/* * Copyright (c) 2015-2016 Kieran Kunhya * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * Cineform HD video decoder */ #include "libavutil/attributes.h" #include "libavutil/buffer.h" #include "libavutil/common.h" #include "libavutil/imgutils.h" #include "libavutil/intreadwrite.h" #include "libavutil/opt.h" #include "avcodec.h" #include "bytestream.h" #include "get_bits.h" #include "internal.h" #include "thread.h" #include "cfhd.h" #define ALPHA_COMPAND_DC_OFFSET 256 #define ALPHA_COMPAND_GAIN 9400 enum CFHDParam { ChannelCount = 12, SubbandCount = 14, ImageWidth = 20, ImageHeight = 21, LowpassPrecision = 35, SubbandNumber = 48, Quantization = 53, ChannelNumber = 62, SampleFlags = 68, BitsPerComponent = 101, ChannelWidth = 104, ChannelHeight = 105, PrescaleShift = 109, }; static av_cold int cfhd_init(AVCodecContext *avctx) { CFHDContext *s = avctx->priv_data; avctx->bits_per_raw_sample = 10; s->avctx = avctx; return ff_cfhd_init_vlcs(s); } static void init_plane_defaults(CFHDContext *s) { s->subband_num = 0; s->level = 0; s->subband_num_actual = 0; } static void init_peak_table_defaults(CFHDContext *s) { s->peak.level = 0; s->peak.offset = 0; memset(&s->peak.base, 0, sizeof(s->peak.base)); } static void init_frame_defaults(CFHDContext *s) { s->coded_width = 0; s->coded_height = 0; s->cropped_height = 0; s->bpc = 10; s->channel_cnt = 4; s->subband_cnt = SUBBAND_COUNT; s->channel_num = 0; s->lowpass_precision = 16; s->quantisation = 1; s->wavelet_depth = 3; s->pshift = 1; s->codebook = 0; s->difference_coding = 0; s->progressive = 0; init_plane_defaults(s); init_peak_table_defaults(s); } /* TODO: merge with VLC tables or use LUT */ static inline int dequant_and_decompand(int level, int quantisation, int codebook) { if (codebook == 0 || codebook == 1) { int64_t abslevel = abs(level); if (level < 264) return (abslevel + ((768 * abslevel * abslevel * abslevel) / (255 * 255 * 255))) * FFSIGN(level) * quantisation; else return level * quantisation; } else return level * quantisation; } static inline void difference_coding(int16_t *band, int width, int height) { int i,j; for (i = 0; i < height; i++) { for (j = 1; j < width; j++) { band[j] += band[j-1]; } band += width; } } static inline void peak_table(int16_t *band, Peak *peak, int length) { int i; for (i = 0; i < length; i++) if (abs(band[i]) > peak->level) band[i] = bytestream2_get_le16(&peak->base); } static inline void process_alpha(int16_t *alpha, int width) { int i, channel; for (i = 0; i < width; i++) { channel = alpha[i]; channel -= ALPHA_COMPAND_DC_OFFSET; channel <<= 3; channel *= ALPHA_COMPAND_GAIN; channel >>= 16; channel = av_clip_uintp2(channel, 12); alpha[i] = channel; } } static inline void filter(int16_t *output, ptrdiff_t out_stride, int16_t *low, ptrdiff_t low_stride, int16_t *high, ptrdiff_t high_stride, int len, int clip) { int16_t tmp; int i; for (i = 0; i < len; i++) { if (i == 0) { tmp = (11*low[0*low_stride] - 4*low[1*low_stride] + low[2*low_stride] + 4) >> 3; output[(2*i+0)*out_stride] = (tmp + high[0*high_stride]) >> 1; if (clip) output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip); tmp = ( 5*low[0*low_stride] + 4*low[1*low_stride] - low[2*low_stride] + 4) >> 3; output[(2*i+1)*out_stride] = (tmp - high[0*high_stride]) >> 1; if (clip) output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip); } else if (i == len-1) { tmp = ( 5*low[i*low_stride] + 4*low[(i-1)*low_stride] - low[(i-2)*low_stride] + 