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add support for yuva420p colorspace (yuv420p + alpha) 

Originally committed as revision 10565 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Aurelien Jacobs 2007-09-24 13:21:41 +00:00
parent 1136d34a44
commit b70335a28d
3 changed files with 44 additions and 5 deletions
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36
libavcodec/imgconvert.c
View File

@ -129,6 +129,16 @@ static const PixFmtInfo pix_fmt_info[PIX_FMT_NB] = {
.x_chroma_shift = 0, .y_chroma_shift = 1,
},
/* YUV formats with alpha plane */
[PIX_FMT_YUVA420P] = {
.name = "yuva420p",
.nb_channels = 4,
.color_type = FF_COLOR_YUV,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 8,
.x_chroma_shift = 1, .y_chroma_shift = 1,
},
/* JPEG YUV */
[PIX_FMT_YUVJ420P] = {
.name = "yuvj420p",
@ -444,10 +454,25 @@ int avpicture_fill(AVPicture *picture, uint8_t *ptr,
picture->data[0] = ptr;
picture->data[1] = picture->data[0] + size;
picture->data[2] = picture->data[1] + size2;
picture->data[3] = NULL;
picture->linesize[0] = width;
picture->linesize[1] = w2;
picture->linesize[2] = w2;
picture->linesize[3] = 0;
return size + 2 * size2;
case PIX_FMT_YUVA420P:
w2 = (width + (1 << pinfo->x_chroma_shift) - 1) >> pinfo->x_chroma_shift;
h2 = (height + (1 << pinfo->y_chroma_shift) - 1) >> pinfo->y_chroma_shift;
size2 = w2 * h2;
picture->data[0] = ptr;
picture->data[1] = picture->data[0] + size;
picture->data[2] = picture->data[1] + size2;
picture->data[3] = picture->data[1] + size2 + size2;
picture->linesize[0] = width;
picture->linesize[1] = w2;
picture->linesize[2] = w2;
picture->linesize[3] = width;
return 2 * size + 2 * size2;
case PIX_FMT_NV12:
case PIX_FMT_NV21:
w2 = (width + (1 << pinfo->x_chroma_shift) - 1) >> pinfo->x_chroma_shift;
@ -456,15 +481,18 @@ int avpicture_fill(AVPicture *picture, uint8_t *ptr,
picture->data[0] = ptr;
picture->data[1] = picture->data[0] + size;
picture->data[2] = NULL;
picture->data[3] = NULL;
picture->linesize[0] = width;
picture->linesize[1] = w2;
picture->linesize[2] = 0;
picture->linesize[3] = 0;
return size + 2 * size2;
case PIX_FMT_RGB24:
case PIX_FMT_BGR24:
picture->data[0] = ptr;
picture->data[1] = NULL;
picture->data[2] = NULL;
picture->data[3] = NULL;
picture->linesize[0] = width * 3;
return size * 3;
case PIX_FMT_RGB32:
@ -474,6 +502,7 @@ int avpicture_fill(AVPicture *picture, uint8_t *ptr,
picture->data[0] = ptr;
picture->data[1] = NULL;
picture->data[2] = NULL;
picture->data[3] = NULL;
picture->linesize[0] = width * 4;
return size * 4;
case PIX_FMT_GRAY16BE:
@ -486,18 +515,21 @@ int avpicture_fill(AVPicture *picture, uint8_t *ptr,
picture->data[0] = ptr;
picture->data[1] = NULL;
picture->data[2] = NULL;
picture->data[3] = NULL;
picture->linesize[0] = width * 2;
return size * 2;
case PIX_FMT_UYVY422:
picture->data[0] = ptr;
picture->data[1] = NULL;
picture->data[2] = NULL;
picture->data[3] = NULL;
picture->linesize[0] = width * 2;
return size * 2;
case PIX_FMT_UYYVYY411:
picture->data[0] = ptr;
picture->data[1] = NULL;
picture->data[2] = NULL;
picture->data[3] = NULL;
picture->linesize[0] = width + width/2;
return size + size/2;
case PIX_FMT_RGB8:
@ -508,6 +540,7 @@ int avpicture_fill(AVPicture *picture, uint8_t *ptr,
picture->data[0] = ptr;
picture->data[1] = NULL;
picture->data[2] = NULL;
picture->data[3] = NULL;
picture->linesize[0] = width;
return size;
case PIX_FMT_RGB4:
@ -515,6 +548,7 @@ int avpicture_fill(AVPicture *picture, uint8_t *ptr,
picture->data[0] = ptr;
picture->data[1] = NULL;
picture->data[2] = NULL;
picture->data[3] = NULL;
picture->linesize[0] = width / 2;
return size / 2;
case PIX_FMT_MONOWHITE:
@ -522,6 +556,7 @@ int avpicture_fill(AVPicture *picture, uint8_t *ptr,
picture->data[0] = ptr;
picture->data[1] = NULL;
picture->data[2] = NULL;
picture->data[3] = NULL;
picture->linesize[0] = (width + 7) >> 3;
return picture->linesize[0] * height;
case PIX_FMT_PAL8:
@ -529,6 +564,7 @@ int avpicture_fill(AVPicture *picture, uint8_t *ptr,
picture->data[0] = ptr;
picture->data[1] = ptr + size2; /* palette is stored here as 256 32 bit words */
picture->data[2] = NULL;
picture->data[3] = NULL;
picture->linesize[0] = width;
picture->linesize[1] = 4;
return size2 + 256 * 4;

12
libavcodec/utils.c
View File

@ -171,6 +171,7 @@ void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
case PIX_FMT_YUVJ420P:
case PIX_FMT_YUVJ422P:
case PIX_FMT_YUVJ444P:
case PIX_FMT_YUVA420P:
w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
h_align= 16;
break;
@ -265,7 +266,7 @@ int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
buf->last_pic_num= *picture_number;
}else{
int h_chroma_shift, v_chroma_shift;
int pixel_size, size[3];
int pixel_size, size[4];
AVPicture picture;
avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
@ -290,16 +291,17 @@ int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
size[1] = avpicture_fill(&picture, NULL, s->pix_fmt, w, h);
size[0] = picture.linesize[0] * h;
size[1] -= size[0];
size[2] = size[3] = 0;
if(picture.data[2])
size[1]= size[2]= size[1]/2;
else
size[2]= 0;
if(picture.data[3])
size[3] = picture.linesize[3] * h;
buf->last_pic_num= -256*256*256*64;
memset(buf->base, 0, sizeof(buf->base));
memset(buf->data, 0, sizeof(buf->data));
for(i=0; i<3 && size[i]; i++){
for(i=0; i<4 && size[i]; i++){
const int h_shift= i==0 ? 0 : h_chroma_shift;
const int v_shift= i==0 ? 0 : v_chroma_shift;
@ -351,7 +353,7 @@ void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
FFSWAP(InternalBuffer, *buf, *last);
for(i=0; i<3; i++){
for(i=0; i<4; i++){
pic->data[i]=NULL;
// pic->base[i]=NULL;
}

1
libavutil/avutil.h
View File

@ -105,6 +105,7 @@ enum PixelFormat {
PIX_FMT_GRAY16LE, ///< Y , 16bpp, little-endian
PIX_FMT_YUV440P, ///< Planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
PIX_FMT_YUVJ440P, ///< Planar YUV 4:4:0 full scale (jpeg)
PIX_FMT_YUVA420P, ///< Planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
PIX_FMT_NB, ///< number of pixel formats, DO NOT USE THIS if you want to link with shared libav* because the number of formats might differ between versions
};