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FFmpeg/libavcodec/cfhd.c

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  1. /*

  2.  * Copyright (c) 2015-2016 Kieran Kunhya <kieran@kunhya.com>

  3.  *

  4.  * This file is part of FFmpeg.

  5.  *

  6.  * FFmpeg is free software; you can redistribute it and/or

  7.  * modify it under the terms of the GNU Lesser General Public

  8.  * License as published by the Free Software Foundation; either

  9.  * version 2.1 of the License, or (at your option) any later version.

  10.  *

  11.  * FFmpeg is distributed in the hope that it will be useful,

  12.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  13.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  14.  * Lesser General Public License for more details.

  15.  *

  16.  * You should have received a copy of the GNU Lesser General Public

  17.  * License along with FFmpeg; if not, write to the Free Software

  18.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  19.  */

  20. 

  21. /**

  22.  * @file

  23.  * Cineform HD video decoder

  24.  */

  25. 

  26. #include "libavutil/attributes.h"

  27. #include "libavutil/buffer.h"

  28. #include "libavutil/common.h"

  29. #include "libavutil/imgutils.h"

  30. #include "libavutil/intreadwrite.h"

  31. #include "libavutil/opt.h"

  32. 

  33. #include "avcodec.h"

  34. #include "bytestream.h"

  35. #include "get_bits.h"

  36. #include "internal.h"

  37. #include "thread.h"

  38. #include "cfhd.h"

  39. 

  40. #define ALPHA_COMPAND_DC_OFFSET 256

  41. #define ALPHA_COMPAND_GAIN 9400

  42. 

  43. enum CFHDParam {

  44.     ChannelCount     =  12,

  45.     SubbandCount     =  14,

  46.     ImageWidth       =  20,

  47.     ImageHeight      =  21,

  48.     LowpassPrecision =  35,

  49.     SubbandNumber    =  48,

  50.     Quantization     =  53,

  51.     ChannelNumber    =  62,

  52.     SampleFlags      =  68,

  53.     BitsPerComponent = 101,

  54.     ChannelWidth     = 104,

  55.     ChannelHeight    = 105,

  56.     PrescaleShift    = 109,

  57. };

  58. 

  59. 

  60. 

  61. static av_cold int cfhd_init(AVCodecContext *avctx)

  62. {

  63.     CFHDContext *s = avctx->priv_data;

  64. 

  65.     avctx->bits_per_raw_sample = 10;

  66.     s->avctx                   = avctx;

  67. 

  68.     return ff_cfhd_init_vlcs(s);

  69. }

  70. 

  71. static void init_plane_defaults(CFHDContext *s)

  72. {

  73.     s->subband_num        = 0;

  74.     s->level              = 0;

  75.     s->subband_num_actual = 0;

  76. }

  77. 

  78. static void init_peak_table_defaults(CFHDContext *s)

  79. {

  80.     s->peak.level  = 0;

  81.     s->peak.offset = 0;

  82.     memset(&s->peak.base, 0, sizeof(s->peak.base));

  83. }

  84. 

  85. static void init_frame_defaults(CFHDContext *s)

  86. {

  87.     s->coded_width       = 0;

  88.     s->coded_height      = 0;

  89.     s->cropped_height    = 0;

  90.     s->bpc               = 10;

  91.     s->channel_cnt       = 4;

  92.     s->subband_cnt       = SUBBAND_COUNT;

  93.     s->channel_num       = 0;

  94.     s->lowpass_precision = 16;

  95.     s->quantisation      = 1;

  96.     s->wavelet_depth     = 3;

  97.     s->pshift            = 1;

  98.     s->codebook          = 0;

  99.     s->difference_coding = 0;

  100.     s->progressive       = 0;

  101.     init_plane_defaults(s);

  102.     init_peak_table_defaults(s);

  103. }

  104. 

