mirror of
https://github.com/xenia-project/FFmpeg.git
synced 2024-11-30 15:00:29 +00:00
451 lines
8.8 KiB
C
451 lines
8.8 KiB
C
/*
|
|
* RAW encoder and decoder
|
|
* Copyright (c) 2001 Gerard Lantau.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, 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)
|
|
{
|
|
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;
|
|
|
|
st = malloc(sizeof(AVStream));
|
|
if (!st)
|
|
return -1;
|
|
s->nb_streams = 1;
|
|
s->streams[0] = st;
|
|
|
|
st->id = 0;
|
|
|
|
if (ap) {
|
|
if (s->format->audio_codec != CODEC_ID_NONE) {
|
|
st->codec.codec_type = CODEC_TYPE_AUDIO;
|
|
st->codec.codec_id = s->format->audio_codec;
|
|
} else if (s->format->video_codec != CODEC_ID_NONE) {
|
|
st->codec.codec_type = CODEC_TYPE_VIDEO;
|
|
st->codec.codec_id = s->format->video_codec;
|
|
} else {
|
|
free(st);
|
|
return -1;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
/* raw input */
|
|
static int pcm_read_header(AVFormatContext *s,
|
|
AVFormatParameters *ap)
|
|
{
|
|
AVStream *st;
|
|
|
|
st = malloc(sizeof(AVStream));
|
|
if (!st)
|
|
return -1;
|
|
s->nb_streams = 1;
|
|
s->streams[0] = st;
|
|
|
|
st->id = 0;
|
|
|
|
st->codec.codec_type = CODEC_TYPE_AUDIO;
|
|
st->codec.codec_id = s->format->audio_codec;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define RAW_PACKET_SIZE 1024
|
|
|
|
int raw_read_packet(AVFormatContext *s,
|
|
AVPacket *pkt)
|
|
{
|
|
int ret;
|
|
|
|
if (av_new_packet(pkt, RAW_PACKET_SIZE) < 0)
|
|
return -EIO;
|
|
|
|
pkt->stream_index = 0;
|
|
ret = get_buffer(&s->pb, pkt->data, RAW_PACKET_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 = malloc(sizeof(AVStream));
|
|
if (!st)
|
|
return -1;
|
|
s->nb_streams = 1;
|
|
s->streams[0] = st;
|
|
|
|
st->id = 0;
|
|
|
|
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_mallocz(sizeof(AVStream));
|
|
if (!st)
|
|
return -1;
|
|
s->nb_streams = 1;
|
|
s->streams[0] = st;
|
|
|
|
st->codec.codec_type = CODEC_TYPE_VIDEO;
|
|
st->codec.codec_id = s->format->video_codec;
|
|
/* for mjpeg, specify frame rate */
|
|
if (st->codec.codec_id == CODEC_ID_MJPEG) {
|
|
if (ap) {
|
|
st->codec.frame_rate = ap->frame_rate;
|
|
} else {
|
|
st->codec.frame_rate = 25 * FRAME_RATE_BASE;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
AVFormat mp2_format = {
|
|
"mp2",
|
|
"MPEG audio",
|
|
"audio/x-mpeg",
|
|
"mp2,mp3",
|
|
CODEC_ID_MP2,
|
|
0,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
|
|
mp3_read_header,
|
|
raw_read_packet,
|
|
raw_read_close,
|
|
};
|
|
|
|
AVFormat ac3_format = {
|
|
"ac3",
|
|
"raw ac3",
|
|
"audio/x-ac3",
|
|
"ac3",
|
|
CODEC_ID_AC3,
|
|
0,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
};
|
|
|
|
AVFormat h263_format = {
|
|
"h263",
|
|
"raw h263",
|
|
"video/x-h263",
|
|
"h263",
|
|
0,
|
|
CODEC_ID_H263,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
video_read_header,
|
|
raw_read_packet,
|
|
raw_read_close,
|
|
};
|
|
|
|
AVFormat mpeg1video_format = {
|
|
"mpegvideo",
|
|
"MPEG video",
|
|
"video/x-mpeg",
|
|
"mpg,mpeg",
|
|
0,
|
|
CODEC_ID_MPEG1VIDEO,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
video_read_header,
|
|
raw_read_packet,
|
|
raw_read_close,
|
|
};
|
|
|
|
AVFormat mjpeg_format = {
