static void
parse_exif_rational_tag (GstExifReader * exif_reader,
const gchar * gst_tag, guint32 count, guint32 offset, gdouble multiplier)
{
GstByteReader data_reader;
guint32 real_offset;
guint32 frac_n = 0;
guint32 frac_d = 1;
gdouble value;
if (count > 1) {
GST_WARNING ("Rationals with multiple entries are not supported");
}
if (offset < exif_reader->base_offset) {
GST_WARNING ("Offset is smaller (%u) than base offset (%u)", offset,
exif_reader->base_offset);
return;
}
real_offset = offset - exif_reader->base_offset;
if (real_offset >= GST_BUFFER_SIZE (exif_reader->buffer)) {
GST_WARNING ("Invalid offset %u for buffer of size %u, not adding tag %s",
real_offset, GST_BUFFER_SIZE (exif_reader->buffer), gst_tag);
return;
}
gst_byte_reader_init_from_buffer (&data_reader, exif_reader->buffer);
if (!gst_byte_reader_set_pos (&data_reader, real_offset))
goto reader_fail;
if (exif_reader->byte_order == G_LITTLE_ENDIAN) {
if (!gst_byte_reader_get_uint32_le (&data_reader, &frac_n) ||
!gst_byte_reader_get_uint32_le (&data_reader, &frac_d))
goto reader_fail;
} else {
if (!gst_byte_reader_get_uint32_be (&data_reader, &frac_n) ||
!gst_byte_reader_get_uint32_be (&data_reader, &frac_d))
goto reader_fail;
}
GST_DEBUG ("Read fraction for tag %s: %u/%u", gst_tag, frac_n, frac_d);
gst_util_fraction_to_double (frac_n, frac_d, &value);
value *= multiplier;
GST_DEBUG ("Adding %s tag: %lf", gst_tag, value);
gst_tag_list_add (exif_reader->taglist, GST_TAG_MERGE_REPLACE, gst_tag, value,
NULL);
return;
reader_fail:
GST_WARNING ("Failed to read from byte reader. (Buffer too short?)");
}
static gboolean
parse_exif_tag_header (GstByteReader * reader, gint byte_order,
GstExifTagData * _tagdata)
{
g_assert (_tagdata);
/* read the fields */
if (byte_order == G_LITTLE_ENDIAN) {
if (!gst_byte_reader_get_uint16_le (reader, &_tagdata->tag) ||
!gst_byte_reader_get_uint16_le (reader, &_tagdata->tag_type) ||
!gst_byte_reader_get_uint32_le (reader, &_tagdata->count) ||
!gst_byte_reader_get_data (reader, 4, &_tagdata->offset_as_data)) {
return FALSE;
}
_tagdata->offset = GST_READ_UINT32_LE (_tagdata->offset_as_data);
} else {
if (!gst_byte_reader_get_uint16_be (reader, &_tagdata->tag) ||
!gst_byte_reader_get_uint16_be (reader, &_tagdata->tag_type) ||
!gst_byte_reader_get_uint32_be (reader, &_tagdata->count) ||
!gst_byte_reader_get_data (reader, 4, &_tagdata->offset_as_data)) {
return FALSE;
}
_tagdata->offset = GST_READ_UINT32_BE (_tagdata->offset_as_data);
}
return TRUE;
}
/**
* gst_tag_list_from_exif_buffer_with_tiff_header:
* @buffer: The exif buffer
*
* Parses the exif tags starting with a tiff header structure.
