2 * RAW encoder and decoder
3 * Copyright (c) 2001 Fabrice Bellard.
4 * Copyright (c) 2005 Alex Beregszaszi
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 static int raw_write_header(struct AVFormatContext *s)
29 static int raw_write_packet(struct AVFormatContext *s, AVPacket *pkt)
31 put_buffer(&s->pb, pkt->data, pkt->size);
32 put_flush_packet(&s->pb);
36 static int raw_write_trailer(struct AVFormatContext *s)
40 #endif //CONFIG_MUXERS
43 static int raw_read_header(AVFormatContext *s, AVFormatParameters *ap)
48 st = av_new_stream(s, 0);
52 id = s->iformat->value;
53 if (id == CODEC_ID_RAWVIDEO) {
54 st->codec->codec_type = CODEC_TYPE_VIDEO;
56 st->codec->codec_type = CODEC_TYPE_AUDIO;
58 st->codec->codec_id = id;
60 switch(st->codec->codec_type) {
61 case CODEC_TYPE_AUDIO:
62 st->codec->sample_rate = ap->sample_rate;
63 st->codec->channels = ap->channels;
64 av_set_pts_info(st, 64, 1, st->codec->sample_rate);
66 case CODEC_TYPE_VIDEO:
67 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
68 st->codec->width = ap->width;
69 st->codec->height = ap->height;
70 st->codec->pix_fmt = ap->pix_fmt;
71 if(st->codec->pix_fmt == PIX_FMT_NONE)
72 st->codec->pix_fmt= PIX_FMT_YUV420P;
80 #define RAW_PACKET_SIZE 1024
82 static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
85 // AVStream *st = s->streams[0];
87 size= RAW_PACKET_SIZE;
89 ret= av_get_packet(&s->pb, pkt, size);
91 pkt->stream_index = 0;
95 /* note: we need to modify the packet size here to handle the last
101 static int raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
105 size = RAW_PACKET_SIZE;
107 if (av_new_packet(pkt, size) < 0)
110 pkt->pos= url_ftell(&s->pb);
111 pkt->stream_index = 0;
112 ret = get_partial_buffer(&s->pb, pkt->data, size);
121 // http://www.artificis.hu/files/texts/ingenient.txt
122 static int ingenient_read_packet(AVFormatContext *s, AVPacket *pkt)
124 int ret, size, w, h, unk1, unk2;
126 if (get_le32(&s->pb) != MKTAG('M', 'J', 'P', 'G'))
127 return AVERROR_IO; // FIXME
129 size = get_le32(&s->pb);
131 w = get_le16(&s->pb);
132 h = get_le16(&s->pb);
134 url_fskip(&s->pb, 8); // zero + size (padded?)
135 url_fskip(&s->pb, 2);
136 unk1 = get_le16(&s->pb);
137 unk2 = get_le16(&s->pb);
138 url_fskip(&s->pb, 22); // ascii timestamp
140 av_log(NULL, AV_LOG_DEBUG, "Ingenient packet: size=%d, width=%d, height=%d, unk1=%d unk2=%d\n",
141 size, w, h, unk1, unk2);
143 if (av_new_packet(pkt, size) < 0)
146 pkt->pos = url_ftell(&s->pb);
147 pkt->stream_index = 0;
148 ret = get_buffer(&s->pb, pkt->data, size);
157 static int raw_read_close(AVFormatContext *s)
162 int pcm_read_seek(AVFormatContext *s,
163 int stream_index, int64_t timestamp, int flags)
166 int block_align, byte_rate;
170 switch(st->codec->codec_id) {
171 case CODEC_ID_PCM_S16LE:
172 case CODEC_ID_PCM_S16BE:
173 case CODEC_ID_PCM_U16LE:
174 case CODEC_ID_PCM_U16BE:
175 block_align = 2 * st->codec->channels;
176 byte_rate = block_align * st->codec->sample_rate;
178 case CODEC_ID_PCM_S8:
179 case CODEC_ID_PCM_U8:
180 case CODEC_ID_PCM_MULAW:
181 case CODEC_ID_PCM_ALAW:
182 block_align = st->codec->channels;
