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yuv4mpeg output support patch by (Henry Mason <talus25 at speakeasy dot net>)

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Originally committed as revision 908 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Henry Mason 2002-09-06 13:01:19 +00:00 committed by Michael Niedermayer
parent 0b61920aa7
commit ad4369076b
1 changed files with 143 additions and 1 deletions
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144
libav/img.c
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@ -32,11 +32,17 @@ extern AVInputFormat pgmyuvpipe_iformat;
extern AVOutputFormat pgmyuvpipe_oformat;
extern AVInputFormat ppmpipe_iformat;
extern AVOutputFormat ppmpipe_oformat;
extern AVOutputFormat yuv4mpegpipe_oformat;
#define IMGFMT_YUV 1
#define IMGFMT_PGMYUV 2
#define IMGFMT_PGM 3
#define IMGFMT_PPM 4
#define IMGFMT_YUV4MPEG 5
#define Y4M_MAGIC "YUV4MPEG2"
#define Y4M_FRAME_MAGIC "FRAME"
#define Y4M_LINE_MAX 256
typedef struct {
int width;
@ -45,6 +51,7 @@ typedef struct {
int img_size;
int img_fmt;
int is_pipe;
int header_written;
char path[1024];
} VideoData;
@ -351,6 +358,7 @@ static int img_read_header(AVFormatContext *s1, AVFormatParameters *ap)
break;
}
if (!s->is_pipe) {
url_fclose(f);
} else {
@ -482,6 +490,63 @@ static int yuv_save(AVPicture *picture, int width, int height, const char *filen
return 0;
}
static int yuv4mpeg_save(AVPicture *picture, int width, int height, ByteIOContext *pb, int need_stream_header,
int is_yuv, int raten, int rated, int aspectn, int aspectd)
{
int i, n, m;
char buf[Y4M_LINE_MAX+1], buf1[20];
UINT8 *ptr, *ptr1, *ptr2;
/* construct stream header, if this is the first frame */
if(need_stream_header) {
n = snprintf(buf, sizeof(buf), "%s W%d H%d F%d:%d I%s A%d:%d\n",
Y4M_MAGIC,
width,
height,
raten, rated,
"p", /* ffmpeg seems to only output progressive video */
aspectn, aspectd);
if (n < 0) {
fprintf(stderr, "Error. YUV4MPEG stream header write failed.\n");
} else {
fprintf(stderr, "YUV4MPEG stream header written. FPS is %d\n", raten);
put_buffer(pb, buf, strlen(buf));
}
}
/* construct frame header */
m = snprintf(buf1, sizeof(buf1), "%s \n", Y4M_FRAME_MAGIC);
if (m < 0) {
fprintf(stderr, "Error. YUV4MPEG frame header write failed.\n");
} else {
/* fprintf(stderr, "YUV4MPEG frame header written.\n"); */
put_buffer(pb, buf1, strlen(buf1));
}
ptr = picture->data[0];
for(i=0;i<height;i++) {
put_buffer(pb, ptr, width);
ptr += picture->linesize[0];
}
if (is_yuv) {
height >>= 1;
width >>= 1;
ptr1 = picture->data[1];
ptr2 = picture->data[2];
for(i=0;i<height;i++) { /* Cb */
put_buffer(pb, ptr1, width);
ptr1 += picture->linesize[1];
}
for(i=0;i<height;i++) { /* Cr */
put_buffer(pb, ptr2, width);
ptr2 += picture->linesize[2];
}
}
put_flush_packet(pb);
return 0;
}
static int img_write_header(AVFormatContext *s)
{
VideoData *img = s->priv_data;
@ -506,6 +571,9 @@ static int img_write_header(AVFormatContext *s)
} else if (s->oformat == &ppmpipe_oformat ||
s->oformat == &ppm_oformat) {
img->img_fmt = IMGFMT_PPM;
} else if (s->oformat == &yuv4mpegpipe_oformat) {
img->img_fmt = IMGFMT_YUV4MPEG;
img->header_written = 0;
} else {
goto fail;
}
@ -522,12 +590,65 @@ static int img_write_packet(AVFormatContext *s, int stream_index,
AVStream *st = s->streams[stream_index];
ByteIOContext pb1, *pb;
AVPicture picture;
int width, height, ret, size1;
int width, height, need_stream_header, ret, size1, raten, rated, aspectn, aspectd, fps, fps1;
char filename[1024];
width = st->codec.width;
height = st->codec.height;
if (img->img_number == 1) {
need_stream_header = 1;
} else {
need_stream_header = 0;
}
fps = st->codec.frame_rate;
fps1 = (((float)fps / FRAME_RATE_BASE) * 1000);
/* Sorry about this messy code, but mpeg2enc is very picky about
* the framerates it accepts. */
switch(fps1) {
case 23976:
raten = 24000; /* turn the framerate into a ratio */
rated = 1001;
break;
case 29970:
raten = 30000;
rated = 1001;
break;
case 25000:
raten = 25;
rated = 1;
break;
case 30000:
raten = 30;
rated = 1;
break;
case 24000:
raten = 24;
rated = 1;
break;
case 50000:
raten = 50;
rated = 1;
break;
case 59940:
raten = 60000;
rated = 1001;
break;
case 60000:
raten = 60;
rated = 1;
break;
default:
raten = fps1; /* this setting should work, but often doesn't */
rated = 1000;
break;
}
aspectn = 1;
aspectd = 1; /* ffmpeg always uses a 1:1 aspect ratio */
switch(st->codec.pix_fmt) {
case PIX_FMT_YUV420P:
size1 = (width * height * 3) / 2;
@ -580,6 +701,10 @@ static int img_write_packet(AVFormatContext *s, int stream_index,
case IMGFMT_PPM:
ret = ppm_save(&picture, width, height, pb);
break;
case IMGFMT_YUV4MPEG:
ret = yuv4mpeg_save(&picture, width, height, pb,
need_stream_header, 1, raten, rated, aspectn, aspectd);
break;
}
if (!img->is_pipe) {
url_fclose(pb);
@ -776,6 +901,20 @@ AVOutputFormat ppmpipe_oformat = {
};
AVOutputFormat yuv4mpegpipe_oformat = {
"yuv4mpegpipe",
"YUV4MPEG pipe format",
"",
"yuv4mpeg",
sizeof(VideoData),
CODEC_ID_NONE,
CODEC_ID_RAWVIDEO,
img_write_header,
img_write_packet,
img_write_trailer,
};
int img_init(void)
{
av_register_input_format(&pgm_iformat);
@ -798,5 +937,8 @@ int img_init(void)
av_register_input_format(&ppmpipe_iformat);
av_register_output_format(&ppmpipe_oformat);
av_register_output_format(&yuv4mpegpipe_oformat);
return 0;
}