From 08c2d8f0aa679c2f060721d1d0d4f33d2ae32368 Mon Sep 17 00:00:00 2001 From: Kostya Shishkov Date: Fri, 10 Apr 2015 12:14:27 +0200 Subject: Go2Meeting decoder ELS and ePIC decoder courtesy of Maxim Poliakovski, cleanup and integration by Diego Biurrun. Signed-off-by: Diego Biurrun Signed-off-by: Luca Barbato --- libavcodec/g2meet.c | 755 ++++++++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 732 insertions(+), 23 deletions(-) (limited to 'libavcodec/g2meet.c') diff --git a/libavcodec/g2meet.c b/libavcodec/g2meet.c index b3d2bc4aba..d0b36f0ea8 100644 --- a/libavcodec/g2meet.c +++ b/libavcodec/g2meet.c @@ -1,6 +1,7 @@ /* - * Go2Webinar decoder + * Go2Webinar / Go2Meeting decoder * Copyright (c) 2012 Konstantin Shishkov + * Copyright (c) 2013 Maxim Poliakovski * * This file is part of Libav. * @@ -21,7 +22,7 @@ /** * @file - * Go2Webinar decoder + * Go2Webinar / Go2Meeting decoder */ #include @@ -32,12 +33,16 @@ #include "avcodec.h" #include "blockdsp.h" #include "bytestream.h" +#include "elsdec.h" #include "get_bits.h" #include "idctdsp.h" #include "internal.h" #include "jpegtables.h" #include "mjpeg.h" +#define EPIC_PIX_STACK_SIZE 1024 +#define EPIC_PIX_STACK_MAX (EPIC_PIX_STACK_SIZE - 1) + enum ChunkType { DISPLAY_INFO = 0xC8, TILE_DATA, @@ -74,6 +79,42 @@ static const uint8_t chroma_quant[64] = { 50, 50, 50, 50, 50, 50, 50, 50, }; +typedef struct ePICPixListElem { + struct ePICPixListElem *next; + uint32_t pixel; + uint8_t rung; +} ePICPixListElem; + +typedef struct ePICPixHashElem { + uint32_t pix_id; + struct ePICPixListElem *list; +} ePICPixHashElem; + +#define EPIC_HASH_SIZE 256 +typedef struct ePICPixHash { + ePICPixHashElem *bucket[EPIC_HASH_SIZE]; + int bucket_size[EPIC_HASH_SIZE]; + int bucket_fill[EPIC_HASH_SIZE]; +} ePICPixHash; + +typedef struct ePICContext { + ElsDecCtx els_ctx; + int next_run_pos; + ElsUnsignedRung unsigned_rung; + uint8_t W_flag_rung; + uint8_t N_flag_rung; + uint8_t W_ctx_rung[256]; + uint8_t N_ctx_rung[512]; + uint8_t nw_pred_rung[256]; + uint8_t ne_pred_rung[256]; + uint8_t prev_row_rung[14]; + uint8_t runlen_zeroes[14]; + uint8_t runlen_one; + int stack_pos; + uint32_t stack[EPIC_PIX_STACK_SIZE]; + ePICPixHash hash; +} ePICContext; + typedef struct JPGContext { BlockDSPContext bdsp; IDCTDSPContext idsp; @@ -87,7 +128,9 @@ typedef struct JPGContext { } JPGContext; typedef struct G2MContext { + ePICContext ec; JPGContext jc; + int version; int compression; @@ -101,8 +144,9 @@ typedef struct G2MContext { uint8_t *framebuf; int framebuf_stride, old_width, old_height; - uint8_t *synth_tile, *jpeg_tile; - int tile_stride, old_tile_w, old_tile_h; + uint8_t *synth_tile, *jpeg_tile, *epic_buf, *epic_buf_base; + int tile_stride, epic_buf_stride, old_tile_w, old_tile_h; + int swapuv; uint8_t *kempf_buf, *kempf_flags; @@ -229,11 +273,11 @@ static int jpg_decode_block(JPGContext *c, GetBitContext *gb, return 0; } -static inline void yuv2rgb(uint8_t *out, int Y, int U, int V) +static inline