X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2F4xm.c;h=b2d4db26b0555520d6b32ebf2e975c7c152c42bb;hb=3e8651a7ccd8e89cc2f162cf614a3c9f7f4d9fcf;hp=0ae10d59055823452c99437a864cface46853341;hpb=bc78ceec2be6613c265387017221c7ceda15aa7d;p=ffmpeg diff --git a/libavcodec/4xm.c b/libavcodec/4xm.c index 0ae10d59055..b2d4db26b05 100644 --- a/libavcodec/4xm.c +++ b/libavcodec/4xm.c @@ -24,120 +24,126 @@ * 4XM codec. */ +#include + +#include "libavutil/frame.h" +#include "libavutil/imgutils.h" #include "libavutil/intreadwrite.h" #include "avcodec.h" -#include "dsputil.h" -#include "get_bits.h" +#include "blockdsp.h" +#include "bswapdsp.h" #include "bytestream.h" - -//#undef NDEBUG -//#include +#include "get_bits.h" +#include "internal.h" #define BLOCK_TYPE_VLC_BITS 5 #define ACDC_VLC_BITS 9 #define CFRAME_BUFFER_COUNT 100 -static const uint8_t block_type_tab[2][4][8][2]={ - { - { //{8,4,2}x{8,4,2} - { 0,1}, { 2,2}, { 6,3}, {14,4}, {30,5}, {31,5}, { 0,0} - },{ //{8,4}x1 - { 0,1}, { 0,0}, { 2,2}, { 6,3}, {14,4}, {15,4}, { 0,0} - },{ //1x{8,4} - { 0,1}, { 2,2}, { 0,0}, { 6,3}, {14,4}, {15,4}, { 0,0} - },{ //1x2, 2x1 - { 0,1}, { 0,0}, { 0,0}, { 2,2}, { 6,3}, {14,4}, {15,4} - } - },{ - { //{8,4,2}x{8,4,2} - { 1,2}, { 4,3}, { 5,3}, {0,2}, {6,3}, {7,3}, {0,0} - },{//{8,4}x1 - { 1,2}, { 0,0}, { 2,2}, {0,2}, {6,3}, {7,3}, {0,0} - },{//1x{8,4} - { 1,2}, { 2,2}, { 0,0}, {0,2}, {6,3}, {7,3}, {0,0} - },{//1x2, 2x1 - { 1,2}, { 0,0}, { 0,0}, {0,2}, {2,2}, {6,3}, {7,3} - } - } +static const uint8_t block_type_tab[2][4][8][2] = { + { + { // { 8, 4, 2 } x { 8, 4, 2} + { 0, 1 }, { 2, 2 }, { 6, 3 }, { 14, 4 }, { 30, 5 }, { 31, 5 }, { 0, 0 } + }, { // { 8, 4 } x 1 + { 0, 1 }, { 0, 0 }, { 2, 2 }, { 6, 3 }, { 14, 4 }, { 15, 4 }, { 0, 0 } + }, { // 1 x { 8, 4 } + { 0, 1 }, { 2, 2 }, { 0, 0 }, { 6, 3 }, { 14, 4 }, { 15, 4 }, { 0, 0 } + }, { // 1 x 2, 2 x 1 + { 0, 1 }, { 0, 0 }, { 0, 0 }, { 2, 2 }, { 6, 3 }, { 14, 4 }, { 15, 4 } + } + }, { + { // { 8, 4, 2 } x { 8, 4, 2} + { 1, 2 }, { 4, 3 }, { 5, 3 }, { 0, 2 }, { 6, 3 }, { 7, 3 }, { 0, 0 } + }, {// { 8, 4 } x 1 + { 1, 2 }, { 0, 0 }, { 2, 2 }, { 0, 2 }, { 6, 3 }, { 7, 3 }, { 0, 0 } + }, {// 1 x { 8, 4 } + { 1, 2 }, { 2, 2 }, { 0, 0 }, { 0, 2 }, { 6, 3 }, { 7, 3 }, { 0, 0 } + }, {// 1 x 2, 2 x 1 + { 1, 2 }, { 0, 0 }, { 0, 0 }, { 0, 2 }, { 2, 2 }, { 6, 3 }, { 7, 3 } + } + } }; -static const uint8_t size2index[4][4]={ - {-1, 3, 1, 1}, - { 3, 0, 0, 0}, - { 2, 0, 0, 0}, - { 2, 0, 0, 0}, +static const uint8_t size2index[4][4] = { + { -1, 3, 1, 1 }, + { 3, 0, 0, 0 }, + { 2, 0, 0, 0 }, + { 2, 0, 0, 0 }, }; -static const int8_t mv[256][2]={ -{ 0, 0},{ 0, -1},{ -1, 0},{ 1, 0},{ 0, 1},{ -1, -1},{ 1, -1},{ -1, 1}, -{ 1, 1},{ 0, -2},{ -2, 0},{ 2, 0},{ 0, 2},{ -1, -2},{ 1, -2},{ -2, -1}, -{ 2, -1},{ -2, 1},{ 2, 1},{ -1, 2},{ 1, 2},{ -2, -2},{ 2, -2},{ -2, 2}, -{ 2, 2},{ 0, -3},{ -3, 0},{ 3, 0},{ 0, 3},{ -1, -3},{ 1, -3},{ -3, -1}, -{ 3, -1},{ -3, 1},{ 3, 1},{ -1, 3},{ 1, 3},{ -2, -3},{ 2, -3},{ -3, -2}, -{ 3, -2},{ -3, 2},{ 3, 2},{ -2, 3},{ 2, 3},{ 0, -4},{ -4, 0},{ 4, 0}, -{ 0, 4},{ -1, -4},{ 1, -4},{ -4, -1},{ 4, -1},{ 4, 1},{ -1, 4},{ 1, 4}, -{ -3, -3},{ -3, 3},{ 3, 3},{ -2, -4},{ -4, -2},{ 4, -2},{ -4, 2},{ -2, 4}, -{ 2, 4},{ -3, -4},{ 3, -4},{ 4, -3},{ -5, 0},{ -4, 3},{ -3, 4},{ 3, 4}, -{ -1, -5},{ -5, -1},{ -5, 1},{ -1, 5},{ -2, -5},{ 2, -5},{ 5, -2},{ 5, 2}, -{ -4, -4},{ -4, 4},{ -3, -5},{ -5, -3},{ -5, 3},{ 3, 5},{ -6, 0},{ 0, 6}, -{ -6, -1},{ -6, 1},{ 1, 6},{ 2, -6},{ -6, 2},{ 2, 6},{ -5, -4},{ 5, 4}, -{ 4, 5},{ -6, -3},{ 6, 3},{ -7, 0},{ -1, -7},{ 5, -5},{ -7, 1},{ -1, 7}, -{ 4, -6},{ 6, 4},{ -2, -7},{ -7, 2},{ -3, -7},{ 7, -3},{ 3, 7},{ 6, -5}, -{ 0, -8},{ -1, -8},{ -7, -4},{ -8, 1},{ 4, 7},{ 2, -8},{ -2, 8},{ 6, 6}, -{ -8, 3},{ 5, -7},{ -5, 7},{ 8, -4},{ 0, -9},{ -9, -1},{ 1, 9},{ 7, -6}, -{ -7, 6},{ -5, -8},{ -5, 8},{ -9, 3},{ 9, -4},{ 7, -7},{ 8, -6},{ 6, 8}, -{ 10, 1},{-10, 2},{ 9, -5},{ 10, -3},{ -8, -7},{-10, -4},{ 6, -9},{-11, 0}, -{ 11, 1},{-11, -2},{ -2, 11},{ 7, -9},{ -7, 9},{ 10, 6},{ -4, 11},{ 8, -9}, -{ 8, 9},{ 5, 11},{ 7,-10},{ 12, -3},{ 11, 6},{ -9, -9},{ 8, 10},{ 5, 12}, -{-11, 7},{ 13, 2},{ 6,-12},{ 10, 9},{-11, 8},{ -7, 12},{ 0, 14},{ 14, -2}, -{ -9, 11},{ -6, 13},{-14, -4},{ -5,-14},{ 5, 14},{-15, -1},{-14, -6},{ 3,-15}, -{ 11,-11},{ -7, 14},{ -5, 15},{ 8,-14},{ 15, 6},{ 3, 16},{ 7,-15},{-16, 5}, -{ 0, 17},{-16, -6},{-10, 14},{-16, 7},{ 12, 13},{-16, 8},{-17, 6},{-18, 3}, -{ -7, 17},{ 15, 11},{ 16, 10},{ 2,-19},{ 3,-19},{-11,-16},{-18, 8},{-19, -6}, -{ 2,-20},{-17,-11},{-10,-18},{ 8, 19},{-21, -1},{-20, 7},{ -4, 21},{ 21, 5}, -{ 15, 16},{ 2,-22},{-10,-20},{-22, 5},{ 20,-11},{ -7,-22},{-12, 20},{ 23, -5}, -{ 13,-20},{ 24, -2},{-15, 19},{-11, 22},{ 16, 19},{ 23,-10},{-18,-18},{ -9,-24}, -{ 24,-10},{ -3, 26},{-23, 13},{-18,-20},{ 17, 21},{ -4, 27},{ 27, 6},{ 1,-28}, -{-11, 26},{-17,-23},{ 7, 28},{ 11,-27},{ 29, 5},{-23,-19},{-28,-11},{-21, 22}, -{-30, 7},{-17, 26},{-27, 16},{ 13, 29},{ 19,-26},{ 10,-31},{-14,-30},{ 20,-27}, -{-29, 18},{-16,-31},{-28,-22},{ 21,-30},{-25, 28},{ 26,-29},{ 25,-32},{-32,-32} +static const int8_t mv[256][2] = { + { 0, 0 }, { 0, -1 }, { -1, 0 }, { 1, 0 }, { 0, 1 }, { -1, -1 }, { 1, -1 }, { -1, 1 }, + { 1, 1 }, { 0, -2 }, { -2, 0 }, { 2, 0 }, { 0, 2 }, { -1, -2 }, { 1, -2 }, { -2, -1 }, + { 2, -1 }, { -2, 1 }, { 2, 1 }, { -1, 2 }, { 1, 2 }, { -2, -2 }, { 2, -2 }, { -2, 2 }, + { 2, 2 }, { 0, -3 }, { -3, 0 }, { 3, 0 }, { 0, 3 }, { -1, -3 }, { 1, -3 }, { -3, -1 }, + { 3, -1 }, { -3, 1 }, { 3, 1 }, { -1, 3 }, { 1, 3 }, { -2, -3 }, { 2, -3 }, { -3, -2 }, + { 3, -2 }, { -3, 2 }, { 3, 2 }, { -2, 3 }, { 2, 3 }, { 0, -4 }, { -4, 0 }, { 4, 0 }, + { 0, 4 }, { -1, -4 }, { 1, -4 }, { -4, -1 }, { 4, -1 }, { 4, 1 }, { -1, 4 }, { 1, 4 }, + { -3, -3 }, { -3, 3 }, { 3, 3 }, { -2, -4 }, { -4, -2 }, { 4, -2 }, { -4, 2 }, { -2, 4 }, + { 2, 4 }, { -3, -4 }, { 3, -4 }, { 4, -3 }, { -5, 0 }, { -4, 3 }, { -3, 4 }, { 3, 4 }, + { -1, -5 }, { -5, -1 }, { -5, 1 }, { -1, 5 }, { -2, -5 }, { 2, -5 }, { 5, -2 }, { 5, 2 }, + { -4, -4 }, { -4, 4 }, { -3, -5 }, { -5, -3 }, { -5, 3 }, { 3, 5 }, { -6, 0 }, { 0, 6 }, + { -6, -1 }, { -6, 1 }, { 1, 6 }, { 2, -6 }, { -6, 2 }, { 2, 6 }, { -5, -4 }, { 5, 4 }, + { 4, 5 }, { -6, -3 }, { 6, 3 }, { -7, 0 }, { -1, -7 }, { 5, -5 }, { -7, 1 }, { -1, 7 }, + { 4, -6 }, { 6, 4 }, { -2, -7 }, { -7, 2 }, { -3, -7 }, { 7, -3 }, { 3, 7 }, { 6, -5 }, + { 0, -8 }, { -1, -8 }, { -7, -4 }, { -8, 1 }, { 4, 7 }, { 2, -8 }, { -2, 8 }, { 6, 6 }, + { -8, 3 }, { 5, -7 }, { -5, 7 }, { 8, -4 }, { 0, -9 }, { -9, -1 }, { 1, 9 }, { 7, -6 }, + { -7, 6 }, { -5, -8 }, { -5, 8 }, { -9, 3 }, { 9, -4 }, { 7, -7 }, { 8, -6 }, { 6, 8 }, + { 10, 1 }, { -10, 2 }, { 9, -5 }, { 10, -3 }, { -8, -7 }, { -10, -4 }, { 6, -9 }, { -11, 0 }, + { 11, 1 }, { -11, -2 }, { -2, 11 }, { 7, -9 }, { -7, 9 }, { 10, 6 }, { -4, 11 }, { 8, -9 }, + { 8, 9 }, { 5, 11 }, { 7, -10 }, { 12, -3 }, { 11, 6 }, { -9, -9 }, { 8, 10 }, { 5, 12 }, + { -11, 7 }, { 13, 2 }, { 6, -12 }, { 10, 9 }, { -11, 8 }, { -7, 12 }, { 0, 14 }, { 14, -2 }, + { -9, 11 }, { -6, 13 }, { -14, -4 }, { -5, -14 }, { 5, 14 }, { -15, -1 }, { -14, -6 }, { 3, -15 }, + { 11, -11 }, { -7, 14 }, { -5, 15 }, { 8, -14 }, { 15, 6 }, { 3, 16 }, { 7, -15 }, { -16, 5 }, + { 0, 17 }, { -16, -6 }, { -10, 14 }, { -16, 7 }, { 12, 13 }, { -16, 8 }, { -17, 6 }, { -18, 3 }, + { -7, 17 }, { 15, 11 }, { 16, 10 }, { 2, -19 }, { 3, -19 }, { -11, -16 }, { -18, 8 }, { -19, -6 }, + { 2, -20 }, { -17, -11 }, { -10, -18 }, { 8, 19 }, { -21, -1 }, { -20, 7 }, { -4, 21 }, { 21, 5 }, + { 15, 16 }, { 2, -22 }, { -10, -20 }, { -22, 5 }, { 20, -11 }, { -7, -22 }, { -12, 20 }, { 23, -5 }, + { 13, -20 }, { 24, -2 }, { -15, 19 }, { -11, 22 }, { 16, 19 }, { 23, -10 }, { -18, -18 }, { -9, -24 }, + { 24, -10 }, { -3, 26 }, { -23, 13 }, { -18, -20 }, { 17, 21 }, { -4, 27 }, { 27, 6 }, { 1, -28 }, + { -11, 26 }, { -17, -23 }, { 7, 28 }, { 11, -27 }, { 29, 5 }, { -23, -19 }, { -28, -11 }, { -21, 22 }, + { -30, 7 }, { -17, 26 }, { -27, 16 }, { 13, 29 }, { 19, -26 }, { 10, -31 }, { -14, -30 }, { 20, -27 }, + { -29, 18 }, { -16, -31 }, { -28, -22 }, { 21, -30 }, { -25, 28 }, { 26, -29 }, { 25, -32 }, { -32, -32 } }; -// this is simply the scaled down elementwise product of the standard jpeg quantizer table and the AAN premul table -static const uint8_t dequant_table[64]={ - 16, 15, 13, 19, 24, 31, 28, 17, - 17, 23, 25, 31, 36, 63, 45, 21, - 18, 24, 27, 37, 52, 59, 49, 20, - 16, 28, 34, 40, 60, 80, 51, 20, - 18, 31, 48, 66, 68, 86, 56, 21, - 19, 38, 56, 59, 64, 64, 48, 20, - 27, 48, 55, 55, 56, 51, 35, 15, - 20, 35, 34, 32, 31, 22, 15, 8, +/* This is simply the scaled down elementwise product of the standard JPEG + * quantizer table and the AAN premul table. */ +static const uint8_t dequant_table[64] = { + 16, 15, 13, 19, 24, 31, 28, 17, + 17, 23, 25, 31, 36, 63, 45, 21, + 18, 24, 27, 37, 52, 59, 49, 20, + 16, 28, 34, 40, 60, 80, 51, 20, + 18, 31, 48, 66, 68, 86, 56, 21, + 19, 38, 56, 59, 64, 64, 48, 20, + 27, 48, 55, 55, 56, 51, 35, 15, + 20, 35, 34, 32, 31, 22, 15, 8, }; static VLC block_type_vlc[2][4]; -typedef struct CFrameBuffer{ +typedef struct CFrameBuffer { unsigned int allocated_size; unsigned int size; int id; uint8_t *data; -}CFrameBuffer; +} CFrameBuffer; -typedef struct FourXContext{ +typedef struct FourXContext { AVCodecContext *avctx; - DSPContext dsp; - AVFrame current_picture, last_picture; + BlockDSPContext bdsp; + BswapDSPContext bbdsp; + uint16_t *frame_buffer; + uint16_t *last_frame_buffer; GetBitContext pre_gb; ///< ac/dc prefix GetBitContext gb; - const uint8_t *bytestream; - const uint16_t *wordstream; + GetByteContext g; + GetByteContext g2; int mv[256]; VLC pre_vlc; int last_dc; - DECLARE_ALIGNED(16, DCTELEM, block)[6][64]; + DECLARE_ALIGNED(16, int16_t, block)[6][64]; void *bitstream_buffer; unsigned int bitstream_buffer_size; int version; @@ -150,54 +156,55 @@ typedef struct FourXContext{ #define FIX_1_847759065 121095 #define FIX_2_613125930 171254 -#define MULTIPLY(var,const) (((var)*(const)) >> 16) +#define MULTIPLY(var, const) (((var) * (const)) >> 16) -static void idct(DCTELEM block[64]){ +static void idct(int16_t block[64]) +{ int tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7; int tmp10, tmp11, tmp12, tmp13; int z5, z10, z11, z12, z13; int i; int temp[64]; - for(i=0; i<8; i++){ - tmp10 = block[8*0 + i] + block[8*4 + i]; - tmp11 = block[8*0 + i] - block[8*4 + i]; + for (i = 0; i < 8; i++) { + tmp10 = block[8 * 0 + i] + block[8 * 4 + i]; + tmp11 = block[8 * 0 + i] - block[8 * 4 + i]; - tmp13 = block[8*2 + i] + block[8*6 + i]; - tmp12 = MULTIPLY(block[8*2 + i] - block[8*6 + i], FIX_1_414213562) - tmp13; + tmp13 = block[8 * 2 + i] + block[8 * 6 + i]; + tmp12 = MULTIPLY(block[8 * 2 + i] - block[8 * 6 + i], FIX_1_414213562) - tmp13; tmp0 = tmp10 + tmp13; tmp3 = tmp10 - tmp13; tmp1 = tmp11 + tmp12; tmp2 = tmp11 - tmp12; - z13 = block[8*5 + i] + block[8*3 + i]; - z10 = block[8*5 + i] - block[8*3 + i]; - z11 = block[8*1 + i] + block[8*7 + i]; - z12 = block[8*1 + i] - block[8*7 + i]; + z13 = block[8 * 5 + i] + block[8 * 3 + i]; + z10 = block[8 * 5 + i] - block[8 * 3 + i]; + z11 = block[8 * 1 + i] + block[8 * 7 + i]; + z12 = block[8 * 1 + i] - block[8 * 7 + i]; tmp7 = z11 + z13; tmp11 = MULTIPLY(z11 - z13, FIX_1_414213562); z5 = MULTIPLY(z10 + z12, FIX_1_847759065); - tmp10 = MULTIPLY(z12, FIX_1_082392200) - z5; - tmp12 = MULTIPLY(z10, - FIX_2_613125930) + z5; + tmp10 = MULTIPLY(z12, FIX_1_082392200) - z5; + tmp12 = MULTIPLY(z10, -FIX_2_613125930) + z5; tmp6 = tmp12 - tmp7; tmp5 = tmp11 - tmp6; tmp4 = tmp10 + tmp5; - temp[8*0 + i] = tmp0 + tmp7; - temp[8*7 + i] = tmp0 - tmp7; - temp[8*1 + i] = tmp1 + tmp6; - temp[8*6 + i] = tmp1 - tmp6; - temp[8*2 + i] = tmp2 + tmp5; - temp[8*5 + i] = tmp2 - tmp5; - temp[8*4 + i] = tmp3 + tmp4; - temp[8*3 + i] = tmp3 - tmp4; + temp[8 * 0 + i] = tmp0 + tmp7; + temp[8 * 7 + i] = tmp0 - tmp7; + temp[8 * 1 + i] = tmp1 + tmp6; + temp[8 * 6 + i] = tmp1 - tmp6; + temp[8 * 2 + i] = tmp2 + tmp5; + temp[8 * 5 + i] = tmp2 - tmp5; + temp[8 * 4 + i] = tmp3 + tmp4; + temp[8 * 3 + i] = tmp3 - tmp4; } - for(i=0; i<8*8; i+=8){ + for (i = 0; i < 8 * 8; i += 8) { tmp10 = temp[0 + i] + temp[4 + i]; tmp11 = temp[0 + i] - temp[4 + i]; @@ -214,205 +221,255 @@ static void idct(DCTELEM block[64]){ z11 = temp[1 + i] + temp[7 + i]; z12 = temp[1 + i] - temp[7 + i]; - tmp7 = z11 + z13; + tmp7 = z11 + z13; tmp11 = MULTIPLY(z11 - z13, FIX_1_414213562); - z5 = MULTIPLY(z10 + z12, FIX_1_847759065); - tmp10 = MULTIPLY(z12, FIX_1_082392200) - z5; - tmp12 = MULTIPLY(z10, - FIX_2_613125930) + z5; + z5 = MULTIPLY(z10 + z12, FIX_1_847759065); + tmp10 = MULTIPLY(z12, FIX_1_082392200) - z5; + tmp12 = MULTIPLY(z10, -FIX_2_613125930) + z5; tmp6 = tmp12 - tmp7; tmp5 = tmp11 - tmp6; tmp4 = tmp10 + tmp5; - block[0 + i] = (tmp0 + tmp7)>>6; - block[7 + i] = (tmp0 - tmp7)>>6; - block[1 + i] = (tmp1 + tmp6)>>6; - block[6 + i] = (tmp1 - tmp6)>>6; - block[2 + i] = (tmp2 + tmp5)>>6; - block[5 + i] = (tmp2 - tmp5)>>6; - block[4 + i] = (tmp3 + tmp4)>>6; - block[3 + i] = (tmp3 - tmp4)>>6; + block[0 + i] = (tmp0 + tmp7) >> 6; + block[7 + i] = (tmp0 - tmp7) >> 6; + block[1 + i] = (tmp1 + tmp6) >> 6; + block[6 + i] = (tmp1 - tmp6) >> 6; + block[2 + i] = (tmp2 + tmp5) >> 6; + block[5 + i] = (tmp2 - tmp5) >> 6; + block[4 + i] = (tmp3 + tmp4) >> 6; + block[3 + i] = (tmp3 - tmp4) >> 6; } } -static av_cold void init_vlcs(FourXContext *f){ - static VLC_TYPE table[8][32][2]; - int i; - - for(i=0; i<8; i++){ - block_type_vlc[0][i].table= table[i]; - block_type_vlc[0][i].table_allocated= 32; - init_vlc(&block_type_vlc[0][i], BLOCK_TYPE_VLC_BITS, 7, - &block_type_tab[0][i][0][1], 2, 1, - &block_type_tab[0][i][0][0], 2, 1, INIT_VLC_USE_NEW_STATIC); +static av_cold void init_vlcs(FourXContext *f) +{ + static VLC_TYPE table[2][4][32][2]; + int i, j; + + for (i = 0; i < 2; i++) { + for (j = 0; j < 4; j++) { + block_type_vlc[i][j].table = table[i][j]; + block_type_vlc[i][j].table_allocated = 32; + init_vlc(&block_type_vlc[i][j], BLOCK_TYPE_VLC_BITS, 7, + &block_type_tab[i][j][0][1], 2, 1, + &block_type_tab[i][j][0][0], 2, 1, + INIT_VLC_USE_NEW_STATIC); + } } } -static void init_mv(FourXContext *f){ +static void init_mv(FourXContext *f, int linesize) +{ int i; - for(i=0; i<256; i++){ - if(f->version>1) - f->mv[i] = mv[i][0] + mv[i][1] *f->current_picture.linesize[0]/2; + for (i = 0; i < 256; i++) { + if (f->version > 1) + f->mv[i] = mv[i][0] + mv[i][1] * linesize / 2; else - f->mv[i] = (i&15) - 8 + ((i>>4)-8)*f->current_picture.linesize[0]/2; + f->mv[i] = (i & 15) - 8 + ((i >> 4) - 8) * linesize / 2; } } #if HAVE_BIGENDIAN -#define LE_CENTRIC_MUL(dst, src, scale, dc) \ - { \ +#define LE_CENTRIC_MUL(dst, src, scale, dc) \ + { \ unsigned tmpval = AV_RN32(src); \ - tmpval = (tmpval << 16) | (tmpval >> 16); \ + tmpval = (tmpval << 16) | (tmpval >> 16); \ tmpval = tmpval * (scale) + (dc); \ - tmpval = (tmpval << 16) | (tmpval >> 16); \ + tmpval = (tmpval << 16) | (tmpval >> 16); \ AV_WN32A(dst, tmpval); \ } #else -#define LE_CENTRIC_MUL(dst, src, scale, dc) \ - { \ +#define LE_CENTRIC_MUL(dst, src, scale, dc) \ + { \ unsigned tmpval = AV_RN32(src) * (scale) + (dc); \ AV_WN32A(dst, tmpval); \ } #endif -static inline void mcdc(uint16_t *dst, uint16_t *src, int log2w, int h, int stride, int scale, unsigned dc){ - int i; - dc*= 0x10001; - - switch(log2w){ - case 0: - for(i=0; igb, block_type_vlc[1-(f->version>1)][index].table, BLOCK_TYPE_VLC_BITS, 1); - uint16_t *start= (uint16_t*)f->last_picture.data[0]; - uint16_t *end= start + stride*(f->avctx->height-h+1) - (1<=0 && code<=6); - - if(code == 0){ - src += f->mv[ *f->bytestream++ ]; - if(start > src || src > end){ - av_log(f->avctx, AV_LOG_ERROR, "mv out of pic\n"); - return; - } - mcdc(dst, src, log2w, h, stride, 1, 0); - }else if(code == 1){ - log2h--; - decode_p_block(f, dst , src , log2w, log2h, stride); - decode_p_block(f, dst + (stride<gb, block_type_vlc[1 - (f->version > 1)][index].table, + BLOCK_TYPE_VLC_BITS, 1); + if (code < 0 || code > 6) + return AVERROR_INVALIDDATA; + + start = f->last_frame_buffer; + end = start + stride * (f->avctx->height - h + 1) - (1 << log2w); + + if (code == 1) { + if (--log2h < 0) + return AVERROR_INVALIDDATA; + if ((ret = decode_p_block(f, dst, src, log2w, log2h, stride)) < 0) + return ret; + return decode_p_block(f, dst + (stride << log2h), + src + (stride << log2h), + log2w, log2h, stride); + } else if (code == 2) { log2w--; - decode_p_block(f, dst , src , log2w, log2h, stride); - decode_p_block(f, dst + (1<version<2){ - mcdc(dst, src, log2w, h, stride, 1, 0); - }else if(code == 4){ - src += f->mv[ *f->bytestream++ ]; - if(start > src || src > end){ - av_log(f->avctx, AV_LOG_ERROR, "mv out of pic\n"); - return; - } - mcdc(dst, src, log2w, h, stride, 1, av_le2ne16(*f->wordstream++)); - }else if(code == 5){ - mcdc(dst, src, log2w, h, stride, 0, av_le2ne16(*f->wordstream++)); - }else if(code == 6){ - if(log2w){ - dst[0] = av_le2ne16(*f->wordstream++); - dst[1] = av_le2ne16(*f->wordstream++); - }else{ - dst[0 ] = av_le2ne16(*f->wordstream++); - dst[stride] = av_le2ne16(*f->wordstream++); + if ((ret = decode_p_block(f, dst , src, log2w, log2h, stride)) < 0) + return ret; + return decode_p_block(f, dst + (1 << log2w), + src + (1 << log2w), + log2w, log2h, stride); + } else if (code == 6) { + if (log2w) { + dst[0] = bytestream2_get_le16(&f->g2); + dst[1] = bytestream2_get_le16(&f->g2); + } else { + dst[0] = bytestream2_get_le16(&f->g2); + dst[stride] = bytestream2_get_le16(&f->g2); } + return 0; } + + if (code == 0) { + src += f->mv[bytestream2_get_byte(&f->g)]; + } else if (code == 3 && f->version >= 2) { + return 0; + } else if (code == 4) { + src += f->mv[bytestream2_get_byte(&f->g)]; + dc = bytestream2_get_le16(&f->g2); + } else if (code == 5) { + scale = 0; + dc = bytestream2_get_le16(&f->g2); + } + + if (start > src || src > end) { + av_log(f->avctx, AV_LOG_ERROR, "mv out of pic\n"); + return AVERROR_INVALIDDATA; + } + + mcdc(dst, src, log2w, h, stride, scale, dc); + + return 0; } -static int decode_p_frame(FourXContext *f, const uint8_t *buf, int length){ +static int decode_p_frame(FourXContext *f, const uint8_t *buf, int length) +{ int x, y; - const int width= f->avctx->width; - const int height= f->avctx->height; - uint16_t *src= (uint16_t*)f->last_picture.data[0]; - uint16_t *dst= (uint16_t*)f->current_picture.data[0]; - const int stride= f->current_picture.linesize[0]>>1; - unsigned int bitstream_size, bytestream_size, wordstream_size, extra; - - if(f->version>1){ - extra=20; - bitstream_size= AV_RL32(buf+8); - wordstream_size= AV_RL32(buf+12); - bytestream_size= AV_RL32(buf+16); - }else{ - extra=0; - bitstream_size = AV_RL16(buf-4); - wordstream_size= AV_RL16(buf-2); - bytestream_size= FFMAX(length - bitstream_size - wordstream_size, 0); - } - - if(bitstream_size+ bytestream_size+ wordstream_size + extra != length - || bitstream_size > (1<<26) - || bytestream_size > (1<<26) - || wordstream_size > (1<<26) - ){ - av_log(f->avctx, AV_LOG_ERROR, "lengths %d %d %d %d\n", bitstream_size, bytestream_size, wordstream_size, - bitstream_size+ bytestream_size+ wordstream_size - length); - return -1; - } - - av_fast_malloc(&f->bitstream_buffer, &f->bitstream_buffer_size, bitstream_size + FF_INPUT_BUFFER_PADDING_SIZE); - if (!f->bitstream_buffer) - return AVERROR(ENOMEM); - f->dsp.bswap_buf(f->bitstream_buffer, (const uint32_t*)(buf + extra), bitstream_size/4); - memset((uint8_t*)f->bitstream_buffer + bitstream_size, 0, FF_INPUT_BUFFER_PADDING_SIZE); - init_get_bits(&f->gb, f->bitstream_buffer, 8*bitstream_size); - - f->wordstream= (const uint16_t*)(buf + extra + bitstream_size); - f->bytestream= buf + extra + bitstream_size + wordstream_size; + const int width = f->avctx->width; + const int height = f->avctx->height; + uint16_t *dst = f->frame_buffer; + uint16_t *src; + unsigned int bitstream_size, bytestream_size, wordstream_size, extra, + bytestream_offset, wordstream_offset; + int ret; + + src = f->last_frame_buffer; + + if (f->version > 1) { + if (length < 20) + return AVERROR_INVALIDDATA; + extra = 20; + bitstream_size = AV_RL32(buf + 8); + wordstream_size = AV_RL32(buf + 12); + bytestream_size = AV_RL32(buf + 16); + } else { + extra = 0; + bitstream_size = AV_RL16(buf - 4); + wordstream_size = AV_RL16(buf - 2); + bytestream_size = FFMAX(length - bitstream_size - wordstream_size, 0); + } - init_mv(f); + if (bitstream_size + bytestream_size + wordstream_size + extra != length + || bitstream_size > (1 << 26) + || bytestream_size > (1 << 26) + || wordstream_size > (1 << 