4) >> 3; output[(2*i+0)*out_stride] = (tmp + high[i*high_stride]) >> 1; if (clip) output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip); tmp = (11*low[i*low_stride] - 4*low[(i-1)*low_stride] + low[(i-2)*low_stride] + 4) >> 3; output[(2*i+1)*out_stride] = (tmp - high[i*high_stride]) >> 1; if (clip) output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip); } else { tmp = (low[(i-1)*low_stride] - low[(i+1)*low_stride] + 4) >> 3; output[(2*i+0)*out_stride] = (tmp + low[i*low_stride] + high[i*high_stride]) >> 1; if (clip) output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip); tmp = (low[(i+1)*low_stride] - low[(i-1)*low_stride] + 4) >> 3; output[(2*i+1)*out_stride] = (tmp + low[i*low_stride] - high[i*high_stride]) >> 1; if (clip) output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip); } } } static inline void interlaced_vertical_filter(int16_t *output, int16_t *low, int16_t *high, int width, int linesize, int plane) { int i; int16_t even, odd; for (i = 0; i < width; i++) { even = (low[i] - high[i])/2; odd = (low[i] + high[i])/2; output[i] = av_clip_uintp2(even, 10); output[i + linesize] = av_clip_uintp2(odd, 10); } } static void horiz_filter(int16_t *output, int16_t *low, int16_t *high, int width) { filter(output, 1, low, 1, high, 1, width, 0); } static void horiz_filter_clip(int16_t *output, int16_t *low, int16_t *high, int width, int clip) { filter(output, 1, low, 1, high, 1, width, clip); } static void vert_filter(int16_t *output, ptrdiff_t out_stride, int16_t *low, ptrdiff_t low_stride, int16_t *high, ptrdiff_t high_stride, int len) { filter(output, out_stride, low, low_stride, high, high_stride, len, 0); } static void free_buffers(CFHDContext *s) { int i, j; for (i = 0; i < FF_ARRAY_ELEMS(s->plane); i++) { av_freep(&s->plane[i].idwt_buf); av_freep(&s->plane[i].idwt_tmp); for (j = 0; j < 9; j++) s->plane[i].subband[j] = NULL; for (j = 0; j < 8; j++) s->plane[i].l_h[j] = NULL; } s->a_height = 0; s->a_width = 0; } static int alloc_buffers(AVCodecContext *avctx) { CFHDContext *s = avctx->priv_data; int i, j, ret, planes; int chroma_x_shift, chroma_y_shift; unsigned k; if ((ret = ff_set_dimensions(avctx, s->coded_width, s->coded_height)) < 0) return ret; avctx->pix_fmt = s->coded_format; if ((ret = av_pix_fmt_get_chroma_sub_sample(s->coded_format, &chroma_x_shift, &chroma_y_shift)) < 0) return ret; planes = av_pix_fmt_count_planes(s->coded_format); for (i = 0; i < planes; i++) { int w8, h8, w4, h4, w2, h2; int width = i ? avctx->width >> chroma_x_shift : avctx->width; int height = i ? avctx->height >> chroma_y_shift : avctx->height; ptrdiff_t stride = FFALIGN(width / 8, 8) * 8; if (chroma_y_shift) height = FFALIGN(height / 8, 2) * 8; s->plane[i].width = width; s->plane[i].height = height; s->plane[i].stride = stride; w8 = FFALIGN(s->plane[i].width / 8, 8); h8 = height / 8; w4 = w8 * 2; h4 = h8 * 2; w2 = w4 * 2; h2 = h4 * 2; s->plane[i].idwt_buf = av_mallocz_array(height * stride, sizeof(*s->plane[i].idwt_buf)); s->plane[i].idwt_tmp = av_malloc_array(height * stride, sizeof(*s->plane[i].idwt_tmp)); if (!s->plane[i].idwt_buf || !s->plane[i].idwt_tmp) return AVERROR(ENOMEM); s->plane[i].subband[0] = s->plane[i].idwt_buf; s->plane[i].subband[1] = s->plane[i].idwt_buf + 2 * w8 * h8; s->plane[i].subband[2] = s->plane[i].idwt_buf + 1 * w8 * h8; s->plane[i].subband[3] = s->plane[i].idwt_buf + 3 * w8 * h8; s->plane[i].subband[4] = s->plane[i].idwt_buf + 2 * w4 * h4; s->plane[i].subband[5] = s->plane[i].idwt_buf + 1 * w4 * h4; s->plane[i].subband[6] = s->plane[i].idwt_buf + 3 * w4 * h4; s->plane[i].subband[7] = s->plane[i].idwt_buf + 2 * w2 * h2; s->plane[i].subband[8] = s->plane[i].idwt_buf + 1 * w2 * h2; s->plane[i].subband[9] = s->plane[i].idwt_buf + 3 * w2 * h2; for (j = 0; j < DWT_LEVELS; j++) { for (k = 0; k < FF_ARRAY_ELEMS(s->plane[i].band[j]); k++) { s->plane[i].band[j][k].a_width = w8 << j; s->plane[i].band[j][k].a_height = h8 << j; } } /* ll2 and ll1 commented out because they are done in-place */ s->plane[i].l_h[0] = s->plane[i].idwt_tmp; s->plane[i].l_h[1] = s->plane[i].idwt_tmp + 2 * w8 * h8; // s->plane[i].l_h[2] = ll2; s->plane[i].l_h[3] = s->plane[i].idwt_tmp; s->plane[i].l_h[4] = s->plane[i].idwt_tmp + 2 * w4 * h4; // s->plane[i].l_h[5] = ll1; s->plane[i].l_h[6] = s->plane[i].idwt_tmp; s->plane[i].l_h[7] = s->plane[i].idwt_tmp + 2 * w2 * h2; } s->a_height = s->coded_height; s->a_width = s->coded_width; s->a_format = s->coded_format; return 0; } static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt) { CFHDContext *s = avctx->priv_data; GetByteContext gb; ThreadFrame frame = { .f = data }; AVFrame *pic = data; int ret = 0, i, j, planes, plane, got_buffer = 0; int16_t *coeff_data; s->coded_format = AV_PIX_FMT_YUV422P10; init_frame_defaults(s); planes = av_pix_fmt_count_planes(s->coded_format); bytestream2_init(&gb, avpkt->data, avpkt->size); while (bytestream2_get_bytes_left(&gb) > 4) { /* Bit weird but implement the tag parsing as the spec says */ uint16_t tagu = bytestream2_get_be16(&gb); int16_t tag = (int16_t)tagu; int8_t tag8 = (int8_t)(tagu >> 8); uint16_t abstag = abs(tag); int8_t abs_tag8 = abs(tag8); uint16_t data = bytestream2_get_be16(&gb); if (abs_tag8 >= 0x60 && abs_tag8 <= 0x6f) { av_log(avctx, AV_LOG_DEBUG, "large len %x\n", ((tagu & 0xff) << 16) | data); } else if (tag == SampleFlags) { av_log(avctx, AV_LOG_DEBUG, "Progressive?%"PRIu16"\n", data); s->progressive = data & 0x0001; } else if (tag == ImageWidth) { av_log(avctx, AV_LOG_DEBUG, "Width %"PRIu16"\n", data); s->coded_width = data; } else if (tag == ImageHeight) { av_log(avctx, AV_LOG_DEBUG, "Height %"PRIu16"\n", data); s->coded_height = data; } else if (tag == 101) { av_log(avctx, AV_LOG_DEBUG, "Bits per component: %"PRIu16"\n", data); if (data < 1 || data > 31) { av_log(avctx, AV_LOG_ERROR, "Bits per component %d is invalid\n", data); ret = AVERROR(EINVAL); break; } s->bpc = data; } else if (tag == ChannelCount) { av_log(avctx, AV_LOG_DEBUG, "Channel Count: %"PRIu16"\n", data); s->channel_cnt = data; if (data > 4) { av_log(avctx, AV_LOG_ERROR, "Channel Count of %"PRIu16" is unsupported\n", data); ret = AVERROR_PATCHWELCOME; break; } } else if (tag == SubbandCount) { av_log(avctx, AV_LOG_DEBUG, "Subband Count: %"PRIu16"\n", data); if (data != SUBBAND_COUNT) { av_log(avctx, AV_LOG_ERROR, "Subband Count of %"PRIu16" is unsupported\n", data); ret = AVERROR_PATCHWELCOME; break; } } else if (tag == ChannelNumber) { s->channel_num = data; av_log(avctx, AV_LOG_DEBUG, "Channel number %"PRIu16"\n", data); if (s->channel_num >= planes) { av_log(avctx, AV_LOG_ERROR, "Invalid channel number\n"); ret = AVERROR(EINVAL); break; } init_plane_defaults(s); } else if (tag == SubbandNumber) { if (s->subband_num != 0 && data == 1) // hack s->level++; av_log(avctx, AV_LOG_DEBUG, "Subband number %"PRIu16"\n", data); s->subband_num = data; if (s->level >= DWT_LEVELS) { av_log(avctx, AV_LOG_ERROR, "Invalid