Functions
gst_jpeg_segment_parse_restart_interval ()
gboolean
gst_jpeg_segment_parse_restart_interval
(const GstJpegSegment *segment
,
guint *interval
);
gst_jpeg_get_default_quantization_tables ()
void
gst_jpeg_get_default_quantization_tables
(GstJpegQuantTables *quant_tables
);
gst_jpeg_get_default_huffman_tables ()
void
gst_jpeg_get_default_huffman_tables (GstJpegHuffmanTables *huff_tables
);
Types and Values
GST_JPEG_MAX_FRAME_COMPONENTS
#define GST_JPEG_MAX_FRAME_COMPONENTS 256
GST_JPEG_MAX_SCAN_COMPONENTS
#define GST_JPEG_MAX_SCAN_COMPONENTS 4
GST_JPEG_MAX_QUANT_ELEMENTS
#define GST_JPEG_MAX_QUANT_ELEMENTS 64
GST_JPEG_MARKER_SOF_MIN
#define GST_JPEG_MARKER_SOF_MIN GST_JPEG_MARKER_SOF0
GST_JPEG_MARKER_SOF_MAX
#define GST_JPEG_MARKER_SOF_MAX GST_JPEG_MARKER_SOF15
GST_JPEG_MARKER_APP_MIN
#define GST_JPEG_MARKER_APP_MIN GST_JPEG_MARKER_APP0
GST_JPEG_MARKER_APP_MAX
#define GST_JPEG_MARKER_APP_MAX GST_JPEG_MARKER_APP15
GST_JPEG_MARKER_RST_MIN
#define GST_JPEG_MARKER_RST_MIN GST_JPEG_MARKER_RST0
GST_JPEG_MARKER_RST_MAX
#define GST_JPEG_MARKER_RST_MAX GST_JPEG_MARKER_RST7
enum GstJpegEntropyCodingMode
struct GstJpegSegment
struct GstJpegSegment {
GstJpegMarker marker;
const guint8 *data;
guint offset;
gssize size;
};
struct GstJpegFrameHdr
struct GstJpegFrameHdr {
guint8 sample_precision; /* 2 .. 16 */
guint16 width; /* 1 .. 65535 */
guint16 height; /* 0 .. 65535 */
guint8 num_components; /* 1 .. 255 */
GstJpegFrameComponent components[GST_JPEG_MAX_FRAME_COMPONENTS];
};
struct GstJpegFrameComponent
struct GstJpegFrameComponent {
guint8 identifier; /* 0 .. 255 */
guint8 horizontal_factor; /* 1 .. 4 */
guint8 vertical_factor; /* 1 .. 4 */
guint8 quant_table_selector; /* 0 .. 3 */
};
struct GstJpegScanHdr
struct GstJpegScanHdr {
guint8 num_components; /* 1 .. 4 */
GstJpegScanComponent components[GST_JPEG_MAX_SCAN_COMPONENTS];
};
struct GstJpegScanComponent
struct GstJpegScanComponent {
guint8 component_selector; /* 0 .. 255 */
guint8 dc_selector; /* 0 .. 3 */
guint8 ac_selector; /* 0 .. 3 */
};
struct GstJpegHuffmanTables
struct GstJpegHuffmanTables {
GstJpegHuffmanTable dc_tables[GST_JPEG_MAX_SCAN_COMPONENTS];
GstJpegHuffmanTable ac_tables[GST_JPEG_MAX_SCAN_COMPONENTS];
};
struct GstJpegHuffmanTable
struct GstJpegHuffmanTable {
guint8 huf_bits[16];
guint8 huf_values[256];
gboolean valid;
};
struct GstJpegQuantTable
struct GstJpegQuantTable {
guint8 quant_precision;
guint16 quant_table[GST_JPEG_MAX_QUANT_ELEMENTS];
gboolean valid;
};