*
* Returns: The taglist
*
* Since: 0.10.30
*/
GstTagList *
gst_tag_list_from_exif_buffer_with_tiff_header (const GstBuffer * buffer)
{
GstByteReader reader;
guint16 fortytwo = 42;
guint16 endianness = 0;
guint32 offset;
GstTagList *taglist = NULL;
GstBuffer *subbuffer;
GST_LOG ("Parsing exif tags with tiff header of size %u",
GST_BUFFER_SIZE (buffer));
gst_byte_reader_init_from_buffer (&reader, buffer);
GST_LOG ("Parsing the tiff header");
if (!gst_byte_reader_get_uint16_be (&reader, &endianness)) {
goto byte_reader_fail;
}
if (endianness == TIFF_LITTLE_ENDIAN) {
if (!gst_byte_reader_get_uint16_le (&reader, &fortytwo) ||
!gst_byte_reader_get_uint32_le (&reader, &offset))
goto byte_reader_fail;
} else if (endianness == TIFF_BIG_ENDIAN) {
if (!gst_byte_reader_get_uint16_be (&reader, &fortytwo) ||
!gst_byte_reader_get_uint32_be (&reader, &offset))
goto byte_reader_fail;
} else {
GST_WARNING ("Invalid endianness number %u", endianness);
return NULL;
}
if (fortytwo != 42) {
GST_WARNING ("Invalid magic number %u, should be 42", fortytwo);
return NULL;
}
subbuffer = gst_buffer_new_and_alloc (GST_BUFFER_SIZE (buffer) -
(TIFF_HEADER_SIZE - 2));
memcpy (GST_BUFFER_DATA (subbuffer),
GST_BUFFER_DATA (buffer) + TIFF_HEADER_SIZE,
GST_BUFFER_SIZE (buffer) - TIFF_HEADER_SIZE);
taglist = gst_tag_list_from_exif_buffer (subbuffer,
endianness == TIFF_LITTLE_ENDIAN ? G_LITTLE_ENDIAN : G_BIG_ENDIAN, 8);
gst_buffer_unref (subbuffer);
return taglist;
byte_reader_fail:
{
GST_WARNING ("Failed to read values from buffer");
return NULL;
}
}
static GstFlowReturn
gst_png_parse_handle_frame (GstBaseParse * parse,
GstBaseParseFrame * frame, gint * skipsize)
{
GstPngParse *pngparse = GST_PNG_PARSE (parse);
GstMapInfo map;
GstByteReader reader;
GstFlowReturn ret = GST_FLOW_OK;
guint64 signature;
guint width = 0, height = 0;
gst_buffer_map (frame->buffer, &map, GST_MAP_READ);
gst_byte_reader_init (&reader, map.data, map.size);
if (!gst_byte_reader_peek_uint64_be (&reader, &signature))
goto beach;
if (signature != PNG_SIGNATURE) {
for (;;) {
guint offset;
offset = gst_byte_reader_masked_scan_uint32 (&reader, 0xffffffff,
0x89504E47, 0, gst_byte_reader_get_remaining (&reader));
if (offset == -1) {
*skipsize = gst_byte_reader_get_remaining (&reader) - 4;
goto beach;
}
gst_byte_reader_skip (&reader, offset);
if (!gst_byte_reader_peek_uint64_be (&reader, &signature))
goto beach;
if (signature == PNG_SIGNATURE) {
/* We're skipping, go out, we'll be back */
*skipsize = gst_byte_reader_get_pos (&reader);
goto beach;
}
gst_byte_reader_skip (&reader, 4);
}
}
gst_byte_reader_skip (&reader, 8);
for (;;) {
guint32 length;
guint32 code;
if (!gst_byte_reader_get_uint32_be (&reader, &length))
goto beach;
if (!gst_byte_reader_get_uint32_le (&reader, &code))
goto beach;
GST_TRACE_OBJECT (parse, "%" GST_FOURCC_FORMAT " chunk, %u bytes",
GST_FOURCC_ARGS (code), length);
if (code == GST_MAKE_FOURCC ('I', 'H', 'D', 'R')) {
if (!gst_byte_reader_get_uint32_be (&reader, &width))
goto beach;
if (!gst_byte_reader_get_uint32_be (&reader, &height))
goto beach;
length -= 8;
} else if (code == GST_MAKE_FOURCC ('I', 'D', 'A', 'T')) {
gst_base_parse_set_min_frame_size (parse,
gst_byte_reader_get_pos (&reader) + 4 + length + 12);
}
if (!gst_byte_reader_skip (&reader, length + 4))
goto beach;
if (code == GST_MAKE_FOURCC ('I', 'E', 'N', 'D')) {
/* the start code and at least 2 empty frames (IHDR and IEND) */
gst_base_parse_set_min_frame_size (parse, 8 + 12 + 12);
if (pngparse->width != width || pngparse->height != height) {
GstCaps *caps, *sink_caps;
pngparse->height = height;
pngparse->width = width;
caps = gst_caps_new_simple ("image/png",
"width", G_TYPE_INT, width, "height", G_TYPE_INT, height, NULL);
sink_caps =
gst_pad_get_current_caps (GST_BASE_PARSE_SINK_PAD (pngparse));
if (sink_caps) {
GstStructure *st;
