static GstFlowReturn
daala_handle_comment_packet (GstDaalaDec * dec, ogg_packet * packet)
{
gchar *encoder = NULL;
GstTagList *list;
GST_DEBUG_OBJECT (dec, "parsing comment packet");
list =
gst_tag_list_from_vorbiscomment (packet->packet, packet->bytes,
(guint8 *) "\201daala", 6, &encoder);
if (!list) {
GST_ERROR_OBJECT (dec, "couldn't decode comments");
list = gst_tag_list_new_empty ();
}
if (encoder) {
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
GST_TAG_ENCODER, encoder, NULL);
g_free (encoder);
}
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
GST_TAG_ENCODER_VERSION, dec->info.version_major,
GST_TAG_VIDEO_CODEC, "Daala", NULL);
gst_video_decoder_merge_tags (GST_VIDEO_DECODER (dec),
list, GST_TAG_MERGE_REPLACE);
gst_tag_list_unref (list);
return GST_FLOW_OK;
}
static GstFlowReturn
gst_pngdec_caps_create_and_set (GstPngDec * pngdec)
{
GstFlowReturn ret = GST_FLOW_OK;
gint bpc = 0, color_type;
png_uint_32 width, height;
GstVideoFormat format = GST_VIDEO_FORMAT_UNKNOWN;
g_return_val_if_fail (GST_IS_PNGDEC (pngdec), GST_FLOW_ERROR);
/* Get bits per channel */
bpc = png_get_bit_depth (pngdec->png, pngdec->info);
/* Get Color type */
color_type = png_get_color_type (pngdec->png, pngdec->info);
/* Add alpha channel if 16-bit depth, but not for GRAY images */
if ((bpc > 8) && (color_type != PNG_COLOR_TYPE_GRAY)) {
png_set_add_alpha (pngdec->png, 0xffff, PNG_FILLER_BEFORE);
png_set_swap (pngdec->png);
}
#if 0
/* We used to have this HACK to reverse the outgoing bytes, but the problem
* that originally required the hack seems to have been in videoconvert's
* RGBA descriptions. It doesn't seem needed now that's fixed, but might
* still be needed on big-endian systems, I'm not sure. J.S. 6/7/2007 */
if (color_type == PNG_COLOR_TYPE_RGB_ALPHA)
png_set_bgr (pngdec->png);
#endif
/* Gray scale with alpha channel converted to RGB */
if (color_type == PNG_COLOR_TYPE_GRAY_ALPHA) {
GST_LOG_OBJECT (pngdec,
"converting grayscale png with alpha channel to RGB");
png_set_gray_to_rgb (pngdec->png);
}
/* Gray scale converted to upscaled to 8 bits */
if ((color_type == PNG_COLOR_TYPE_GRAY_ALPHA) ||
(color_type == PNG_COLOR_TYPE_GRAY)) {
if (bpc < 8) { /* Convert to 8 bits */
GST_LOG_OBJECT (pngdec, "converting grayscale image to 8 bits");
#if PNG_LIBPNG_VER < 10400
png_set_gray_1_2_4_to_8 (pngdec->png);
#else
png_set_expand_gray_1_2_4_to_8 (pngdec->png);
#endif
}
}
/* Palette converted to RGB */
if (color_type == PNG_COLOR_TYPE_PALETTE) {
GST_LOG_OBJECT (pngdec, "converting palette png to RGB");
png_set_palette_to_rgb (pngdec->png);
}
png_set_interlace_handling (pngdec->png);
/* Update the info structure */
png_read_update_info (pngdec->png, pngdec->info);
/* Get IHDR header again after transformation settings */
png_get_IHDR (pngdec->png, pngdec->info, &width, &height,
&bpc, &pngdec->color_type, NULL, NULL, NULL);
GST_LOG_OBJECT (pngdec, "this is a %dx%d PNG image", (gint) width,
