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| -rw-r--r-- | libavformat/dvcore.c | 668 | ||||
| -rw-r--r-- | libavformat/dvcore.h | 73 |
2 files changed, 0 insertions, 741 deletions
diff --git a/libavformat/dvcore.c b/libavformat/dvcore.c deleted file mode 100644 index e14f338008..0000000000 --- a/libavformat/dvcore.c +++ /dev/null @@ -1,668 +0,0 @@ -/* - * DV format muxer/demuxer - * Copyright (c) 2003 Roman Shaposhnik - * - * Many thanks to Dan Dennedy <dan@dennedy.org> for providing wealth - * of DV technical info. - * - * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ -#include "avformat.h" -#include "dvcore.h" - -/* - * 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 }, -}; - -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, -}; - -static const uint16_t dv_audio_shuffle525[10][9] = { - { 0, 30, 60, 20, 50, 80, 10, 40, 70 }, /* 1st channel */ - { 6, 36, 66, 26, 56, 86, 16, 46, 76 }, - { 12, 42, 72, 2, 32, 62, 22, 52, 82 }, - { 18, 48, 78, 8, 38, 68, 28, 58, 88 }, - { 24, 54, 84, 14, 44, 74, 4, 34, 64 }, - - { 1, 31, 61, 21, 51, 81, 11, 41, 71 }, /* 2nd channel */ - { 7, 37, 67, 27, 57, 87, 17, 47, 77 }, - { 13, 43, 73, 3, 33, 63, 23, 53, 83 }, - { 19, 49, 79, 9, 39, 69, 29, 59, 89 }, - { 25, 55, 85, 15, 45, 75, 5, 35, 65 }, -}; - -static const uint16_t dv_audio_shuffle625[12][9] = { - { 0, 36, 72, 26, 62, 98, 16, 52, 88}, /* 1st channel */ - { 6, 42, 78, 32, 68, 104, 22, 58, 94}, - { 12, 48, 84, 2, 38, 74, 28, 64, 100}, - { 18, 54, 90, 8, 44, 80, 34, 70, 106}, - { 24, 60, 96, 14, 50, 86, 4, 40, 76}, - { 30, 66, 102, 20, 56, 92, 10, 46, 82}, - - { 1, 37, 73, 27, 63, 99, 17, 53, 89}, /* 2nd channel */ - { 7, 43, 79, 33, 69, 105, 23, 59, 95}, - { 13, 49, 85, 3, 39, 75, 29, 65, 101}, - { 19, 55, 91, 9, 45, 81, 35, 71, 107}, - { 25, 61, 97, 15, 51, 87, 5, 41, 77}, - { 31, 67, 103, 21, 57, 93, 11, 47, 83}, -}; - -static const int dv_audio_frequency[3] = { - 48000, 44100, 32000, -}; - -const DVprofile dv_profiles[2] = { - { .dsf = 0, - .frame_size = 120000, /* 525/60 system (NTSC) */ - .difseg_size = 10, - .frame_rate = 30000, - .ltc_divisor = 30, - .frame_rate_base = 1001, - .height = 480, -/* .video_place = dv_place_411, */ - .audio_stride = 90, - .audio_min_samples = { 1580, 1452, 1053 }, /* for 48, 44.1 and 32Khz */ - .audio_samples_dist = { 1602, 1601, 1602, 1601, 1602 }, - .audio_shuffle = dv_audio_shuffle525, - }, - { .dsf = 1, - .frame_size = 144000, /* 625/50 system (PAL) */ - .difseg_size = 12, - .frame_rate = 25, - .frame_rate_base = 1, - .ltc_divisor = 25, - .height = 576, -/* .video_place = dv_place_420, */ - .audio_stride = 108, - .audio_min_samples = { 1896, 1742, 1264 }, /* for 48, 44.1 and 32Khz */ - .audio_samples_dist = { 1920, 1920, 1920, 1920, 1920 }, - .audio_shuffle = dv_audio_shuffle525, - } -}; - -static inline uint16_t dv_audio_12to16(uint16_t sample) -{ - uint16_t shift, result; - - sample = (sample < 0x800) ? sample : sample | 0xf000; - shift = (sample & 0xf00) >> 8; - - if (shift < 0x2 || shift > 0xd) { - result = sample; - } else if (shift < 0x8) { - shift--; - result = (sample - (256 * shift)) << shift; - } else { - shift = 0xe - shift; - result = ((sample + ((256 * shift) + 1)) << shift) - 1; - } - - return result; -} - -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)); - localtime_r(&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)); - localtime_r(&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); /* 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)); - localtime_r(&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; -} - -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 */ - } - } -} - -void dv_inject_audio(DVMuxContext *c, const uint8_t* pcm, uint8_t* frame_ptr) -{ - int i, j, d, of; - 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; - 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 */ - } - } -} - -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; - } - } -} - -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]))]; -} - -const DVprofile* dv_frame_profile(uint8_t* frame) -{ - return &dv_profiles[!!(frame[3] & 0x80)]; /* Header, DSF flag */ -} - -/* - * 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. - */ -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; - case dv_audio_control: - offs = (80*6 + 80*16*4 + 3); - break; - case dv_video_control: - offs = (80*5 + 48 + 5); - break; - default: - return 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. - * 2. We don't do software emphasis. - * 3. Audio is always returned as 16bit linear samples: 12bit nonlinear samples - * are converted into 16bit linear ones. - */ -int dv_extract_audio(uint8_t* frame, uint8_t* pcm, AVCodecContext* avctx) -{ - int size, i, j, d, of, smpls, freq, quant; - uint16_t lc, rc; - const DVprofile* sys; - const uint8_t* as_pack; - - 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 */ - - avctx->sample_rate = dv_audio_frequency[freq]; - avctx->channels = 2; - avctx->bit_rate = avctx->channels * avctx->sample_rate * 16; - // What about: - // avctx->frame_size = - - size = (sys->audio_min_samples[freq] + smpls) * 4; /* 2ch, 2bytes */ - - /* for each DIF segment */ - for (i = 0; i < sys->difseg_size; i++) { - frame += 6 * 80; /* skip DIF segment header */ - 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; - 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 */ - if (i >= sys->difseg_size/2) - goto out; /* We're not doing 4ch at this time */ - - 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][j] + (d - 8)/3 * sys->audio_stride; - 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+sys->difseg_size/2][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 */ - } - } - -out: - return size; -} - -/* FIXME: The following three functions could be underengineered ;-) */ -void dv_assemble_frame(DVMuxContext *c, const uint8_t* video, const uint8_t* audio, int asize) -{ - uint8_t pcm[8192]; - uint8_t* frame = &c->frame_buf[0]; - int fsize, reqasize; - - 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 (video) { - /* FIXME: we have to have more sensible approach than this one */ - if (c->has_video) - fprintf(stderr, "Can't process DV frame #%d. Insufficient audio data or severe sync problem.\n", c->frames); - - dv_inject_video(c, video, frame); - c->has_video = 1; - } - if (audio) { - reqasize = 4 * dv_audio_frame_size(c->sys, c->frames); - fsize = fifo_size(&c->audio_data, c->audio_data.rptr); - if (fsize + asize >= reqasize) { - 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], &audio[0], reqasize - fsize); - audio += reqasize - fsize; - asize -= 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) + asize >= AVCODEC_MAX_AUDIO_FRAME_SIZE) - fprintf(stderr, "Can't process DV frame #%d. Insufficient video data or severe sync problem.