gint fr_num, fr_denom;
st = gst_caps_get_structure (sink_caps, 0);
if (st
&& gst_structure_get_fraction (st, "framerate", &fr_num,
&fr_denom)) {
gst_caps_set_simple (caps,
"framerate", GST_TYPE_FRACTION, fr_num, fr_denom, NULL);
} else {
GST_WARNING_OBJECT (pngparse, "No framerate set");
}
gst_caps_unref (sink_caps);
}
if (!gst_pad_set_caps (GST_BASE_PARSE_SRC_PAD (parse), caps))
ret = GST_FLOW_NOT_NEGOTIATED;
gst_caps_unref (caps);
if (ret != GST_FLOW_OK)
goto beach;
}
gst_buffer_unmap (frame->buffer, &map);
return gst_base_parse_finish_frame (parse, frame,
gst_byte_reader_get_pos (&reader));
}
}
beach:
gst_buffer_unmap (frame->buffer, &map);
return ret;
}
static GstFlowReturn
gst_pngdec_parse (GstVideoDecoder * decoder, GstVideoCodecFrame * frame,
GstAdapter * adapter, gboolean at_eos)
{
gsize toadd = 0;
GstByteReader reader;
gconstpointer data;
guint64 signature;
gsize size;
GstPngDec *pngdec = (GstPngDec *) decoder;
GST_VIDEO_CODEC_FRAME_SET_SYNC_POINT (frame);
/* FIXME : The overhead of using scan_uint32 is massive */
size = gst_adapter_available (adapter);
GST_DEBUG ("Parsing PNG image data (%" G_GSIZE_FORMAT " bytes)", size);
if (size < 8)
goto need_more_data;
data = gst_adapter_map (adapter, size);
gst_byte_reader_init (&reader, data, size);
if (pngdec->read_data == 0) {
if (!gst_byte_reader_peek_uint64_be (&reader, &signature))
goto need_more_data;
if (signature != PNG_SIGNATURE) {
for (;;) {
guint offset;
offset = gst_byte_reader_masked_scan_uint32 (&reader, 0xffffffff,
0x89504E47, 0, gst_byte_reader_get_remaining (&reader));
if (offset == -1) {
gst_adapter_flush (adapter,
gst_byte_reader_get_remaining (&reader) - 4);
goto need_more_data;
}
if (!gst_byte_reader_skip (&reader, offset))
goto need_more_data;
if (!gst_byte_reader_peek_uint64_be (&reader, &signature))
goto need_more_data;
if (signature == PNG_SIGNATURE) {
/* We're skipping, go out, we'll be back */
gst_adapter_flush (adapter, gst_byte_reader_get_pos (&reader));
goto need_more_data;
}
if (!gst_byte_reader_skip (&reader, 4))
goto need_more_data;
}
}
pngdec->read_data = 8;
}
if (!gst_byte_reader_skip (&reader, pngdec->read_data))
goto need_more_data;
for (;;) {
guint32 length;
guint32 code;
if (!gst_byte_reader_get_uint32_be (&reader, &length))
goto need_more_data;
if (!gst_byte_reader_get_uint32_le (&reader, &code))
goto need_more_data;
if (!gst_byte_reader_skip (&reader, length + 4))
goto need_more_data;
if (code == GST_MAKE_FOURCC ('I', 'E', 'N', 'D')) {
/* Have complete frame */
toadd = gst_byte_reader_get_pos (&reader);
GST_DEBUG_OBJECT (decoder, "Have complete frame of size %" G_GSIZE_FORMAT,
toadd);
pngdec->read_data = 0;
goto have_full_frame;
} else
pngdec->read_data += length + 12;
}
g_assert_not_reached ();
return GST_FLOW_ERROR;
need_more_data:
return GST_VIDEO_DECODER_FLOW_NEED_DATA;
have_full_frame:
if (toadd)
gst_video_decoder_add_to_frame (decoder, toadd);
return gst_video_decoder_have_frame (decoder);
}
static gint
deserialize_geo_coordinate (GstExifReader * exif_reader,
GstByteReader * reader, const GstExifTagMatch * exiftag,
GstExifTagData * tagdata)
{
GstByteReader fractions_reader;
gint multiplier;
GstExifTagData next_tagdata;
gint ret = 0;
/* for the conversion */
guint32 degrees_n = 0;
guint32 degrees_d = 1;
guint32 minutes_n = 0;
guint32 minutes_d = 1;
guint32 seconds_n = 0;
guint32 seconds_d = 1;
gdouble degrees;
gdouble minutes;
gdouble seconds;
GST_LOG ("Starting to parse %s tag in exif 0x%x", exiftag->gst_tag,
exiftag->exif_tag);
if (exiftag->complementary_tag != tagdata->tag) {
/* First should come the 'Ref' tags */
GST_WARNING ("Tag %d is not the 'Ref' tag for latitude nor longitude",
tagdata->tag);
return ret;
}
if (tagdata->offset_as_data[0] == 'N' || tagdata->offset_as_data[0] == 'E') {
multiplier = 1;
} else if (tagdata->offset_as_data[0] == 'S'
