RFC 6386
VP8 Data Format and Decoding Guide
20.15. predict.h
---- Begin code block -------------------------------------- /* * Copyright (c) 2010, 2011, Google Inc. All rights reserved. * * Use of this source code is governed by a BSD-style license * that can be found in the LICENSE file in the root of the source * tree. An additional intellectual property rights grant can be * found in the file PATENTS. All contributing project authors may * be found in the AUTHORS file in the root of the source tree. */ #ifndef PREDICT_H #define PREDICT_H void vp8_dixie_predict_init(struct vp8_decoder_ctx *ctx); void vp8_dixie_predict_destroy(struct vp8_decoder_ctx *ctx); void vp8_dixie_predict_process_row(struct vp8_decoder_ctx *ctx, unsigned int row, unsigned int start_col, unsigned int num_cols); void vp8_dixie_release_ref_frame(struct ref_cnt_img *rcimg); struct ref_cnt_img * vp8_dixie_ref_frame(struct ref_cnt_img *rcimg); struct ref_cnt_img * vp8_dixie_find_free_ref_frame(struct ref_cnt_img *frames); #endif ---- End code block ----------------------------------------
20.16. tokens.c
---- Begin code block -------------------------------------- /* * Copyright (c) 2010, 2011, Google Inc. All rights reserved. * * Use of this source code is governed by a BSD-style license * that can be found in the LICENSE file in the root of the source * tree. An additional intellectual property rights grant can be * found in the file PATENTS. All contributing project authors may * be found in the AUTHORS file in the root of the source tree. */ #include "vpx_codec_internal.h" #include "dixie.h" #include "tokens.h" #include <stdlib.h> #include <string.h> #include <malloc.h> enum { EOB_CONTEXT_NODE, ZERO_CONTEXT_NODE, ONE_CONTEXT_NODE, LOW_VAL_CONTEXT_NODE, TWO_CONTEXT_NODE, THREE_CONTEXT_NODE, HIGH_LOW_CONTEXT_NODE, CAT_ONE_CONTEXT_NODE, CAT_THREEFOUR_CONTEXT_NODE, CAT_THREE_CONTEXT_NODE, CAT_FIVE_CONTEXT_NODE }; enum { ZERO_TOKEN, ONE_TOKEN, TWO_TOKEN, THREE_TOKEN, FOUR_TOKEN, DCT_VAL_CATEGORY1, DCT_VAL_CATEGORY2, DCT_VAL_CATEGORY3,
DCT_VAL_CATEGORY4,
DCT_VAL_CATEGORY5,
DCT_VAL_CATEGORY6,
DCT_EOB_TOKEN,
MAX_ENTROPY_TOKENS
};
struct extrabits
{
short min_val;
short length;
unsigned char probs[12];
};
static const unsigned int left_context_index[25] =
{
0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3,
4, 4, 5, 5, 6, 6, 7, 7, 8
};
static const unsigned int above_context_index[25] =
{
0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3,
4, 5, 4, 5, 6, 7, 6, 7, 8
};
#define X(n) ((n) * PREV_COEFF_CONTEXTS * ENTROPY_NODES)
static const unsigned int bands_x[16] =
{
X(0), X(1), X(2), X(3), X(6), X(4), X(5), X(6),
X(6), X(6), X(6), X(6), X(6), X(6), X(6), X(7)
};
#undef X
static const struct extrabits extrabits[MAX_ENTROPY_TOKENS] =
{
{ 0, -1, { 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0 } }, //ZERO_TOKEN
{ 1, 0, { 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0 } }, //ONE_TOKEN
{ 2, 0, { 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0 } }, //TWO_TOKEN
{ 3, 0, { 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0 } }, //THREE_TOKEN
{ 4, 0, { 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0 } }, //FOUR_TOKEN
{ 5, 0, {159, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0 } }, //DCT_VAL_CATEGORY1
{ 7, 1, {145, 165, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0 } }, //DCT_VAL_CATEGORY2
{11, 2, {140, 148, 173, 0, 0, 0,
0, 0, 0, 0, 0, 0 } }, //DCT_VAL_CATEGORY3
{19, 3, {135, 140, 155, 176, 0, 0,
0, 0, 0, 0, 0, 0 } }, //DCT_VAL_CATEGORY4
{35, 4, {130, 134, 141, 157, 180, 0,
0, 0, 0, 0, 0, 0 } }, //DCT_VAL_CATEGORY5
{67, 10, {129, 130, 133, 140, 153, 177,
196, 230, 243, 254, 254, 0 } }, //DCT_VAL_CATEGORY6
{ 0, -1, { 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0 } }, // EOB TOKEN
};
static const unsigned int zigzag[16] =
{
0, 1, 4, 8, 5, 2, 3, 6, 9, 12, 13, 10, 7, 11, 14, 15
};
#define DECODE_AND_APPLYSIGN(value_to_sign) \
v = (bool_get_bit(bool) ? -value_to_sign \
: value_to_sign) * dqf[!!c];
#define DECODE_AND_BRANCH_IF_ZERO(probability,branch) \
if (!bool_get(bool, probability)) goto branch;
#define DECODE_AND_LOOP_IF_ZERO(probability,branch) \
if (!bool_get(bool, probability)) \
{ \
prob = type_probs; \
if (c<15) {\
++c; \
prob += bands_x[c]; \
goto branch; \
}\
else \
goto BLOCK_FINISHED; /* for malformed input */\
}
#define DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(val) \
DECODE_AND_APPLYSIGN(val) \
prob = type_probs + (ENTROPY_NODES*2); \
if (c < 15){\
b_tokens[zigzag[c]] = v; \
++c; \
goto DO_WHILE; }\
b_tokens[zigzag[15]] = v; \
goto BLOCK_FINISHED;
#define DECODE_EXTRABIT_AND_ADJUST_VAL(t,bits_count)\
val += bool_get(bool, extrabits[t].probs[bits_count]) << \
bits_count;
static int
decode_mb_tokens(struct bool_decoder *bool,
token_entropy_ctx_t left,
token_entropy_ctx_t above,
short *tokens,
enum prediction_mode mode,
coeff_probs_table_t probs,
short factor[TOKEN_BLOCK_TYPES][2])
{
int i, stop, type;
int c, t, v;
int val, bits_count;
int eob_mask;
short *b_tokens; // tokens for this block
unsigned char *type_probs; // probabilities for this block type
unsigned char *prob;
short *dqf;
eob_mask = 0;
if (mode != B_PRED && mode != SPLITMV)
{
i = 24;
stop = 24;
type = 1;
b_tokens = tokens + 24 * 16;
dqf = factor[TOKEN_BLOCK_Y2];
}
else
{
i = 0;
stop = 16;
type = 3;
b_tokens = tokens;
dqf = factor[TOKEN_BLOCK_Y1];
}
/* Save a pointer to the coefficient probs for the current type.