void yuv2rgb(uint8_t *out, int ridx, int Y, int U, int V) { - out[0] = av_clip_uint8(Y + ( 91881 * V + 32768 >> 16)); - out[1] = av_clip_uint8(Y + (-22554 * U - 46802 * V + 32768 >> 16)); - out[2] = av_clip_uint8(Y + (116130 * U + 32768 >> 16)); + out[ridx] = av_clip_uint8(Y + (91881 * V + 32768 >> 16)); + out[1] = av_clip_uint8(Y + (-22554 * U - 46802 * V + 32768 >> 16)); + out[2 - ridx] = av_clip_uint8(Y + (116130 * U + 32768 >> 16)); } static int jpg_decode_data(JPGContext *c, int width, int height, @@ -247,6 +291,7 @@ static int jpg_decode_data(JPGContext *c, int width, int height, int bx, by; int unesc_size; int ret; + const int ridx = swapuv ? 2 : 0; if ((ret = av_reallocp(&c->buf, src_size + FF_INPUT_BUFFER_PADDING_SIZE)) < 0) @@ -298,9 +343,9 @@ static int jpg_decode_data(JPGContext *c, int width, int height, int Y, U, V; Y = c->block[(j >> 3) * 2 + (i >> 3)][(i & 7) + (j & 7) * 8]; - U = c->block[4 ^ swapuv][(i >> 1) + (j >> 1) * 8] - 128; - V = c->block[5 ^ swapuv][(i >> 1) + (j >> 1) * 8] - 128; - yuv2rgb(out + i * 3, Y, U, V); + U = c->block[4][(i >> 1) + (j >> 1) * 8] - 128; + V = c->block[5][(i >> 1) + (j >> 1) * 8] - 128; + yuv2rgb(out + i * 3, ridx, Y, U, V); } } @@ -317,6 +362,659 @@ static int jpg_decode_data(JPGContext *c, int width, int height, return 0; } +#define LOAD_NEIGHBOURS(x) \ + W = curr_row[(x) - 1]; \ + N = above_row[(x)]; \ + WW = curr_row[(x) - 2]; \ + NW = above_row[(x) - 1]; \ + NE = above_row[(x) + 1]; \ + NN = above2_row[(x)]; \ + NNW = above2_row[(x) - 1]; \ + NWW = above_row[(x) - 2]; \ + NNE = above2_row[(x) + 1] + +#define UPDATE_NEIGHBOURS(x) \ + NNW = NN; \ + NN = NNE; \ + NWW = NW; \ + NW = N; \ + N = NE; \ + NE = above_row[(x) + 1]; \ + NNE = above2_row[(x) + 1] + +#define R_shift 16 +#define G_shift 8 +#define B_shift 0 + +static inline int log2_ceil(uint32_t x) +{ + int c = 0; + + for (--x; x > 0; x >>= 1) + c++; + + return c; +} + +/* improved djb2 hash from http://www.cse.yorku.ca/~oz/hash.html */ +static int djb2_hash(uint32_t key) +{ + int h = 5381; + + h = (h * 33) ^ ((key >> 24) & 0xFF); // xxx: probably not needed at all + h = (h * 33) ^ ((key >> 16) & 0xFF); + h = (h * 33) ^ ((key >> 8) & 0xFF); + h = (h * 33) ^ (key & 0xFF); + + return h & (EPIC_HASH_SIZE - 1); +} + +static void epic_hash_init(ePICPixHash *hash) +{ + memset(hash, 0, sizeof(*hash)); +} + +static ePICPixHashElem *epic_hash_find(const ePICPixHash *hash, uint32_t key) +{ + int i, idx = djb2_hash(key); + ePICPixHashElem *bucket = hash->bucket[idx]; + + for (i = 0; i < hash->bucket_fill[idx]; i++) + if (bucket[i].pix_id == key) + return &bucket[i]; + + return NULL; +} + +static ePICPixHashElem *epic_hash_add(ePICPixHash *hash, uint32_t key) +{ + ePICPixHashElem *bucket, *ret; + int idx = djb2_hash(key); + + if (hash->bucket_size[idx] > INT_MAX / sizeof(**hash->bucket)) + return NULL; + + if (!