From d4fc91b4498b8bf9310fb21633bbe0b4fbc095c9 Mon Sep 17 00:00:00 2001 From: Panagiotis Issaris Date: Fri, 15 Sep 2006 19:14:24 +0000 Subject: Split the DV demuxer and muxer into separate files (as suggested by Diego Biurrun). Originally committed as revision 6272 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavformat/dvenc.c | 413 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 413 insertions(+) create mode 100644 libavformat/dvenc.c (limited to 'libavformat/dvenc.c') diff --git a/libavformat/dvenc.c b/libavformat/dvenc.c new file mode 100644 index 0000000000..17024fb4b5 --- /dev/null +++ b/libavformat/dvenc.c @@ -0,0 +1,413 @@ +/* + * General DV muxer/demuxer + * Copyright (c) 2003 Roman Shaposhnik + * + * Many thanks to Dan Dennedy for providing wealth + * of DV technical info. + * + * Raw DV format + * Copyright (c) 2002 Fabrice Bellard. + * + * 50 Mbps (DVCPRO50) support + * Copyright (c) 2006 Daniel Maas + * + * 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 +#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<n_ast) { + dv_inject_metadata(c, *frame); + for (i=0; in_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; inb_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; in_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; in_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 -- cgit v1.2.3