486 lines
11 KiB
C
486 lines
11 KiB
C
/*
|
|
* RAW encoder and decoder
|
|
* Copyright (c) 2001 Fabrice Bellard.
|
|
*
|
|
* 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"
|
|
|
|
/* simple formats */
|
|
int raw_write_header(struct AVFormatContext *s)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int raw_write_packet(struct AVFormatContext *s,
|
|
int stream_index,
|
|
unsigned char *buf, int size, int force_pts)
|
|
{
|
|
put_buffer(&s->pb, buf, size);
|
|
put_flush_packet(&s->pb);
|
|
return 0;
|
|
}
|
|
|
|
int raw_write_trailer(struct AVFormatContext *s)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/* raw input */
|
|
static int raw_read_header(AVFormatContext *s,
|
|
AVFormatParameters *ap)
|
|
{
|
|
AVStream *st;
|
|
int id;
|
|
|
|
st = av_new_stream(s, 0);
|
|
if (!st)
|
|
return AVERROR_NOMEM;
|
|
if (ap) {
|
|
id = s->iformat->value;
|
|
if (id == CODEC_ID_RAWVIDEO) {
|
|
st->codec.codec_type = CODEC_TYPE_VIDEO;
|
|
} else {
|
|
st->codec.codec_type = CODEC_TYPE_AUDIO;
|
|
}
|
|
st->codec.codec_id = id;
|
|
|
|
switch(st->codec.codec_type) {
|
|
case CODEC_TYPE_AUDIO:
|
|
st->codec.sample_rate = ap->sample_rate;
|
|
st->codec.channels = ap->channels;
|
|
break;
|
|
case CODEC_TYPE_VIDEO:
|
|
st->codec.frame_rate = ap->frame_rate;
|
|
st->codec.width = ap->width;
|
|
st->codec.height = ap->height;
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
} else {
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#define RAW_PACKET_SIZE 1024
|
|
|
|
int raw_read_packet(AVFormatContext *s,
|
|
AVPacket *pkt)
|
|
{
|
|
int ret, size;
|
|
AVStream *st = s->streams[0];
|
|
|
|
if(st->codec.codec_id == CODEC_ID_MPEG4)
|
|
size= 1024*1024; //cant handle partial frames
|
|
else
|
|
size= RAW_PACKET_SIZE;
|
|
|
|
if (av_new_packet(pkt, size) < 0)
|
|
return -EIO;
|
|
|
|
pkt->stream_index = 0;
|
|
ret = get_buffer(&s->pb, pkt->data, size);
|
|
if (ret <= 0) {
|
|
av_free_packet(pkt);
|
|
return -EIO;
|
|
}
|
|
/* note: we need to modify the packet size here to handle the last
|
|
packet */
|
|
pkt->size = ret;
|
|
return ret;
|
|
}
|
|
|
|
int raw_read_close(AVFormatContext *s)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/* mp3 read */
|
|
static int mp3_read_header(AVFormatContext *s,
|
|
AVFormatParameters *ap)
|
|
{
|
|
AVStream *st;
|
|
|
|
st = av_new_stream(s, 0);
|
|
if (!st)
|
|
return AVERROR_NOMEM;
|
|
|
|
st->codec.codec_type = CODEC_TYPE_AUDIO;
|
|
st->codec.codec_id = CODEC_ID_MP2;
|
|
/* the parameters will be extracted from the compressed bitstream */
|
|
return 0;
|
|
}
|
|
|
|
/* mpeg1/h263 input */
|
|
static int video_read_header(AVFormatContext *s,
|
|
AVFormatParameters *ap)
|
|
{
|
|
AVStream *st;
|
|
|
|
st = av_new_stream(s, 0);
|
|
if (!st)
|
|
return AVERROR_NOMEM;
|
|
|
|
st->codec.codec_type = CODEC_TYPE_VIDEO;
|
|
st->codec.codec_id = s->iformat->value;
|
|
/* for mjpeg, specify frame rate */
|
|
/* for mpeg4 specify it too (most mpeg4 streams dont have the fixed_vop_rate set ...)*/
|
|
if (st->codec.codec_id == CODEC_ID_MJPEG || st->codec.codec_id == CODEC_ID_MPEG4) {
|
|
if (ap) {
|
|
st->codec.frame_rate = ap->frame_rate;
|
|
} else {
|
|
st->codec.frame_rate = 25 * FRAME_RATE_BASE;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#define SEQ_START_CODE 0x000001b3
|
|
#define GOP_START_CODE 0x000001b8
|
|
#define PICTURE_START_CODE 0x00000100
|
|
|
|
/* XXX: improve that by looking at several start codes */
|
|
static int mpegvideo_probe(AVProbeData *p)
|
|
{
|
|
int code, c, i;
|
|
code = 0xff;
|
