mirror of https://git.ffmpeg.org/ffmpeg.git
Simplification of how dct_mode affects decoding.
Originally committed as revision 14996 to svn://svn.ffmpeg.org/ffmpeg/trunk
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0dbddda397
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7ae6dcb595
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@ -247,7 +247,7 @@ typedef struct BlockInfo {
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const uint32_t *factor_table;
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const uint32_t *factor_table;
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const uint8_t *scan_table;
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const uint8_t *scan_table;
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uint8_t pos; /* position in block */
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uint8_t pos; /* position in block */
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uint8_t dct_mode;
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void (*idct_put)(uint8_t *dest, int line_size, DCTELEM *block);
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uint8_t partial_bit_count;
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uint8_t partial_bit_count;
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uint16_t partial_bit_buffer;
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uint16_t partial_bit_buffer;
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int shift_offset;
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int shift_offset;
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@ -352,7 +352,6 @@ static inline void dv_decode_video_segment(DVVideoContext *s,
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DCTELEM *block, *block1;
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DCTELEM *block, *block1;
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int c_offset;
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int c_offset;
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uint8_t *y_ptr;
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uint8_t *y_ptr;
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void (*idct_put)(uint8_t *dest, int line_size, DCTELEM *block);
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const uint8_t *buf_ptr;
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const uint8_t *buf_ptr;
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PutBitContext pb, vs_pb;
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PutBitContext pb, vs_pb;
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GetBitContext gb;
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GetBitContext gb;
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@ -386,7 +385,7 @@ static inline void dv_decode_video_segment(DVVideoContext *s,
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/* get the dc */
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/* get the dc */
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dc = get_sbits(&gb, 9);
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dc = get_sbits(&gb, 9);
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dct_mode = get_bits1(&gb);
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dct_mode = get_bits1(&gb);
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mb->dct_mode = dct_mode;
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mb->idct_put = s->idct_put[dct_mode && log2_blocksize==3];
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mb->scan_table = s->dv_zigzag[dct_mode];
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mb->scan_table = s->dv_zigzag[dct_mode];
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class1 = get_bits(&gb, 2);
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class1 = get_bits(&gb, 2);
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mb->factor_table = s->dv_idct_factor[class1 == 3][dct_mode]
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mb->factor_table = s->dv_idct_factor[class1 == 3][dct_mode]
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@ -471,15 +470,14 @@ static inline void dv_decode_video_segment(DVVideoContext *s,
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(mb_x>>((s->sys->pix_fmt == PIX_FMT_YUV411P)?2:1)))<<log2_blocksize);
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(mb_x>>((s->sys->pix_fmt == PIX_FMT_YUV411P)?2:1)))<<log2_blocksize);
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for(j = 0;j < 6; j++) {
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for(j = 0;j < 6; j++) {
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idct_put = s->idct_put[mb->dct_mode && log2_blocksize==3];
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if (s->sys->pix_fmt == PIX_FMT_YUV422P) { /* 4:2:2 */
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if (s->sys->pix_fmt == PIX_FMT_YUV422P) { /* 4:2:2 */
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if (j == 0 || j == 2) {
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if (j == 0 || j == 2) {
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/* Y0 Y1 */
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/* Y0 Y1 */
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idct_put(y_ptr + ((j >> 1)<<log2_blocksize),
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mb->idct_put(y_ptr + ((j >> 1)<<log2_blocksize),
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s->picture.linesize[0], block);
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s->picture.linesize[0], block);
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} else if(j > 3) {
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} else if(j > 3) {
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/* Cr Cb */
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/* Cr Cb */
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idct_put(s->picture.data[6 - j] + c_offset,
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mb->idct_put(s->picture.data[6 - j] + c_offset,
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s->picture.linesize[6 - j], block);
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s->picture.linesize[6 - j], block);
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}
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}
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/* note: j=1 and j=3 are "dummy" blocks in 4:2:2 */
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/* note: j=1 and j=3 are "dummy" blocks in 4:2:2 */
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@ -487,9 +485,9 @@ static inline void dv_decode_video_segment(DVVideoContext *s,
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if (j < 4) {
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if (j < 4) {
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if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x < (704 / 8)) {
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if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x < (704 / 8)) {
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/* NOTE: at end of line, the macroblock is handled as 420 */
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/* NOTE: at end of line, the macroblock is handled as 420 */
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idct_put(y_ptr + (j<<log2_blocksize), s->picture.linesize[0], block);
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mb->idct_put(y_ptr + (j<<log2_blocksize), s->picture.linesize[0], block);
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} else {
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} else {
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idct_put(y_ptr + (((j & 1) + (j >> 1) * s->picture.linesize[0])<<log2_blocksize),
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mb->idct_put(y_ptr + (((j & 1) + (j >> 1) * s->picture.linesize[0])<<log2_blocksize),
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s->picture.linesize[0], block);
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s->picture.linesize[0], block);
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}
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}
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} else {
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} else {
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@ -499,7 +497,7 @@ static inline void dv_decode_video_segment(DVVideoContext *s,
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uint8_t *c_ptr, *c_ptr1, *ptr, *ptr1;
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uint8_t *c_ptr, *c_ptr1, *ptr, *ptr1;
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int x, y, linesize;
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int x, y, linesize;
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/* NOTE: at end of line, the macroblock is handled as 420 */
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/* NOTE: at end of line, the macroblock is handled as 420 */
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idct_put(pixels, 8, block);
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mb->idct_put(pixels, 8, block);
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linesize = s->picture.linesize[6 - j];
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linesize = s->picture.linesize[6 - j];
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c_ptr = s->picture.data[6 - j] + c_offset;
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c_ptr = s->picture.data[6 - j] + c_offset;
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ptr = pixels;
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ptr = pixels;
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@ -514,7 +512,7 @@ static inline void dv_decode_video_segment(DVVideoContext *s,
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}
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}
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} else {
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} else {
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/* don't ask me why they inverted Cb and Cr ! */
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/* don't ask me why they inverted Cb and Cr ! */
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idct_put(s->picture.data[6 - j] + c_offset,
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mb->idct_put(s->picture.data[6 - j] + c_offset,
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s->picture.linesize[6 - j], block);
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s->picture.linesize[6 - j], block);
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}
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}
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}
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}
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