183 byte_rate = block_align * st->codec->sample_rate;
186 block_align = st->codec->block_align;
187 byte_rate = st->codec->bit_rate / 8;
191 if (block_align <= 0 || byte_rate <= 0)
194 /* compute the position by aligning it to block_align */
195 pos = av_rescale_rnd(timestamp * byte_rate,
197 st->time_base.den * (int64_t)block_align,
198 (flags & AVSEEK_FLAG_BACKWARD) ? AV_ROUND_DOWN : AV_ROUND_UP);
201 /* recompute exact position */
202 st->cur_dts = av_rescale(pos, st->time_base.den, byte_rate * (int64_t)st->time_base.num);
203 url_fseek(&s->pb, pos + s->data_offset, SEEK_SET);
208 static int ac3_read_header(AVFormatContext *s,
209 AVFormatParameters *ap)
213 st = av_new_stream(s, 0);
215 return AVERROR_NOMEM;
217 st->codec->codec_type = CODEC_TYPE_AUDIO;
218 st->codec->codec_id = CODEC_ID_AC3;
219 st->need_parsing = 1;
220 /* the parameters will be extracted from the compressed bitstream */
224 static int shorten_read_header(AVFormatContext *s,
225 AVFormatParameters *ap)
229 st = av_new_stream(s, 0);
231 return AVERROR_NOMEM;
232 st->codec->codec_type = CODEC_TYPE_AUDIO;
233 st->codec->codec_id = CODEC_ID_SHORTEN;
234 st->need_parsing = 1;
235 /* the parameters will be extracted from the compressed bitstream */
240 static int dts_read_header(AVFormatContext *s,
241 AVFormatParameters *ap)
245 st = av_new_stream(s, 0);
247 return AVERROR_NOMEM;
249 st->codec->codec_type = CODEC_TYPE_AUDIO;
250 st->codec->codec_id = CODEC_ID_DTS;
251 st->need_parsing = 1;
252 /* the parameters will be extracted from the compressed bitstream */
257 static int aac_read_header(AVFormatContext *s,
258 AVFormatParameters *ap)
262 st = av_new_stream(s, 0);
264 return AVERROR_NOMEM;
266 st->codec->codec_type = CODEC_TYPE_AUDIO;
267 st->codec->codec_id = CODEC_ID_AAC;
268 st->need_parsing = 1;
269 /* the parameters will be extracted from the compressed bitstream */
273 /* mpeg1/h263 input */
274 static int video_read_header(AVFormatContext *s,
275 AVFormatParameters *ap)
279 st = av_new_stream(s, 0);
281 return AVERROR_NOMEM;
283 st->codec->codec_type = CODEC_TYPE_VIDEO;
284 st->codec->codec_id = s->iformat->value;
285 st->need_parsing = 1;
287 /* for mjpeg, specify frame rate */
288 /* for mpeg4 specify it too (most mpeg4 streams dont have the fixed_vop_rate set ...)*/
289 if (ap->time_base.num) {
290 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
291 } else if ( st->codec->codec_id == CODEC_ID_MJPEG ||
292 st->codec->codec_id == CODEC_ID_MPEG4 ||
293 st->codec->codec_id == CODEC_ID_H264) {
294 av_set_pts_info(st, 64, 1, 25);
300 #define SEQ_START_CODE 0x000001b3
301 #define GOP_START_CODE 0x000001b8
302 #define PICTURE_START_CODE 0x00000100
303 #define SLICE_START_CODE 0x00000101
304 #define PACK_START_CODE 0x000001ba
305 #define VIDEO_ID 0x000001e0
306 #define AUDIO_ID 0x000001c0
308 static int mpegvideo_probe(AVProbeData *p)
311 int pic=0, seq=0, slice=0, pspack=0, pes=0;
314 for(i=0; i<p->buf_size; i++){
315 code = (code<<8) + p->buf[i];
316 if ((code & 0xffffff00) == 0x100) {
318 case SEQ_START_CODE: seq++; break;
319 case PICTURE_START_CODE: pic++; break;
320 case SLICE_START_CODE: slice++; break;
