2 * RAW encoder and decoder
3 * Copyright (c) 2001 Fabrice Bellard.
4 * Copyright (c) 2005 Alex Beregszaszi
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 static int raw_write_header(struct AVFormatContext *s)
31 static int flac_write_header(struct AVFormatContext *s)
33 static const uint8_t header[8] = {
34 0x66, 0x4C, 0x61, 0x43, 0x80, 0x00, 0x00, 0x22
36 uint8_t *streaminfo = s->streams[0]->codec->extradata;
37 int len = s->streams[0]->codec->extradata_size;
38 if(streaminfo != NULL && len > 0) {
39 put_buffer(&s->pb, header, 8);
40 put_buffer(&s->pb, streaminfo, len);
45 static int raw_write_packet(struct AVFormatContext *s, AVPacket *pkt)
47 put_buffer(&s->pb, pkt->data, pkt->size);
48 put_flush_packet(&s->pb);
52 static int raw_write_trailer(struct AVFormatContext *s)
56 #endif //CONFIG_MUXERS
59 static int raw_read_header(AVFormatContext *s, AVFormatParameters *ap)
64 st = av_new_stream(s, 0);
68 id = s->iformat->value;
69 if (id == CODEC_ID_RAWVIDEO) {
70 st->codec->codec_type = CODEC_TYPE_VIDEO;
72 st->codec->codec_type = CODEC_TYPE_AUDIO;
74 st->codec->codec_id = id;
76 switch(st->codec->codec_type) {
77 case CODEC_TYPE_AUDIO:
78 st->codec->sample_rate = ap->sample_rate;
79 st->codec->channels = ap->channels;
80 av_set_pts_info(st, 64, 1, st->codec->sample_rate);
82 case CODEC_TYPE_VIDEO:
83 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
84 st->codec->width = ap->width;
85 st->codec->height = ap->height;
86 st->codec->pix_fmt = ap->pix_fmt;
87 if(st->codec->pix_fmt == PIX_FMT_NONE)
88 st->codec->pix_fmt= PIX_FMT_YUV420P;
96 #define RAW_PACKET_SIZE 1024
98 static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
101 // AVStream *st = s->streams[0];
103 size= RAW_PACKET_SIZE;
105 ret= av_get_packet(&s->pb, pkt, size);
107 pkt->stream_index = 0;
111 /* note: we need to modify the packet size here to handle the last
117 static int raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
121 size = RAW_PACKET_SIZE;
123 if (av_new_packet(pkt, size) < 0)
126 pkt->pos= url_ftell(&s->pb);
127 pkt->stream_index = 0;
128 ret = get_partial_buffer(&s->pb, pkt->data, size);
137 // http://www.artificis.hu/files/texts/ingenient.txt
138 static int ingenient_read_packet(AVFormatContext *s, AVPacket *pkt)
140 int ret, size, w, h, unk1, unk2;
142 if (get_le32(&s->pb) != MKTAG('M', 'J', 'P', 'G'))
143 return AVERROR_IO; // FIXME
145 size = get_le32(&s->pb);
147 w = get_le16(&s->pb);
148 h = get_le16(&s->pb);
150 url_fskip(&s->pb, 8); // zero + size (padded?)