* Need to repeat this whenever type changes.
*/
type_probs = probs[type][0][0];
BLOCK_LOOP:
t = left[left_context_index[i]] + above[above_context_index[i]];
c = !type; /* all blocks start at 0 except type 0, which starts
* at 1. */
prob = type_probs;
prob += t * ENTROPY_NODES;
DO_WHILE:
prob += bands_x[c];
DECODE_AND_BRANCH_IF_ZERO(prob[EOB_CONTEXT_NODE],
BLOCK_FINISHED);
CHECK_0_:
DECODE_AND_LOOP_IF_ZERO(prob[ZERO_CONTEXT_NODE], CHECK_0_);
DECODE_AND_BRANCH_IF_ZERO(prob[ONE_CONTEXT_NODE],
ONE_CONTEXT_NODE_0_);
DECODE_AND_BRANCH_IF_ZERO(prob[LOW_VAL_CONTEXT_NODE],
LOW_VAL_CONTEXT_NODE_0_);
DECODE_AND_BRANCH_IF_ZERO(prob[HIGH_LOW_CONTEXT_NODE],
HIGH_LOW_CONTEXT_NODE_0_);
DECODE_AND_BRANCH_IF_ZERO(prob[CAT_THREEFOUR_CONTEXT_NODE],
CAT_THREEFOUR_CONTEXT_NODE_0_);
DECODE_AND_BRANCH_IF_ZERO(prob[CAT_FIVE_CONTEXT_NODE],
CAT_FIVE_CONTEXT_NODE_0_);
val = extrabits[DCT_VAL_CATEGORY6].min_val;
bits_count = extrabits[DCT_VAL_CATEGORY6].length;
do
{
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY6,
bits_count);
bits_count --;
}
while (bits_count >= 0);
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(val);
CAT_FIVE_CONTEXT_NODE_0_:
val = extrabits[DCT_VAL_CATEGORY5].min_val;
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY5, 4);
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY5, 3);
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY5, 2);
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY5, 1);
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY5, 0);
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(val);
CAT_THREEFOUR_CONTEXT_NODE_0_:
DECODE_AND_BRANCH_IF_ZERO(prob[CAT_THREE_CONTEXT_NODE],
CAT_THREE_CONTEXT_NODE_0_);
val = extrabits[DCT_VAL_CATEGORY4].min_val;
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY4, 3);
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY4, 2);
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY4, 1);
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY4, 0);
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(val);
CAT_THREE_CONTEXT_NODE_0_:
val = extrabits[DCT_VAL_CATEGORY3].min_val;
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY3, 2);
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY3, 1);
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY3, 0);
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(val);
HIGH_LOW_CONTEXT_NODE_0_:
DECODE_AND_BRANCH_IF_ZERO(prob[CAT_ONE_CONTEXT_NODE],
CAT_ONE_CONTEXT_NODE_0_);
val = extrabits[DCT_VAL_CATEGORY2].min_val;
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY2, 1);
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY2, 0);
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(val);
CAT_ONE_CONTEXT_NODE_0_:
val = extrabits[DCT_VAL_CATEGORY1].min_val;
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY1, 0);
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(val);
LOW_VAL_CONTEXT_NODE_0_:
DECODE_AND_BRANCH_IF_ZERO(prob[TWO_CONTEXT_NODE],
TWO_CONTEXT_NODE_0_);
DECODE_AND_BRANCH_IF_ZERO(prob[THREE_CONTEXT_NODE],
THREE_CONTEXT_NODE_0_);
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(4);
THREE_CONTEXT_NODE_0_:
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(3);
TWO_CONTEXT_NODE_0_:
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(2);
ONE_CONTEXT_NODE_0_:
DECODE_AND_APPLYSIGN(1);
prob = type_probs + ENTROPY_NODES;
if (c < 15)
{
b_tokens[zigzag[c]] = v;
++c;
goto DO_WHILE;
}
b_tokens[zigzag[15]] = v;
BLOCK_FINISHED:
eob_mask |= (c > 1) << i;
t = (c != !type); // any non-zero data?
eob_mask |= t << 31;
left[left_context_index[i]] = above[above_context_index[i]] = t;
b_tokens += 16;
i++;
if (i < stop)
goto BLOCK_LOOP;
if (i == 25)
{
type = 0;
i = 0;
stop = 16;
type_probs = probs[type][0][0];
b_tokens = tokens;
dqf = factor[TOKEN_BLOCK_Y1];
goto BLOCK_LOOP;
}
if (i == 16)
{
type = 2;
type_probs = probs[type][0][0];
stop = 24;
dqf = factor[TOKEN_BLOCK_UV];
goto BLOCK_LOOP;
}
return eob_mask;
}
static void
reset_row_context(token_entropy_ctx_t *left)
{
memset(left, 0, sizeof(*left));
}
static void
reset_above_context(token_entropy_ctx_t *above, unsigned int cols)
{
memset(above, 0, cols * sizeof(*above));
}
static void
reset_mb_context(token_entropy_ctx_t *left,
token_entropy_ctx_t *above,
enum prediction_mode mode)
{
/* Reset the macroblock context on the left and right. We have
* to preserve the context of the second order block if this mode
* would not have updated it.