  105. /* TODO: merge with VLC tables or use LUT */

  106. static inline int dequant_and_decompand(int level, int quantisation, int codebook)

  107. {

  108.     if (codebook == 0 || codebook == 1) {

  109.         int64_t abslevel = abs(level);

  110.         if (level < 264)

  111.             return (abslevel + ((768 * abslevel * abslevel * abslevel) / (255 * 255 * 255))) *

  112.                FFSIGN(level) * quantisation;

  113.         else

  114.             return level * quantisation;

  115.     } else

  116.         return level * quantisation;

  117. }

  118. 

  119. static inline void difference_coding(int16_t *band, int width, int height)

  120. {

  121. 

  122.     int i,j;

  123.     for (i = 0; i < height; i++) {

  124.         for (j = 1; j < width; j++) {

  125.           band[j] += band[j-1];

  126.         }

  127.         band += width;

  128.     }

  129. }

  130. 

  131. static inline void peak_table(int16_t *band, Peak *peak, int length)

  132. {

  133.     int i;

  134.     for (i = 0; i < length; i++)

  135.         if (abs(band[i]) > peak->level)

  136.             band[i] = bytestream2_get_le16(&peak->base);

  137. }

  138. 

  139. static inline void process_alpha(int16_t *alpha, int width)

  140. {

  141.     int i, channel;

  142.     for (i = 0; i < width; i++) {

  143.         channel   = alpha[i];

  144.         channel  -= ALPHA_COMPAND_DC_OFFSET;

  145.         channel <<= 3;

  146.         channel  *= ALPHA_COMPAND_GAIN;

  147.         channel >>= 16;

  148.         channel   = av_clip_uintp2(channel, 12);

  149.         alpha[i]  = channel;

  150.     }

  151. }

  152. 

  153. static inline void process_bayer(AVFrame *frame)

  154. {

  155.     const int linesize = frame->linesize[0];

  156.     uint16_t *r = (uint16_t *)frame->data[0];

  157.     uint16_t *g1 = (uint16_t *)(frame->data[0] + 2);

  158.     uint16_t *g2 = (uint16_t *)(frame->data[0] + frame->linesize[0]);

  159.     uint16_t *b = (uint16_t *)(frame->data[0] + frame->linesize[0] + 2);

  160.     const int mid = 2048;

  161. 

  162.     for (int y = 0; y < frame->height >> 1; y++) {

  163.         for (int x = 0; x < frame->width; x += 2) {

  164.             int R, G1, G2, B;

  165.             int g, rg, bg, gd;

  166. 

  167.             g  = r[x];

  168.             rg = g1[x];

  169.             bg = g2[x];

  170.             gd = b[x];

  171.             gd -= mid;

  172. 

  173.             R  = (rg - mid) * 2 + g;

  174.             G1 = g + gd;

  175.             G2 = g - gd;

  176.             B  = (bg - mid) * 2 + g;

  177. 

  178.             R  = av_clip_uintp2(R  * 16, 16);

  179.             G1 = av_clip_uintp2(G1 * 16, 16);

  180.             G2 = av_clip_uintp2(G2 * 16, 16);

  181.             B  = av_clip_uintp2(B  * 16, 16);

  182. 

  183.             r[x]  = R;

  184.             g1[x] = G1;

  185.             g2[x] = G2;

  186.             b[x]  = B;

  187.         }

  188. 

  189.         r  += linesize;

  190.         g1 += linesize;

  191.         g2 += linesize;

  192.         b  += linesize;

  193.     }

  194. }

  195. 

  196. static inline void filter(int16_t *output, ptrdiff_t out_stride,

  197.                           int16_t *low, ptrdiff_t low_stride,

  198.                           int16_t *high, ptrdiff_t high_stride,

  199.                           int len, int clip)

  200. {

  201.     int16_t tmp;

  202.     int i;

  203. 