151 url_fskip(&s->pb, 2);
152 unk1 = get_le16(&s->pb);
153 unk2 = get_le16(&s->pb);
154 url_fskip(&s->pb, 22); // ascii timestamp
156 av_log(NULL, AV_LOG_DEBUG, "Ingenient packet: size=%d, width=%d, height=%d, unk1=%d unk2=%d\n",
157 size, w, h, unk1, unk2);
159 if (av_new_packet(pkt, size) < 0)
162 pkt->pos = url_ftell(&s->pb);
163 pkt->stream_index = 0;
164 ret = get_buffer(&s->pb, pkt->data, size);
173 static int raw_read_close(AVFormatContext *s)
178 int pcm_read_seek(AVFormatContext *s,
179 int stream_index, int64_t timestamp, int flags)
182 int block_align, byte_rate;
186 switch(st->codec->codec_id) {
187 case CODEC_ID_PCM_S16LE:
188 case CODEC_ID_PCM_S16BE:
189 case CODEC_ID_PCM_U16LE:
190 case CODEC_ID_PCM_U16BE:
191 block_align = 2 * st->codec->channels;
192 byte_rate = block_align * st->codec->sample_rate;
194 case CODEC_ID_PCM_S8:
195 case CODEC_ID_PCM_U8:
196 case CODEC_ID_PCM_MULAW:
197 case CODEC_ID_PCM_ALAW:
198 block_align = st->codec->channels;
199 byte_rate = block_align * st->codec->sample_rate;
202 block_align = st->codec->block_align;
203 byte_rate = st->codec->bit_rate / 8;
207 if (block_align <= 0 || byte_rate <= 0)
210 /* compute the position by aligning it to block_align */
211 pos = av_rescale_rnd(timestamp * byte_rate,
213 st->time_base.den * (int64_t)block_align,
214 (flags & AVSEEK_FLAG_BACKWARD) ? AV_ROUND_DOWN : AV_ROUND_UP);
217 /* recompute exact position */
218 st->cur_dts = av_rescale(pos, st->time_base.den, byte_rate * (int64_t)st->time_base.num);
219 url_fseek(&s->pb, pos + s->data_offset, SEEK_SET);
224 static int ac3_read_header(AVFormatContext *s,
225 AVFormatParameters *ap)
229 st = av_new_stream(s, 0);
231 return AVERROR_NOMEM;
233 st->codec->codec_type = CODEC_TYPE_AUDIO;
234 st->codec->codec_id = CODEC_ID_AC3;
235 st->need_parsing = 1;
236 /* the parameters will be extracted from the compressed bitstream */
240 static int shorten_read_header(AVFormatContext *s,
241 AVFormatParameters *ap)
245 st = av_new_stream(s, 0);
247 return AVERROR_NOMEM;
248 st->codec->codec_type = CODEC_TYPE_AUDIO;
249 st->codec->codec_id = CODEC_ID_SHORTEN;
250 st->need_parsing = 1;
251 /* the parameters will be extracted from the compressed bitstream */
256 static int flac_read_header(AVFormatContext *s,
257 AVFormatParameters *ap)
261 st = av_new_stream(s, 0);
263 return AVERROR_NOMEM;
264 st->codec->codec_type = CODEC_TYPE_AUDIO;
265 st->codec->codec_id = CODEC_ID_FLAC;
266 st->need_parsing = 1;
267 /* the parameters will be extracted from the compressed bitstream */
272 static int dts_read_header(AVFormatContext *s,
273 AVFormatParameters *ap)
277 st = av_new_stream(s, 0);
279 return AVERROR_NOMEM;
281 st->codec->codec_type = CODEC_TYPE_AUDIO;
282 st->codec->codec_id = CODEC_ID_DTS;
283 st->need_parsing = 1;
284 /* the parameters will be extracted from the compressed bitstream */
289 static int aac_read_header(AVFormatContext *s,
290 AVFormatParameters *ap)
294 st = av_new_stream(s, 0);
296 return AVERROR_NOMEM;
298 st->codec->codec_type = CODEC_TYPE_AUDIO;
299 st->codec->codec_id = CODEC_ID_AAC;
300 st->need_parsing = 1;
301 /* the parameters will be extracted from the compressed bitstream */