|| tagdata->offset_as_data[0] == 'W') {
multiplier = -1;
} else {
GST_WARNING ("Invalid LatitudeRef or LongitudeRef %c",
tagdata->offset_as_data[0]);
return ret;
}
/* now read the following tag that must be the latitude or longitude */
if (exif_reader->byte_order == G_LITTLE_ENDIAN) {
if (!gst_byte_reader_peek_uint16_le (reader, &next_tagdata.tag))
goto reader_fail;
} else {
if (!gst_byte_reader_peek_uint16_be (reader, &next_tagdata.tag))
goto reader_fail;
}
if (exiftag->exif_tag != next_tagdata.tag) {
GST_WARNING ("This is not a geo cordinate tag");
return ret;
}
/* read the remaining tag entry data */
if (!parse_exif_tag_header (reader, exif_reader->byte_order, &next_tagdata)) {
ret = -1;
goto reader_fail;
}
ret = 1;
/* some checking */
if (next_tagdata.tag_type != EXIF_TYPE_RATIONAL) {
GST_WARNING ("Invalid type %d for geo coordinate (latitude/longitude)",
next_tagdata.tag_type);
return ret;
}
if (next_tagdata.count != 3) {
GST_WARNING ("Geo coordinate should use 3 fractions, we have %u",
next_tagdata.count);
return ret;
}
/* now parse the fractions */
gst_byte_reader_init_from_buffer (&fractions_reader, exif_reader->buffer);
if (!gst_byte_reader_set_pos (&fractions_reader,
next_tagdata.offset - exif_reader->base_offset))
goto reader_fail;
if (exif_reader->byte_order == G_LITTLE_ENDIAN) {
if (!gst_byte_reader_get_uint32_le (&fractions_reader, °rees_n) ||
!gst_byte_reader_get_uint32_le (&fractions_reader, °rees_d) ||
!gst_byte_reader_get_uint32_le (&fractions_reader, &minutes_n) ||
!gst_byte_reader_get_uint32_le (&fractions_reader, &minutes_d) ||
!gst_byte_reader_get_uint32_le (&fractions_reader, &seconds_n) ||
!gst_byte_reader_get_uint32_le (&fractions_reader, &seconds_d))
goto reader_fail;
} else {
if (!gst_byte_reader_get_uint32_be (&fractions_reader, °rees_n) ||
!gst_byte_reader_get_uint32_be (&fractions_reader, °rees_d) ||
!gst_byte_reader_get_uint32_be (&fractions_reader, &minutes_n) ||
!gst_byte_reader_get_uint32_be (&fractions_reader, &minutes_d) ||
!gst_byte_reader_get_uint32_be (&fractions_reader, &seconds_n) ||
!gst_byte_reader_get_uint32_be (&fractions_reader, &seconds_d))
goto reader_fail;
}
GST_DEBUG ("Read degrees fraction for tag %s: %u/%u %u/%u %u/%u",
exiftag->gst_tag, degrees_n, degrees_d, minutes_n, minutes_d,
seconds_n, seconds_d);
gst_util_fraction_to_double (degrees_n, degrees_d, °rees);
gst_util_fraction_to_double (minutes_n, minutes_d, &minutes);
gst_util_fraction_to_double (seconds_n, seconds_d, &seconds);
minutes += seconds / 60;
degrees += minutes / 60;
degrees *= multiplier;
GST_DEBUG ("Adding %s tag: %lf", exiftag->gst_tag, degrees);
gst_tag_list_add (exif_reader->taglist, GST_TAG_MERGE_REPLACE,
exiftag->gst_tag, degrees, NULL);
return ret;
reader_fail:
GST_WARNING ("Failed to read fields from buffer (too short?)");
return ret;
}
static void
gst_exif_tag_rewrite_offsets (GstExifWriter * writer, guint32 base_offset)
{
guint32 offset;
GST_LOG ("Rewriting tag entries offsets");
offset = gst_byte_writer_get_size (&writer->tagwriter);
while (gst_byte_writer_get_pos (&writer->tagwriter) <
gst_byte_writer_get_size (&writer->tagwriter)) {
guint16 type = 0;
guint32 cur_offset = 0;
GstByteReader *reader;
gint byte_size = 0;
guint32 count = 0;
guint16 tag_id = 0;
reader = (GstByteReader *) & writer->tagwriter;
/* read the type */
if (writer->byte_order == G_LITTLE_ENDIAN) {
if (!gst_byte_reader_get_uint16_le (reader, &tag_id))
break;
if (!gst_byte_reader_get_uint16_le (reader, &type))
break;
if (!gst_byte_reader_get_uint32_le (reader, &count))
break;
} else {
if (!gst_byte_reader_get_uint16_be (reader, &tag_id))
break;
if (!gst_byte_reader_get_uint16_be (reader, &type))
break;
if (!gst_byte_reader_get_uint32_be (reader, &count))
break;
}
switch (type) {
case EXIF_TYPE_BYTE:
case EXIF_TYPE_ASCII:
case EXIF_TYPE_UNDEFINED:
byte_size = count;
break;
