2 * RAW encoder and decoder
3 * Copyright (c) 2001 Fabrice Bellard.
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 static int raw_write_header(struct AVFormatContext
*s
)
27 static int raw_write_packet(struct AVFormatContext
*s
, int stream_index
,
28 unsigned char *buf
, int size
, int force_pts
)
30 put_buffer(&s
->pb
, buf
, size
);
31 put_flush_packet(&s
->pb
);
35 static int raw_write_trailer(struct AVFormatContext
*s
)
41 static int raw_read_header(AVFormatContext
*s
, AVFormatParameters
*ap
)
46 st
= av_new_stream(s
, 0);
50 id
= s
->iformat
->value
;
51 if (id
== CODEC_ID_RAWVIDEO
) {
52 st
->codec
.codec_type
= CODEC_TYPE_VIDEO
;
54 st
->codec
.codec_type
= CODEC_TYPE_AUDIO
;
56 st
->codec
.codec_id
= id
;
58 switch(st
->codec
.codec_type
) {
59 case CODEC_TYPE_AUDIO
:
60 st
->codec
.sample_rate
= ap
->sample_rate
;
61 st
->codec
.channels
= ap
->channels
;
63 case CODEC_TYPE_VIDEO
:
64 st
->codec
.frame_rate
= ap
->frame_rate
;
65 st
->codec
.frame_rate_base
= ap
->frame_rate_base
;
66 st
->codec
.width
= ap
->width
;
67 st
->codec
.height
= ap
->height
;
68 st
->codec
.pix_fmt
= ap
->pix_fmt
;
79 #define RAW_PACKET_SIZE 1024
81 static int raw_read_packet(AVFormatContext
*s
, AVPacket
*pkt
)
84 // AVStream *st = s->streams[0];
86 size
= RAW_PACKET_SIZE
;
88 if (av_new_packet(pkt
, size
) < 0)
91 pkt
->stream_index
= 0;
92 ret
= get_buffer(&s
->pb
, pkt
->data
, size
);
97 /* note: we need to modify the packet size here to handle the last
103 static int raw_read_close(AVFormatContext
*s
)
109 static int ac3_read_header(AVFormatContext
*s
,
110 AVFormatParameters
*ap
)
114 st
= av_new_stream(s
, 0);
116 return AVERROR_NOMEM
;
118 st
->codec
.codec_type
= CODEC_TYPE_AUDIO
;
119 st
->codec
.codec_id
= CODEC_ID_AC3
;
120 /* the parameters will be extracted from the compressed bitstream */
124 /* mpeg1/h263 input */
125 static int video_read_header(AVFormatContext
*s
,
126 AVFormatParameters
*ap
)
130 st
= av_new_stream(s
, 0);
132 return AVERROR_NOMEM
;
134 st
->codec
.codec_type
= CODEC_TYPE_VIDEO
;
135 st
->codec
.codec_id
= s
->iformat
->value
;
136 /* for mjpeg, specify frame rate */
137 /* for mpeg4 specify it too (most mpeg4 streams dont have the fixed_vop_rate set ...)*/
138 if (st
->codec
.codec_id
== CODEC_ID_MJPEG
|| st
->codec
.codec_id
== CODEC_ID_MPEG4
) {
140 st
->codec
.frame_rate
= ap
->frame_rate
;
141 st
->codec
.frame_rate_base
= ap
->frame_rate_base
;
143 st
->codec
.frame_rate
= 25;
144 st
->codec
.frame_rate_base
= 1;
150 #define SEQ_START_CODE 0x000001b3
151 #define GOP_START_CODE 0x000001b8
152 #define PICTURE_START_CODE 0x00000100
154 /* XXX: improve that by looking at several start codes */
155 static int mpegvideo_probe(AVProbeData
*p
)
160 /* we search the first start code. If it is a sequence, gop or
161 picture start code then we decide it is an mpeg video
162 stream. We do not send highest value to give a chance to mpegts */
163 /* NOTE: the search range was restricted to avoid too many false
169 code
= (d
[0] << 24) | (d
[1] << 16) | (d
[2] << 8) | (d
[3]);
170 if ((code
& 0xffffff00) == 0x100) {
171 if (code
== SEQ_START_CODE
||
172 code
== GOP_START_CODE
||
173 code
== PICTURE_START_CODE
)
181 static int h263_probe(AVProbeData
*p
)
189 code
= (d
[0] << 14) | (d
[1] << 6) | (d
[2] >> 2);
196 AVInputFormat ac3_iformat
= {
207 AVOutputFormat ac3_oformat
= {
220 AVInputFormat h263_iformat
= {
228 // .extensions = "h263", //FIXME remove after writing mpeg4_probe
229 .value
= CODEC_ID_H263
,
232 AVOutputFormat h263_oformat
= {
245 AVInputFormat m4v_iformat
= {
247 "raw MPEG4 video format",
249 NULL
/*mpegvideo_probe*/,
253 .extensions
= "m4v", //FIXME remove after writing mpeg4_probe
254 .value
= CODEC_ID_MPEG4
,
257 AVOutputFormat m4v_oformat
= {
259 "raw MPEG4 video format",
270 AVInputFormat h264_iformat
= {
