static int encode_frame(AVCodecContext * avctx, AVPacket *pkt, const AVFrame *pict, int *got_packet) { TiffEncoderContext *s = avctx->priv_data; AVFrame *const p = &s->picture; int i; uint8_t *ptr; uint8_t *offset; uint32_t strips; uint32_t *strip_sizes = NULL; uint32_t *strip_offsets = NULL; int bytes_per_row; uint32_t res[2] = { 72, 1 }; // image resolution (72/1) uint16_t bpp_tab[] = { 8, 8, 8, 8 }; int ret; int is_yuv = 0; uint8_t *yuv_line = NULL; int shift_h, shift_v; const AVPixFmtDescriptor* pfd; s->avctx = avctx; *p = *pict; p->pict_type = AV_PICTURE_TYPE_I; p->key_frame = 1; avctx->coded_frame= &s->picture; s->width = avctx->width; s->height = avctx->height; s->subsampling[0] = 1; s->subsampling[1] = 1; switch (avctx->pix_fmt) { case PIX_FMT_RGB48LE: case PIX_FMT_GRAY16LE: case PIX_FMT_RGB24: case PIX_FMT_GRAY8: case PIX_FMT_PAL8: pfd = &av_pix_fmt_descriptors[avctx->pix_fmt]; s->bpp = av_get_bits_per_pixel(pfd); if (pfd->flags & PIX_FMT_PAL) { s->photometric_interpretation = 3; } else if (pfd->flags & PIX_FMT_RGB) { s->photometric_interpretation = 2; } else { s->photometric_interpretation = 1; } s->bpp_tab_size = pfd->nb_components; for (i = 0; i < s->bpp_tab_size; i++) { bpp_tab[i] = s->bpp / s->bpp_tab_size; } break; case PIX_FMT_MONOBLACK: s->bpp = 1; s->photometric_interpretation = 1; s->bpp_tab_size = 0; break; case PIX_FMT_MONOWHITE: s->bpp = 1; s->photometric_interpretation = 0; s->bpp_tab_size = 0; break; case PIX_FMT_YUV420P: case PIX_FMT_YUV422P: case PIX_FMT_YUV444P: case PIX_FMT_YUV410P: case PIX_FMT_YUV411P: s->photometric_interpretation = 6; avcodec_get_chroma_sub_sample(avctx->pix_fmt, &shift_h, &shift_v); s->bpp = 8 + (16 >> (shift_h + shift_v)); s->subsampling[0] = 1 << shift_h; s->subsampling[1] = 1 << shift_v; s->bpp_tab_size = 3; is_yuv = 1; break; default: av_log(s->avctx, AV_LOG_ERROR, "This colors format is not supported\n"); return -1; } if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE || s->compr == TIFF_LZW) //best choose for DEFLATE s->rps = s->height; else s->rps = FFMAX(8192 / (((s->width * s->bpp) >> 3) + 1), 1); // suggest size of strip s->rps = ((s->rps - 1) / s->subsampling[1] + 1) * s->subsampling[1]; // round rps up strips = (s->height - 1) / s->rps + 1; if (!pkt->data && (ret = av_new_packet(pkt, avctx->width * avctx->height * s->bpp * 2 + avctx->height * 4 + FF_MIN_BUFFER_SIZE)) < 0) { av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n"); return ret; } ptr = pkt->data; s->buf_start = pkt->data; s->buf = &ptr; s->buf_size = pkt->size; if (check_size(s, 8)) goto fail; // write header bytestream_put_le16(&ptr, 0x4949); bytestream_put_le16(&ptr, 42); offset = ptr; bytestream_put_le32(&ptr, 0); strip_sizes = av_mallocz(sizeof(*strip_sizes) * strips); strip_offsets = av_mallocz(sizeof(*strip_offsets) * strips); bytes_per_row = (((s->width - 1)/s->subsampling[0] + 1) * s->bpp * s->subsampling[0] * s->subsampling[1] + 7) >> 3; if (is_yuv){ yuv_line = av_malloc(bytes_per_row); if (yuv_line == NULL){ av_log(s->avctx, AV_LOG_ERROR, "Not enough memory\n"); goto fail; } } #if CONFIG_ZLIB if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE) { uint8_t *zbuf; int zlen, zn; int j; zlen = bytes_per_row * s->rps; zbuf = av_malloc(zlen); strip_offsets[0] = ptr - pkt->data; zn = 0; for (j = 0; j < s->rps; j++) { if (is_yuv){ pack_yuv(s, yuv_line, j); memcpy(zbuf + zn, yuv_line, bytes_per_row); j += s->subsampling[1] - 1; } else memcpy(zbuf + j * bytes_per_row, p->data[0] + j * p->linesize[0], bytes_per_row); zn += bytes_per_row; } ret = encode_strip(s, zbuf, ptr, zn, s->compr); av_free(zbuf); if (ret < 0) { av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n"); goto fail; } ptr += ret; strip_sizes[0] = ptr - pkt->data - strip_offsets[0]; } else #endif { if(s->compr == TIFF_LZW) s->lzws = av_malloc(ff_lzw_encode_state_size); for (i = 0; i < s->height; i++) { if (strip_sizes[i / s->rps] == 0) { if(s->compr == TIFF_LZW){ ff_lzw_encode_init(s->lzws, ptr, s->buf_size - (*s->buf - s->buf_start), 12, FF_LZW_TIFF, put_bits); } strip_offsets[i / s->rps] = ptr - pkt->data; } if (is_yuv){ pack_yuv(s, yuv_line, i); ret = encode_strip(s, yuv_line, ptr, bytes_per_row, s->compr); i += s->subsampling[1] - 1; } else ret = encode_strip(s, p->data[0] + i * p->linesize[0], ptr, bytes_per_row, s->compr); if (ret < 0) { av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n"); goto fail; } strip_sizes[i / s->rps] += ret; ptr += ret; if(s->compr == TIFF_LZW && (i==s->height-1 || i%s->rps == s->rps-1)){ ret = ff_lzw_encode_flush(s->lzws, flush_put_bits); strip_sizes[(i / s->rps )] += ret ; ptr += ret; } } if(s->compr == TIFF_LZW) av_free(s->lzws); } s->num_entries = 0; add_entry1(s,TIFF_SUBFILE, TIFF_LONG, 0); add_entry1(s,TIFF_WIDTH, TIFF_LONG, s->width); add_entry1(s,TIFF_HEIGHT, TIFF_LONG, s->height); if (s->bpp_tab_size) add_entry(s, TIFF_BPP, TIFF_SHORT, s->bpp_tab_size, bpp_tab); add_entry1(s,TIFF_COMPR, TIFF_SHORT, s->compr); add_entry1(s,TIFF_INVERT, TIFF_SHORT, s->photometric_interpretation); add_entry(s, TIFF_STRIP_OFFS, TIFF_LONG, strips, strip_offsets); if (s->bpp_tab_size) add_entry1(s,TIFF_SAMPLES_PER_PIXEL, TIFF_SHORT, s->bpp_tab_size); add_entry1(s,TIFF_ROWSPERSTRIP, TIFF_LONG, s->rps); add_entry(s, TIFF_STRIP_SIZE, TIFF_LONG, strips, strip_sizes); add_entry(s, TIFF_XRES, TIFF_RATIONAL, 1, res); add_entry(s, TIFF_YRES, TIFF_RATIONAL, 1, res); add_entry1(s,TIFF_RES_UNIT, TIFF_SHORT, 2); if(!(avctx->flags & CODEC_FLAG_BITEXACT)) add_entry(s, TIFF_SOFTWARE_NAME, TIFF_STRING, strlen(LIBAVCODEC_IDENT) + 1, LIBAVCODEC_IDENT); if (avctx->pix_fmt == PIX_FMT_PAL8) { uint16_t pal[256 * 3]; for (i = 0; i < 256; i++) { uint32_t rgb = *(uint32_t *) (p->data[1] + i * 4); pal[i] = ((rgb >> 16) & 0xff) * 257; pal[i + 256] = ((rgb >> 8 ) & 0xff) * 257; pal[i + 512] = ( rgb & 0xff) * 257; } add_entry(s, TIFF_PAL, TIFF_SHORT, 256 * 3, pal); } if (is_yuv){ /** according to CCIR Recommendation 601.1 */ uint32_t refbw[12] = {15, 1, 235, 1, 128, 1, 240, 1, 128, 1, 240, 1}; add_entry(s, TIFF_YCBCR_SUBSAMPLING, TIFF_SHORT, 2, s->subsampling); add_entry(s, TIFF_REFERENCE_BW, TIFF_RATIONAL, 6, refbw); } bytestream_put_le32(&offset, ptr - pkt->data); // write offset to dir if (check_size(s, 6 + s->num_entries * 12)) { ret = AVERROR(EINVAL); goto fail; } bytestream_put_le16(&ptr, s->num_entries); // write tag count bytestream_put_buffer(&ptr, s->entries, s->num_entries * 12); bytestream_put_le32(&ptr, 0); pkt->size = ptr - pkt->data; pkt->flags |= AV_PKT_FLAG_KEY; *got_packet = 1; fail: av_free(strip_sizes); av_free(strip_offsets); av_free(yuv_line); return ret; }