\n", c->frames); - fifo_write(&c->audio_data, (uint8_t *)audio, asize, &c->audio_data.wptr); - } -} - -int dv_core_init(DVMuxContext *c, AVStream *streams[]) -{ - /* We have to sort out where audio and where video stream is */ - if (streams[0]->codec.codec_type == CODEC_TYPE_VIDEO && - streams[1]->codec.codec_type == CODEC_TYPE_AUDIO) { - c->vst = 0; - c->ast = 1; - } - else if (streams[1]->codec.codec_type == CODEC_TYPE_VIDEO && - streams[0]->codec.codec_type == CODEC_TYPE_AUDIO) { - c->vst = 1; - c->ast = 0; - } else - goto bail_out; - - /* Some checks -- DV format is very picky about its incoming streams */ - if (streams[c->vst]->codec.codec_id != CODEC_ID_DVVIDEO || - streams[c->ast]->codec.codec_id != CODEC_ID_PCM_S16LE) - goto bail_out; - if (streams[c->ast]->codec.sample_rate != 48000 || - streams[c->ast]->codec.channels != 2) - goto bail_out; - - if (streams[c->vst]->codec.frame_rate == 25 && - streams[c->vst]->codec.frame_rate_base == 1) { - /* May be we have to pick sys for every frame */ - c->sys = &dv_profiles[1]; - } - else if (streams[c->vst]->codec.frame_rate == 30000 && - streams[c->vst]->codec.frame_rate_base == 1001) { - /* May be we have to pick sys for every frame */ - c->sys = &dv_profiles[0]; - } else - 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(NULL); - c->aspect = 0; /* 4:3 is the default */ - if (streams[c->vst]->codec.aspect_ratio == 16.0 / 9.0) - c->aspect = 0x07; - - if (fifo_init(&c->audio_data, AVCODEC_MAX_AUDIO_FRAME_SIZE) < 0) - goto bail_out; - - dv_format_frame(c, &c->frame_buf[0]); - - return 0; - -bail_out: - return -1; -} - -void dv_core_delete(DVMuxContext *c) -{ - fifo_free(&c->audio_data); -} diff --git a/libavformat/dvcore.h b/libavformat/dvcore.h deleted file mode 100644 index b492cc5995..0000000000 --- a/libavformat/dvcore.h +++ /dev/null @@ -1,73 +0,0 @@ -/* - * DV format muxer/demuxer - * Copyright (c) 2003 Roman Shaposhnik - * - * Many thanks to Dan Dennedy <dan@dennedy.org> for providing wealth - * of DV technical info. - * - * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ -#include <time.h> -#include "avformat.h" - -/* - * DVprofile is used to express the differences between various - * DV flavors. For now it's primarily used for differentiating - * 525/60 and 625/50, but the plans are to use it for various - * DV specs as well (e.g. SMPTE314M vs. IEC 61834). - */ -typedef struct DVprofile { - int dsf; /* value of the dsf in the DV header */ - int frame_size; /* total size of one frame in bytes */ - int difseg_size; /* number of DIF segments */ - int frame_rate; - int frame_rate_base; - int ltc_divisor; /* FPS from the LTS standpoint */ - int height; /* picture height in pixels */ - uint16_t *video_place; /* positions of all DV macro blocks */ - - int audio_stride; /* size of audio_shuffle table */ - int audio_min_samples[3]; /* min ammount of audio samples */ - /* for 48Khz, 44.1Khz and 32Khz */ - int audio_samples_dist[5];/* how many samples are supposed to be */ - /* in each frame in a 5 frames window */ - const uint16_t (*audio_shuffle)[9]; /* PCM shuffling table */ -} DVprofile; - -typedef 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 ast, vst; /* Audio and Video stream indecies */ - int has_audio; /* frame under contruction has audio */ - int has_video; /* frame under contruction has video */ -} DVMuxContext; - -void dv_format_frame(DVMuxContext *, uint8_t*); -void dv_inject_audio(DVMuxContext *, const uint8_t*, uint8_t*); -void dv_inject_video(DVMuxContext *, const uint8_t*, uint8_t*); - -int dv_extract_audio(uint8_t*, uint8_t*, AVCodecContext*); - -int dv_audio_frame_size(const DVprofile*, int); - -void dv_assemble_frame(DVMuxContext *c, const uint8_t*, const uint8_t*, int); -int dv_core_init(DVMuxContext *, AVStream*[]); -void dv_core_delete(DVMuxContext *); - -const DVprofile* dv_frame_profile(uint8_t*); |