272 "raw H264 video format",
274 NULL
/*mpegvideo_probe*/,
278 .extensions
= "h26l,h264", //FIXME remove after writing mpeg4_probe
279 .value
= CODEC_ID_H264
,
282 AVOutputFormat h264_oformat
= {
284 "raw H264 video format",
295 AVInputFormat mpegvideo_iformat
= {
303 .value
= CODEC_ID_MPEG1VIDEO
,
306 AVOutputFormat mpeg1video_oformat
= {
319 AVInputFormat mjpeg_iformat
= {
327 .extensions
= "mjpg,mjpeg",
328 .value
= CODEC_ID_MJPEG
,
331 AVOutputFormat mjpeg_oformat
= {
346 #define PCMDEF(name, long_name, ext, codec) \
347 AVInputFormat pcm_ ## name ## _iformat = {\
359 AVOutputFormat pcm_ ## name ## _oformat = {\
372 #ifdef WORDS_BIGENDIAN
374 #define LE_DEF(s) NULL
376 #define BE_DEF(s) NULL
381 PCMDEF(s16le
, "pcm signed 16 bit little endian format",
382 LE_DEF("sw"), CODEC_ID_PCM_S16LE
)
384 PCMDEF(s16be
, "pcm signed 16 bit big endian format",
385 BE_DEF("sw"), CODEC_ID_PCM_S16BE
)
387 PCMDEF(u16le
, "pcm unsigned 16 bit little endian format",
388 LE_DEF("uw"), CODEC_ID_PCM_U16LE
)
390 PCMDEF(u16be
, "pcm unsigned 16 bit big endian format",
391 BE_DEF("uw"), CODEC_ID_PCM_U16BE
)
393 PCMDEF(s8
, "pcm signed 8 bit format",
394 "sb", CODEC_ID_PCM_S8
)
396 PCMDEF(u8
, "pcm unsigned 8 bit format",
397 "ub", CODEC_ID_PCM_U8
)
399 PCMDEF(mulaw
, "pcm mu law format",
400 "ul", CODEC_ID_PCM_MULAW
)
402 PCMDEF(alaw
, "pcm A law format",
403 "al", CODEC_ID_PCM_ALAW
)
405 static int rawvideo_read_packet(AVFormatContext
*s
, AVPacket
*pkt
)
407 int packet_size
, ret
, width
, height
;
408 AVStream
*st
= s
->streams
[0];
410 width
= st
->codec
.width
;
411 height
= st
->codec
.height
;
413 packet_size
= avpicture_get_size(st
->codec
.pix_fmt
, width
, height
);
417 if (av_new_packet(pkt
, packet_size
) < 0)
420 pkt
->stream_index
= 0;
422 /* bypass buffered I/O */
423 ret
= url_read(url_fileno(&s
->pb
), pkt
->data
, pkt
->size
);
425 ret
= get_buffer(&s
->pb
, pkt
->data
, pkt
->size
);
427 if (ret
!= pkt
->size
) {
435 AVInputFormat rawvideo_iformat
= {
441 rawvideo_read_packet
,
444 .value
= CODEC_ID_RAWVIDEO
,
447 AVOutputFormat rawvideo_oformat
= {
460 static int null_write_packet(struct AVFormatContext
*s
,
462 unsigned char *buf
, int size
, int force_pts
)
467 AVOutputFormat null_oformat
= {
473 #ifdef WORDS_BIGENDIAN
482 .flags
= AVFMT_NOFILE
| AVFMT_RAWPICTURE
,
487 av_register_input_format(&ac3_iformat
);
488 av_register_output_format(&ac3_oformat
);
490 av_register_input_format(&h263_iformat
);
491 av_register_output_format(&h263_oformat
);
493 av_register_input_format(&m4v_iformat
);
494 av_register_output_format(&m4v_oformat
);
496 av_register_input_format(&h264_iformat
);
497 av_register_output_format(&h264_oformat
);
499 av_register_input_format(&mpegvideo_iformat
);
500 av_register_output_format(&mpeg1video_oformat
);
502 av_register_input_format(&mjpeg_iformat
);
503 av_register_output_format(&mjpeg_oformat
);
505 av_register_input_format(&pcm_s16le_iformat
);
506 av_register_output_format(&pcm_s16le_oformat
);
507 av_register_input_format(&pcm_s16be_iformat
);
508 av_register_output_format(&pcm_s16be_oformat
);
509 av_register_input_format(&pcm_u16le_iformat
);
510 av_register_output_format(&pcm_u16le_oformat
);
511 av_register_input_format(&pcm_u16be_iformat
);
512 av_register_output_format(&pcm_u16be_oformat
);
513 av_register_input_format(&pcm_s8_iformat
);
514 av_register_output_format(&pcm_s8_oformat
);
515 av_register_input_format(&pcm_u8_iformat
);
516 av_register_output_format(&pcm_u8_oformat
);
517 av_register_input_format(&pcm_mulaw_iformat
);
518 av_register_output_format(&pcm_mulaw_oformat
);
519 av_register_input_format(&pcm_alaw_iformat
);
520 av_register_output_format(&pcm_alaw_oformat
);
522 av_register_input_format(&rawvideo_iformat
);
523 av_register_output_format(&rawvideo_oformat
);
525 av_register_output_format(&null_oformat
);