  204.     for (i = 0; i < len; i++) {

  205.         if (i == 0) {

  206.             tmp = (11*low[0*low_stride] - 4*low[1*low_stride] + low[2*low_stride] + 4) >> 3;

  207.             output[(2*i+0)*out_stride] = (tmp + high[0*high_stride]) >> 1;

  208.             if (clip)

  209.                 output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);

  210. 

  211.             tmp = ( 5*low[0*low_stride] + 4*low[1*low_stride] - low[2*low_stride] + 4) >> 3;

  212.             output[(2*i+1)*out_stride] = (tmp - high[0*high_stride]) >> 1;

  213.             if (clip)

  214.                 output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);

  215.         } else if (i == len-1) {

  216.             tmp = ( 5*low[i*low_stride] + 4*low[(i-1)*low_stride] - low[(i-2)*low_stride] + 4) >> 3;

  217.             output[(2*i+0)*out_stride] = (tmp + high[i*high_stride]) >> 1;

  218.             if (clip)

  219.                 output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);

  220. 

  221.             tmp = (11*low[i*low_stride] - 4*low[(i-1)*low_stride] + low[(i-2)*low_stride] + 4) >> 3;

  222.             output[(2*i+1)*out_stride] = (tmp - high[i*high_stride]) >> 1;

  223.             if (clip)

  224.                 output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);

  225.         } else {

  226.             tmp = (low[(i-1)*low_stride] - low[(i+1)*low_stride] + 4) >> 3;

  227.             output[(2*i+0)*out_stride] = (tmp + low[i*low_stride] + high[i*high_stride]) >> 1;

  228.             if (clip)

  229.                 output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);

  230. 

  231.             tmp = (low[(i+1)*low_stride] - low[(i-1)*low_stride] + 4) >> 3;

  232.             output[(2*i+1)*out_stride] = (tmp + low[i*low_stride] - high[i*high_stride]) >> 1;

  233.             if (clip)

  234.                 output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);

  235.         }

  236.     }

  237. }

  238. 

  239. static inline void interlaced_vertical_filter(int16_t *output, int16_t *low, int16_t *high,

  240.                          int width, int linesize, int plane)

  241. {

  242.     int i;

  243.     int16_t even, odd;

  244.     for (i = 0; i < width; i++) {

  245.         even = (low[i] - high[i])/2;

  246.         odd  = (low[i] + high[i])/2;

  247.         output[i]            = av_clip_uintp2(even, 10);

  248.         output[i + linesize] = av_clip_uintp2(odd, 10);

  249.     }

  250. }

  251. static void horiz_filter(int16_t *output, int16_t *low, int16_t *high,

  252.                          int width)

  253. {

  254.     filter(output, 1, low, 1, high, 1, width, 0);

  255. }

  256. 

  257. static void horiz_filter_clip(int16_t *output, int16_t *low, int16_t *high,

  258.                               int width, int clip)

  259. {

  260.     filter(output, 1, low, 1, high, 1, width, clip);

  261. }

  262. 

  263. static void horiz_filter_clip_bayer(int16_t *output, int16_t *low, int16_t *high,

  264.                                     int width, int clip)

  265. {

  266.     filter(output, 2, low, 1, high, 1, width, clip);

  267. }

  268. 

  269. static void vert_filter(int16_t *output, ptrdiff_t out_stride,

  270.                         int16_t *low, ptrdiff_t low_stride,

  271.                         int16_t *high, ptrdiff_t high_stride, int len)

  272. {

  273.     filter(output, out_stride, low, low_stride, high, high_stride, len, 0);

  274. }

  275. 

  276. static void free_buffers(CFHDContext *s)

  277. {

  278.     int i, j;

  279. 

  280.     for (i = 0; i < FF_ARRAY_ELEMS(s->plane); i++) {

  281.         av_freep(&s->plane[i].idwt_buf);

  282.         av_freep(&s->plane[i].idwt_tmp);

  283. 

  284.         for (j = 0; j < 9; j++)

  285.             s->plane[i].subband[j] = NULL;

  286. 