*/
memset(left, 0, sizeof((*left)[0]) * 8);
memset(above, 0, sizeof((*above)[0]) * 8);
if (mode != B_PRED && mode != SPLITMV)
{
(*left)[8] = 0;
(*above)[8] = 0;
}
}
void
vp8_dixie_tokens_process_row(struct vp8_decoder_ctx *ctx,
unsigned int partition,
unsigned int row,
unsigned int start_col,
unsigned int num_cols)
{
struct token_decoder *tokens = &ctx->tokens[partition];
short coeffs = tokens->coeffs + 25 * 16 * start_col;
unsigned int col;
token_entropy_ctx_t *above = ctx->above_token_entropy_ctx
+ start_col;
token_entropy_ctx_t *left = &tokens->left_token_entropy_ctx;
struct mb_info *mbi = ctx->mb_info_rows[row] + start_col;
if (row == 0)
reset_above_context(above, num_cols);
if (start_col == 0)
reset_row_context(left);
for (col = start_col; col < start_col + num_cols; col++)
{
memset(coeffs, 0, 25 * 16 * sizeof(short));
if (mbi->base.skip_coeff)
{
reset_mb_context(left, above, mbi->base.y_mode);
mbi->base.eob_mask = 0;
}
else
{
struct dequant_factors *dqf;
dqf = ctx->dequant_factors + mbi->base.segment_id;
mbi->base.eob_mask =
decode_mb_tokens(&tokens->bool,
*left, *above,
coeffs,
mbi->base.y_mode,
ctx->entropy_hdr.coeff_probs,
dqf->factor);
}
above++;
mbi++;
coeffs += 25 * 16;
}
}
void
vp8_dixie_tokens_init(struct vp8_decoder_ctx *ctx)
{
unsigned int partitions = ctx->token_hdr.partitions;
if (ctx->frame_hdr.frame_size_updated)
{
unsigned int i;
unsigned int coeff_row_sz =
ctx->mb_cols * 25 * 16 * sizeof(short);
for (i = 0; i < partitions; i++)
{
free(ctx->tokens[i].coeffs);
ctx->tokens[i].coeffs = memalign(16, coeff_row_sz);
if (!ctx->tokens[i].coeffs)
vpx_internal_error(&ctx->error, VPX_CODEC_MEM_ERROR,
NULL);
}
free(ctx->above_token_entropy_ctx);
ctx->above_token_entropy_ctx =
calloc(ctx->mb_cols,
sizeof(*ctx->above_token_entropy_ctx));
if (!ctx->above_token_entropy_ctx)
vpx_internal_error(&ctx->error,
VPX_CODEC_MEM_ERROR, NULL);
}
}
void
vp8_dixie_tokens_destroy(struct vp8_decoder_ctx *ctx)
{
int i;
for (i = 0; i < MAX_PARTITIONS; i++)
free(ctx->tokens[i].coeffs);
free(ctx->above_token_entropy_ctx);
}
---- End code block ----------------------------------------
20.17. tokens.h
---- Begin code block -------------------------------------- /* * Copyright (c) 2010, 2011, Google Inc. All rights reserved. * * Use of this source code is governed by a BSD-style license * that can be found in the LICENSE file in the root of the source * tree. An additional intellectual property rights grant can be * found in the file PATENTS. All contributing project authors may * be found in the AUTHORS file in the root of the source tree. */ #ifndef TOKENS_H #define TOKENS_H void vp8_dixie_tokens_init(struct vp8_decoder_ctx *ctx); void vp8_dixie_tokens_destroy(struct vp8_decoder_ctx *ctx); void vp8_dixie_tokens_process_row(struct vp8_decoder_ctx *ctx, unsigned int partition, unsigned int row, unsigned int start_col, unsigned int num_cols); #endif ---- End code block ----------------------------------------
20.18. vp8_prob_data.h
---- Begin code block -------------------------------------- /* * Copyright (c) 2010, 2011, Google Inc. All rights reserved. * * Use of this source code is governed by a BSD-style license * that can be found in the LICENSE file in the root of the source * tree. An additional intellectual property rights grant can be * found in the file PATENTS. All contributing project authors may * be found in the AUTHORS file in the root of the source tree. */ static const unsigned char k_coeff_entropy_update_probs[BLOCK_TYPES][COEFF_BANDS] [PREV_COEFF_CONTEXTS] [ENTROPY_NODES] = { { { {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}, }, { {176, 246, 255, 255, 255, 255, 255, 255, 255, 255, 255}, {223, 241, 252, 255, 255, 255, 255, 255, 255, 255, 255}, {249, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255}, }, { {255, 244, 252, 255, 255, 255, 255, 255, 255, 255, 255}, {234, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255}, {253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}, }, { {255, 246, 254, 255, 255, 255, 255, 255, 255, 255, 255}, {239, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255}, {254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255}, }, { {255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255}, {251, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255}, {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}, },
{
{255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
{251, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
{254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
},
{
{255, 254, 253, 255, 254, 255, 255, 255, 255, 255, 255},
{250, 255, 254, 255, 254, 255, 255, 255, 255, 255, 255},
{254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
},
{
{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
},
},
{
{
{217, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
{225, 252, 241, 253, 255, 255, 254, 255, 255, 255, 255},