26)) { + av_log(f->avctx, AV_LOG_ERROR, "lengths %d %d %d %d\n", + bitstream_size, bytestream_size, wordstream_size, + bitstream_size + bytestream_size + wordstream_size - length); + return AVERROR_INVALIDDATA; + } - for(y=0; ybitstream_buffer, &f->bitstream_buffer_size, + bitstream_size + AV_INPUT_BUFFER_PADDING_SIZE); + if (!f->bitstream_buffer) + return AVERROR(ENOMEM); + f->bbdsp.bswap_buf(f->bitstream_buffer, (const uint32_t *) (buf + extra), + bitstream_size / 4); + memset((uint8_t*)f->bitstream_buffer + bitstream_size, + 0, AV_INPUT_BUFFER_PADDING_SIZE); + init_get_bits(&f->gb, f->bitstream_buffer, 8 * bitstream_size); + + wordstream_offset = extra + bitstream_size; + bytestream_offset = extra + bitstream_size + wordstream_size; + bytestream2_init(&f->g2, buf + wordstream_offset, + length - wordstream_offset); + bytestream2_init(&f->g, buf + bytestream_offset, + length - bytestream_offset); + + init_mv(f, width * 2); + + for (y = 0; y < height; y += 8) { + for (x = 0; x < width; x += 8) + if ((ret = decode_p_block(f, dst + x, src + x, 3, 3, width)) < 0) + return ret; + src += 8 * width; + dst += 8 * width; } return 0; @@ -422,24 +479,23 @@ static int decode_p_frame(FourXContext *f, const uint8_t *buf, int length){ * decode block and dequantize. * Note this is almost identical to MJPEG. */ -static int decode_i_block(FourXContext *f, DCTELEM *block){ +static int decode_i_block(FourXContext *f, int16_t *block) +{ int code, i, j, level, val; /* DC coef */ val = get_vlc2(&f->pre_gb, f->pre_vlc.table, ACDC_VLC_BITS, 3); - if (val>>4){ + if (val >> 4) av_log(f->avctx, AV_LOG_ERROR, "error dc run != 0\n"); - } - if(val) + if (val) val = get_xbits(&f->gb, val); - val = val * dequant_table[0] + f->last_dc; - f->last_dc = - block[0] = val; + val = val * dequant_table[0] + f->last_dc; + f->last_dc = block[0] = val; /* AC coefs */ i = 1; - for(;;) { + for (;;) { code = get_vlc2(&f->pre_gb, f->pre_vlc.table, ACDC_VLC_BITS, 3); /* EOB */ @@ -449,13 +505,13 @@ static int decode_i_block(FourXContext *f, DCTELEM *block){ i += 16; } else { level = get_xbits(&f->gb, code & 0xf); - i += code >> 4; + i += code >> 4; if (i >= 64) { av_log(f->avctx, AV_LOG_ERROR, "run %d oveflow\n", i); return 0; } - j= ff_zigzag_direct[i]; + j = ff_zigzag_direct[i]; block[j] = level * dequant_table[j]; i++; if (i >= 64) @@ -466,408 +522,464 @@ static int decode_i_block(FourXContext *f, DCTELEM *block){ return 0; } -static inline void idct_put(FourXContext *f, int x, int y){ - DCTELEM (*block)[64]= f->block; - int stride= f->current_picture.linesize[0]>>1; +static inline void idct_put(FourXContext *f, int x, int y) +{ + int16_t (*block)[64] = f->block; + int stride = f->avctx->width; int i; - uint16_t *dst = ((uint16_t*)f->current_picture.data[0]) + y * stride + x; + uint16_t *dst = f->frame_buffer + y * stride + x; - for(i=0; i<4; i++){ - block[i][0] += 0x80*8*8; + for (i = 0; i < 4; i++) { + block[i][0] += 0x80 * 8 * 8; idct(block[i]); } - if(!(f->avctx->flags&CODEC_FLAG_GRAY)){ - for(i=4; i<6; i++) idct(block[i]); + if (!(f->avctx->flags & AV_CODEC_FLAG_GRAY)) { + for (i = 4; i < 6; i++) + idct(block[i]); } -/* Note transform is: -y= ( 1b + 4g + 2r)/14 -cb=( 3b - 2g - 1r)/14 -cr=(-1b - 4g + 5r)/14 -*/ - for(y=0; y<8; y++){ - for(x=0; x<8; x++){ - DCTELEM *temp= block[(x>>2) + 2*(y>>2)] + 2*(x&3) + 2*8*(y&3); //FIXME optimize - int cb= block[4][x + 8*y]; - int cr= block[5][x + 8*y]; - int cg= (cb + cr)>>1; + /* Note transform is: + * y = ( 1b + 4g + 2r) / 14 + * cb = ( 3b - 2g - 1r) / 14 + * cr = (-1b - 4g + 5r) / 14 */ + for (y = 0; y < 8; y++) { + for (x = 0; x < 8; x++) { + int16_t *temp = block[(x >> 2) + 2 * (y >> 2)] + + 2 * (x & 3) + 2 * 8 * (y & 3); // FIXME optimize + int cb = block[4][x + 8 * y]; + int cr = block[5][x + 8 * y]; + int cg = (cb + cr) >> 1; int y; - cb+=cb; - - y = temp[0]; - dst[0 ]= ((y+cb)>>3) + (((y-cg)&0xFC)<<3) + (((y+cr)&0xF8)<<8); - y = temp[1]; - dst[1 ]= ((y+cb)>>3) + (((y-cg)&0xFC)<<3) + (((y+cr)&0xF8)<<8); - y = temp[8]; - dst[ stride]= ((y+cb)>>3) + (((y-cg)&0xFC)<<3) + (((y+cr)&0xF8)<<8); - y = temp[9]; - dst[1+stride]= ((y+cb)>>3) + (((y-cg)&0xFC)<<3) + (((y+cr)&0xF8)<<8); - dst += 2; + cb += cb; + + y = temp[0]; + dst[0] = ((y + cb) >> 3) + (((y - cg) & 0xFC) << 3) + (((y + cr) & 0xF8) << 8); + y = temp[1]; + dst[1] = ((y + cb) >> 3) + (((y - cg) & 0xFC) << 3) + (((y + cr) & 0xF8) << 8); + y = temp[8]; + dst[stride] = ((y + cb) >> 3) + (((y - cg) & 0xFC) << 3) + (((y + cr) & 0xF8) << 8); + y = temp[9]; + dst[1 + stride] = ((y + cb) >> 3) + (((y - cg) & 0xFC) << 3) + (((y + cr) & 0xF8) << 8); + dst += 2; } - dst += 2*stride - 2*8; + dst += 2 * stride - 2 * 8; } } -static int decode_i_mb(FourXContext *f){ +static int decode_i_mb(FourXContext *f) +{ + int ret; int i; - f->dsp.clear_blocks(f->block[0]); + f->bdsp.clear_blocks(f->block[0]); - for(i=0; i<6; i++){ - if(decode_i_block(f, f->block[i]) < 0) - return -1; - } + for (i = 0; i < 6; i++) + if ((ret = decode_i_block(f, f->block[i])) < 0) + return ret; return 0; } -static const uint8_t *read_huffman_tables(FourXContext *f, const uint8_t * const buf){ - int frequency[512]; +static const