321 case PACK_START_CODE: pspack++; break;
323 case AUDIO_ID: pes++; break;
327 if(seq && seq*9<=pic*10 && pic*9<=slice*10 && !pspack && !pes)
328 return AVPROBE_SCORE_MAX/2+1; // +1 for .mpg
332 static int h263_probe(AVProbeData *p)
340 code = (d[0] << 14) | (d[1] << 6) | (d[2] >> 2);
347 static int h261_probe(AVProbeData *p)
355 code = (d[0] << 12) | (d[1] << 4) | (d[2] >> 4);
362 AVInputFormat shorten_iformat = {
368 raw_read_partial_packet,
373 AVInputFormat ac3_iformat = {
379 raw_read_partial_packet,
385 AVOutputFormat ac3_oformat = {
397 #endif //CONFIG_MUXERS
399 AVInputFormat dts_iformat = {
405 raw_read_partial_packet,
410 AVInputFormat aac_iformat = {
416 raw_read_partial_packet,
421 AVInputFormat h261_iformat = {
427 raw_read_partial_packet,
429 .extensions = "h261",
430 .value = CODEC_ID_H261,
434 AVOutputFormat h261_oformat = {
446 #endif //CONFIG_MUXERS
448 AVInputFormat h263_iformat = {
454 raw_read_partial_packet,
456 // .extensions = "h263", //FIXME remove after writing mpeg4_probe
457 .value = CODEC_ID_H263,
461 AVOutputFormat h263_oformat = {
473 #endif //CONFIG_MUXERS
475 AVInputFormat m4v_iformat = {
477 "raw MPEG4 video format",
479 NULL /*mpegvideo_probe*/,
481 raw_read_partial_packet,
483 .extensions = "m4v", //FIXME remove after writing mpeg4_probe
484 .value = CODEC_ID_MPEG4,
488 AVOutputFormat m4v_oformat = {
490 "raw MPEG4 video format",
500 #endif //CONFIG_MUXERS
502 AVInputFormat h264_iformat = {
504 "raw H264 video format",
506 NULL /*mpegvideo_probe*/,
508 raw_read_partial_packet,
510 .extensions = "h26l,h264,264", //FIXME remove after writing mpeg4_probe
511 .value = CODEC_ID_H264,
515 AVOutputFormat h264_oformat = {
517 "raw H264 video format",
527 #endif //CONFIG_MUXERS
529 AVInputFormat mpegvideo_iformat = {
535 raw_read_partial_packet,
537 .value = CODEC_ID_MPEG1VIDEO,
541 AVOutputFormat mpeg1video_oformat = {
553 #endif //CONFIG_MUXERS
556 AVOutputFormat mpeg2video_oformat = {
568 #endif //CONFIG_MUXERS
570 AVInputFormat mjpeg_iformat = {
576 raw_read_partial_packet,
578 .extensions = "mjpg,mjpeg",
579 .value = CODEC_ID_MJPEG,
582 AVInputFormat ingenient_iformat = {
588 ingenient_read_packet,
590 .extensions = "cgi", // FIXME
591 .value = CODEC_ID_MJPEG,
595 AVOutputFormat mjpeg_oformat = {
607 #endif //CONFIG_MUXERS
611 #define PCMINPUTDEF(name, long_name, ext, codec) \
612 AVInputFormat pcm_ ## name ## _iformat = {\
625 #if !defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
627 #define PCMDEF(name, long_name, ext, codec) \
628 PCMINPUTDEF(name, long_name, ext, codec)
632 #define PCMDEF(name, long_name, ext, codec) \
633 PCMINPUTDEF(name, long_name, ext, codec)\
635 AVOutputFormat pcm_ ## name ## _oformat = {\
647 #endif //CONFIG_MUXERS
649 #ifdef WORDS_BIGENDIAN
651 #define LE_DEF(s) NULL
653 #define BE_DEF(s) NULL
658 PCMDEF(s16le, "pcm signed 16 bit little endian format",
659 LE_DEF("sw"), CODEC_ID_PCM_S16LE)
661 PCMDEF(s16be, "pcm signed 16 bit big endian format",
662 BE_DEF("sw"), CODEC_ID_PCM_S16BE)
664 PCMDEF(u16le, "pcm unsigned 16 bit little endian format",
665 LE_DEF("uw"), CODEC_ID_PCM_U16LE)