{234, 250, 241, 250, 253, 255, 253, 254, 255, 255, 255},
},
{
{255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
{223, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
{238, 253, 254, 254, 255, 255, 255, 255, 255, 255, 255},
},
{
{255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255},
{249, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
},
{
{255, 253, 255, 255, 255, 255, 255, 255, 255, 255, 255},
{247, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
},
{
{255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
{252, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
},
{
{255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
{253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
},
{
{255, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255},
{250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
{254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
},
{
{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
},
},
{
{
{186, 251, 250, 255, 255, 255, 255, 255, 255, 255, 255},
{234, 251, 244, 254, 255, 255, 255, 255, 255, 255, 255},
{251, 251, 243, 253, 254, 255, 254, 255, 255, 255, 255},
},
{
{255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
{236, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
{251, 253, 253, 254, 254, 255, 255, 255, 255, 255, 255},
},
{
{255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
{254, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
},
{
{255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
{254, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
{254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
},
{
{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
{254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
},
{
{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
},
{
{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
},
{
{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
},
},
{
{
{248, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
{250, 254, 252, 254, 255, 255, 255, 255, 255, 255, 255},
{248, 254, 249, 253, 255, 255, 255, 255, 255, 255, 255},
},
{
{255, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255},
{246, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255},
{252, 254, 251, 254, 254, 255, 255, 255, 255, 255, 255},
},
{
{255, 254, 252, 255, 255, 255, 255, 255, 255, 255, 255},
{248, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255},
{253, 255, 254, 254, 255, 255, 255, 255, 255, 255, 255},
},
{
{255, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255},
{245, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255},
{253, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
},
{
{255, 251, 253, 255, 255, 255, 255, 255, 255, 255, 255},
{252, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
{255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
},
{
{255, 252, 255, 255, 255, 255, 255, 255, 255, 255, 255},
{249, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
{255, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
},
{
{255, 255, 253, 255, 255, 255, 255, 255, 255, 255, 255},
{250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
},
{
{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
{254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
},
},
};
static const
unsigned char k_default_y_mode_probs [] =
{ 112, 86, 140, 37};
static const
unsigned char k_default_uv_mode_probs [] =
{ 162, 101, 204};
static const
unsigned char k_default_coeff_probs [BLOCK_TYPES][COEFF_BANDS]
[PREV_COEFF_CONTEXTS][ENTROPY_NODES] =
{
{ /* block type 0 */
{ /* coeff band 0 */
{ 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
{ 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
{ 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128}
},
{ /* coeff band 1 */
{ 253, 136, 254, 255, 228, 219, 128, 128, 128, 128, 128},
{ 189, 129, 242, 255, 227, 213, 255, 219, 128, 128, 128},
{ 106, 126, 227, 252, 214, 209, 255, 255, 128, 128, 128}
},
{ /* coeff band 2 */
{ 1, 98, 248, 255, 236, 226, 255, 255, 128, 128, 128},
{ 181, 133, 238, 254, 221, 234, 255, 154, 128, 128, 128},
{ 78, 134, 202, 247, 198, 180, 255, 219, 128, 128, 128}
},
{ /* coeff band 3 */
{ 1, 185, 249, 255, 243, 255, 128, 128, 128, 128, 128},
{ 184, 150, 247, 255, 236, 224, 128, 128, 128, 128, 128},
{ 77, 110, 216, 255, 236, 230, 128, 128, 128, 128, 128}
},
{ /* coeff band 4 */
{ 1, 101, 251, 255, 241, 255, 128, 128, 128, 128, 128},
{ 170, 139, 241, 252, 236, 209, 255, 255, 128, 128, 128},
{ 37, 116, 196, 243, 228, 255, 255, 255, 128, 128, 128}
},
{ /* coeff band 5 */
{ 1, 204, 254, 255, 245, 255, 128, 128, 128, 128, 128},
{ 207, 160, 250, 255, 238, 128, 128, 128, 128, 128, 128},
{ 102, 103, 231, 255, 211, 171, 128, 128, 128, 128, 128}
},
{ /* coeff band 6 */
{ 1, 152, 252, 255, 240, 255, 128, 128, 128, 128, 128},
{ 177, 135, 243, 255, 234, 225, 128, 128, 128, 128, 128},