(hash->bucket_fill[idx] < hash->bucket_size[idx])) { + int new_size = hash->bucket_size[idx] + 16; + bucket = av_realloc(hash->bucket[idx], new_size * sizeof(*bucket)); + if (!bucket) + return NULL; + hash->bucket[idx] = bucket; + hash->bucket_size[idx] = new_size; + } + + ret = &hash->bucket[idx][hash->bucket_fill[idx]++]; + memset(ret, 0, sizeof(*ret)); + ret->pix_id = key; + return ret; +} + +static int epic_add_pixel_to_cache(ePICPixHash *hash, uint32_t key, uint32_t pix) +{ + ePICPixListElem *new_elem; + ePICPixHashElem *hash_elem = epic_hash_find(hash, key); + + if (!hash_elem) { + if (!(hash_elem = epic_hash_add(hash, key))) + return AVERROR(ENOMEM); + } + + new_elem = av_mallocz(sizeof(*new_elem)); + if (!new_elem) + return AVERROR(ENOMEM); + + new_elem->pixel = pix; + new_elem->next = hash_elem->list; + hash_elem->list = new_elem; + + return 0; +} + +static inline int epic_cache_entries_for_pixel(const ePICPixHash *hash, + uint32_t pix) +{ + ePICPixHashElem *hash_elem = epic_hash_find(hash, pix); + + if (hash_elem != NULL && hash_elem->list != NULL) + return 1; + + return 0; +} + +static void epic_free_pixel_cache(ePICPixHash *hash) +{ + int i, j; + + for (i = 0; i < EPIC_HASH_SIZE; i++) { + for (j = 0; j < hash->bucket_fill[i]; j++) { + ePICPixListElem *list_elem = hash->bucket[i][j].list; + while (list_elem) { + ePICPixListElem *tmp = list_elem->next; + av_free(list_elem); + list_elem = tmp; + } + } + av_freep(&hash->bucket[i]); + hash->bucket_size[i] = + hash->bucket_fill[i] = 0; + } +} + +static inline int is_pixel_on_stack(const ePICContext *dc, uint32_t pix) +{ + int i; + + for (i = 0; i < dc->stack_pos; i++) + if (dc->stack[i] == pix) + break; + + return i != dc->stack_pos; +} + +#define TOSIGNED(val) (((val) >> 1) ^ -((val) & 1)) + +static inline int epic_decode_component_pred(ePICContext *dc, + int N, int W, int NW) +{ + unsigned delta = ff_els_decode_unsigned(&dc->els_ctx, &dc->unsigned_rung); + return mid_pred(N, N + W - NW, W) - TOSIGNED(delta); +} + +static uint32_t epic_decode_pixel_pred(ePICContext *dc, int x, int y, + const uint32_t *curr_row, + const uint32_t *above_row) +{ + uint32_t N, W, NW, pred; + unsigned delta; + int GN, GW, GNW, R, G, B; + + if (x && y) { + W = curr_row[x - 1]; + N = above_row[x]; + NW = above_row[x - 1]; + + GN = (N >> G_shift) & 0xFF; + GW = (W >> G_shift) & 0xFF; + GNW = (NW >> G_shift) & 0xFF; + + G = epic_decode_component_pred(dc, GN, GW, GNW); + + R = G + epic_decode_component_pred(dc, + ((N >> R_shift) & 0xFF) - GN, + ((W >> R_shift) & 0xFF) - GW, + ((NW >> R_shift) & 0xFF) - GNW); + + B = G + epic_decode_component_pred(dc, + ((N >> B_shift) & 0xFF) - GN, + ((W >> B_shift) & 0xFF) - GW, + ((NW >> B_shift) & 0xFF) - GNW); + } else { + if (x) + pred = curr_row[x - 1]; + else + pred = above_row[x]; + + delta = ff_els_decode_unsigned(&dc->els_ctx, &dc->unsigned_rung); + R = ((pred >> R_shift) & 0xFF) - TOSIGNED(delta); + + delta = ff_els_decode_unsigned(&dc->els_ctx, &dc->unsigned_rung); + G = ((pred >> G_shift) & 0xFF) - TOSIGNED(delta); + + delta = ff_els_decode_unsigned(&dc->els_ctx, &dc->unsigned_rung); + B = ((pred >> B_shift) & 0xFF) - TOSIGNED(delta); + } + + return (R << R_shift) | (G << G_shift) | (B << B_shift); +} + +static int epic_predict_pixel(ePICContext *dc, uint8_t *rung, + uint32_t *pPix, uint32_t pix) +{ + if (!ff_els_decode_bit(&dc->els_ctx, rung)) { + *pPix = pix; + return 1; + } + dc->stack[dc->stack_pos++ & EPIC_PIX_STACK_MAX] = pix; + return 0; +} + +static int epic_handle_edges(ePICContext *dc, int x, int y, + const uint32_t *curr_row, + const uint32_t *above_row, uint32_t *pPix) +{ + uint32_t pix; + + if (!x && !y) { /* special case: top-left pixel */ + /* the top-left pixel is coded independently with 3 unsigned numbers */ + *pPix = (ff_els_decode_unsigned(&dc->els_ctx, &dc->unsigned_rung) << R_shift) | + (ff_els_decode_unsigned(&dc->els_ctx, &dc->unsigned_rung) << G_shift) | + (ff_els_decode_unsigned(&dc->els_ctx, &dc->unsigned_rung) << B_shift); + return 1; + } + + if (x) { /* predict from W first */ + pix = curr_row[x - 1]; + if (epic_predict_pixel(dc, &dc->W_flag_rung, pPix, pix)) + return 1; + } + + if (y) { /* then try to predict from N */ + pix = above_row[x]; + if (!dc->stack_pos || dc->stack[0] != pix) { + if (epic_predict_pixel(dc, &dc->N_flag_rung, pPix, pix)) + return 1; + } + } + + return 0; +} + +static int epic_decode_run_length(ePICContext *dc, int x, int y, int tile_width, + const uint32_t *curr_row, + const uint32_t *above_row, + const uint32_t *above2_row, + uint32_t *pPix, int *pRun) +{ + int idx, got_pixel = 0, WWneW, old_WWneW = 0; + uint32_t W, WW, N, NN, NW, NE, NWW, NNW, NNE; + + *pRun = 0; + + LOAD_NEIGHBOURS(x); + + if (dc->next_run_pos == x) { + /* can't reuse W for the new pixel in this case */ + WWneW = 1; + } else { + idx = (WW != W) << 7 | + (NW != W) << 6 | + (N != NE) << 5 | + (NW != N) << 4 | + (NWW != NW) << 3 | + (NNE != NE) << 2 | + (NN != N) << 1 | + (NNW != NW); + WWneW = ff_els_decode_bit(&dc->els_ctx, &dc->W_ctx_rung[idx]); + } + + if (WWneW) + dc->stack[dc->stack_pos++ & EPIC_PIX_STACK_MAX] = W; + else { + *pPix = W; + got_pixel = 1; + } + + do { + int NWneW = 1; + if (got_pixel) // pixel value already known (derived from either W or N) + NWneW = *pPix != N; + else { // pixel value is unknown and will be decoded later + NWneW = *pRun ? NWneW : NW != W; + + /* TODO: RFC this mess! */ + switch (((NW != N) << 2) | (NWneW << 1) | WWneW) { + case 0: + break; // do nothing here + case 3: + case 5: + case 6: + case 7: + if (!is_pixel_on_stack(dc, N)) { + idx = WWneW << 8 | + (*pRun ? old_WWneW : WW != W) << 7 | + NWneW << 6 | + (N != NE) << 5 | + (NW != N) << 4 | + (NWW != NW) << 3 | + (NNE != NE) << 2 | + (NN != N) << 1 | + (NNW != NW); + if (!ff_els_decode_bit(&dc->els_ctx, &dc->N_ctx_rung[idx])) { + NWneW = 0; + *pPix = N; + got_pixel = 1; + break; + } + } + /* fall through */ + default: + NWneW = 1; + old_WWneW = WWneW; + if (!is_pixel_on_stack(dc, N)) + dc->stack[dc->stack_pos++ & EPIC_PIX_STACK_MAX] = N; + } + } + + (*pRun)++; + if (x + *pRun >= tile_width - 1) + break; + + UPDATE_NEIGHBOURS(x + *pRun); + + if (!NWneW && NW == N && N == NE) { + int pos, run, rle; + int start_pos = x + *pRun; + + /* scan for a run of pix in the line above */ + uint32_t pix = above_row[start_pos + 1]; + for (pos = start_pos + 2; pos < tile_width; pos++) + if (!