305 /* mpeg1/h263 input */
306 static int video_read_header(AVFormatContext *s,
307 AVFormatParameters *ap)
311 st = av_new_stream(s, 0);
313 return AVERROR_NOMEM;
315 st->codec->codec_type = CODEC_TYPE_VIDEO;
316 st->codec->codec_id = s->iformat->value;
317 st->need_parsing = 1;
319 /* for mjpeg, specify frame rate */
320 /* for mpeg4 specify it too (most mpeg4 streams dont have the fixed_vop_rate set ...)*/
321 if (ap->time_base.num) {
322 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
323 } else if ( st->codec->codec_id == CODEC_ID_MJPEG ||
324 st->codec->codec_id == CODEC_ID_MPEG4 ||
325 st->codec->codec_id == CODEC_ID_H264) {
326 av_set_pts_info(st, 64, 1, 25);
332 #define SEQ_START_CODE 0x000001b3
333 #define GOP_START_CODE 0x000001b8
334 #define PICTURE_START_CODE 0x00000100
335 #define SLICE_START_CODE 0x00000101
336 #define PACK_START_CODE 0x000001ba
337 #define VIDEO_ID 0x000001e0
338 #define AUDIO_ID 0x000001c0
340 static int mpegvideo_probe(AVProbeData *p)
343 int pic=0, seq=0, slice=0, pspack=0, pes=0;
346 for(i=0; i<p->buf_size; i++){
347 code = (code<<8) + p->buf[i];
348 if ((code & 0xffffff00) == 0x100) {
350 case SEQ_START_CODE: seq++; break;
351 case PICTURE_START_CODE: pic++; break;
352 case SLICE_START_CODE: slice++; break;
353 case PACK_START_CODE: pspack++; break;
355 case AUDIO_ID: pes++; break;
359 if(seq && seq*9<=pic*10 && pic*9<=slice*10 && !pspack && !pes)
360 return AVPROBE_SCORE_MAX/2+1; // +1 for .mpg
364 static int h263_probe(AVProbeData *p)
372 code = (d[0] << 14) | (d[1] << 6) | (d[2] >> 2);
379 static int h261_probe(AVProbeData *p)
387 code = (d[0] << 12) | (d[1] << 4) | (d[2] >> 4);
394 AVInputFormat shorten_demuxer = {
400 raw_read_partial_packet,
405 AVInputFormat flac_demuxer = {
411 raw_read_partial_packet,
413 .extensions = "flac",
417 AVOutputFormat flac_muxer = {
428 .flags= AVFMT_NOTIMESTAMPS,
430 #endif //CONFIG_MUXERS
432 AVInputFormat ac3_demuxer = {
438 raw_read_partial_packet,
444 AVOutputFormat ac3_muxer = {
455 .flags= AVFMT_NOTIMESTAMPS,
457 #endif //CONFIG_MUXERS
459 AVInputFormat dts_demuxer = {
465 raw_read_partial_packet,
470 AVInputFormat aac_demuxer = {
476 raw_read_partial_packet,
481 AVInputFormat h261_demuxer = {
487 raw_read_partial_packet,
489 .extensions = "h261",
490 .value = CODEC_ID_H261,
494 AVOutputFormat h261_muxer = {
505 .flags= AVFMT_NOTIMESTAMPS,
507 #endif //CONFIG_MUXERS
509 AVInputFormat h263_demuxer = {
515 raw_read_partial_packet,
517 // .extensions = "h263", //FIXME remove after writing mpeg4_probe
518 .value = CODEC_ID_H263,
522 AVOutputFormat h263_muxer = {
533 .flags= AVFMT_NOTIMESTAMPS,
535 #endif //CONFIG_MUXERS
537 AVInputFormat m4v_demuxer = {
539 "raw MPEG4 video format",
541 NULL /*mpegvideo_probe*/,
543 raw_read_partial_packet,
545 .extensions = "m4v", //FIXME remove after writing mpeg4_probe
546 .value = CODEC_ID_MPEG4,
550 AVOutputFormat m4v_muxer = {
552 "raw MPEG4 video format",
561 .flags= AVFMT_NOTIMESTAMPS,
563 #endif //CONFIG_MUXERS
565 AVInputFormat h264_demuxer = {
567 "raw H264 video format",
569 NULL /*mpegvideo_probe*/,
571 raw_read_partial_packet,
573 .extensions = "h26l,h264,264", //FIXME remove after writing mpeg4_probe