|
|
"mjpeg",
|
|
"MJPEG video",
|
|
"video/x-mjpeg",
|
|
"mjpg,mjpeg",
|
|
0,
|
|
CODEC_ID_MJPEG,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
video_read_header,
|
|
raw_read_packet,
|
|
raw_read_close,
|
|
};
|
|
|
|
/* pcm formats */
|
|
|
|
AVFormat pcm_s16le_format = {
|
|
"s16le",
|
|
"pcm signed 16 bit little endian format",
|
|
NULL,
|
|
#ifdef WORDS_BIGENDIAN
|
|
"",
|
|
#else
|
|
"sw",
|
|
#endif
|
|
CODEC_ID_PCM_S16LE,
|
|
0,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
|
|
pcm_read_header,
|
|
raw_read_packet,
|
|
raw_read_close,
|
|
};
|
|
|
|
AVFormat pcm_s16be_format = {
|
|
"s16be",
|
|
"pcm signed 16 bit big endian format",
|
|
NULL,
|
|
#ifdef WORDS_BIGENDIAN
|
|
"sw",
|
|
#else
|
|
"",
|
|
#endif
|
|
CODEC_ID_PCM_S16BE,
|
|
0,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
|
|
pcm_read_header,
|
|
raw_read_packet,
|
|
raw_read_close,
|
|
};
|
|
|
|
AVFormat pcm_u16le_format = {
|
|
"u16le",
|
|
"pcm unsigned 16 bit little endian format",
|
|
NULL,
|
|
#ifdef WORDS_BIGENDIAN
|
|
"",
|
|
#else
|
|
"uw",
|
|
#endif
|
|
CODEC_ID_PCM_U16LE,
|
|
0,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
|
|
pcm_read_header,
|
|
raw_read_packet,
|
|
raw_read_close,
|
|
};
|
|
|
|
AVFormat pcm_u16be_format = {
|
|
"u16be",
|
|
"pcm unsigned 16 bit big endian format",
|
|
NULL,
|
|
#ifdef WORDS_BIGENDIAN
|
|
"uw",
|
|
#else
|
|
"",
|
|
#endif
|
|
CODEC_ID_PCM_U16BE,
|
|
0,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
|
|
pcm_read_header,
|
|
raw_read_packet,
|
|
raw_read_close,
|
|
};
|
|
|
|
AVFormat pcm_s8_format = {
|
|
"s8",
|
|
"pcm signed 8 bit format",
|
|
NULL,
|
|
"sb",
|
|
CODEC_ID_PCM_S8,
|
|
0,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
|
|
pcm_read_header,
|
|
raw_read_packet,
|
|
raw_read_close,
|
|
};
|
|
|
|
AVFormat pcm_u8_format = {
|
|
"u8",
|
|
"pcm unsigned 8 bit format",
|
|
NULL,
|
|
"ub",
|
|
CODEC_ID_PCM_U8,
|
|
0,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
|
|
pcm_read_header,
|
|
raw_read_packet,
|
|
raw_read_close,
|
|
};
|
|
|
|
AVFormat pcm_mulaw_format = {
|
|
"mulaw",
|
|
"pcm mu law format",
|
|
NULL,
|
|
"ul",
|
|
CODEC_ID_PCM_MULAW,
|
|
0,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
|
|
pcm_read_header,
|
|
raw_read_packet,
|
|
raw_read_close,
|
|
};
|
|
|
|
AVFormat pcm_alaw_format = {
|
|
"alaw",
|
|
"pcm A law format",
|
|
NULL,
|
|
"al",
|
|
CODEC_ID_PCM_ALAW,
|
|
0,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
|
|
pcm_read_header,
|
|
raw_read_packet,
|
|
raw_read_close,
|
|
};
|
|
|
|
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:
|
|
abort();
|
|
break;
|
|
}
|
|
|
|
if (av_new_packet(pkt, packet_size) < 0)
|
|
return -EIO;
|
|
|
|
pkt->stream_index = 0;
|
|
/* bypass buffered I/O */
|
|
ret = url_read(url_fileno(&s->pb), pkt->data, pkt->size);
|
|
if (ret != pkt->size) {
|
|
av_free_packet(pkt);
|
|
return -EIO;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
AVFormat rawvideo_format = {
|
|
"rawvideo",
|
|
"raw video format",
|
|
NULL,
|
|
"yuv",
|
|
CODEC_ID_NONE,
|
|
CODEC_ID_RAWVIDEO,
|
|
raw_write_header,
|
|
raw_write_packet,
|
|
raw_write_trailer,
|
|
|
|
raw_read_header,
|
|
rawvideo_read_packet,
|
|
raw_read_close,
|
|
};
|