(above_row[pos] == pix)) + break; + run = pos - start_pos - 1; + idx = log2_ceil(run); + if (ff_els_decode_bit(&dc->els_ctx, &dc->prev_row_rung[idx])) + *pRun += run; + else { + int flag; + /* run-length is coded as plain binary number of idx - 1 bits */ + for (pos = idx - 1, rle = 0, flag = 0; pos >= 0; pos--) { + if ((1 << pos) + rle < run && + ff_els_decode_bit(&dc->els_ctx, + flag ? &dc->runlen_one + : &dc->runlen_zeroes[pos])) { + flag = 1; + rle |= 1 << pos; + } + } + *pRun += rle; + break; // return immediately + } + if (x + *pRun >= tile_width - 1) + break; + + LOAD_NEIGHBOURS(x + *pRun); + WWneW = 0; + NWneW = 0; + } + + idx = WWneW << 7 | + NWneW << 6 | + (N != NE) << 5 | + (NW != N) << 4 | + (NWW != NW) << 3 | + (NNE != NE) << 2 | + (NN != N) << 1 | + (NNW != NW); + WWneW = ff_els_decode_bit(&dc->els_ctx, &dc->W_ctx_rung[idx]); + } while (!WWneW); + + dc->next_run_pos = x + *pRun; + return got_pixel; +} + +static int epic_predict_pixel2(ePICContext *dc, uint8_t *rung, + uint32_t *pPix, uint32_t pix) +{ + if (ff_els_decode_bit(&dc->els_ctx, rung)) { + *pPix = pix; + return 1; + } + dc->stack[dc->stack_pos++ & EPIC_PIX_STACK_MAX] = pix; + return 0; +} + +static int epic_predict_from_NW_NE(ePICContext *dc, int x, int y, int run, + int tile_width, const uint32_t *curr_row, + const uint32_t *above_row, uint32_t *pPix) +{ + int pos; + + /* try to reuse the NW pixel first */ + if (x && y) { + uint32_t NW = above_row[x - 1]; + if (NW != curr_row[x - 1] && NW != above_row[x] && !is_pixel_on_stack(dc, NW)) { + if (epic_predict_pixel2(dc, &dc->nw_pred_rung[NW & 0xFF], pPix, NW)) + return 1; + } + } + + /* try to reuse the NE[x + run, y] pixel */ + pos = x + run - 1; + if (pos < tile_width - 1 && y) { + uint32_t NE = above_row[pos + 1]; + if (NE != above_row[pos] && !is_pixel_on_stack(dc, NE)) { + if (epic_predict_pixel2(dc, &dc->ne_pred_rung[NE & 0xFF], pPix, NE)) + return 1; + } + } + + return 0; +} + +static int epic_decode_from_cache(ePICContext *dc, uint32_t W, uint32_t *pPix) +{ + ePICPixListElem *list, *prev = NULL; + ePICPixHashElem *hash_elem = epic_hash_find(&dc->hash, W); + + if (!hash_elem || !hash_elem->list) + return 0; + + list = hash_elem->list; + while (list) { + if (!is_pixel_on_stack(dc, list->pixel)) { + if (ff_els_decode_bit(&dc->els_ctx, &list->rung)) { + *pPix = list->pixel; + if (list != hash_elem->list) { + prev->next = list->next; + list->next = hash_elem->list; + hash_elem->list = list; + } + return 1; + } + dc->stack[dc->stack_pos++ & EPIC_PIX_STACK_MAX] = list->pixel; + } + prev = list; + list = list->next; + } + + return 0; +} + +static int epic_decode_tile(ePICContext *dc, uint8_t *out, int tile_height, + int tile_width, int stride) +{ + int x, y; + uint32_t pix; + uint32_t *curr_row = NULL, *above_row = NULL, *above2_row; + + for (y = 0; y < tile_height; y++, out += stride) { + above2_row = above_row; + above_row = curr_row; + curr_row = (uint32_t *) out; + + for (x = 0, dc->next_run_pos = 0; x < tile_width;) { + if (dc->els_ctx.err) + return AVERROR_INVALIDDATA; // bail out in the case of ELS overflow + + pix = curr_row[x - 1]; // get W pixel + + if (y >= 1 && x >= 2 && + pix != curr_row[x - 2] && pix != above_row[x - 1] && + pix != above_row[x - 2] && pix != above_row[x] && + !epic_cache_entries_for_pixel(&dc->hash, pix)) { + curr_row[x] = epic_decode_pixel_pred(dc, x, y, curr_row, above_row); + x++; + } else { + int got_pixel, run; + dc->stack_pos = 0; // empty stack + + if (y < 2 || x < 2 || x == tile_width - 1) { + run = 1; + got_pixel = epic_handle_edges(dc, x, y, curr_row, above_row, &pix); + } else + got_pixel = epic_decode_run_length(dc, x, y, tile_width, + curr_row, above_row, + above2_row, &pix, &run); + + if (!got_pixel && !epic_predict_from_NW_NE(dc, x, y, run, + tile_width, curr_row, + above_row, &pix)) { + uint32_t ref_pix = curr_row[x - 1]; + if (!x || !epic_decode_from_cache(dc, ref_pix, &pix)) { + pix = epic_decode_pixel_pred(dc, x, y, curr_row, above_row); + if (x) { + int ret = epic_add_pixel_to_cache(&dc->hash, + ref_pix, + pix); + if (ret) + return ret; + } + } + } + for (; run > 0; x++, run--) + curr_row[x] = pix; + } + } + } + + return 0; +} + +static int epic_jb_decode_tile(G2MContext *c, int tile_x, int tile_y, + const uint8_t *src, size_t src_size, + AVCodecContext *avctx) +{ + uint8_t prefix, mask = 0x80; + int extrabytes, tile_width, tile_height, awidth, aheight; + size_t els_dsize; + uint8_t *dst; + + if (!src_size) + return 0; + + /* get data size of the ELS partition as unsigned variable-length integer */ + prefix = *src++; + src_size--; + for (extrabytes = 0; (prefix & mask) && (extrabytes < 7); extrabytes++) + mask >>= 1; + if (extrabytes > 3 || src_size < extrabytes) { + av_log(avctx, AV_LOG_ERROR, "ePIC: invalid data size VLI\n"); + return AVERROR_INVALIDDATA; + } + + els_dsize = prefix & ((0x80 >> extrabytes) - 1); // mask out the length prefix + while (extrabytes-- > 0) { + els_dsize = (els_dsize << 8) | *src++; + src_size--; + } + + if (src_size < els_dsize) { + av_log(avctx, AV_LOG_ERROR, "ePIC: data too short, needed %zu, got %zu\n", + els_dsize, src_size); + return AVERROR_INVALIDDATA; + } + + tile_width = FFMIN(c->width - tile_x * c->tile_width, c->tile_width); + tile_height = FFMIN(c->height - tile_y * c->tile_height, c->tile_height); + awidth = FFALIGN(tile_width, 16); + aheight = FFALIGN(tile_height, 16); + + if (els_dsize) { + int ret, i, j, k; + uint8_t tr_r, tr_g, tr_b, *buf; + uint32_t *in; + /* ELS decoder initializations */ + memset(&c->ec, 0, sizeof(c->ec)); + ff_els_decoder_init(&c->ec.els_ctx, src, els_dsize); + epic_hash_init(&c->ec.hash); + + /* decode transparent pixel value */ + tr_r = ff_els_decode_unsigned(&c->ec.els_ctx, &c->ec.unsigned_rung); + tr_g = ff_els_decode_unsigned(&c->ec.els_ctx, &c->ec.unsigned_rung); + tr_b = ff_els_decode_unsigned(&c->ec.els_ctx, &c->ec.unsigned_rung); + if (c->ec.els_ctx.err != 0) { + av_log(avctx, AV_LOG_ERROR, + "ePIC: couldn't decode transparency pixel!