{ 80, 129, 211, 255, 194, 224, 128, 128, 128, 128, 128}
},
{ /* coeff band 7 */
{ 1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
{ 246, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
{ 255, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128}
}
},
{ /* block type 1 */
{ /* coeff band 0 */
{ 198, 35, 237, 223, 193, 187, 162, 160, 145, 155, 62},
{ 131, 45, 198, 221, 172, 176, 220, 157, 252, 221, 1},
{ 68, 47, 146, 208, 149, 167, 221, 162, 255, 223, 128}
},
{ /* coeff band 1 */
{ 1, 149, 241, 255, 221, 224, 255, 255, 128, 128, 128},
{ 184, 141, 234, 253, 222, 220, 255, 199, 128, 128, 128},
{ 81, 99, 181, 242, 176, 190, 249, 202, 255, 255, 128}
},
{ /* coeff band 2 */
{ 1, 129, 232, 253, 214, 197, 242, 196, 255, 255, 128},
{ 99, 121, 210, 250, 201, 198, 255, 202, 128, 128, 128},
{ 23, 91, 163, 242, 170, 187, 247, 210, 255, 255, 128}
},
{ /* coeff band 3 */
{ 1, 200, 246, 255, 234, 255, 128, 128, 128, 128, 128},
{ 109, 178, 241, 255, 231, 245, 255, 255, 128, 128, 128},
{ 44, 130, 201, 253, 205, 192, 255, 255, 128, 128, 128}
},
{ /* coeff band 4 */
{ 1, 132, 239, 251, 219, 209, 255, 165, 128, 128, 128},
{ 94, 136, 225, 251, 218, 190, 255, 255, 128, 128, 128},
{ 22, 100, 174, 245, 186, 161, 255, 199, 128, 128, 128}
},
{ /* coeff band 5 */
{ 1, 182, 249, 255, 232, 235, 128, 128, 128, 128, 128},
{ 124, 143, 241, 255, 227, 234, 128, 128, 128, 128, 128},
{ 35, 77, 181, 251, 193, 211, 255, 205, 128, 128, 128}
},
{ /* coeff band 6 */
{ 1, 157, 247, 255, 236, 231, 255, 255, 128, 128, 128},
{ 121, 141, 235, 255, 225, 227, 255, 255, 128, 128, 128},
{ 45, 99, 188, 251, 195, 217, 255, 224, 128, 128, 128}
},
{ /* coeff band 7 */
{ 1, 1, 251, 255, 213, 255, 128, 128, 128, 128, 128},
{ 203, 1, 248, 255, 255, 128, 128, 128, 128, 128, 128},
{ 137, 1, 177, 255, 224, 255, 128, 128, 128, 128, 128}
}
},
{ /* block type 2 */
{ /* coeff band 0 */
{ 253, 9, 248, 251, 207, 208, 255, 192, 128, 128, 128},
{ 175, 13, 224, 243, 193, 185, 249, 198, 255, 255, 128},
{ 73, 17, 171, 221, 161, 179, 236, 167, 255, 234, 128}
},
{ /* coeff band 1 */
{ 1, 95, 247, 253, 212, 183, 255, 255, 128, 128, 128},
{ 239, 90, 244, 250, 211, 209, 255, 255, 128, 128, 128},
{ 155, 77, 195, 248, 188, 195, 255, 255, 128, 128, 128}
},
{ /* coeff band 2 */
{ 1, 24, 239, 251, 218, 219, 255, 205, 128, 128, 128},
{ 201, 51, 219, 255, 196, 186, 128, 128, 128, 128, 128},
{ 69, 46, 190, 239, 201, 218, 255, 228, 128, 128, 128}
},
{ /* coeff band 3 */
{ 1, 191, 251, 255, 255, 128, 128, 128, 128, 128, 128},
{ 223, 165, 249, 255, 213, 255, 128, 128, 128, 128, 128},
{ 141, 124, 248, 255, 255, 128, 128, 128, 128, 128, 128}
},
{ /* coeff band 4 */
{ 1, 16, 248, 255, 255, 128, 128, 128, 128, 128, 128},
{ 190, 36, 230, 255, 236, 255, 128, 128, 128, 128, 128},
{ 149, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128}
},
{ /* coeff band 5 */
{ 1, 226, 255, 128, 128, 128, 128, 128, 128, 128, 128},
{ 247, 192, 255, 128, 128, 128, 128, 128, 128, 128, 128},
{ 240, 128, 255, 128, 128, 128, 128, 128, 128, 128, 128}
},
{ /* coeff band 6 */
{ 1, 134, 252, 255, 255, 128, 128, 128, 128, 128, 128},
{ 213, 62, 250, 255, 255, 128, 128, 128, 128, 128, 128},
{ 55, 93, 255, 128, 128, 128, 128, 128, 128, 128, 128}
},
{ /* coeff band 7 */
{ 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
{ 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
{ 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128}
}
},
{ /* block type 3 */
{ /* coeff band 0 */
{ 202, 24, 213, 235, 186, 191, 220, 160, 240, 175, 255},
{ 126, 38, 182, 232, 169, 184, 228, 174, 255, 187, 128},
{ 61, 46, 138, 219, 151, 178, 240, 170, 255, 216, 128}
},
{ /* coeff band 1 */
{ 1, 112, 230, 250, 199, 191, 247, 159, 255, 255, 128},
{ 166, 109, 228, 252, 211, 215, 255, 174, 128, 128, 128},
{ 39, 77, 162, 232, 172, 180, 245, 178, 255, 255, 128}
},
{ /* coeff band 2 */
{ 1, 52, 220, 246, 198, 199, 249, 220, 255, 255, 128},
{ 124, 74, 191, 243, 183, 193, 250, 221, 255, 255, 128},
{ 24, 71, 130, 219, 154, 170, 243, 182, 255, 255, 128}
},
{ /* coeff band 3 */
{ 1, 182, 225, 249, 219, 240, 255, 224, 128, 128, 128},
{ 149, 150, 226, 252, 216, 205, 255, 171, 128, 128, 128},
{ 28, 108, 170, 242, 183, 194, 254, 223, 255, 255, 128}
},
{ /* coeff band 4 */
{ 1, 81, 230, 252, 204, 203, 255, 192, 128, 128, 128},
{ 123, 102, 209, 247, 188, 196, 255, 233, 128, 128, 128},
{ 20, 95, 153, 243, 164, 173, 255, 203, 128, 128, 128}
},
{ /* coeff band 5 */
{ 1, 222, 248, 255, 216, 213, 128, 128, 128, 128, 128},
{ 168, 175, 246, 252, 235, 205, 255, 255, 128, 128, 128},
{ 47, 116, 215, 255, 211, 212, 255, 255, 128, 128, 128}
},
{ /* coeff band 6 */
{ 1, 121, 236, 253, 212, 214, 255, 255, 128, 128, 128},
{ 141, 84, 213, 252, 201, 202, 255, 219, 128, 128, 128},
{ 42, 80, 160, 240, 162, 185, 255, 205, 128, 128, 128}
},
{ /* coeff band 7 */
{ 1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
{ 244, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
