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jpegenc: Accept grayscale as input

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Adds video/x-raw-grayscale (8 bit) support to jpegenc
This commit is contained in:
Thiago Santos 2010-05-18 01:57:14 -03:00
parent 01abf5b94e
commit d7a25fd109
1 changed files with 15 additions and 11 deletions
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26
ext/jpeg/gstjpegenc.c
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@ -123,7 +123,8 @@ GST_STATIC_PAD_TEMPLATE ("sink",
("{ I420, YV12, YUY2, UYVY, Y41B, Y42B, YVYU, Y444 }") "; "
GST_VIDEO_CAPS_RGB "; " GST_VIDEO_CAPS_BGR "; "
GST_VIDEO_CAPS_RGBx "; " GST_VIDEO_CAPS_xRGB "; "
GST_VIDEO_CAPS_BGRx "; " GST_VIDEO_CAPS_xBGR)
GST_VIDEO_CAPS_BGRx "; " GST_VIDEO_CAPS_xBGR "; "
GST_VIDEO_CAPS_GRAY8)
);
/* *INDENT-ON* */
@ -415,7 +416,10 @@ gst_jpegenc_setcaps (GstPad * pad, GstCaps * caps)
/* prepare a cached image description */
enc->channels = 3 + (gst_video_format_has_alpha (format) ? 1 : 0);
/* ... but any alpha is disregarded in encoding */
enc->channels = 3;
if (gst_video_format_is_gray (format))
enc->channels = 1;
else
enc->channels = 3;
enc->h_max_samp = 0;
enc->v_max_samp = 0;
for (i = 0; i < enc->channels; ++i) {
@ -481,7 +485,7 @@ gst_jpegenc_resync (GstJpegEnc * jpegenc)
jpegenc->cinfo.image_width = width = jpegenc->width;
jpegenc->cinfo.image_height = height = jpegenc->height;
jpegenc->cinfo.input_components = 3;
jpegenc->cinfo.input_components = jpegenc->channels;
GST_DEBUG_OBJECT (jpegenc, "width %d, height %d", width, height);
GST_DEBUG_OBJECT (jpegenc, "format %d", jpegenc->format);
@ -489,6 +493,9 @@ gst_jpegenc_resync (GstJpegEnc * jpegenc)
if (gst_video_format_is_rgb (jpegenc->format)) {
GST_DEBUG_OBJECT (jpegenc, "RGB");
jpegenc->cinfo.in_color_space = JCS_RGB;
} else if (gst_video_format_is_gray (jpegenc->format)) {
GST_DEBUG_OBJECT (jpegenc, "gray");
jpegenc->cinfo.in_color_space = JCS_GRAYSCALE;
} else {
GST_DEBUG_OBJECT (jpegenc, "YUV");
jpegenc->cinfo.in_color_space = JCS_YCbCr;
@ -505,7 +512,7 @@ gst_jpegenc_resync (GstJpegEnc * jpegenc)
GST_DEBUG_OBJECT (jpegenc, "h_max_samp=%d, v_max_samp=%d",
jpegenc->h_max_samp, jpegenc->v_max_samp);
/* image dimension info */
for (i = 0; i < 3; i++) {
for (i = 0; i < jpegenc->channels; i++) {
GST_DEBUG_OBJECT (jpegenc, "comp %i: h_samp=%d, v_samp=%d", i,
jpegenc->h_samp[i], jpegenc->v_samp[i]);
jpegenc->cinfo.comp_info[i].h_samp_factor = jpegenc->h_samp[i];
@ -564,13 +571,10 @@ gst_jpegenc_chain (GstPad * pad, GstBuffer * buf)
width = jpegenc->width;
height = jpegenc->height;
base[0] = data + jpegenc->offset[0];
base[1] = data + jpegenc->offset[1];
base[2] = data + jpegenc->offset[2];
end[0] = base[0] + jpegenc->cheight[0] * jpegenc->stride[0];
end[1] = base[1] + jpegenc->cheight[1] * jpegenc->stride[1];
end[2] = base[2] + jpegenc->cheight[2] * jpegenc->stride[2];
for (i = 0; i < jpegenc->channels; i++) {
base[i] = data + jpegenc->offset[i];
end[i] = base[i] + jpegenc->cheight[i] * jpegenc->stride[i];
}
jpegenc->jdest.next_output_byte = GST_BUFFER_DATA (jpegenc->output_buffer);
jpegenc->jdest.free_in_buffer = GST_BUFFER_SIZE (jpegenc->output_buffer);