uint8_t *read_huffman_tables(FourXContext *f, + const uint8_t * const buf, + int len) +{ + int frequency[512] = { 0 }; uint8_t flag[512]; int up[512]; uint8_t len_tab[257]; int bits_tab[257]; int start, end; - const uint8_t *ptr= buf; + const uint8_t *ptr = buf; int j; - memset(frequency, 0, sizeof(frequency)); memset(up, -1, sizeof(up)); - start= *ptr++; - end= *ptr++; - for(;;){ + start = *ptr++; + end = *ptr++; + for (;;) { int i; - for(i=start; i<=end; i++){ - frequency[i]= *ptr++; - } - start= *ptr++; - if(start==0) break; + len -= end - start + 1; + + if (end < start || len < 0) + return NULL; - end= *ptr++; + for (i = start; i <= end; i++) + frequency[i] = *ptr++; + start = *ptr++; + if (start == 0) + break; + + if (--len < 0) + return NULL; + + end = *ptr++; } - frequency[256]=1; + frequency[256] = 1; - while((ptr - buf)&3) ptr++; // 4byte align + while ((ptr - buf) & 3) + ptr++; // 4byte align - for(j=257; j<512; j++){ - int min_freq[2]= {256*256, 256*256}; - int smallest[2]= {0, 0}; + for (j = 257; j < 512; j++) { + int min_freq[2] = { 256 * 256, 256 * 256 }; + int smallest[2] = { 0, 0 }; int i; - for(i=0; i 31) av_log(f->avctx, AV_LOG_ERROR, "vlc length overflow\n"); //can this happen at all ? + if (len > 31) + // can this happen at all ? + av_log(f->avctx, AV_LOG_ERROR, + "vlc length overflow\n"); } - bits_tab[j]= bits; - len_tab[j]= len; + bits_tab[j] = bits; + len_tab[j] = len; } - if (init_vlc(&f->pre_vlc, ACDC_VLC_BITS, 257, - len_tab , 1, 1, + if (init_vlc(&f->pre_vlc, ACDC_VLC_BITS, 257, len_tab, 1, 1, bits_tab, 4, 4, 0)) return NULL; return ptr; } -static int mix(int c0, int c1){ - int blue = 2*(c0&0x001F) + (c1&0x001F); - int green= (2*(c0&0x03E0) + (c1&0x03E0))>>5; - int red = 2*(c0>>10) + (c1>>10); - return red/3*1024 + green/3*32 + blue/3; +static int mix(int c0, int c1) +{ + int blue = 2 * (c0 & 0x001F) + (c1 & 0x001F); + int green = (2 * (c0 & 0x03E0) + (c1 & 0x03E0)) >> 5; + int red = 2 * (c0 >> 10) + (c1 >> 10); + return red / 3 * 1024 + green / 3 * 32 + blue / 3; } -static int decode_i2_frame(FourXContext *f, const uint8_t *buf, int length){ +static int decode_i2_frame(FourXContext *f, const uint8_t *buf, int length) +{ int x, y, x2, y2; - const int width= f->avctx->width; - const int height= f->avctx->height; - uint16_t *dst= (uint16_t*)f->current_picture.data[0]; - const int stride= f->current_picture.linesize[0]>>1; - - for(y=0; y>2) + 8*(y2>>2); - dst[y2*stride+x2]= color[(bits>>index)&3]; + const int width = f->avctx->width; + const int height = f->avctx->height; + const int mbs = (FFALIGN(width, 16) >> 4) * (FFALIGN(height, 16) >> 4); + uint16_t *dst = f->frame_buffer; + GetByteContext g3; + + if (length < mbs * 8) { + av_log(f->avctx, AV_LOG_ERROR, "packet size too small\n"); + return AVERROR_INVALIDDATA; + } + bytestream2_init(&g3, buf, length); + + for (y = 0; y < height; y += 16) { + for (x = 0; x < width; x += 16) { + unsigned int color[4] = { 0 }, bits; + // warning following is purely guessed ... + color[0] = bytestream2_get_le16u(&g3); + color[1] = bytestream2_get_le16u(&g3); + + if (color[0] & 0x8000) + av_log(f->avctx, AV_LOG_ERROR, "unk bit 1\n"); + if (color[1] & 0x8000) + av_log(f->avctx, AV_LOG_ERROR, "unk bit 2\n"); + + color[2] = mix(color[0], color[1]); + color[3] = mix(color[1], color[0]); + + bits = bytestream2_get_le32u(&g3); + for (y2 = 0; y2 < 16; y2++) { + for (x2 = 0; x2 < 16; x2++) { + int index = 2 * (x2 >> 2) + 8 * (y2 >> 2); + dst[y2 * width + x2] = color[(bits >> index) & 3]; } } - dst+=16; + dst += 16; } - dst += 16*stride - width; + dst += 16 * width - x; } return 0; } -static int decode_i_frame(FourXContext *f, const uint8_t *buf, int length){ - int x, y; - const int width= f->avctx->width; - const int height= f->avctx->height; - uint16_t *dst= (uint16_t*)f->current_picture.data[0]; - const int stride= f->current_picture.linesize[0]>>1; - const unsigned int bitstream_size= AV_RL32(buf); - const int token_count av_unused = AV_RL32(buf + bitstream_size + 8); - unsigned int prestream_size= 4*AV_RL32(buf + bitstream_size + 4); - const uint8_t *prestream= buf + bitstream_size + 12; +static int decode_i_frame(FourXContext *f, const uint8_t *buf, int length) +{ + int x, y, ret; + const int width = f->avctx->width; + const int height = f->avctx->height; + const unsigned int bitstream_size = AV_RL32(buf); + int token_count av_unused; + unsigned int prestream_size; + const uint8_t *prestream; + + if (bitstream_size > (1 << 26)) + return AVERROR_INVALIDDATA; + + if (length < bitstream_size + 12) { + av_log(f->avctx, AV_LOG_ERROR, "packet size too small\n"); + return AVERROR_INVALIDDATA; + } + + token_count = AV_RL32(buf + bitstream_size + 8); + prestream_size = 4 * AV_RL32(buf + bitstream_size + 4); + prestream = buf + bitstream_size + 12; - if(prestream_size + bitstream_size + 12 != length - || bitstream_size > (1<<26) - || prestream_size > (1<<26)){ - av_log(f->avctx, AV_LOG_ERROR, "size mismatch %d %d %d\n", prestream_size, bitstream_size, length); - return -1; + if (prestream_size + bitstream_size + 12 != length + || prestream_size > (1 << 26)) { + av_log(f->avctx, AV_LOG_ERROR, "size mismatch %d %d %d\n", + prestream_size, bitstream_size, length); + return AVERROR_INVALIDDATA; } - prestream= read_huffman_tables(f, prestream); + prestream = read_huffman_tables(f, prestream, prestream_size); + if (!prestream) { + av_log(f->avctx, AV_LOG_ERROR, "Error reading Huffman tables.