  287.         for (j = 0; j < 8; j++)

  288.             s->plane[i].l_h[j] = NULL;

  289.     }

  290.     s->a_height = 0;

  291.     s->a_width  = 0;

  292. }

  293. 

  294. static int alloc_buffers(AVCodecContext *avctx)

  295. {

  296.     CFHDContext *s = avctx->priv_data;

  297.     int i, j, ret, planes;

  298.     int chroma_x_shift, chroma_y_shift;

  299.     unsigned k;

  300. 

  301.     if (s->coded_format == AV_PIX_FMT_BAYER_RGGB16) {

  302.         s->coded_width *= 2;

  303.         s->coded_height *= 2;

  304.     }

  305. 

  306.     if ((ret = ff_set_dimensions(avctx, s->coded_width, s->coded_height)) < 0)

  307.         return ret;

  308.     avctx->pix_fmt = s->coded_format;

  309. 

  310.     if ((ret = av_pix_fmt_get_chroma_sub_sample(s->coded_format,

  311.                                                 &chroma_x_shift,

  312.                                                 &chroma_y_shift)) < 0)

  313.         return ret;

  314.     planes = av_pix_fmt_count_planes(s->coded_format);

  315.     if (s->coded_format == AV_PIX_FMT_BAYER_RGGB16) {

  316.         planes = 4;

  317.         chroma_x_shift = 1;

  318.         chroma_y_shift = 1;

  319.     }

  320. 

  321.     for (i = 0; i < planes; i++) {

  322.         int w8, h8, w4, h4, w2, h2;

  323.         int width  = i ? avctx->width  >> chroma_x_shift : avctx->width;

  324.         int height = i ? avctx->height >> chroma_y_shift : avctx->height;

  325.         ptrdiff_t stride = FFALIGN(width  / 8, 8) * 8;

  326.         if (chroma_y_shift)

  327.             height = FFALIGN(height / 8, 2) * 8;

  328.         s->plane[i].width  = width;

  329.         s->plane[i].height = height;

  330.         s->plane[i].stride = stride;

  331. 

  332.         w8 = FFALIGN(s->plane[i].width  / 8, 8);

  333.         h8 = height / 8;

  334.         w4 = w8 * 2;

  335.         h4 = h8 * 2;

  336.         w2 = w4 * 2;

  337.         h2 = h4 * 2;

  338. 

  339.         s->plane[i].idwt_buf =

  340.             av_mallocz_array(height * stride, sizeof(*s->plane[i].idwt_buf));

  341.         s->plane[i].idwt_tmp =

  342.             av_malloc_array(height * stride, sizeof(*s->plane[i].idwt_tmp));

  343.         if (!s->plane[i].idwt_buf || !s->plane[i].idwt_tmp)

  344.             return AVERROR(ENOMEM);

  345. 

  346.         s->plane[i].subband[0] = s->plane[i].idwt_buf;

  347.         s->plane[i].subband[1] = s->plane[i].idwt_buf + 2 * w8 * h8;

  348.         s->plane[i].subband[2] = s->plane[i].idwt_buf + 1 * w8 * h8;

  349.         s->plane[i].subband[3] = s->plane[i].idwt_buf + 3 * w8 * h8;

  350.         s->plane[i].subband[4] = s->plane[i].idwt_buf + 2 * w4 * h4;

  351.         s->plane[i].subband[5] = s->plane[i].idwt_buf + 1 * w4 * h4;

  352.         s->plane[i].subband[6] = s->plane[i].idwt_buf + 3 * w4 * h4;

  353.         s->plane[i].subband[7] = s->plane[i].idwt_buf + 2 * w2 * h2;

  354.         s->plane[i].subband[8] = s->plane[i].idwt_buf + 1 * w2 * h2;

  355.         s->plane[i].subband[9] = s->plane[i].idwt_buf + 3 * w2 * h2;

  356. 

