t) sys->frame_size * frame_number;
+ if (offset > max_offset) offset = max_offset;
+ else if (offset < 0) offset = 0;
return offset;
}
+void dv_offset_reset(DVDemuxContext *c, int64_t frame_offset)
+{
+ c->frames= frame_offset;
+ if (c->ach)
+ c->abytes= av_rescale_q(c->frames, c->sys->time_base,
+ (AVRational){8, c->ast[0]->codec->bit_rate});
+ c->audio_pkt[0].size = c->audio_pkt[1].size = 0;
+ c->audio_pkt[2].size = c->audio_pkt[3].size = 0;
+}
+
/************************************************************
* Implementation of the easiest DV storage of all -- raw DV.
************************************************************/
-
+
typedef struct RawDVContext {
- uint8_t buf[144000];
DVDemuxContext* dv_demux;
+ uint8_t buf[DV_MAX_FRAME_SIZE];
} RawDVContext;
static int dv_read_header(AVFormatContext *s,
AVFormatParameters *ap)
{
+ unsigned state;
RawDVContext *c = s->priv_data;
- const DVprofile* sys;
+
c->dv_demux = dv_init_demux(s);
if (!c->dv_demux)
return -1;
-
- if (get_buffer(&s->pb, c->buf, 4) <= 0 || url_fseek(&s->pb, -4, SEEK_CUR) < 0)
- return AVERROR_IO;
- sys = dv_frame_profile(c->buf);
- s->bit_rate = av_rescale(sys->frame_size * 8, sys->frame_rate, sys->frame_rate_base);
-
+ state = get_be32(s->pb);
+ while ((state & 0xffffff7f) != 0x1f07003f) {
+ if (url_feof(s->pb)) {
+ av_log(s, AV_LOG_ERROR, "Cannot find DV header.\n");
+ return -1;
+ }
+ state = (state << 8) | get_byte(s->pb);
+ }
+ AV_WB32(c->buf, state);
+
+ if (get_buffer(s->pb, c->buf + 4, DV_PROFILE_BYTES - 4) <= 0 ||
+ url_fseek(s->pb, -DV_PROFILE_BYTES, SEEK_CUR) < 0)
+ return AVERROR(EIO);
+
+ c->dv_demux->sys = dv_frame_profile(c->buf);
+ if (!c->dv_demux->sys) {
+ av_log(s, AV_LOG_ERROR, "Can't determine profile of DV input stream.\n");
+ return -1;
+ }
+
+ s->bit_rate = av_rescale_q(c->dv_demux->sys->frame_size, (AVRational){8,1},
+ c->dv_demux->sys->time_base);
+
return 0;
}
static int dv_read_packet(AVFormatContext *s, AVPacket *pkt)
{
int size;
- RawDVContext *c = s->priv_data;
-
+ RawDVContext *c = s->priv_data;
+
size = dv_get_packet(c->dv_demux, pkt);
-
+
if (size < 0) {
- if (get_buffer(&s->pb, c->buf, 4) <= 0)
- return AVERROR_IO;
-
- size = dv_frame_profile(c->buf)->frame_size;
- if (get_buffer(&s->pb, c->buf + 4, size - 4) <= 0)
- return AVERROR_IO;
-
- size = dv_produce_packet(c->dv_demux, pkt, c->buf, size);
- }
-
+ if (!c->dv_demux->sys)
+ return AVERROR(EIO);
+ size = c->dv_demux->sys->frame_size;
+ if (get_buffer(s->pb, c->buf, size) <= 0)
+ return AVERROR(EIO);
+
+ size = dv_produce_packet(c->dv_demux, pkt, c->buf, size);
+ }
+
return size;
}
-static int dv_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp)
+static int dv_read_seek(AVFormatContext *s, int stream_index,
+ int64_t timestamp, int flags)
{
- RawDVContext *c = s->priv_data;
+ RawDVContext *r = s->priv_data;
+ DVDemuxContext *c = r->dv_demux;
+ int64_t offset = dv_frame_offset(s, c, timestamp, flags);
+
+ dv_offset_reset(c, offset / c->sys->frame_size);
- return url_fseek(&s->pb, dv_frame_offset(c->dv_demux, timestamp), SEEK_SET);
+ offset = url_fseek(s->pb, offset, SEEK_SET);
+ return (offset < 0) ? offset : 0;
}
static int dv_read_close(AVFormatContext *s)
return 0;
}
-static int dv_write_header(AVFormatContext *s)
+static int dv_probe(AVProbeData *p)
{
- 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");
- return -1;
- }
- return 0;
-}
+ unsigned state;
+ int i;
-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;
-}
+ if (p->buf_size < 5)
+ return 0;
+
+ state = AV_RB32(p->buf);
+ for (i = 4; i < p->buf_size; i++) {
+ if ((state & 0xffffff7f) == 0x1f07003f)
+ return AVPROBE_SCORE_MAX*3/4; // not max to avoid dv in mov to match
+ state = (state << 8) | p->buf[i];
+ }
-/*
- * 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;
}
-static AVInputFormat dv_iformat = {
+#if CONFIG_DV_DEMUXER
+AVInputFormat dv_demuxer = {
"dv",
- "DV video format",
+ NULL_IF_CONFIG_SMALL("DV video format"),
sizeof(RawDVContext),
- NULL,
+ dv_probe,
dv_read_header,
dv_read_packet,
dv_read_close,
dv_read_seek,
.extensions = "dv,dif",
};
-
-static AVOutputFormat dv_oformat = {
- "dv",
- "DV video format",
- NULL,
- "dv",
- sizeof(DVMuxContext),
- CODEC_ID_PCM_S16LE,
- CODEC_ID_DVVIDEO,
- dv_write_header,
- dv_write_packet,
- dv_write_trailer,
-};
-
-int ff_dv_init(void)
-{
- av_register_input_format(&dv_iformat);
- av_register_output_format(&dv_oformat);
- return 0;
-}
+#endif
projects / frescor / ffmpeg.git / blobdiff