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picture utils

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Originally committed as revision 72 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Fabrice Bellard 2001-08-11 19:04:31 +00:00
parent 0ee50938f1
commit cf0875950d
1 changed files with 97 additions and 0 deletions
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97
libavcodec/utils.c
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@ -174,6 +174,15 @@ AVCodec *avcodec_find(enum CodecID id)
return NULL;
}
const char *pix_fmt_str[] = {
"yuv420p",
"yuv422",
"rgb24",
"bgr24",
"yuv422p",
"yuv444p",
};
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
{
const char *codec_name;
@ -208,6 +217,11 @@ void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
snprintf(buf, buf_size,
"Video: %s%s",
codec_name, enc->flags & CODEC_FLAG_HQ ? " (hq)" : "");
if (enc->codec_id == CODEC_ID_RAWVIDEO) {
snprintf(buf + strlen(buf), buf_size - strlen(buf),
", %s",
pix_fmt_str[enc->pix_fmt]);
}
if (enc->width) {
snprintf(buf + strlen(buf), buf_size - strlen(buf),
", %dx%d, %0.2f fps",
@ -235,6 +249,89 @@ void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
}
}
/* Picture field are filled with 'ptr' addresses */
void avpicture_fill(AVPicture *picture, UINT8 *ptr,
int pix_fmt, int width, int height)
{
int size;
size = width * height;
switch(pix_fmt) {
case PIX_FMT_YUV420P:
picture->data[0] = ptr;
picture->data[1] = picture->data[0] + size;
picture->data[2] = picture->data[1] + size / 4;
picture->linesize[0] = width;
picture->linesize[1] = width / 2;
picture->linesize[2] = width / 2;
break;
case PIX_FMT_YUV422P:
picture->data[0] = ptr;
picture->data[1] = picture->data[0] + size;
picture->data[2] = picture->data[1] + size / 2;
picture->linesize[0] = width;
picture->linesize[1] = width / 2;
picture->linesize[2] = width / 2;
break;
case PIX_FMT_YUV444P:
picture->data[0] = ptr;
picture->data[1] = picture->data[0] + size;
picture->data[2] = picture->data[1] + size;
picture->linesize[0] = width;
picture->linesize[1] = width;
picture->linesize[2] = width;
break;
case PIX_FMT_RGB24:
case PIX_FMT_BGR24:
picture->data[0] = ptr;
picture->data[1] = NULL;
picture->data[2] = NULL;
picture->linesize[0] = width * 3;
break;
case PIX_FMT_YUV422:
picture->data[0] = ptr;
picture->data[1] = NULL;
picture->data[2] = NULL;
picture->linesize[0] = width * 2;
break;
default:
picture->data[0] = NULL;
picture->data[1] = NULL;
picture->data[2] = NULL;
break;
}
}
int avpicture_get_size(int pix_fmt, int width, int height)
{
int size;
size = width * height;
switch(pix_fmt) {
case PIX_FMT_YUV420P:
size = (size * 3) / 2;
break;
case PIX_FMT_YUV422P:
size = (size * 2);
break;
case PIX_FMT_YUV444P:
size = (size * 3);
break;
case PIX_FMT_RGB24:
case PIX_FMT_BGR24:
size = (size * 3);
break;
case PIX_FMT_YUV422:
size = (size * 2);
break;
default:
size = -1;
break;
}
return size;
}
/* must be called before any other functions */
void avcodec_init(void)
{