i = scan[coeff--]; \
block[i] = (c) * quant[i];
-//! aligns the bitstream to the give power of two
+/// aligns the bitstream to the given power of two
#define ALIGN(a) \
n = (-get_bits_count(gb)) & (a - 1); \
if (n) {skip_bits(gb, n);}
* aligned this could be done faster in a different way, e.g. as it is done
* in MPlayer libmpcodecs/native/rtjpegn.c.
*/
-static inline int get_block(GetBitContext *gb, DCTELEM *block, const uint8_t *scan,
+static inline int get_block(GetBitContext *gb, int16_t *block, const uint8_t *scan,
const uint32_t *quant) {
int coeff, i, n;
int8_t ac;
// number of non-zero coefficients
coeff = get_bits(gb, 6);
- if (get_bits_count(gb) + (coeff << 1) >= gb->size_in_bits)
+ if (get_bits_left(gb) < (coeff << 1))
return -1;
// normally we would only need to clear the (63 - coeff) last values,
// but since we do not know where they are we just clear the whole block
- memset(block, 0, 64 * sizeof(DCTELEM));
+ memset(block, 0, 64 * sizeof(int16_t));
// 2 bits per coefficient
while (coeff) {
// 4 bits per coefficient
ALIGN(4);
- if (get_bits_count(gb) + (coeff << 2) >= gb->size_in_bits)
+ if (get_bits_left(gb) < (coeff << 2))
return -1;
while (coeff) {
ac = get_sbits(gb, 4);
// 8 bits per coefficient
ALIGN(8);
- if (get_bits_count(gb) + (coeff << 3) >= gb->size_in_bits)
+ if (get_bits_left(gb) < (coeff << 3))
return -1;
while (coeff) {
ac = get_sbits(gb, 8);
/**
* @brief decode one rtjpeg YUV420 frame
- * @param c context, must be initialized via rtjpeg_decode_init
+ * @param c context, must be initialized via ff_rtjpeg_decode_init
* @param f AVFrame to place decoded frame into. If parts of the frame
* are not coded they are left unchanged, so consider initializing it
* @param buf buffer containing input data
* @param buf_size length of input data in bytes
* @return number of bytes consumed from the input buffer
*/
-int rtjpeg_decode_frame_yuv420(RTJpegContext *c, AVFrame *f,
- const uint8_t *buf, int buf_size) {
+int ff_rtjpeg_decode_frame_yuv420(RTJpegContext *c, AVFrame *f,
+ const uint8_t *buf, int buf_size) {
GetBitContext gb;
int w = c->w / 16, h = c->h / 16;
int x, y;
if (res > 0) \
c->dsp->idct_put(dst, stride, block); \
} while (0)
- DCTELEM *block = c->block;
+ int16_t *block = c->block;
BLOCK(c->lquant, y1, f->linesize[0]);
y1 += 8;
BLOCK(c->lquant, y1, f->linesize[0]);
* @param lquant luma quantization table to use
* @param cquant chroma quantization table to use
*/
-void rtjpeg_decode_init(RTJpegContext *c, DSPContext *dsp,
- int width, int height,
- const uint32_t *lquant, const uint32_t *cquant) {
+void ff_rtjpeg_decode_init(RTJpegContext *c, DSPContext *dsp,
+ int width, int height,
+ const uint32_t *lquant, const uint32_t *cquant) {
int i;
c->dsp = dsp;
for (i = 0; i < 64; i++) {