case EXIF_TYPE_SHORT:
byte_size = count * 2; /* 2 bytes */
break;
case EXIF_TYPE_LONG:
case EXIF_TYPE_SLONG:
byte_size = count * 4; /* 4 bytes */
break;
case EXIF_TYPE_RATIONAL:
case EXIF_TYPE_SRATIONAL:
byte_size = count * 8; /* 8 bytes */
break;
default:
g_assert_not_reached ();
break;
}
/* adjust the offset if needed */
if (byte_size > 4 || tag_id == EXIF_GPS_IFD_TAG) {
if (writer->byte_order == G_LITTLE_ENDIAN) {
if (gst_byte_reader_peek_uint32_le (reader, &cur_offset)) {
gst_byte_writer_put_uint32_le (&writer->tagwriter,
cur_offset + offset + base_offset);
}
} else {
if (gst_byte_reader_peek_uint32_be (reader, &cur_offset)) {
gst_byte_writer_put_uint32_be (&writer->tagwriter,
cur_offset + offset + base_offset);
}
}
GST_DEBUG ("Rewriting tag offset from %u to (%u + %u + %u) %u",
cur_offset, cur_offset, offset, base_offset,
cur_offset + offset + base_offset);
} else {
gst_byte_reader_skip (reader, 4);
GST_DEBUG ("No need to rewrite tag offset");
}
}
}
static GstFlowReturn
gst_png_parse_handle_frame (GstBaseParse * parse,
GstBaseParseFrame * frame, gint * skipsize)
{
GstPngParse *pngparse = GST_PNG_PARSE (parse);
GstMapInfo map;
GstByteReader reader;
GstFlowReturn ret = GST_FLOW_OK;
guint64 signature;
guint width = 0, height = 0;
gst_buffer_map (frame->buffer, &map, GST_MAP_READ);
gst_byte_reader_init (&reader, map.data, map.size);
if (!gst_byte_reader_peek_uint64_be (&reader, &signature))
goto beach;
if (signature != PNG_SIGNATURE) {
for (;;) {
guint offset;
offset = gst_byte_reader_masked_scan_uint32 (&reader, 0xffffffff,
0x89504E47, 0, gst_byte_reader_get_remaining (&reader));
if (offset == -1) {
*skipsize = gst_byte_reader_get_remaining (&reader) - 4;
goto beach;
}
gst_byte_reader_skip (&reader, offset);
if (!gst_byte_reader_peek_uint64_be (&reader, &signature))
goto beach;
if (signature == PNG_SIGNATURE) {
/* We're skipping, go out, we'll be back */
*skipsize = gst_byte_reader_get_pos (&reader);
goto beach;
}
gst_byte_reader_skip (&reader, 4);
}
}
gst_byte_reader_skip (&reader, 8);
for (;;) {
guint32 length;
guint32 code;
if (!gst_byte_reader_get_uint32_be (&reader, &length))
goto beach;
if (!gst_byte_reader_get_uint32_le (&reader, &code))
goto beach;
if (code == GST_MAKE_FOURCC ('I', 'H', 'D', 'R')) {
if (!gst_byte_reader_get_uint32_be (&reader, &width))
goto beach;
if (!gst_byte_reader_get_uint32_be (&reader, &height))
goto beach;
length -= 8;
}
if (!gst_byte_reader_skip (&reader, length + 4))
goto beach;
if (code == GST_MAKE_FOURCC ('I', 'E', 'N', 'D')) {
if (pngparse->width != width || pngparse->height != height) {
GstCaps *caps;
pngparse->height = height;
pngparse->width = width;
caps = gst_caps_new_simple ("image/png",
"width", G_TYPE_INT, width, "height", G_TYPE_INT, height, NULL);
if (!gst_pad_set_caps (GST_BASE_PARSE_SRC_PAD (parse), caps)) {
ret = GST_FLOW_NOT_NEGOTIATED;
}
gst_caps_unref (caps);
if (ret != GST_FLOW_OK)
goto beach;
}
gst_buffer_unmap (frame->buffer, &map);
return gst_base_parse_finish_frame (parse, frame,
gst_byte_reader_get_pos (&reader));
}
}
beach:
gst_buffer_unmap (frame->buffer, &map);
return ret;
}
static GstFlowReturn
gst_png_parse_handle_frame (GstBaseParse * parse,
GstBaseParseFrame * frame, gint * skipsize)
{
GstPngParse *pngparse = GST_PNG_PARSE (parse);
GstMapInfo map;
GstByteReader reader;
GstFlowReturn ret = GST_FLOW_OK;
guint64 signature;
guint width = 0, height = 0;
gst_buffer_map (frame->buffer, &map, GST_MAP_READ);
gst_byte_reader_init (&reader, map.data, map.size);
if (!gst_byte_reader_peek_uint64_be (&reader, &signature))
goto beach;
if (signature != PNG_SIGNATURE) {
for (;;) {
guint offset;
offset = gst_byte_reader_masked_scan_uint32 (&reader, 0xffffffff,
0x89504E47, 0, gst_byte_reader_get_remaining (&reader));
if (offset == -1) {
*skipsize = gst_byte_reader_get_remaining (&reader) - 4;
goto beach;
}