574 .value = CODEC_ID_H264,
578 AVOutputFormat h264_muxer = {
580 "raw H264 video format",
589 .flags= AVFMT_NOTIMESTAMPS,
591 #endif //CONFIG_MUXERS
593 AVInputFormat mpegvideo_demuxer = {
599 raw_read_partial_packet,
601 .value = CODEC_ID_MPEG1VIDEO,
605 AVOutputFormat mpeg1video_muxer = {
616 .flags= AVFMT_NOTIMESTAMPS,
618 #endif //CONFIG_MUXERS
621 AVOutputFormat mpeg2video_muxer = {
632 .flags= AVFMT_NOTIMESTAMPS,
634 #endif //CONFIG_MUXERS
636 AVInputFormat mjpeg_demuxer = {
642 raw_read_partial_packet,
644 .extensions = "mjpg,mjpeg",
645 .value = CODEC_ID_MJPEG,
648 AVInputFormat ingenient_demuxer = {
654 ingenient_read_packet,
656 .extensions = "cgi", // FIXME
657 .value = CODEC_ID_MJPEG,
661 AVOutputFormat mjpeg_muxer = {
672 .flags= AVFMT_NOTIMESTAMPS,
674 #endif //CONFIG_MUXERS
678 #define PCMINPUTDEF(name, long_name, ext, codec) \
679 AVInputFormat pcm_ ## name ## _demuxer = {\
692 #define PCMOUTPUTDEF(name, long_name, ext, codec) \
693 AVOutputFormat pcm_ ## name ## _muxer = {\
704 .flags= AVFMT_NOTIMESTAMPS,\
708 #if !defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
709 #define PCMDEF(name, long_name, ext, codec) \
710 PCMINPUTDEF(name, long_name, ext, codec)
711 #elif defined(CONFIG_MUXERS) && !defined(CONFIG_DEMUXERS)
712 #define PCMDEF(name, long_name, ext, codec) \
713 PCMOUTPUTDEF(name, long_name, ext, codec)
714 #elif defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
715 #define PCMDEF(name, long_name, ext, codec) \
716 PCMINPUTDEF(name, long_name, ext, codec)\
717 PCMOUTPUTDEF(name, long_name, ext, codec)
719 #define PCMDEF(name, long_name, ext, codec)
722 #ifdef WORDS_BIGENDIAN
724 #define LE_DEF(s) NULL
726 #define BE_DEF(s) NULL
731 PCMDEF(s16le, "pcm signed 16 bit little endian format",
732 LE_DEF("sw"), CODEC_ID_PCM_S16LE)
734 PCMDEF(s16be, "pcm signed 16 bit big endian format",
735 BE_DEF("sw"), CODEC_ID_PCM_S16BE)
737 PCMDEF(u16le, "pcm unsigned 16 bit little endian format",
738 LE_DEF("uw"), CODEC_ID_PCM_U16LE)
740 PCMDEF(u16be, "pcm unsigned 16 bit big endian format",
741 BE_DEF("uw"), CODEC_ID_PCM_U16BE)
743 PCMDEF(s8, "pcm signed 8 bit format",
744 "sb", CODEC_ID_PCM_S8)
746 PCMDEF(u8, "pcm unsigned 8 bit format",
747 "ub", CODEC_ID_PCM_U8)
749 PCMDEF(mulaw, "pcm mu law format",
750 "ul", CODEC_ID_PCM_MULAW)
752 PCMDEF(alaw, "pcm A law format",
753 "al", CODEC_ID_PCM_ALAW)
755 static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
757 int packet_size, ret, width, height;
758 AVStream *st = s->streams[0];
760 width = st->codec->width;
761 height = st->codec->height;
763 packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);
767 ret= av_get_packet(&s->pb, pkt, packet_size);
769 pkt->stream_index = 0;
770 if (ret != packet_size) {
777 AVInputFormat rawvideo_demuxer = {
783 rawvideo_read_packet,
785 .extensions = "yuv,cif,qcif",
786 .value = CODEC_ID_RAWVIDEO,
790 AVOutputFormat rawvideo_muxer = {
801 .flags= AVFMT_NOTIMESTAMPS,
803 #endif //CONFIG_MUXERS
806 static int null_write_packet(struct AVFormatContext *s, AVPacket *pkt)
811 AVOutputFormat null_muxer = {
817 #ifdef WORDS_BIGENDIAN
826 .flags = AVFMT_NOFILE | AVFMT_RAWPICTURE | AVFMT_NOTIMESTAMPS,
828 #endif //CONFIG_MUXERS