  357.         for (j = 0; j < DWT_LEVELS; j++) {

  358.             for (k = 0; k < FF_ARRAY_ELEMS(s->plane[i].band[j]); k++) {

  359.                 s->plane[i].band[j][k].a_width  = w8 << j;

  360.                 s->plane[i].band[j][k].a_height = h8 << j;

  361.             }

  362.         }

  363. 

  364.         /* ll2 and ll1 commented out because they are done in-place */

  365.         s->plane[i].l_h[0] = s->plane[i].idwt_tmp;

  366.         s->plane[i].l_h[1] = s->plane[i].idwt_tmp + 2 * w8 * h8;

  367.         // s->plane[i].l_h[2] = ll2;

  368.         s->plane[i].l_h[3] = s->plane[i].idwt_tmp;

  369.         s->plane[i].l_h[4] = s->plane[i].idwt_tmp + 2 * w4 * h4;

  370.         // s->plane[i].l_h[5] = ll1;

  371.         s->plane[i].l_h[6] = s->plane[i].idwt_tmp;

  372.         s->plane[i].l_h[7] = s->plane[i].idwt_tmp + 2 * w2 * h2;

  373.     }

  374. 

  375.     s->a_height = s->coded_height;

  376.     s->a_width  = s->coded_width;

  377.     s->a_format = s->coded_format;

  378. 

  379.     return 0;

  380. }

  381. 

  382. static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame,

  383.                        AVPacket *avpkt)

  384. {

  385.     CFHDContext *s = avctx->priv_data;

  386.     GetByteContext gb;

  387.     ThreadFrame frame = { .f = data };

  388.     AVFrame *pic = data;

  389.     int ret = 0, i, j, planes, plane, got_buffer = 0;

  390.     int16_t *coeff_data;

  391. 

  392.     s->coded_format = AV_PIX_FMT_YUV422P10;

  393.     init_frame_defaults(s);

  394.     planes = av_pix_fmt_count_planes(s->coded_format);

  395. 

  396.     bytestream2_init(&gb, avpkt->data, avpkt->size);

  397. 

  398.     while (bytestream2_get_bytes_left(&gb) > 4) {

  399.         /* Bit weird but implement the tag parsing as the spec says */

  400.         uint16_t tagu   = bytestream2_get_be16(&gb);

  401.         int16_t tag     = (int16_t)tagu;

  402.         int8_t tag8     = (int8_t)(tagu >> 8);

  403.         uint16_t abstag = abs(tag);

  404.         int8_t abs_tag8 = abs(tag8);

  405.         uint16_t data   = bytestream2_get_be16(&gb);

  406.         if (abs_tag8 >= 0x60 && abs_tag8 <= 0x6f) {

  407.             av_log(avctx, AV_LOG_DEBUG, "large len %x\n", ((tagu & 0xff) << 16) | data);

  408.         } else if (tag == SampleFlags) {

  409.             av_log(avctx, AV_LOG_DEBUG, "Progressive?%"PRIu16"\n", data);

  410.             s->progressive = data & 0x0001;

  411.         } else if (tag == ImageWidth) {

  412.             av_log(avctx, AV_LOG_DEBUG, "Width %"PRIu16"\n", data);

  413.             s->coded_width = data;

  414.         } else if (tag == ImageHeight) {

  415.             av_log(avctx, AV_LOG_DEBUG, "Height %"PRIu16"\n", data);

  416.             s->coded_height = data;

  417.         } else if (tag == 101) {

  418.             av_log(avctx, AV_LOG_DEBUG, "Bits per component: %"PRIu16"\n", data);

  419.             if (data < 1 || data > 31) {

  420.                 av_log(avctx, AV_LOG_ERROR, "Bits per component %d is invalid\n", data);

  421.                 ret = AVERROR(EINVAL);

  422.                 break;

  423.             }

  424.             s->bpc = data;