gst_byte_reader_skip (&reader, offset);
if (!gst_byte_reader_peek_uint64_be (&reader, &signature))
goto beach;
if (signature == PNG_SIGNATURE) {
/* We're skipping, go out, we'll be back */
*skipsize = gst_byte_reader_get_pos (&reader);
goto beach;
}
gst_byte_reader_skip (&reader, 4);
}
}
gst_byte_reader_skip (&reader, 8);
for (;;) {
guint32 length;
guint32 code;
if (!gst_byte_reader_get_uint32_be (&reader, &length))
goto beach;
if (!gst_byte_reader_get_uint32_le (&reader, &code))
goto beach;
if (code == GST_MAKE_FOURCC ('I', 'H', 'D', 'R')) {
if (!gst_byte_reader_get_uint32_be (&reader, &width))
goto beach;
if (!gst_byte_reader_get_uint32_be (&reader, &height))
goto beach;
length -= 8;
}
if (!gst_byte_reader_skip (&reader, length + 4))
goto beach;
if (code == GST_MAKE_FOURCC ('I', 'E', 'N', 'D')) {
if (pngparse->width != width || pngparse->height != height) {
GstStructure *st = NULL;
GstCaps *caps, *sink_caps;
gint fr_num, fr_denom;
pngparse->height = height;
pngparse->width = width;
sink_caps =
gst_pad_get_current_caps (GST_BASE_PARSE_SINK_PAD (pngparse));
if (sink_caps && (st = gst_caps_get_structure (sink_caps, 0))
&& gst_structure_get_fraction (st, "framerate", &fr_num, &fr_denom)) {
/* Got it in caps - nothing more to do */
GST_DEBUG_OBJECT (pngparse,
"sink caps override framerate from headers");
} else {
GST_INFO_OBJECT (pngparse, "No framerate set");
}
caps = gst_caps_new_simple ("image/png",
"width", G_TYPE_INT, width, "height", G_TYPE_INT, height,
"framerate", GST_TYPE_FRACTION, fr_num, fr_denom, NULL);
if (!gst_pad_set_caps (GST_BASE_PARSE_SRC_PAD (parse), caps)) {
ret = GST_FLOW_NOT_NEGOTIATED;
}
gst_caps_unref (caps);
if (ret != GST_FLOW_OK)
goto beach;
}
gst_buffer_unmap (frame->buffer, &map);
return gst_base_parse_finish_frame (parse, frame,
gst_byte_reader_get_pos (&reader));
}
}
beach:
gst_buffer_unmap (frame->buffer, &map);
return ret;
}
static GstFlowReturn
gst_flxdec_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
{
GstByteReader reader;
GstBuffer *input;
GstMapInfo map_info;
GstCaps *caps;
guint available;
GstFlowReturn res = GST_FLOW_OK;
GstFlxDec *flxdec;
FlxHeader *flxh;
g_return_val_if_fail (buf != NULL, GST_FLOW_ERROR);
flxdec = (GstFlxDec *) parent;
g_return_val_if_fail (flxdec != NULL, GST_FLOW_ERROR);
gst_adapter_push (flxdec->adapter, buf);
available = gst_adapter_available (flxdec->adapter);
input = gst_adapter_get_buffer (flxdec->adapter, available);
if (!gst_buffer_map (input, &map_info, GST_MAP_READ)) {
GST_ELEMENT_ERROR (flxdec, STREAM, DECODE,
("%s", "Failed to map buffer"), (NULL));
goto error;
}
gst_byte_reader_init (&reader, map_info.data, map_info.size);
if (flxdec->state == GST_FLXDEC_READ_HEADER) {
if (available >= FlxHeaderSize) {
GstByteReader header;
GstCaps *templ;
if (!gst_byte_reader_get_sub_reader (&reader, &header, FlxHeaderSize)) {
GST_ELEMENT_ERROR (flxdec, STREAM, DECODE,
("%s", "Could not read header"), (NULL));
goto unmap_input_error;
}
gst_adapter_flush (flxdec->adapter, FlxHeaderSize);
available -= FlxHeaderSize;
if (!_read_flx_header (flxdec, &header, &flxdec->hdr)) {
GST_ELEMENT_ERROR (flxdec, STREAM, DECODE,
("%s", "Failed to parse header"), (NULL));
goto unmap_input_error;
}
flxh = &flxdec->hdr;
/* check header */
if (flxh->type != FLX_MAGICHDR_FLI &&
flxh->type != FLX_MAGICHDR_FLC && flxh->type != FLX_MAGICHDR_FLX) {
GST_ELEMENT_ERROR (flxdec, STREAM, WRONG_TYPE, (NULL),
("not a flx file (type %x)", flxh->type));
goto unmap_input_error;
}
GST_INFO_OBJECT (flxdec, "size : %d", flxh->size);
GST_INFO_OBJECT (flxdec, "frames : %d", flxh->frames);
GST_INFO_OBJECT (flxdec, "width : %d", flxh->width);
GST_INFO_OBJECT (flxdec, "height : %d", flxh->height);
GST_INFO_OBJECT (flxdec, "depth : %d", flxh->depth);
GST_INFO_OBJECT (flxdec, "speed : %d", flxh->speed);
flxdec->next_time = 0;