|
|
|
/* we search the first start code. If it is a sequence, gop or
|
|
picture start code then we decide it is an mpeg video
|
|
stream. We do not send highest value to give a chance to mpegts */
|
|
for(i=0;i<p->buf_size;i++) {
|
|
c = p->buf[i];
|
|
code = (code << 8) | c;
|
|
if ((code & 0xffffff00) == 0x100) {
|
|
if (code == SEQ_START_CODE ||
|
|
code == GOP_START_CODE ||
|
|
code == PICTURE_START_CODE)
|
|
return AVPROBE_SCORE_MAX - 1;
|
|
else
|
|
return 0;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
AVInputFormat mp3_iformat = {
|
|
"mp3",
|
|
"MPEG audio",
|
|
0,
|
|
NULL,
|
|
mp3_read_header,
|
|
raw_read_packet,
|
|
raw_read_close,
|
|
.extensions = "mp2,mp3", /* XXX: use probe */
|
|
};
|
|
|
|
AVOutputFormat mp2_oformat = {
|
|
"mp2",
|
|
"MPEG audio layer 2",
|
|
"audio/x-mpeg",
|
|
"mp2,mp3",
|
|
0,
|
|
CODEC_ID_MP2,
|
|
0,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
};
|
|
|
|
|
|
AVInputFormat ac3_iformat = {
|
|
"ac3",
|
|
"raw ac3",
|
|
0,
|
|
NULL,
|
|
raw_read_header,
|
|
raw_read_packet,
|
|
raw_read_close,
|
|
.extensions = "ac3",
|
|
.value = CODEC_ID_AC3,
|
|
};
|
|
|
|
AVOutputFormat ac3_oformat = {
|
|
"ac3",
|
|
"raw ac3",
|
|
"audio/x-ac3",
|
|
"ac3",
|
|
0,
|
|
CODEC_ID_AC3,
|
|
0,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
};
|
|
|
|
AVOutputFormat h263_oformat = {
|
|
"h263",
|
|
"raw h263",
|
|
"video/x-h263",
|
|
"h263",
|
|
0,
|
|
0,
|
|
CODEC_ID_H263,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
};
|
|
|
|
AVInputFormat m4v_iformat = {
|
|
"m4v",
|
|
"raw MPEG4 video format",
|
|
0,
|
|
NULL /*mpegvideo_probe*/,
|
|
video_read_header,
|
|
raw_read_packet,
|
|
raw_read_close,
|
|
.extensions = "m4v", //FIXME remove after writing mpeg4_probe
|
|
.value = CODEC_ID_MPEG4,
|
|
};
|
|
|
|
AVOutputFormat m4v_oformat = {
|
|
"m4v",
|
|
"raw MPEG4 video format",
|
|
NULL,
|
|
"m4v",
|
|
0,
|
|
CODEC_ID_NONE,
|
|
CODEC_ID_MPEG4,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
};
|
|
|
|
AVInputFormat mpegvideo_iformat = {
|
|
"mpegvideo",
|
|
"MPEG video",
|
|
0,
|
|
mpegvideo_probe,
|
|
video_read_header,
|
|
raw_read_packet,
|
|
raw_read_close,
|
|
.value = CODEC_ID_MPEG1VIDEO,
|
|
};
|
|
|
|
AVOutputFormat mpeg1video_oformat = {
|
|
"mpeg1video",
|
|
"MPEG video",
|
|
"video/x-mpeg",
|
|
"mpg,mpeg",
|
|
0,
|
|
0,
|
|
CODEC_ID_MPEG1VIDEO,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
};
|
|
|
|
AVInputFormat mjpeg_iformat = {
|
|
"mjpeg",
|
|
"MJPEG video",
|
|
0,
|
|
NULL,
|
|
video_read_header,
|
|
raw_read_packet,
|
|
raw_read_close,
|
|
.extensions = "mjpg,mjpeg",
|
|
.value = CODEC_ID_MJPEG,
|
|
};
|
|
|
|
AVOutputFormat mjpeg_oformat = {
|
|
"mjpeg",
|
|
"MJPEG video",
|
|
"video/x-mjpeg",
|
|
"mjpg,mjpeg",
|
|
0,
|
|
0,
|
|
CODEC_ID_MJPEG,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
};
|
|
|
|
/* pcm formats */
|
|
|
|
#define PCMDEF(name, long_name, ext, codec) \
|
|
AVInputFormat pcm_ ## name ## _iformat = {\
|
|
#name,\
|
|
long_name,\
|
|
0,\
|
|
NULL,\
|
|
raw_read_header,\
|
|
raw_read_packet,\
|
|
raw_read_close,\
|
|
.extensions = ext,\
|
|
.value = codec,\
|
|
};\
|
|
\
|
|
AVOutputFormat pcm_ ## name ## _oformat = {\
|
|
#name,\
|
|
long_name,\
|
|
NULL,\
|
|
ext,\
|
|
0,\
|
|
codec,\
|
|
0,\
|
|
raw_write_header,\
|
|
raw_write_packet,\
|
|
raw_write_trailer,\
|
|
};
|
|
|
|
#ifdef WORDS_BIGENDIAN
|
|
#define BE_DEF(s) s
|
|
#define LE_DEF(s) NULL
|
|
#else
|
|
#define BE_DEF(s) NULL
|
|
#define LE_DEF(s) s
|
|
#endif
|
|
|
|
|
|
PCMDEF(s16le, "pcm signed 16 bit little endian format",