level\n"); ret = AVERROR(EINVAL); break; } if (s->subband_num > 3) { av_log(avctx, AV_LOG_ERROR, "Invalid subband number\n"); ret = AVERROR(EINVAL); break; } } else if (tag == 51) { av_log(avctx, AV_LOG_DEBUG, "Subband number actual %"PRIu16"\n", data); s->subband_num_actual = data; if (s->subband_num_actual >= 10) { av_log(avctx, AV_LOG_ERROR, "Invalid subband number actual\n"); ret = AVERROR(EINVAL); break; } } else if (tag == LowpassPrecision) av_log(avctx, AV_LOG_DEBUG, "Lowpass precision bits: %"PRIu16"\n", data); else if (tag == Quantization) { s->quantisation = data; av_log(avctx, AV_LOG_DEBUG, "Quantisation: %"PRIu16"\n", data); } else if (tag == PrescaleShift) { s->prescale_shift[0] = (data >> 0) & 0x7; s->prescale_shift[1] = (data >> 3) & 0x7; s->prescale_shift[2] = (data >> 6) & 0x7; av_log(avctx, AV_LOG_DEBUG, "Prescale shift (VC-5): %x\n", data); } else if (tag == 27) { av_log(avctx, AV_LOG_DEBUG, "Lowpass width %"PRIu16"\n", data); if (data < 3 || data > s->plane[s->channel_num].band[0][0].a_width) { av_log(avctx, AV_LOG_ERROR, "Invalid lowpass width\n"); ret = AVERROR(EINVAL); break; } s->plane[s->channel_num].band[0][0].width = data; s->plane[s->channel_num].band[0][0].stride = data; } else if (tag == 28) { av_log(avctx, AV_LOG_DEBUG, "Lowpass height %"PRIu16"\n", data); if (data < 3 || data > s->plane[s->channel_num].band[0][0].a_height) { av_log(avctx, AV_LOG_ERROR, "Invalid lowpass height\n"); ret = AVERROR(EINVAL); break; } s->plane[s->channel_num].band[0][0].height = data; } else if (tag == 1) av_log(avctx, AV_LOG_DEBUG, "Sample type? %"PRIu16"\n", data); else if (tag == 10) { if (data != 0) { avpriv_report_missing_feature(avctx, "Transform type of %"PRIu16, data); ret = AVERROR_PATCHWELCOME; break; } else if (data == 1) { av_log(avctx, AV_LOG_ERROR, "unsupported transform type\n"); ret = AVERROR_PATCHWELCOME; break; } av_log(avctx, AV_LOG_DEBUG, "Transform-type? %"PRIu16"\n", data); } else if (abstag >= 0x4000 && abstag <= 0x40ff) { if (abstag == 0x4001) s->peak.level = 0; av_log(avctx, AV_LOG_DEBUG, "Small chunk length %d %s\n", data * 4, tag < 0 ? "optional" : "required"); bytestream2_skipu(&gb, data * 4); } else if (tag == 23) { av_log(avctx, AV_LOG_DEBUG, "Skip frame\n"); avpriv_report_missing_feature(avctx, "Skip frame"); ret = AVERROR_PATCHWELCOME; break; } else if (tag == 2) { av_log(avctx, AV_LOG_DEBUG, "tag=2 header - skipping %i tag/value pairs\n", data); if (data > bytestream2_get_bytes_left(&gb) / 4) { av_log(avctx, AV_LOG_ERROR, "too many tag/value pairs (%d)\n", data); ret = AVERROR_INVALIDDATA; break; } for (i = 0; i < data; i++) { uint16_t tag2 = bytestream2_get_be16(&gb); uint16_t val2 = bytestream2_get_be16(&gb); av_log(avctx, AV_LOG_DEBUG, "Tag/Value = %x %x\n", tag2, val2); } } else if (tag == 41) { av_log(avctx, AV_LOG_DEBUG, "Highpass width %i channel %i level %i subband %i\n", data, s->channel_num, s->level, s->subband_num); if (data < 3) { av_log(avctx, AV_LOG_ERROR, "Invalid highpass width\n"); ret = AVERROR(EINVAL); break; } s->plane[s->channel_num].band[s->level][s->subband_num].width = data; s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8); } else if (tag == 42) { av_log(avctx, AV_LOG_DEBUG, "Highpass height %i\n", data); if (data < 3) { av_log(avctx, AV_LOG_ERROR, "Invalid highpass height\n"); ret = AVERROR(EINVAL); break; } s->plane[s->channel_num].band[s->level][s->subband_num].height = data; } else if (tag == 49) { av_log(avctx, AV_LOG_DEBUG, "Highpass width2 %i\n", data); if (data < 3) { av_log(avctx, AV_LOG_ERROR, "Invalid highpass width2\n"); ret = AVERROR(EINVAL); break; } s->plane[s->channel_num].band[s->level][s->subband_num].width = data; s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8); } else if (tag == 50) { av_log(avctx, AV_LOG_DEBUG, "Highpass height2 %i\n", data); if (data < 3) { av_log(avctx, AV_LOG_ERROR, "Invalid highpass height2\n"); ret = AVERROR(EINVAL); break; } s->plane[s->channel_num].band[s->level][s->subband_num].height = data; } else if (tag == 71) { s->codebook = data; av_log(avctx, AV_LOG_DEBUG, "Codebook %i\n", s->codebook); } else if (tag == 72) { s->codebook = data & 0xf; s->difference_coding = (data >> 4) & 1; av_log(avctx, AV_LOG_DEBUG, "Other codebook? %i\n", s->codebook); } else if (tag == 70) { av_log(avctx, AV_LOG_DEBUG, "Subsampling or bit-depth flag? %i\n", data); if (!(data == 10 || data == 12)) { av_log(avctx, AV_LOG_ERROR, "Invalid bits per channel\n"); ret = AVERROR(EINVAL); break; } s->bpc = data; } else if (tag == 84) { av_log(avctx, AV_LOG_DEBUG, "Sample format? %i\n", data); if (data == 1) s->coded_format = AV_PIX_FMT_YUV422P10; else if (data == 3) s->coded_format = AV_PIX_FMT_GBRP12; else if (data == 4) s->coded_format = AV_PIX_FMT_GBRAP12; else { avpriv_report_missing_feature(avctx, "Sample format of %"PRIu16, data); ret = AVERROR_PATCHWELCOME; break; } planes = av_pix_fmt_count_planes(s->coded_format); } else if (tag == -85) { av_log(avctx, AV_LOG_DEBUG, "Cropped height %"PRIu16"\n", data); s->cropped_height = data; } else if (tag == -75) { s->peak.offset &= ~0xffff; s->peak.offset |= (data & 0xffff); s->peak.base = gb; s->peak.level = 0; } else if (tag == -76) { s->peak.offset &= 0xffff; s->peak.offset |= (data & 0xffffU)<<16; s->peak.base = gb; s->peak.level = 0; } else if (tag == -74 && s->peak.offset) { s->peak.level = data; if (s->peak.offset < 4 - bytestream2_tell(&s->peak.base) || s->peak.offset > 4 + bytestream2_get_bytes_left(&s->peak.base) ) { ret = AVERROR_INVALIDDATA; goto end; } bytestream2_seek(&s->peak.base, s->peak.offset - 4, SEEK_CUR); } else av_log(avctx, AV_LOG_DEBUG, "Unknown tag %i data %x\n", tag, data); /* Some kind of end of header tag */ if (tag == 4 && data == 0x1a4a && s->coded_width && s->coded_height && s->coded_format != AV_PIX_FMT_NONE) { if (s->a_width != s->coded_width || s->a_height != s->coded_height || s->a_format != s->coded_format) { free_buffers(s); if ((ret = alloc_buffers(avctx)) < 0) { free_buffers(s); return ret; } } ret = ff_set_dimensions(avctx, s->coded_width, s->coded_height); if (ret < 0) return ret; if (s->cropped_height) avctx->height = s->cropped_height; frame.f->width = frame.f->height = 0; if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0) return ret; s->coded_width = 0; s->coded_height = 0; s->coded_format = AV_PIX_FMT_NONE; got_buffer = 1; } coeff_data = s->plane[s->channel_num].subband[s->subband_num_actual]; /* Lowpass coefficients */ if (tag == 4 && data == 0xf0f && s->a_width && s->a_height) { int lowpass_height = s->plane[s->channel_num].band[0][0].height; int lowpass_width = s->plane[s->channel_num].band[0][0].width; int lowpass_a_height = s->plane[s->channel_num].band[0][0].a_height; int lowpass_a_width = s->plane[s->channel_num].band[0][0].a_width; if (!got_buffer) { av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n"); ret = AVERROR(EINVAL); goto end; } if (lowpass_height > lowpass_a_height || lowpass_width > lowpass_a_width || lowpass_a_width * lowpass_a_height * sizeof(int16_t) > bytestream2_get_bytes_left(&gb)) { av_log(avctx, AV_LOG_ERROR, "Too many lowpass coefficients\n"); ret = AVERROR(EINVAL); goto end; } av_log(avctx, AV_LOG_DEBUG, "Start of lowpass coeffs component %d height:%d, width:%d\n", s->channel_num, lowpass_height, lowpass_width); for (i = 0; i < lowpass_height; i++) { for (j = 0; j < lowpass_width; j++) coeff_data[j] = bytestream2_get_be16u(&gb); coeff_data += lowpass_width; } /* Align to mod-4 position to continue reading tags */ bytestream2_seek(&gb, bytestream2_tell(&gb) & 3, SEEK_CUR); /* Copy last line of coefficients if odd height */ if (lowpass_height & 1) { memcpy(&coeff_data[lowpass_height * lowpass_width], &coeff_data[(lowpass_height - 1) * lowpass_width], lowpass_width * sizeof(*coeff_data)); } av_log(avctx, AV_LOG_DEBUG, "Lowpass coefficients %d\n", lowpass_width * lowpass_height); } if (tag == 55 && s->subband_num_actual != 255 && s->a_width && s->a_height) { int highpass_height = s->plane[s->channel_num].band[s->level][s->subband_num].height; int highpass_width = s->plane[s->channel_num].band[s->level][s->subband_num].width; int highpass_a_width = s->plane[s->channel_num].band[s->level][s->subband_num].a_width; int highpass_a_height = s->plane[s->channel_num].band[s->level][s->subband_num].a_height; int highpass_stride = s->plane[s->channel_num].band[s->level][s->subband_num].stride; int expected; int a_expected = highpass_a_height * highpass_a_width; int level, run, coeff; int count = 0, bytes; if (!got_buffer) { av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n"); ret = AVERROR(EINVAL); goto end; } if (highpass_height > highpass_a_height || highpass_width > highpass_a_width || a_expected < highpass_height * (uint64_t)highpass_stride) { av_log(avctx, AV_LOG_ERROR, "Too many highpass coefficients\n"); ret = AVERROR(EINVAL); goto end; } expected = highpass_height * highpass_stride; av_log(avctx, AV_LOG_DEBUG, "Start subband coeffs plane %i level %i codebook %i expected %i\n", s->channel_num, s->level, s->codebook, expected); init_get_bits(&s->gb, gb.buffer, bytestream2_get_bytes_left(&gb) * 8); { OPEN_READER(re, &s->gb); if (!s->codebook) { while (1) { UPDATE_CACHE(re, &s->gb); GET_RL_VLC(level, run, re, &s->gb, s->table_9_rl_vlc, VLC_BITS, 3, 1); /* escape */ if (level == 64) break; count += run; if (count > expected) break; coeff = dequant_and_decompand(level, s->quantisation, 0); for (i = 0; i < run; i++) *coeff_data++ = coeff; } } else { while (1) { UPDATE_CACHE(re, &s->gb); GET_RL_VLC(level, run, re, &s->gb, s->table_18_rl_vlc, VLC_BITS, 3, 1); /* escape */ if (level == 255 && run == 2) break; count += run; if (count > expected) break; coeff = dequant_and_decompand(level, s->quantisation, s->codebook); for (i = 0; i < run; i++) *coeff_data++ = coeff; } } CLOSE_READER(re, &s->gb); } if (count > expected) { av_log(avctx, AV_LOG_ERROR, "Escape codeword not found, probably corrupt data\n"); ret = AVERROR(EINVAL); goto end; } if (s->peak.level) peak_table(coeff_data - count, &s->peak, count); if (s->difference_coding) difference_coding(s->plane[s->channel_num].subband[s->subband_num_actual], highpass_width, highpass_height); bytes = FFALIGN(AV_CEIL_RSHIFT(get_bits_count(&s->gb), 3), 4); if (bytes > bytestream2_get_bytes_left(&gb)) { av_log(avctx, AV_LOG_ERROR, "Bitstream overread error\n"); ret = AVERROR(EINVAL); goto end; } else bytestream2_seek(&gb, bytes, SEEK_CUR); av_log(avctx, AV_LOG_DEBUG, "End subband coeffs %i extra %i\n", count, count - expected); s->codebook = 0; /* Copy last line of coefficients if odd height */ if (highpass_height & 1) { memcpy(&coeff_data[highpass_height * highpass_stride], &coeff_data[(highpass_height - 1) * highpass_stride], highpass_stride * sizeof(*coeff_data)); } } } if (!s->a_width || !s->a_height || s->a_format == AV_PIX_FMT_NONE || s->coded_width || s->coded_height || s->coded_format != AV_PIX_FMT_NONE) { av_log(avctx, AV_LOG_ERROR, "Invalid dimensions\n"); ret = AVERROR(EINVAL); goto end; } if (!got_buffer) { av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n"); ret = AVERROR(EINVAL); goto end; } planes = av_pix_fmt_count_planes(avctx->pix_fmt); for (plane = 0; plane < planes && !ret; plane++) { /* level 1 */ int lowpass_height = s->plane[plane].band[0][0].height; int lowpass_width = s->plane[plane].band[0][0].width; int highpass_stride = s->plane[plane].band[0][1].stride; int act_plane = plane == 1 ? 2 : plane == 2 ? 1 : plane; int16_t *low, *high, *output, *dst; if (lowpass_height > s->plane[plane].band[0][0].a_height || lowpass_width > s->plane[plane].band[0][0].a_width || !highpass_stride || s->plane[plane].band[0][1].width > s->plane[plane].band[0][1].a_width) { av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n"); ret = AVERROR(EINVAL); goto end; } av_log(avctx, AV_LOG_DEBUG, "Decoding level 1 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride); low = s->plane[plane].subband[0]; high = s->plane[plane].subband[2]; output = s->plane[plane].l_h[0]; for (i = 0; i < lowpass_width; i++) { vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height); low++; high++; output++; } low = s->plane[plane].subband[1]; high = s->plane[plane].subband[3]; output = s->plane[plane].l_h[1]; for (i = 0; i < lowpass_width; i++) { // note the stride of "low" is highpass_stride vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height); low++; high++; output++; } low = s->plane[plane].l_h[0]; high = s->plane[plane].l_h[1]; output = s->plane[plane].subband[0]; for (i = 0; i < lowpass_height * 2; i++) { horiz_filter(output, low, high, lowpass_width); low += lowpass_width; high += lowpass_width; output += lowpass_width * 2; } if (s->bpc == 12) { output = s->plane[plane].subband[0]; for (i = 0; i < lowpass_height * 2; i++) { for (j = 0; j < lowpass_width * 2; j++) output[j] *= 4; output += lowpass_width * 2; } } /* level 2 */ lowpass_height = s->plane[plane].band[1][1].height; lowpass_width = s->plane[plane].band[1][1].width; highpass_stride = s->plane[plane].band[1][1].stride; if (lowpass_height > s->plane[plane].band[1][1].a_height || lowpass_width > s->plane[plane].band[1][1].a_width || !highpass_stride || s->plane[plane].band[1][1].width > s->plane[plane].band[1][1].a_width) { av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n"); ret = AVERROR(EINVAL); goto end; } av_log(avctx, AV_LOG_DEBUG, "Level 2 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride); low = s->plane[plane].subband[0]; high = s->plane[plane].subband[5]; output = s->plane[plane].l_h[3]; for (i = 0; i < lowpass_width; i++) { vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height); low++; high++; output++; } low = s->plane[plane].subband[4]; high = s->plane[plane].subband[6]; output = s->plane[plane].l_h[4]; for (i = 0; i < lowpass_width; i++) { vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height); low++; high++; output++; } low = s->plane[plane].l_h[3]; high = s->plane[plane].l_h[4]; output = s->plane[plane].subband[0]; for (i = 0; i < lowpass_height * 2; i++) { horiz_filter(output, low, high, lowpass_width); low += lowpass_width; high += lowpass_width; output += lowpass_width * 2; } output = s->plane[plane].subband[0]; for (i = 0; i < lowpass_height * 2; i++) { for (j = 0; j < lowpass_width * 2; j++) output[j] *= 4; output += lowpass_width * 2; } /* level 3 */ lowpass_height = s->plane[plane].band[2][1].height; lowpass_width = s->plane[plane].band[2][1].width; highpass_stride = s->plane[plane].band[2][1].stride; if (lowpass_height > s->plane[plane].band[2][1].a_height || lowpass_width > s->plane[plane].band[2][1].a_width || !highpass_stride || s->plane[plane].band[2][1].width > s->plane[plane].band[2][1].a_width) { av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n"); ret = AVERROR(EINVAL); goto end; } av_log(avctx, AV_LOG_DEBUG, "Level 3 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride); if (s->progressive) { low = s->plane[plane].subband[0]; high = s->plane[plane].subband[8]; output = s->plane[plane].l_h[6]; for (i = 0; i < lowpass_width; i++) { vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height); low++; high++; output++; } low = s->plane[plane].subband[7]; high = s->plane[plane].subband[9]; output = s->plane[plane].l_h[7]; for (i = 0; i < lowpass_width; i++) { vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height); low++; high++; output++; } dst = (int16_t *)pic->data[act_plane]; low = s->plane[plane].l_h[6]; high = s->plane[plane].l_h[7]; for (i = 0; i < lowpass_height * 2; i++) { horiz_filter_clip(dst, low, high, lowpass_width, s->bpc); low += lowpass_width; high += lowpass_width; dst += pic->linesize[act_plane] / 2; } } else { av_log(avctx, AV_LOG_DEBUG, "interlaced frame ? %d", pic->interlaced_frame); pic->interlaced_frame = 1; low = s->plane[plane].subband[0]; high = s->plane[plane].subband[7]; output = s->plane[plane].l_h[6]; for (i = 0; i < lowpass_height; i++) { horiz_filter(output, low, high, lowpass_width); low += lowpass_width; high += lowpass_width; output += lowpass_width * 2; } low = s->plane[plane].subband[8]; high = s->plane[plane].subband[9]; output = s->plane[plane].l_h[7]; for (i = 0; i < lowpass_height; i++) { horiz_filter(output, low, high, lowpass_width); low += lowpass_width; high += lowpass_width; output += lowpass_width * 2; } dst = (int16_t *)pic->data[act_plane]; low = s->plane[plane].l_h[6]; high = s->plane[plane].l_h[7]; for (i = 0; i < lowpass_height; i++) { interlaced_vertical_filter(dst, low, high, lowpass_width * 2, pic->linesize[act_plane]/2, act_plane); low += lowpass_width * 2; high += lowpass_width * 2; dst += pic->linesize[act_plane]; } } } end: if (ret < 0) return ret; *got_frame = 1; return avpkt->size; } static av_cold int cfhd_close(AVCodecContext *avctx) { CFHDContext *s = avctx->priv_data; free_buffers(s); if (!avctx->internal->is_copy) { ff_free_vlc(&s->vlc_9); ff_free_vlc(&s->vlc_18); } return 0; } AVCodec ff_cfhd_decoder = { .name = "cfhd", .long_name = NULL_IF_CONFIG_SMALL("Cineform HD"), .type = AVMEDIA_TYPE_VIDEO, .id = AV_CODEC_ID_CFHD, .priv_data_size = sizeof(CFHDContext), .init = cfhd_init, .close = cfhd_close, .decode = cfhd_decode, .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS, .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP, };