if (flxh->type == FLX_MAGICHDR_FLI) {
flxdec->frame_time = JIFFIE * flxh->speed;
} else if (flxh->speed == 0) {
flxdec->frame_time = GST_SECOND / 70;
} else {
flxdec->frame_time = flxh->speed * GST_MSECOND;
}
flxdec->duration = flxh->frames * flxdec->frame_time;
GST_LOG ("duration : %" GST_TIME_FORMAT,
GST_TIME_ARGS (flxdec->duration));
templ = gst_pad_get_pad_template_caps (flxdec->srcpad);
caps = gst_caps_copy (templ);
gst_caps_unref (templ);
gst_caps_set_simple (caps,
"width", G_TYPE_INT, flxh->width,
"height", G_TYPE_INT, flxh->height,
"framerate", GST_TYPE_FRACTION, (gint) GST_MSECOND,
(gint) flxdec->frame_time / 1000, NULL);
gst_pad_set_caps (flxdec->srcpad, caps);
gst_caps_unref (caps);
if (flxdec->need_segment) {
gst_pad_push_event (flxdec->srcpad,
gst_event_new_segment (&flxdec->segment));
flxdec->need_segment = FALSE;
}
/* zero means 8 */
if (flxh->depth == 0)
flxh->depth = 8;
if (flxh->depth != 8) {
GST_ELEMENT_ERROR (flxdec, STREAM, WRONG_TYPE,
("%s", "Don't know how to decode non 8 bit depth streams"), (NULL));
goto unmap_input_error;
}
flxdec->converter =
flx_colorspace_converter_new (flxh->width, flxh->height);
if (flxh->type == FLX_MAGICHDR_FLC || flxh->type == FLX_MAGICHDR_FLX) {
GST_INFO_OBJECT (flxdec, "(FLC) aspect_dx : %d", flxh->aspect_dx);
GST_INFO_OBJECT (flxdec, "(FLC) aspect_dy : %d", flxh->aspect_dy);
GST_INFO_OBJECT (flxdec, "(FLC) oframe1 : 0x%08x", flxh->oframe1);
GST_INFO_OBJECT (flxdec, "(FLC) oframe2 : 0x%08x", flxh->oframe2);
}
flxdec->size = ((guint) flxh->width * (guint) flxh->height);
if (flxdec->size >= G_MAXSIZE / 4) {
GST_ELEMENT_ERROR (flxdec, STREAM, DECODE,
("%s", "Cannot allocate required memory"), (NULL));
goto unmap_input_error;
}
/* create delta and output frame */
flxdec->frame_data = g_malloc0 (flxdec->size);
flxdec->delta_data = g_malloc0 (flxdec->size);
flxdec->state = GST_FLXDEC_PLAYING;
}
} else if (flxdec->state == GST_FLXDEC_PLAYING) {
GstBuffer *out;
/* while we have enough data in the adapter */
while (available >= FlxFrameChunkSize && res == GST_FLOW_OK) {
guint32 size;
guint16 type;
if (!gst_byte_reader_get_uint32_le (&reader, &size))
goto parse_error;
if (available < size)
goto need_more_data;
available -= size;
gst_adapter_flush (flxdec->adapter, size);
if (!gst_byte_reader_get_uint16_le (&reader, &type))
goto parse_error;
switch (type) {
case FLX_FRAME_TYPE:{
GstByteReader chunks;
GstByteWriter writer;
guint16 n_chunks;
GstMapInfo map;
GST_LOG_OBJECT (flxdec, "Have frame type 0x%02x of size %d", type,
size);
if (!gst_byte_reader_get_sub_reader (&reader, &chunks,
size - FlxFrameChunkSize))
goto parse_error;
if (!gst_byte_reader_get_uint16_le (&chunks, &n_chunks))
goto parse_error;
GST_LOG_OBJECT (flxdec, "Have %d chunks", n_chunks);
if (n_chunks == 0)
break;
if (!gst_byte_reader_skip (&chunks, 8)) /* reserved */
goto parse_error;
gst_byte_writer_init_with_data (&writer, flxdec->frame_data,
flxdec->size, TRUE);
/* decode chunks */
if (!flx_decode_chunks (flxdec, n_chunks, &chunks, &writer)) {
GST_ELEMENT_ERROR (flxdec, STREAM, DECODE,
("%s", "Could not decode chunk"), NULL);
goto unmap_input_error;
}
gst_byte_writer_reset (&writer);
/* save copy of the current frame for possible delta. */
memcpy (flxdec->delta_data, flxdec->frame_data, flxdec->size);
out = gst_buffer_new_and_alloc (flxdec->size * 4);
if (!gst_buffer_map (out, &map, GST_MAP_WRITE)) {
GST_ELEMENT_ERROR (flxdec, STREAM, DECODE,
("%s", "Could not map output buffer"), NULL);
gst_buffer_unref (out);
goto unmap_input_error;
}
/* convert current frame. */
flx_colorspace_convert (flxdec->converter, flxdec->frame_data,
map.data);
gst_buffer_unmap (out, &map);
GST_BUFFER_TIMESTAMP (out) = flxdec->next_time;
flxdec->next_time += flxdec->frame_time;
res = gst_pad_push (flxdec->srcpad, out);
break;
}
default:
GST_DEBUG_OBJECT (flxdec, "Unknown frame type 0x%02x, skipping %d",