|
|
LE_DEF("sw"), CODEC_ID_PCM_S16LE)
|
|
|
|
PCMDEF(s16be, "pcm signed 16 bit big endian format",
|
|
BE_DEF("sw"), CODEC_ID_PCM_S16BE)
|
|
|
|
PCMDEF(u16le, "pcm unsigned 16 bit little endian format",
|
|
LE_DEF("uw"), CODEC_ID_PCM_U16LE)
|
|
|
|
PCMDEF(u16be, "pcm unsigned 16 bit big endian format",
|
|
BE_DEF("uw"), CODEC_ID_PCM_U16BE)
|
|
|
|
PCMDEF(s8, "pcm signed 8 bit format",
|
|
"sb", CODEC_ID_PCM_S8)
|
|
|
|
PCMDEF(u8, "pcm unsigned 8 bit format",
|
|
"ub", CODEC_ID_PCM_U8)
|
|
|
|
PCMDEF(mulaw, "pcm mu law format",
|
|
"ul", CODEC_ID_PCM_MULAW)
|
|
|
|
PCMDEF(alaw, "pcm A law format",
|
|
"al", CODEC_ID_PCM_ALAW)
|
|
|
|
int rawvideo_read_packet(AVFormatContext *s,
|
|
AVPacket *pkt)
|
|
{
|
|
int packet_size, ret, width, height;
|
|
AVStream *st = s->streams[0];
|
|
|
|
width = st->codec.width;
|
|
height = st->codec.height;
|
|
|
|
switch(st->codec.pix_fmt) {
|
|
case PIX_FMT_YUV420P:
|
|
packet_size = (width * height * 3) / 2;
|
|
break;
|
|
case PIX_FMT_YUV422:
|
|
packet_size = (width * height * 2);
|
|
break;
|
|
case PIX_FMT_BGR24:
|
|
case PIX_FMT_RGB24:
|
|
packet_size = (width * height * 3);
|
|
break;
|
|
default:
|
|
av_abort();
|
|
break;
|
|
}
|
|
|
|
if (av_new_packet(pkt, packet_size) < 0)
|
|
return -EIO;
|
|
|
|
pkt->stream_index = 0;
|
|
#if 0
|
|
/* bypass buffered I/O */
|
|
ret = url_read(url_fileno(&s->pb), pkt->data, pkt->size);
|
|
#else
|
|
ret = get_buffer(&s->pb, pkt->data, pkt->size);
|
|
#endif
|
|
if (ret != pkt->size) {
|
|
av_free_packet(pkt);
|
|
return -EIO;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
AVInputFormat rawvideo_iformat = {
|
|
"rawvideo",
|
|
"raw video format",
|
|
0,
|
|
NULL,
|
|
raw_read_header,
|
|
rawvideo_read_packet,
|
|
raw_read_close,
|
|
.extensions = "yuv",
|
|
.value = CODEC_ID_RAWVIDEO,
|
|
};
|
|
|
|
AVOutputFormat rawvideo_oformat = {
|
|
"rawvideo",
|
|
"raw video format",
|
|
NULL,
|
|
"yuv",
|
|
0,
|
|
CODEC_ID_NONE,
|
|
CODEC_ID_RAWVIDEO,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
};
|
|
|
|
int raw_init(void)
|
|
{
|
|
av_register_input_format(&mp3_iformat);
|
|
av_register_output_format(&mp2_oformat);
|
|
|
|
av_register_input_format(&ac3_iformat);
|
|
av_register_output_format(&ac3_oformat);
|
|
|
|
av_register_output_format(&h263_oformat);
|
|
|
|
av_register_input_format(&m4v_iformat);
|
|
av_register_output_format(&m4v_oformat);
|
|
|
|
av_register_input_format(&mpegvideo_iformat);
|
|
av_register_output_format(&mpeg1video_oformat);
|
|
|
|
av_register_input_format(&mjpeg_iformat);
|
|
av_register_output_format(&mjpeg_oformat);
|
|
|
|
av_register_input_format(&pcm_s16le_iformat);
|
|
av_register_output_format(&pcm_s16le_oformat);
|
|
av_register_input_format(&pcm_s16be_iformat);
|
|
av_register_output_format(&pcm_s16be_oformat);
|
|
av_register_input_format(&pcm_u16le_iformat);
|
|
av_register_output_format(&pcm_u16le_oformat);
|
|
av_register_input_format(&pcm_u16be_iformat);
|
|
av_register_output_format(&pcm_u16be_oformat);
|
|
av_register_input_format(&pcm_s8_iformat);
|
|
av_register_output_format(&pcm_s8_oformat);
|
|
av_register_input_format(&pcm_u8_iformat);
|
|
av_register_output_format(&pcm_u8_oformat);
|
|
av_register_input_format(&pcm_mulaw_iformat);
|
|
av_register_output_format(&pcm_mulaw_oformat);
|
|
av_register_input_format(&pcm_alaw_iformat);
|
|
av_register_output_format(&pcm_alaw_oformat);
|
|
|
|
av_register_input_format(&rawvideo_iformat);
|
|
av_register_output_format(&rawvideo_oformat);
|
|
return 0;
|
|
}
|