667 PCMDEF(u16be, "pcm unsigned 16 bit big endian format",
668 BE_DEF("uw"), CODEC_ID_PCM_U16BE)
670 PCMDEF(s8, "pcm signed 8 bit format",
671 "sb", CODEC_ID_PCM_S8)
673 PCMDEF(u8, "pcm unsigned 8 bit format",
674 "ub", CODEC_ID_PCM_U8)
676 PCMDEF(mulaw, "pcm mu law format",
677 "ul", CODEC_ID_PCM_MULAW)
679 PCMDEF(alaw, "pcm A law format",
680 "al", CODEC_ID_PCM_ALAW)
682 static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
684 int packet_size, ret, width, height;
685 AVStream *st = s->streams[0];
687 width = st->codec->width;
688 height = st->codec->height;
690 packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);
694 ret= av_get_packet(&s->pb, pkt, packet_size);
696 pkt->stream_index = 0;
697 if (ret != packet_size) {
704 AVInputFormat rawvideo_iformat = {
710 rawvideo_read_packet,
712 .extensions = "yuv,cif,qcif",
713 .value = CODEC_ID_RAWVIDEO,
717 AVOutputFormat rawvideo_oformat = {
729 #endif //CONFIG_MUXERS
732 static int null_write_packet(struct AVFormatContext *s, AVPacket *pkt)
737 AVOutputFormat null_oformat = {
743 #ifdef WORDS_BIGENDIAN
752 .flags = AVFMT_NOFILE | AVFMT_RAWPICTURE,
754 #endif //CONFIG_MUXERS
756 #ifndef CONFIG_MUXERS
757 #define av_register_output_format(format)
759 #ifndef CONFIG_DEMUXERS
760 #define av_register_input_format(format)
766 av_register_input_format(&shorten_iformat);
768 av_register_input_format(&ac3_iformat);
769 av_register_output_format(&ac3_oformat);
771 av_register_input_format(&aac_iformat);
773 av_register_input_format(&dts_iformat);
775 av_register_input_format(&h261_iformat);
776 av_register_output_format(&h261_oformat);
778 av_register_input_format(&h263_iformat);
779 av_register_output_format(&h263_oformat);
781 av_register_input_format(&m4v_iformat);
782 av_register_output_format(&m4v_oformat);
784 av_register_input_format(&h264_iformat);
785 av_register_output_format(&h264_oformat);
787 av_register_input_format(&mpegvideo_iformat);
788 av_register_output_format(&mpeg1video_oformat);
790 av_register_output_format(&mpeg2video_oformat);
792 av_register_input_format(&mjpeg_iformat);
793 av_register_output_format(&mjpeg_oformat);
795 av_register_input_format(&ingenient_iformat);
797 av_register_input_format(&pcm_s16le_iformat);
798 av_register_output_format(&pcm_s16le_oformat);
799 av_register_input_format(&pcm_s16be_iformat);
800 av_register_output_format(&pcm_s16be_oformat);
801 av_register_input_format(&pcm_u16le_iformat);
802 av_register_output_format(&pcm_u16le_oformat);
803 av_register_input_format(&pcm_u16be_iformat);
804 av_register_output_format(&pcm_u16be_oformat);
805 av_register_input_format(&pcm_s8_iformat);
806 av_register_output_format(&pcm_s8_oformat);
807 av_register_input_format(&pcm_u8_iformat);
808 av_register_output_format(&pcm_u8_oformat);
809 av_register_input_format(&pcm_mulaw_iformat);
810 av_register_output_format(&pcm_mulaw_oformat);
811 av_register_input_format(&pcm_alaw_iformat);
812 av_register_output_format(&pcm_alaw_oformat);
814 av_register_input_format(&rawvideo_iformat);
815 av_register_output_format(&rawvideo_oformat);
817 av_register_output_format(&null_oformat);