{ 238, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128}
}
}
};
static const
unsigned char k_mv_entropy_update_probs[2][MV_PROB_CNT] =
{
{
237,
246,
253, 253, 254, 254, 254, 254, 254,
254, 254, 254, 254, 254, 250, 250, 252, 254, 254
},
{
231,
243,
245, 253, 254, 254, 254, 254, 254,
254, 254, 254, 254, 254, 251, 251, 254, 254, 254
}
};
static const
unsigned char k_default_mv_probs[2][MV_PROB_CNT] =
{
{ // row
162, // is short
128, // sign
225, 146, 172, 147, 214, 39, 156, // short tree
128, 129, 132, 75, 145, 178, 206, 239, 254, 254 // long bits
},
{
164,
128,
204, 170, 119, 235, 140, 230, 228,
128, 130, 130, 74, 148, 180, 203, 236, 254, 254
}
};
---- End code block ----------------------------------------
20.19. vpx_codec_internal.h
---- Begin code block -------------------------------------- /* * Copyright (c) 2010, 2011, Google Inc. All rights reserved. * * Use of this source code is governed by a BSD-style license * that can be found in the LICENSE file in the root of the source * tree. An additional intellectual property rights grant can be * found in the file PATENTS. All contributing project authors may * be found in the AUTHORS file in the root of the source tree. */ /*!\file vpx_codec_internal.h * \brief Describes the decoder algorithm interface for algorithm * implementations. * * This file defines the private structures and data types that are * only relevant to implementing an algorithm, as opposed to using * it. * * To create a decoder algorithm class, an interface structure is put * into the global namespace: * <pre> * my_codec.c: * vpx_codec_iface_t my_codec = { * "My Codec v1.0", * VPX_CODEC_ALG_ABI_VERSION, * ... * }; * </pre> * * An application instantiates a specific decoder instance by using * vpx_codec_init() and a pointer to the algorithm's interface * structure: * <pre> * my_app.c: * extern vpx_codec_iface_t my_codec; * { * vpx_codec_ctx_t algo; * res = vpx_codec_init(&algo, &my_codec); * } * </pre> *
* Once initialized, the instance is managed using other functions
* from the vpx_codec_* family.
*/
#ifndef VPX_CODEC_INTERNAL_H
#define VPX_CODEC_INTERNAL_H
#include "vpx_decoder.h"
#include <stdarg.h>
/*!\brief Current ABI version number
*
* \internal
* If this file is altered in any way that changes the Application
* Binary Interface (ABI), this value must be bumped. Examples
* include, but are not limited to, changing types, removing or
* reassigning enums, adding/removing/rearranging fields to
* structures.
*/
#define VPX_CODEC_INTERNAL_ABI_VERSION (3)
typedef struct vpx_codec_alg_priv vpx_codec_alg_priv_t;
/*!\brief init function pointer prototype
*
* Performs algorithm-specific initialization of the decoder context.
* This function is called by the generic vpx_codec_init() wrapper
* function, so plugins implementing this interface may trust the
* input parameters to be properly initialized.
*
* \param[in] ctx Pointer to this instance's context
* \retval #VPX_CODEC_OK
* The input stream was recognized and decoder initialized.
* \retval #VPX_CODEC_MEM_ERROR
* Memory operation failed.
*/
typedef vpx_codec_err_t (*vpx_codec_init_fn_t)(vpx_codec_ctx_t *ctx);
/*!\brief destroy function pointer prototype
*
* Performs algorithm-specific destruction of the decoder context.
* This function is called by the generic vpx_codec_destroy() wrapper
* function, so plugins implementing this interface may trust the
* input parameters to be properly initialized.
*
* \param[in] ctx Pointer to this instance's context
* \retval #VPX_CODEC_OK
* The input stream was recognized and decoder initialized.
* \retval #VPX_CODEC_MEM_ERROR
* Memory operation failed.
*/
typedef vpx_codec_err_t (*vpx_codec_destroy_fn_t)(
vpx_codec_alg_priv_t *ctx);
/*!\brief parse stream info function pointer prototype
*
* Performs high level parsing of the bitstream. This function is
* called by the generic vpx_codec_parse_stream() wrapper function,
* so plugins implementing this interface may trust the input
* parameters to be properly initialized.
*
* \param[in] data Pointer to a block of data to parse
* \param[in] data_sz Size of the data buffer
* \param[in,out] si Pointer to stream info to update. The
* size member \ref MUST be properly
* initialized, but \ref MAY be clobbered by
* the algorithm. This parameter \ref MAY
* be NULL.
*
* \retval #VPX_CODEC_OK
* Bitstream is parsable and stream information updated
*/
typedef vpx_codec_err_t (*vpx_codec_peek_si_fn_t)(
const uint8_t *data,
unsigned int data_sz,
vpx_codec_stream_info_t *si);
/*!\brief Return information about the current stream.
*
* Returns information about the stream that has been parsed during
* decoding.
*
* \param[in] ctx Pointer to this instance's context
* \param[in,out] si Pointer to stream info to update. The
* size member \ref MUST be properly
* initialized, but \ref MAY be clobbered by
* the algorithm. This parameter \ref MAY
* be NULL.