\n"); + return AVERROR_INVALIDDATA; + } + + ret = epic_decode_tile(&c->ec, c->epic_buf, tile_height, tile_width, + c->epic_buf_stride); + + epic_free_pixel_cache(&c->ec.hash); + ff_els_decoder_uninit(&c->ec.unsigned_rung); + + if (ret) { + av_log(avctx, AV_LOG_ERROR, + "ePIC: tile decoding failed, frame=%d, tile_x=%d, tile_y=%d\n", + avctx->frame_number, tile_x, tile_y); + return AVERROR_INVALIDDATA; + } + + buf = c->epic_buf; + dst = c->framebuf + tile_x * c->tile_width * 3 + + tile_y * c->tile_height * c->framebuf_stride; + + for (j = 0; j < tile_height; j++) { + uint8_t *out = dst; + in = (uint32_t *) buf; + for (i = 0; i < tile_width; i++) { + out[0] = (in[i] >> R_shift) & 0xFF; + out[1] = (in[i] >> G_shift) & 0xFF; + out[2] = (in[i] >> B_shift) & 0xFF; + out += 3; + } + buf += c->epic_buf_stride; + dst += c->framebuf_stride; + } + + if (src_size > els_dsize) { + uint8_t *jpg; + uint32_t tr; + int bstride = FFALIGN(tile_width, 16) >> 3; + int nblocks = 0; + int estride = c->epic_buf_stride >> 2; + + src += els_dsize; + src_size -= els_dsize; + + in = (uint32_t *) c->epic_buf; + tr = (tr_r << R_shift) | (tr_g << G_shift) | (tr_b << B_shift); + + memset(c->kempf_flags, 0, + (aheight >> 3) * bstride * sizeof(*c->kempf_flags)); + for (j = 0; j < tile_height; j += 8) { + for (i = 0; i < tile_width; i += 8) { + c->kempf_flags[(i >> 3) + (j >> 3) * bstride] = 0; + for (k = 0; k < 8 * 8; k++) { + if (in[i + (k & 7) + (k >> 3) * estride] == tr) { + c->kempf_flags[(i >> 3) + (j >> 3) * bstride] = 1; + nblocks++; + break; + } + } + } + in += 8 * estride; + } + + memset(c->jpeg_tile, 0, c->tile_stride * aheight); + jpg_decode_data(&c->jc, awidth, aheight, src, src_size, + c->jpeg_tile, c->tile_stride, + c->kempf_flags, bstride, nblocks, c->swapuv); + + in = (uint32_t *) c->epic_buf; + dst = c->framebuf + tile_x * c->tile_width * 3 + + tile_y * c->tile_height * c->framebuf_stride; + jpg = c->jpeg_tile; + for (j = 0; j < tile_height; j++) { + for (i = 0; i < tile_width; i++) + if (in[i] == tr) + memcpy(dst + i * 3, jpg + i * 3, 3); + in += c->epic_buf_stride >> 2; + dst += c->framebuf_stride; + jpg += c->tile_stride; + } + } + } else { + dst = c->framebuf + tile_x * c->tile_width * 3 + + tile_y * c->tile_height * c->framebuf_stride; + return jpg_decode_data(&c->jc, tile_width, tile_height, src, src_size, + dst, c->framebuf_stride, NULL, 0, 0, c->swapuv); + } + + return 0; +} + static void kempf_restore_buf(const uint8_t *src, int len, uint8_t *dst, int stride, const uint8_t *jpeg_tile, int tile_stride, @@ -325,6 +1023,7 @@ static void kempf_restore_buf(const