(gint) height);
switch (pngdec->color_type) {
case PNG_COLOR_TYPE_RGB:
GST_LOG_OBJECT (pngdec, "we have no alpha channel, depth is 24 bits");
if (bpc == 8)
format = GST_VIDEO_FORMAT_RGB;
break;
case PNG_COLOR_TYPE_RGB_ALPHA:
GST_LOG_OBJECT (pngdec,
"we have an alpha channel, depth is 32 or 64 bits");
if (bpc == 8)
format = GST_VIDEO_FORMAT_RGBA;
else if (bpc == 16)
format = GST_VIDEO_FORMAT_ARGB64;
break;
case PNG_COLOR_TYPE_GRAY:
GST_LOG_OBJECT (pngdec,
"We have an gray image, depth is 8 or 16 (be) bits");
if (bpc == 8)
format = GST_VIDEO_FORMAT_GRAY8;
else if (bpc == 16)
format = GST_VIDEO_FORMAT_GRAY16_BE;
break;
default:
break;
}
if (format == GST_VIDEO_FORMAT_UNKNOWN) {
GST_ELEMENT_ERROR (pngdec, STREAM, NOT_IMPLEMENTED, (NULL),
("pngdec does not support this color type"));
ret = GST_FLOW_NOT_SUPPORTED;
goto beach;
}
/* Check if output state changed */
if (pngdec->output_state) {
GstVideoInfo *info = &pngdec->output_state->info;
if (width == GST_VIDEO_INFO_WIDTH (info) &&
height == GST_VIDEO_INFO_HEIGHT (info) &&
GST_VIDEO_INFO_FORMAT (info) == format) {
goto beach;
}
gst_video_codec_state_unref (pngdec->output_state);
}
#ifdef HAVE_LIBPNG_1_5
if ((pngdec->color_type & PNG_COLOR_MASK_COLOR)
&& !(pngdec->color_type & PNG_COLOR_MASK_PALETTE)
&& png_get_valid (pngdec->png, pngdec->info, PNG_INFO_iCCP)) {
png_charp icc_name;
png_bytep icc_profile;
int icc_compression_type;
png_uint_32 icc_proflen = 0;
png_uint_32 ret = png_get_iCCP (pngdec->png, pngdec->info, &icc_name,
&icc_compression_type, &icc_profile, &icc_proflen);
if ((ret & PNG_INFO_iCCP)) {
gpointer gst_icc_prof = g_memdup (icc_profile, icc_proflen);
GstBuffer *tagbuffer = NULL;
GstSample *tagsample = NULL;
GstTagList *taglist = NULL;
GstStructure *info = NULL;
GstCaps *caps;
GST_DEBUG_OBJECT (pngdec, "extracted ICC profile '%s' length=%i",
icc_name, (guint32) icc_proflen);
tagbuffer = gst_buffer_new_wrapped (gst_icc_prof, icc_proflen);
caps = gst_caps_new_empty_simple ("application/vnd.iccprofile");
info = gst_structure_new_empty ("application/vnd.iccprofile");
if (icc_name)
gst_structure_set (info, "icc-name", G_TYPE_STRING, icc_name, NULL);
tagsample = gst_sample_new (tagbuffer, caps, NULL, info);
gst_buffer_unref (tagbuffer);
gst_caps_unref (caps);
taglist = gst_tag_list_new_empty ();
gst_tag_list_add (taglist, GST_TAG_MERGE_APPEND, GST_TAG_ATTACHMENT,
tagsample, NULL);
gst_sample_unref (tagsample);
gst_video_decoder_merge_tags (GST_VIDEO_DECODER (pngdec), taglist,
GST_TAG_MERGE_APPEND);
gst_tag_list_unref (taglist);
}
}
#endif
pngdec->output_state =
gst_video_decoder_set_output_state (GST_VIDEO_DECODER (pngdec), format,
width, height, pngdec->input_state);
gst_video_decoder_negotiate (GST_VIDEO_DECODER (pngdec));
GST_DEBUG ("Final %d %d", GST_VIDEO_INFO_WIDTH (&pngdec->output_state->info),
GST_VIDEO_INFO_HEIGHT (&pngdec->output_state->info));
beach:
return ret;
}