*
* \retval #VPX_CODEC_OK
* Bitstream is parsable and stream information updated
*/
typedef vpx_codec_err_t (*vpx_codec_get_si_fn_t)(
vpx_codec_alg_priv_t *ctx,
vpx_codec_stream_info_t *si);
/*!\brief control function pointer prototype
*
* This function is used to exchange algorithm-specific data with the
* decoder instance. This can be used to implement features specific
* to a particular algorithm.
*
* This function is called by the generic vpx_codec_control() wrapper
* function, so plugins implementing this interface may trust the
* input parameters to be properly initialized. However, this
* interface does not provide type safety for the exchanged data or
* assign meanings to the control codes. Those details should be
* specified in the algorithm's header file. In particular, the
* ctrl_id parameter is guaranteed to exist in the algorithm's
* control mapping table, and the data parameter may be NULL.
*
*
* \param[in] ctx Pointer to this instance's context
* \param[in] ctrl_id Algorithm-specific control identifier
* \param[in,out] data Data to exchange with algorithm instance.
*
* \retval #VPX_CODEC_OK
* The internal state data was deserialized.
*/
typedef vpx_codec_err_t (*vpx_codec_control_fn_t)(
vpx_codec_alg_priv_t *ctx,
int ctrl_id,
va_list ap);
/*!\brief control function pointer mapping
*
* This structure stores the mapping between control identifiers and
* implementing functions. Each algorithm provides a list of these
* mappings. This list is searched by the vpx_codec_control()
* wrapper function to determine which function to invoke. The
* special value {0, NULL} is used to indicate end-of-list, and must
* be present. The special value {0, <non-null>} can be used as a
* catch-all mapping. This implies that ctrl_id values chosen by the
* algorithm \ref MUST be non-zero.
*/
typedef const struct
{
int ctrl_id;
vpx_codec_control_fn_t fn;
} vpx_codec_ctrl_fn_map_t;
/*!\brief decode data function pointer prototype
*
* Processes a buffer of coded data. If the processing results in a
* new decoded frame becoming available, #VPX_CODEC_CB_PUT_SLICE and
* #VPX_CODEC_CB_PUT_FRAME events are generated as appropriate.
* This function is called by the generic vpx_codec_decode() wrapper
* function, so plugins implementing this interface may trust the
* input parameters to be properly initialized.
*
* \param[in] ctx Pointer to this instance's context
* \param[in] data Pointer to this block of new coded data.
* If NULL, a #VPX_CODEC_CB_PUT_FRAME event is
* posted for the previously decoded frame.
* \param[in] data_sz Size of the coded data, in bytes.
*
* \return Returns #VPX_CODEC_OK if the coded data was processed
* completely and future pictures can be decoded without
* error. Otherwise, see the descriptions of the other error
* codes in ::vpx_codec_err_t for recoverability
* capabilities.
*/
typedef vpx_codec_err_t (*vpx_codec_decode_fn_t)(
vpx_codec_alg_priv_t *ctx,
const uint8_t *data,
unsigned int data_sz,
void *user_priv,
long deadline);
/*!\brief Decoded frames iterator
*
* Iterates over a list of the frames available for display. The
* iterator storage should be initialized to NULL to start the
* iteration. Iteration is complete when this function returns NULL.
*
* The list of available frames becomes valid upon completion of the
* vpx_codec_decode call, and remains valid until the next call to
* vpx_codec_decode.
*
* \param[in] ctx Pointer to this instance's context
* \param[in out] iter Iterator storage, initialized to NULL
*
* \return Returns a pointer to an image, if one is ready for
* display. Frames produced will always be in PTS
* (presentation time stamp) order.
*/
typedef vpx_image_t*(*vpx_codec_get_frame_fn_t)(
vpx_codec_alg_priv_t *ctx,
vpx_codec_iter_t *iter);
/*\brief External Memory Allocation memory map get iterator
*
* Iterates over a list of the memory maps requested by the decoder.
* The iterator storage should be initialized to NULL to start the
* iteration. Iteration is complete when this function returns NULL.
*
* \param[in out] iter Iterator storage, initialized to NULL
*
* \return Returns a pointer to a memory segment descriptor, or NULL
* to indicate end-of-list.
*/
typedef vpx_codec_err_t (*vpx_codec_get_mmap_fn_t)(
const vpx_codec_ctx_t *ctx,
vpx_codec_mmap_t *mmap,
vpx_codec_iter_t *iter);
/*\brief External Memory Allocation memory map set iterator
*
* Sets a memory descriptor inside the decoder instance.
*
* \param[in] ctx Pointer to this instance's context
* \param[in] mmap Memory map to store.
*
* \retval #VPX_CODEC_OK
* The memory map was accepted and stored.
* \retval #VPX_CODEC_MEM_ERROR
* The memory map was rejected.
*/
typedef vpx_codec_err_t (*vpx_codec_set_mmap_fn_t)(
vpx_codec_ctx_t *ctx,
const vpx_codec_mmap_t *mmap);
typedef vpx_codec_err_t (*vpx_codec_encode_fn_t)(
vpx_codec_alg_priv_t *ctx,
const vpx_image_t *img,
vpx_codec_pts_t pts,
unsigned long duration,
vpx_enc_frame_flags_t flags,
unsigned long deadline);
typedef const vpx_codec_cx_pkt_t*(*vpx_codec_get_cx_data_fn_t)(
vpx_codec_alg_priv_t *ctx,
vpx_codec_iter_t *iter);
typedef vpx_codec_err_t
(*vpx_codec_enc_config_set_fn_t)(
vpx_codec_alg_priv_t *ctx,
const vpx_codec_enc_cfg_t *cfg);
typedef vpx_fixed_buf_t *
(*vpx_codec_get_global_headers_fn_t)(vpx_codec_alg_priv_t *ctx);
typedef vpx_image_t *
(*vpx_codec_get_preview_frame_fn_t)(vpx_codec_alg_priv_t *ctx);
/*!\brief usage configuration mapping
*
* This structure stores the mapping between usage identifiers and
* configuration structures. Each algorithm provides a list of these
* mappings. This list is searched by the
* vpx_codec_enc_config_default() wrapper function to determine which
* config to return. The special value {-1, {0}} is used to indicate
* end-of-list, and must be present. At least one mapping must be
* present, in addition to the end-of-list.