uint8_t *src, int len, { GetBitContext gb; int i, j, nb, col; + int align_width = FFALIGN(width, 16); init_get_bits(&gb, src, len * 8); @@ -343,6 +1042,7 @@ static void kempf_restore_buf(const uint8_t *src, int len, else memcpy(dst + i * 3, jpeg_tile + i * 3, 3); } + skip_bits_long(&gb, nb * (align_width - width)); } } @@ -466,22 +1166,31 @@ static int g2m_init_buffers(G2MContext *c) return AVERROR(ENOMEM); } if (!c->synth_tile || !c->jpeg_tile || + (c->compression == 2 && !c->epic_buf_base) || c->old_tile_w < c->tile_width || c->old_tile_h < c->tile_height) { - c->tile_stride = FFALIGN(c->tile_width * 3, 16); - aligned_height = FFALIGN(c->tile_height, 16); + c->tile_stride = FFALIGN(c->tile_width * 3, 16); + c->epic_buf_stride = FFALIGN(c->tile_width * 4, 16); + aligned_height = FFALIGN(c->tile_height, 16); av_free(c->synth_tile); av_free(c->jpeg_tile); av_free(c->kempf_buf); av_free(c->kempf_flags); + av_free(c->epic_buf_base); c->synth_tile = av_mallocz(c->tile_stride * aligned_height); c->jpeg_tile = av_mallocz(c->tile_stride * aligned_height); - c->kempf_buf = av_mallocz((c->tile_width + 1) * aligned_height - + FF_INPUT_BUFFER_PADDING_SIZE); - c->kempf_flags = av_mallocz( c->tile_width * aligned_height); + c->kempf_buf = av_mallocz((c->tile_width + 1) * aligned_height + + FF_INPUT_BUFFER_PADDING_SIZE); + c->kempf_flags = av_mallocz(c->tile_width * aligned_height); if (!c->synth_tile || !c->jpeg_tile || !c->kempf_buf || !c->kempf_flags) return AVERROR(ENOMEM); + if (c->compression == 2) { + c->epic_buf_base = av_mallocz(c->epic_buf_stride * aligned_height + 4); + if (!c->epic_buf_base) + return AVERROR(ENOMEM); + c->epic_buf = c->epic_buf_base + 4; + } } return 0; @@ -690,10 +1399,7 @@ static int g2m_decode_frame(AVCodecContext *avctx, void *data, return AVERROR_INVALIDDATA; } - if ((magic & 0xF) < 4) { - av_log(avctx, AV_LOG_ERROR, "G2M2 and G2M3 are not yet supported\n"); - return AVERROR(ENOSYS); - } + c->swapuv = magic == MKBETAG('G', '2', 'M', '2'); while (bytestream2_get_bytes_left(&bc) > 5) { chunk_size = bytestream2_get_le32(&bc) - 1; @@ -795,9 +1501,10 @@ static int g2m_decode_frame(AVCodecContext *avctx, void *data, ret = 0; switch (c->compression) { case COMPR_EPIC_J_B: - av_log(avctx, AV_LOG_ERROR, - "ePIC j-b compression is not implemented yet\n"); - return AVERROR(ENOSYS); + ret = epic_jb_decode_tile(c, c->tile_x, c->tile_y, + buf + bytestream2_tell(&bc), + chunk_size - 2, avctx); + break; case COMPR_KEMPF_J_B: ret = kempf_decode_tile(c, c->tile_x, c->tile_y, buf + bytestream2_tell(&bc), @@ -895,6 +1602,7 @@ static av_cold int g2m_decode_end(AVCodecContext *avctx) jpg_free_context(&c->jc); + av_freep(&c->epic_buf_base); av_freep(&c->kempf_buf); av_freep(&c->kempf_flags); av_freep(&c->synth_tile); @@ -915,4 +1623,5 @@ AVCodec ff_g2m_decoder = { .close = g2m_decode_end, .decode = g2m_decode_frame, .capabilities = CODEC_CAP_DR1, + .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, }; -- cgit v1.2.3