type, size);
if (!gst_byte_reader_skip (&reader, size - FlxFrameChunkSize))
goto parse_error;
break;
}
}
}
need_more_data:
gst_buffer_unmap (input, &map_info);
gst_buffer_unref (input);
return res;
/* ERRORS */
parse_error:
GST_ELEMENT_ERROR (flxdec, STREAM, DECODE,
("%s", "Failed to parse stream"), (NULL));
unmap_input_error:
gst_buffer_unmap (input, &map_info);
error:
gst_buffer_unref (input);
return GST_FLOW_ERROR;
}
static gboolean
_read_flx_header (GstFlxDec * flxdec, GstByteReader * reader, FlxHeader * flxh)
{
memset (flxh, 0, sizeof (*flxh));
if (!gst_byte_reader_get_uint32_le (reader, &flxh->size))
goto error;
if (flxh->size < FlxHeaderSize) {
GST_ERROR_OBJECT (flxdec, "Invalid file size in the header");
return FALSE;
}
if (!gst_byte_reader_get_uint16_le (reader, &flxh->type))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->frames))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->width))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->height))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->depth))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->flags))
goto error;
if (!gst_byte_reader_get_uint32_le (reader, &flxh->speed))
goto error;
if (!gst_byte_reader_skip (reader, 2)) /* reserved */
goto error;
/* FLC */
if (!gst_byte_reader_get_uint32_le (reader, &flxh->created))
goto error;
if (!gst_byte_reader_get_uint32_le (reader, &flxh->creator))
goto error;
if (!gst_byte_reader_get_uint32_le (reader, &flxh->updated))
goto error;
if (!gst_byte_reader_get_uint32_le (reader, &flxh->updater))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->aspect_dx))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->aspect_dy))
goto error;
/* EGI */
if (!gst_byte_reader_get_uint16_le (reader, &flxh->ext_flags))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->keyframes))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->totalframes))
goto error;
if (!gst_byte_reader_get_uint32_le (reader, &flxh->req_memory))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->max_regions))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &flxh->transp_num))
goto error;
if (!gst_byte_reader_skip (reader, 24)) /* reserved */
goto error;
/* FLC */
if (!gst_byte_reader_get_uint32_le (reader, &flxh->oframe1))
goto error;
if (!gst_byte_reader_get_uint32_le (reader, &flxh->oframe2))
goto error;
if (!gst_byte_reader_skip (reader, 40)) /* reserved */
goto error;
return TRUE;
error:
GST_ERROR_OBJECT (flxdec, "Error reading file header");
return FALSE;
}
static gboolean
flx_decode_chunks (GstFlxDec * flxdec, gulong n_chunks, GstByteReader * reader,
GstByteWriter * writer)
{
gboolean ret = TRUE;
while (n_chunks--) {
GstByteReader chunk;
guint32 size;
guint16 type;
if (!gst_byte_reader_get_uint32_le (reader, &size))
goto parse_error;
if (!gst_byte_reader_get_uint16_le (reader, &type))
goto parse_error;
GST_LOG_OBJECT (flxdec, "chunk has type 0x%02x size %d", type, size);
if (!gst_byte_reader_get_sub_reader (reader, &chunk,
size - FlxFrameChunkSize)) {
GST_ERROR_OBJECT (flxdec, "Incorrect size in the chunk header");
goto error;
}
switch (type) {
case FLX_COLOR64:
ret = flx_decode_color (flxdec, &chunk, writer, 2);
break;
case FLX_COLOR256:
ret = flx_decode_color (flxdec, &chunk, writer, 0);
break;
case FLX_BRUN:
ret = flx_decode_brun (flxdec, &chunk, writer);
break;
case FLX_LC:
ret = flx_decode_delta_fli (flxdec, &chunk, writer);
break;
case FLX_SS2:
ret = flx_decode_delta_flc (flxdec, &chunk, writer);
break;
case FLX_BLACK:
ret = gst_byte_writer_fill (writer, 0, flxdec->size);
break;
case FLX_MINI:
break;
default:
GST_WARNING ("Unimplemented chunk type: 0x%02x size: %d - skipping",
type, size);
break;
}
if (!ret)
break;
}
return ret;
parse_error:
GST_ERROR_OBJECT (flxdec, "Failed to decode chunk");
error:
return FALSE;
}