*
*/
typedef const struct
{
int usage;
vpx_codec_enc_cfg_t cfg;
} vpx_codec_enc_cfg_map_t;
#define NOT_IMPLEMENTED 0
/*!\brief Decoder algorithm interface
*
* All decoders \ref MUST expose a variable of this type.
*/
struct vpx_codec_iface
{
const char *name;
int abi_version;
vpx_codec_caps_t caps;
vpx_codec_init_fn_t init;
vpx_codec_destroy_fn_t destroy;
vpx_codec_ctrl_fn_map_t *ctrl_maps;
vpx_codec_get_mmap_fn_t get_mmap;
vpx_codec_set_mmap_fn_t set_mmap;
struct
{
vpx_codec_peek_si_fn_t peek_si;
vpx_codec_get_si_fn_t get_si;
vpx_codec_decode_fn_t decode;
vpx_codec_get_frame_fn_t get_frame;
} dec;
struct
{
vpx_codec_enc_cfg_map_t *cfg_maps;
vpx_codec_encode_fn_t encode;
vpx_codec_get_cx_data_fn_t get_cx_data;
vpx_codec_enc_config_set_fn_t cfg_set;
vpx_codec_get_global_headers_fn_t get_glob_hdrs;
vpx_codec_get_preview_frame_fn_t get_preview;
} enc;
};
/*!\brief Callback function pointer / user data pair storage */
typedef struct vpx_codec_priv_cb_pair
{
union
{
vpx_codec_put_frame_cb_fn_t put_frame;
vpx_codec_put_slice_cb_fn_t put_slice;
};
void *user_priv;
} vpx_codec_priv_cb_pair_t;
/*!\brief Instance private storage
*
* This structure is allocated by the algorithm's init function. It
* can be extended in one of two ways. First, a second, algorithm
* specific structure can be allocated and the priv member pointed to
* it. Alternatively, this structure can be made the first member of
* the algorithm-specific structure, and the pointer casted to the
* proper type.
*/
struct vpx_codec_priv
{
unsigned int sz;
vpx_codec_iface_t *iface;
struct vpx_codec_alg_priv *alg_priv;
const char *err_detail;
vpx_codec_flags_t init_flags;
struct
{
vpx_codec_priv_cb_pair_t put_frame_cb;
vpx_codec_priv_cb_pair_t put_slice_cb;
} dec;
struct
{
struct vpx_fixed_buf cx_data_dst_buf;
unsigned int cx_data_pad_before;
unsigned int cx_data_pad_after;
vpx_codec_cx_pkt_t cx_data_pkt;
} enc;
};
#undef VPX_CTRL_USE_TYPE
#define VPX_CTRL_USE_TYPE(id, typ) \
static typ id##__value(va_list args) \
{return va_arg(args, typ);} \
static typ id##__convert(void *x)\
{\
union\
{\
void *x;\
typ d;\
} u;\
u.x = x;\
return u.d;\
}
#undef VPX_CTRL_USE_TYPE_DEPRECATED
#define VPX_CTRL_USE_TYPE_DEPRECATED(id, typ) \
static typ id##__value(va_list args) \
{return va_arg(args, typ);} \
static typ id##__convert(void *x)\
{\
union\
{\
void *x;\
typ d;\
} u;\
u.x = x;\
return u.d;\
}
#define CAST(id, arg) id##__value(arg)
#define RECAST(id, x) id##__convert(x)
/* Internal Utility Functions
*
* The following functions are intended to be used inside algorithms
* as utilities for manipulating vpx_codec_* data structures.
*/
struct vpx_codec_pkt_list
{
unsigned int cnt;
unsigned int max;
struct vpx_codec_cx_pkt pkts[1];
};
#define vpx_codec_pkt_list_decl(n)\
union {struct vpx_codec_pkt_list head;\
struct {struct vpx_codec_pkt_list head;\
struct vpx_codec_cx_pkt pkts[n];} alloc;}
#define vpx_codec_pkt_list_init(m)\
(m)->alloc.head.cnt = 0,\
(m)->alloc.head.max = \
sizeof((m)->alloc.pkts) / sizeof((m)->alloc.pkts[0])
int
vpx_codec_pkt_list_add(struct vpx_codec_pkt_list *,
const struct vpx_codec_cx_pkt *);
const vpx_codec_cx_pkt_t*
vpx_codec_pkt_list_get(struct vpx_codec_pkt_list *list,
vpx_codec_iter_t *iter);
#include <stdio.h>
#include <setjmp.h>
struct vpx_internal_error_info
{
vpx_codec_err_t error_code;
int has_detail;
char detail[80];
int setjmp;
jmp_buf jmp;
};
static void vpx_internal_error(struct vpx_internal_error_info *info,
vpx_codec_err_t error,
const char *fmt,
...)
{
va_list ap;
info->error_code = error;
info->has_detail = 0;
if (fmt)
{
size_t sz = sizeof(info->detail);
info->has_detail = 1;
va_start(ap, fmt);
vsnprintf(info->detail, sz - 1, fmt, ap);
va_end(ap);
info->detail[sz-1] = '\0';
}
if (info->setjmp)
longjmp(info->jmp, info->error_code);
}
#endif
---- End code block ----------------------------------------
(page 263 continued on part 10)