\n"); + return AVERROR_INVALIDDATA; + } - init_get_bits(&f->gb, buf + 4, 8*bitstream_size); + init_get_bits(&f->gb, buf + 4, 8 * bitstream_size); - prestream_size= length + buf - prestream; + prestream_size = length + buf - prestream; - av_fast_malloc(&f->bitstream_buffer, &f->bitstream_buffer_size, prestream_size + FF_INPUT_BUFFER_PADDING_SIZE); + av_fast_malloc(&f->bitstream_buffer, &f->bitstream_buffer_size, + prestream_size + AV_INPUT_BUFFER_PADDING_SIZE); if (!f->bitstream_buffer) return AVERROR(ENOMEM); - f->dsp.bswap_buf(f->bitstream_buffer, (const uint32_t*)prestream, prestream_size/4); - memset((uint8_t*)f->bitstream_buffer + prestream_size, 0, FF_INPUT_BUFFER_PADDING_SIZE); - init_get_bits(&f->pre_gb, f->bitstream_buffer, 8*prestream_size); + f->bbdsp.bswap_buf(f->bitstream_buffer, (const uint32_t *) prestream, + prestream_size / 4); + memset((uint8_t*)f->bitstream_buffer + prestream_size, + 0, AV_INPUT_BUFFER_PADDING_SIZE); + init_get_bits(&f->pre_gb, f->bitstream_buffer, 8 * prestream_size); - f->last_dc= 0*128*8*8; + f->last_dc = 0 * 128 * 8 * 8; - for(y=0; ypre_gb, f->pre_vlc.table, ACDC_VLC_BITS, 3) != 256) + if (get_vlc2(&f->pre_gb, f->pre_vlc.table, ACDC_VLC_BITS, 3) != 256) av_log(f->avctx, AV_LOG_ERROR, "end mismatch\n"); return 0; } -static int decode_frame(AVCodecContext *avctx, - void *data, int *data_size, - AVPacket *avpkt) +static int decode_frame(AVCodecContext *avctx, void *data, + int *got_frame, AVPacket *avpkt) { - const uint8_t *buf = avpkt->data; - int buf_size = avpkt->size; - FourXContext * const f = avctx->priv_data; - AVFrame *picture = data; - AVFrame *p, temp; - int i, frame_4cc, frame_size; + const uint8_t *buf = avpkt->data; + int buf_size = avpkt->size; + FourXContext *const f = avctx->priv_data; + AVFrame *picture = data; + int i, frame_4cc, frame_size, ret; + + if (buf_size < 20) + return AVERROR_INVALIDDATA; + + if (avctx->width % 16 || avctx->height % 16) { + av_log(avctx, AV_LOG_ERROR, + "Dimensions non-multiple of 16 are invalid.\n"); + return AVERROR_INVALIDDATA; + } - frame_4cc= AV_RL32(buf); - if(buf_size != AV_RL32(buf+4)+8 || buf_size < 20){ - av_log(f->avctx, AV_LOG_ERROR, "size mismatch %d %d\n", buf_size, AV_RL32(buf+4)); + if (buf_size < AV_RL32(buf + 4) + 8) { + av_log(f->avctx, AV_LOG_ERROR, "size mismatch %d %"PRIu32"\n", + buf_size, AV_RL32(buf + 4)); + return AVERROR_INVALIDDATA; } - if(frame_4cc == AV_RL32("cfrm")){ - int free_index=-1; - const int data_size= buf_size - 20; - const int id= AV_RL32(buf+12); - const int whole_size= AV_RL32(buf+16); + frame_4cc = AV_RL32(buf); + + if (frame_4cc == AV_RL32("cfrm")) { + int free_index = -1; + int id, whole_size; + const int data_size = buf_size - 20; CFrameBuffer *cfrm; - for(i=0; icfrm[i].id && f->cfrm[i].id < avctx->frame_number) - av_log(f->avctx, AV_LOG_ERROR, "lost c frame %d\n", f->cfrm[i].id); - } + id = AV_RL32(buf + 12); + whole_size = AV_RL32(buf + 16); - for(i=0; icfrm[i].id == id) break; - if(f->cfrm[i].size == 0 ) free_index= i; - } + for (i = 0; i < CFRAME_BUFFER_COUNT; i++) + if (f->cfrm[i].id && f->cfrm[i].id < avctx->frame_number) + av_log(f->avctx, AV_LOG_ERROR, "lost c frame %d\n", + f->cfrm[i].id); - if(i>=CFRAME_BUFFER_COUNT){ - i= free_index; - f->cfrm[i].id= id; + for (i = 0; i < CFRAME_BUFFER_COUNT; i++) { + if (f->cfrm[i].id == id) + break; + if (f->cfrm[i].size == 0) + free_index = i; } - cfrm= &f->cfrm[i]; - cfrm->data= av_fast_realloc(cfrm->data, &cfrm->allocated_size, cfrm->size + data_size + FF_INPUT_BUFFER_PADDING_SIZE); - if(!cfrm->data){ //explicit check needed as memcpy below might not catch a NULL - av_log(f->avctx, AV_LOG_ERROR, "realloc falure"); - return -1; + if (i >= CFRAME_BUFFER_COUNT) { + i = free_index; + f->cfrm[i].id = id; + } + cfrm = &f->cfrm[i]; + + cfrm->data = av_fast_realloc(cfrm->data, &cfrm->allocated_size, + cfrm->size + data_size + AV_INPUT_BUFFER_PADDING_SIZE); + // explicit check needed as memcpy below might not catch a NULL + if (!cfrm->data) { + av_log(f->avctx, AV_LOG_ERROR, "realloc failure"); + return AVERROR(ENOMEM); } - memcpy(cfrm->data + cfrm->size, buf+20, data_size); + memcpy(cfrm->data + cfrm->size, buf + 20, data_size); cfrm->size += data_size; - if(cfrm->size >= whole_size){ - buf= cfrm->data; - frame_size= cfrm->size; + if (cfrm->size >= whole_size) { + buf = cfrm->data; + frame_size = cfrm->size; - if(id != avctx->frame_number){ - av_log(f->avctx, AV_LOG_ERROR, "cframe id mismatch %d %d\n", id, avctx->frame_number); - } + if (id != avctx->frame_number) + av_log(f->avctx, AV_LOG_ERROR, "cframe id mismatch %d %d\n", + id, avctx->frame_number); - cfrm->size= cfrm->id= 0; - frame_4cc= AV_RL32("pfrm"); - }else + if (f->version <= 1) + return AVERROR_INVALIDDATA; + + cfrm->size = cfrm->id = 0; + frame_4cc = AV_RL32("pfrm"); + } else return