static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt) { AVFrame *frame = data; const uint8_t *buf = avpkt->data; int buf_size = avpkt->size; ZmbvContext * const c = avctx->priv_data; int zret = Z_OK; // Zlib return code int len = buf_size; int hi_ver, lo_ver, ret; uint8_t *tmp; if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) { av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); return ret; } /* parse header */ c->flags = buf[0]; buf++; len--; if (c->flags & ZMBV_KEYFRAME) { hi_ver = buf[0]; lo_ver = buf[1]; c->comp = buf[2]; c->fmt = buf[3]; c->bw = buf[4]; c->bh = buf[5]; c->decode_intra = NULL; c->decode_xor = NULL; buf += 6; len -= 6; av_log(avctx, AV_LOG_DEBUG, "Flags=%X ver=%i.%i comp=%i fmt=%i blk=%ix%i\n", c->flags,hi_ver,lo_ver,c->comp,c->fmt,c->bw,c->bh); if (hi_ver != 0 || lo_ver != 1) { avpriv_request_sample(avctx, "Version %i.%i", hi_ver, lo_ver); return AVERROR_PATCHWELCOME; } if (c->bw == 0 || c->bh == 0) { avpriv_request_sample(avctx, "Block size %ix%i", c->bw, c->bh); return AVERROR_PATCHWELCOME; } if (c->comp != 0 && c->comp != 1) { avpriv_request_sample(avctx, "Compression type %i", c->comp); return AVERROR_PATCHWELCOME; } 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; avpriv_request_sample(avctx, "Format %i", c->fmt); return AVERROR_PATCHWELCOME; } zret = inflateReset(&c->zstream); if (zret != Z_OK) { av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret); return AVERROR_UNKNOWN; } tmp = av_realloc(c->cur, avctx->width * avctx->height * (c->bpp / 8)); if (!tmp) return AVERROR(ENOMEM); c->cur = tmp; tmp = av_realloc(c->prev, avctx->width * avctx->height * (c->bpp / 8)); if (!tmp) return AVERROR(ENOMEM); c->prev = tmp; c->bx = (c->width + c->bw - 1) / c->bw; c->by = (c->height + c->bh - 1) / c->bh; } if (c->decode_intra == NULL) { av_log(avctx, AV_LOG_ERROR, "Error! Got no format or no keyframe!\n"); return AVERROR_INVALIDDATA; } if (c->comp == 0) { //Uncompressed data if (c->decomp_size < len) { av_log(avctx, AV_LOG_ERROR, "Buffer too small\n"); return AVERROR_INVALIDDATA; } memcpy(c->decomp_buf, buf, len); } else { // ZLIB-compressed data c->zstream.total_in = c->zstream.total_out = 0; c->zstream.next_in = buf; c->zstream.avail_in = len; c->zstream.next_out = c->decomp_buf; c->zstream.avail_out = c->decomp_size; zret = inflate(&c->zstream, Z_SYNC_FLUSH); if (zret != Z_OK && zret != Z_STREAM_END) { av_log(avctx, AV_LOG_ERROR, "inflate error %d\n", zret); return AVERROR_INVALIDDATA; } c->decomp_len = c->zstream.total_out; } if (c->flags & ZMBV_KEYFRAME) { frame->key_frame = 1; frame->pict_type = AV_PICTURE_TYPE_I; c->decode_intra(c); } else { frame->key_frame = 0; frame->pict_type = AV_PICTURE_TYPE_P; if (c->decomp_len) c->decode_xor(c); } /* update frames */ { uint8_t *out, *src; int i, j; out = frame->data[0]; src = c->cur; 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 += frame->linesize[0]; } break; case ZMBV_FMT_15BPP: for (j = 0; j < c->height; j++) { for (i = 0; i < c->width; i++) { uint16_t tmp = AV_RL16(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 += frame->linesize[0]; } break; case ZMBV_FMT_16BPP: for (j = 0; j < c->height; j++) { for (i = 0; i < c->width; i++) { uint16_t tmp = AV_RL16(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 += frame->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 += frame->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 = AV_RL32(src); src += 4; AV_WB24(out+(i*3), tmp); } out += frame->linesize[0]; } break; default: av_log(avctx, AV_LOG_ERROR, "Cannot handle format %i\n", c->fmt); } FFSWAP(uint8_t *, c->cur, c->prev); } *got_frame = 1; /* always report that the buffer was completely consumed */ return buf_size; }