From b0ca57356e1fa41c630152d45c23964611a0b498 Mon Sep 17 00:00:00 2001 From: Kostya Shishkov Date: Mon, 20 Feb 2006 23:22:02 +0000 Subject: [PATCH] ZMBV 15-/16-/32-bit decoding. 24-bit mode is disabled because it's not implemented in the DosBox/ZMBV codec either. patch by Konstantin "Kostya" Shishkov Originally committed as revision 5041 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/zmbv.c | 255 ++++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 236 insertions(+), 19 deletions(-) diff --git a/libavcodec/zmbv.c b/libavcodec/zmbv.c index 464ce52c62..fd8497dd30 100644 --- a/libavcodec/zmbv.c +++ b/libavcodec/zmbv.c @@ -149,6 +149,80 @@ static int zmbv_decode_xor_8(ZmbvContext *c) return 0; } +/** + * Decode XOR'ed frame - 15bpp and 16bpp version + */ + +static int zmbv_decode_xor_16(ZmbvContext *c) +{ + uint8_t *src = c->decomp_buf; + uint16_t *output, *prev; + int8_t *mvec; + int x, y; + int d, dx, dy, bw2, bh2; + int block; + int i, j; + int mx, my; + + output = (uint16_t*)c->cur; + prev = (uint16_t*)c->prev; + + mvec = (int8_t*)src; + src += ((c->bx * c->by * 2 + 3) & ~3); + + block = 0; + for(y = 0; y < c->height; y += c->bh) { + bh2 = ((c->height - y) > c->bh) ? c->bh : (c->height - y); + for(x = 0; x < c->width; x += c->bw) { + uint16_t *out, *tprev; + + d = mvec[block] & 1; + dx = mvec[block] >> 1; + dy = mvec[block + 1] >> 1; + block += 2; + + bw2 = ((c->width - x) > c->bw) ? c->bw : (c->width - x); + + /* copy block - motion vectors out of bounds are used to zero blocks */ + out = output + x; + tprev = prev + x + dx + dy * c->width; + mx = x + dx; + my = y + dy; + for(j = 0; j < bh2; j++){ + if((my + j < 0) || (my + j >= c->height)) { + memset(out, 0, bw2 * 2); + } else { + for(i = 0; i < bw2; i++){ + if((mx + i < 0) || (mx + i >= c->width)) + out[i] = 0; + else + out[i] = tprev[i]; + } + } + out += c->width; + tprev += c->width; + } + + if(d) { /* apply XOR'ed difference */ + out = output + x; + for(j = 0; j < bh2; j++){ + for(i = 0; i < bw2; i++) { + out[i] ^= *((uint16_t*)src); + src += 2; + } + out += c->width; + } + } + } + output += c->width * c->bh; + prev += c->width * c->bh; + } + if(src - c->decomp_buf != c->decomp_len) + av_log(c->avctx, AV_LOG_ERROR, "Used %i of %i bytes\n", src-c->decomp_buf, c->decomp_len); + return 0; +} + +#ifdef ZMBV_ENABLE_24BPP /** * Decode XOR'ed frame - 24bpp version */ @@ -229,6 +303,80 @@ static int zmbv_decode_xor_24(ZmbvContext *c) av_log(c->avctx, AV_LOG_ERROR, "Used %i of %i bytes\n", src-c->decomp_buf, c->decomp_len); return 0; } +#endif //ZMBV_ENABLE_24BPP + +/** + * Decode XOR'ed frame - 32bpp version + */ + +static int zmbv_decode_xor_32(ZmbvContext *c) +{ + uint8_t *src = c->decomp_buf; + uint32_t *output, *prev; + int8_t *mvec; + int x, y; + int d, dx, dy, bw2, bh2; + int block; + int i, j; + int mx, my; + + output = (uint32_t*)c->cur; + prev = (uint32_t*)c->prev; + + mvec = (int8_t*)src; + src += ((c->bx * c->by * 2 + 3) & ~3); + + block = 0; + for(y = 0; y < c->height; y += c->bh) { + bh2 = ((c->height - y) > c->bh) ? c->bh : (c->height - y); + for(x = 0; x < c->width; x += c->bw) { + uint32_t *out, *tprev; + + d = mvec[block] & 1; + dx = mvec[block] >> 1; + dy = mvec[block + 1] >> 1; + block += 2; + + bw2 = ((c->width - x) > c->bw) ? c->bw : (c->width - x); + + /* copy block - motion vectors out of bounds are used to zero blocks */ + out = output + x; + tprev = prev + x + dx + dy * c->width; + mx = x + dx; + my = y + dy; + for(j = 0; j < bh2; j++){ + if((my + j < 0) || (my + j >= c->height)) { + memset(out, 0, bw2 * 4); + } else { + for(i = 0; i < bw2; i++){ + if((mx + i < 0) || (mx + i >= c->width)) + out[i] = 0; + else + out[i] = tprev[i]; + } + } + out += c->width; + tprev += c->width; + } + + if(d) { /* apply XOR'ed difference */ + out = output + x; + for(j = 0; j < bh2; j++){ + for(i = 0; i < bw2; i++) { + out[i] ^= *((uint32_t*)src); + src += 4; + } + out += c->width; + } + } + } + output += c->width * c->bh; + prev += c->width * c->bh; + } + if(src - c->decomp_buf != c->decomp_len) + av_log(c->avctx, AV_LOG_ERROR, "Used %i of %i bytes\n", src-c->decomp_buf, c->decomp_len); + return 0; +} /** * Decode intraframe @@ -294,7 +442,34 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8 av_log(avctx, AV_LOG_ERROR, "Unsupported compression type %i\n", c->comp); return -1; } - if(c->fmt != ZMBV_FMT_8BPP && c->fmt != ZMBV_FMT_24BPP) { + + switch(c->fmt) { + case ZMBV_FMT_8BPP: + c->bpp = 8; + c->decode_intra = zmbv_decode_intra; + c->decode_xor = zmbv_decode_xor_8; + break; + case ZMBV_FMT_15BPP: + case ZMBV_FMT_16BPP: + c->bpp = 16; + c->decode_intra = zmbv_decode_intra; + c->decode_xor = zmbv_decode_xor_16; + break; +#ifdef ZMBV_ENABLE_24BPP + case ZMBV_FMT_24BPP: + c->bpp = 24; + c->decode_intra = zmbv_decode_intra; + c->decode_xor = zmbv_decode_xor_24; + break; +#endif //ZMBV_ENABLE_24BPP + case ZMBV_FMT_32BPP: + c->bpp = 32; + c->decode_intra = zmbv_decode_intra; + c->decode_xor = zmbv_decode_xor_32; + break; + default: + c->decode_intra = NULL; + c->decode_xor = NULL; av_log(avctx, AV_LOG_ERROR, "Unsupported (for now) format %i\n", c->fmt); return -1; } @@ -308,22 +483,13 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8 av_log(avctx, AV_LOG_ERROR, "BUG! Zlib support not compiled in frame decoder.\n"); return -1; #endif /* CONFIG_ZLIB */ - if(c->fmt == ZMBV_FMT_8BPP) { - c->bpp = 8; - c->decode_intra = zmbv_decode_intra; - c->decode_xor = zmbv_decode_xor_8; - } else { - c->bpp = 24; - c->decode_intra = zmbv_decode_intra; - c->decode_xor = zmbv_decode_xor_24; - } c->cur = av_realloc(c->cur, avctx->width * avctx->height * (c->bpp / 8)); c->prev = av_realloc(c->prev, avctx->width * avctx->height * (c->bpp / 8)); c->bx = (c->width + c->bw - 1) / c->bw; c->by = (c->height+ c->bh - 1) / c->bh; } - if(c->fmt == 0) { + if(c->decode_intra == NULL) { av_log(avctx, AV_LOG_ERROR, "Error! Got no format or no keyframe!\n"); return -1; } @@ -362,16 +528,67 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8 out = c->pic.data[0]; src = c->cur; - for(j = 0; j < c->height; j++) { - for(i = 0; i < c->width; i++) { - out[i * 3 + 0] = c->pal[(*src) * 3 + 0]; - out[i * 3 + 1] = c->pal[(*src) * 3 + 1]; - out[i * 3 + 2] = c->pal[(*src) * 3 + 2]; - *src++; + switch(c->fmt) { + case ZMBV_FMT_8BPP: + for(j = 0; j < c->height; j++) { + for(i = 0; i < c->width; i++) { + out[i * 3 + 0] = c->pal[(*src) * 3 + 0]; + out[i * 3 + 1] = c->pal[(*src) * 3 + 1]; + out[i * 3 + 2] = c->pal[(*src) * 3 + 2]; + *src++; + } + out += c->pic.linesize[0]; } - out += c->pic.linesize[0]; + break; + case ZMBV_FMT_15BPP: + for(j = 0; j < c->height; j++) { + for(i = 0; i < c->width; i++) { + uint16_t tmp = LE_16(src); + src += 2; + out[i * 3 + 0] = (tmp & 0x7C00) >> 7; + out[i * 3 + 1] = (tmp & 0x03E0) >> 2; + out[i * 3 + 2] = (tmp & 0x001F) << 3; + } + out += c->pic.linesize[0]; + } + break; + case ZMBV_FMT_16BPP: + for(j = 0; j < c->height; j++) { + for(i = 0; i < c->width; i++) { + uint16_t tmp = LE_16(src); + src += 2; + out[i * 3 + 0] = (tmp & 0xF800) >> 8; + out[i * 3 + 1] = (tmp & 0x07E0) >> 3; + out[i * 3 + 2] = (tmp & 0x001F) << 3; + } + out += c->pic.linesize[0]; + } + break; +#ifdef ZMBV_ENABLE_24BPP + case ZMBV_FMT_24BPP: + for(j = 0; j < c->height; j++) { + memcpy(out, src, c->width * 3); + src += c->width * 3; + out += c->pic.linesize[0]; + } + break; +#endif //ZMBV_ENABLE_24BPP + case ZMBV_FMT_32BPP: + for(j = 0; j < c->height; j++) { + for(i = 0; i < c->width; i++) { + uint32_t tmp = LE_32(src); + src += 4; + out[i * 3 + 0] = tmp >> 16; + out[i * 3 + 1] = tmp >> 8; + out[i * 3 + 2] = tmp >> 0; + } + out += c->pic.linesize[0]; + } + break; + default: + av_log(avctx, AV_LOG_ERROR, "Cannot handle format %i\n", c->fmt); } - memcpy(c->prev, c->cur, c->width * c->height); + memcpy(c->prev, c->cur, c->width * c->height * (c->bpp / 8)); } *data_size = sizeof(AVFrame); *(AVFrame*)data = c->pic;