buf_size; - }else{ - buf= buf + 12; - frame_size= buf_size - 12; + } else { + buf = buf + 12; + frame_size = buf_size - 12; } - temp= f->current_picture; - f->current_picture= f->last_picture; - f->last_picture= temp; - - p= &f->current_picture; - avctx->coded_frame= p; - - avctx->flags |= CODEC_FLAG_EMU_EDGE; // alternatively we would have to use our own buffer management - if(p->data[0]) - avctx->release_buffer(avctx, p); - - p->reference= 1; - if(avctx->get_buffer(avctx, p) < 0){ + if ((ret = ff_get_buffer(avctx, picture, 0)) < 0) { av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); - return -1; - } - - if(frame_4cc == AV_RL32("ifr2")){ - p->pict_type= AV_PICTURE_TYPE_I; - if(decode_i2_frame(f, buf-4, frame_size) < 0) - return -1; - }else if(frame_4cc == AV_RL32("ifrm")){ - p->pict_type= AV_PICTURE_TYPE_I; - if(decode_i_frame(f, buf, frame_size) < 0) - return -1; - }else if(frame_4cc == AV_RL32("pfrm") || frame_4cc == AV_RL32("pfr2")){ - if(!f->last_picture.data[0]){ - f->last_picture.reference= 1; - if(avctx->get_buffer(avctx, &f->last_picture) < 0){ - av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); - return -1; - } - } + return ret; + } - p->pict_type= AV_PICTURE_TYPE_P; - if(decode_p_frame(f, buf, frame_size) < 0) - return -1; - }else if(frame_4cc == AV_RL32("snd_")){ - av_log(avctx, AV_LOG_ERROR, "ignoring snd_ chunk length:%d\n", buf_size); - }else{ - av_log(avctx, AV_LOG_ERROR, "ignoring unknown chunk length:%d\n", buf_size); + if (frame_4cc == AV_RL32("ifr2")) { + picture->pict_type = AV_PICTURE_TYPE_I; + if ((ret = decode_i2_frame(f, buf - 4, frame_size + 4)) < 0) + return ret; + } else if (frame_4cc == AV_RL32("ifrm")) { + picture->pict_type = AV_PICTURE_TYPE_I; + if ((ret = decode_i_frame(f, buf, frame_size)) < 0) + return ret; + } else if (frame_4cc == AV_RL32("pfrm") || frame_4cc == AV_RL32("pfr2")) { + picture->pict_type = AV_PICTURE_TYPE_P; + if ((ret = decode_p_frame(f, buf, frame_size)) < 0) + return ret; + } else if (frame_4cc == AV_RL32("snd_")) { + av_log(avctx, AV_LOG_ERROR, "ignoring snd_ chunk length:%d\n", + buf_size); + } else { + av_log(avctx, AV_LOG_ERROR, "ignoring unknown chunk length:%d\n", + buf_size); } - p->key_frame= p->pict_type == AV_PICTURE_TYPE_I; + picture->key_frame = picture->pict_type == AV_PICTURE_TYPE_I; + + av_image_copy_plane(picture->data[0], picture->linesize[0], + (const uint8_t*)f->frame_buffer, avctx->width * 2, + avctx->width * 2, avctx->height); + FFSWAP(uint16_t *, f->frame_buffer, f->last_frame_buffer); - *picture= *p; - *data_size = sizeof(AVPicture); + *got_frame = 1; emms_c(); return buf_size; } - -static av_cold void common_init(AVCodecContext *avctx){ +static av_cold int decode_end(AVCodecContext *avctx) +{ FourXContext * const f = avctx->priv_data; + int i; - dsputil_init(&f->dsp, avctx); + av_freep(&f->frame_buffer); + av_freep(&f->last_frame_buffer); + av_freep(&f->bitstream_buffer); + f->bitstream_buffer_size = 0; + for (i = 0; i < CFRAME_BUFFER_COUNT; i++) { + av_freep(&f->cfrm[i].data); + f->cfrm[i].allocated_size = 0; + } + ff_free_vlc(&f->pre_vlc); - f->avctx= avctx; + return 0; } -static av_cold int decode_init(AVCodecContext *avctx){ +static av_cold int decode_init(AVCodecContext *avctx) +{ FourXContext * const f = avctx->priv_data; + int ret; - if(avctx->extradata_size != 4 || !avctx->extradata) { + if (avctx->extradata_size != 4 || !avctx->extradata) { av_log(avctx, AV_LOG_ERROR, "extradata wrong or missing\n"); - return 1; + return AVERROR_INVALIDDATA; } - f->version= AV_RL32(avctx->extradata)>>16; - common_init(avctx); - init_vlcs(f); - - if(f->version>2) avctx->pix_fmt= PIX_FMT_RGB565; - else avctx->pix_fmt= PIX_FMT_BGR555; - - return 0; -} + ret = av_image_check_size(avctx->width, avctx->height, 0, avctx); + if (ret < 0) + return ret; + f->frame_buffer = av_mallocz(avctx->width * avctx->height * 2); + f->last_frame_buffer = av_mallocz(avctx->width * avctx->height * 2); + if (!f->frame_buffer || !f->last_frame_buffer) { + decode_end(avctx); + return AVERROR(ENOMEM); + } -static av_cold int decode_end(AVCodecContext *avctx){ - FourXContext * const f = avctx->priv_data; - int i; + f->version = AV_RL32(avctx->extradata) >> 16; + ff_blockdsp_init(&f->bdsp, avctx); + ff_bswapdsp_init(&f->bbdsp); + f->avctx = avctx; + init_vlcs(f); - av_freep(&f->bitstream_buffer); - f->bitstream_buffer_size=0; - for(i=0; icfrm[i].data); - f->cfrm[i].allocated_size= 0; - } - free_vlc(&f->pre_vlc); - if(f->current_picture.data[0]) - avctx->release_buffer(avctx, &f->current_picture); - if(f->last_picture.data[0]) - avctx->release_buffer(avctx, &f->last_picture); + if (f->version > 2) + avctx->pix_fmt = AV_PIX_FMT_RGB565; + else + avctx->pix_fmt = AV_PIX_FMT_BGR555; return 0; } AVCodec ff_fourxm_decoder = { .name = "4xm", + .long_name = NULL_IF_CONFIG_SMALL("4X Movie"), .type = AVMEDIA_TYPE_VIDEO, - .id = CODEC_ID_4XM, + .id = AV_CODEC_ID_4XM, .priv_data_size = sizeof(FourXContext), .init = decode_init, .close = decode_end, .decode = decode_frame, - .capabilities = CODEC_CAP_DR1, - .long_name = NULL_IF_CONFIG_SMALL("4X Movie"), + .capabilities = AV_CODEC_CAP_DR1, }; -