  425.         } else if (tag == ChannelCount) {

  426.             av_log(avctx, AV_LOG_DEBUG, "Channel Count: %"PRIu16"\n", data);

  427.             s->channel_cnt = data;

  428.             if (data > 4) {

  429.                 av_log(avctx, AV_LOG_ERROR, "Channel Count of %"PRIu16" is unsupported\n", data);

  430.                 ret = AVERROR_PATCHWELCOME;

  431.                 break;

  432.             }

  433.         } else if (tag == SubbandCount) {

  434.             av_log(avctx, AV_LOG_DEBUG, "Subband Count: %"PRIu16"\n", data);

  435.             if (data != SUBBAND_COUNT) {

  436.                 av_log(avctx, AV_LOG_ERROR, "Subband Count of %"PRIu16" is unsupported\n", data);

  437.                 ret = AVERROR_PATCHWELCOME;

  438.                 break;

  439.             }

  440.         } else if (tag == ChannelNumber) {

  441.             s->channel_num = data;

  442.             av_log(avctx, AV_LOG_DEBUG, "Channel number %"PRIu16"\n", data);

  443.             if (s->channel_num >= planes) {

  444.                 av_log(avctx, AV_LOG_ERROR, "Invalid channel number\n");

  445.                 ret = AVERROR(EINVAL);

  446.                 break;

  447.             }

  448.             init_plane_defaults(s);

  449.         } else if (tag == SubbandNumber) {

  450.             if (s->subband_num != 0 && data == 1)  // hack

  451.                 s->level++;

  452.             av_log(avctx, AV_LOG_DEBUG, "Subband number %"PRIu16"\n", data);

  453.             s->subband_num = data;

  454.             if (s->level >= DWT_LEVELS) {

  455.                 av_log(avctx, AV_LOG_ERROR, "Invalid level\n");

  456.                 ret = AVERROR(EINVAL);

  457.                 break;

  458.             }

  459.             if (s->subband_num > 3) {

  460.                 av_log(avctx, AV_LOG_ERROR, "Invalid subband number\n");

  461.                 ret = AVERROR(EINVAL);

  462.                 break;

  463.             }

  464.         } else if (tag == 51) {

  465.             av_log(avctx, AV_LOG_DEBUG, "Subband number actual %"PRIu16"\n", data);

  466.             s->subband_num_actual = data;

  467.             if (s->subband_num_actual >= 10) {

  468.                 av_log(avctx, AV_LOG_ERROR, "Invalid subband number actual\n");

  469.                 ret = AVERROR(EINVAL);

  470.                 break;

  471.             }

  472.         } else if (tag == LowpassPrecision)

  473.             av_log(avctx, AV_LOG_DEBUG, "Lowpass precision bits: %"PRIu16"\n", data);

  474.         else if (tag == Quantization) {

  475.             s->quantisation = data;

  476.             av_log(avctx, AV_LOG_DEBUG, "Quantisation: %"PRIu16"\n", data);

  477.         } else if (tag == PrescaleShift) {

  478.             s->prescale_shift[0] = (data >> 0) & 0x7;

  479.             s->prescale_shift[1] = (data >> 3) & 0x7;

  480.             s->prescale_shift[2] = (data >> 6) & 0x7;

  481.             av_log(avctx, AV_LOG_DEBUG, "Prescale shift (VC-5): %x\n", data);

  482.         } else if (tag == 27) {

  483.             av_log(avctx, AV_LOG_DEBUG, "Lowpass width %"PRIu16"\n", data);

  484.             if (data < 3 || data > s->plane[s->channel_num].band[0][0].a_width) {

  485.                 av_log(avctx, AV_LOG_ERROR, "Invalid lowpass width\n");

  486.                 ret = AVERROR(EINVAL);

  487.                 break;

  488.             }

  489.             s->plane[s->channel_num].band[0][0].width  = data;

  490.             s->plane[s->channel_num].band[0][0].stride = data;

  491.         } else if (tag == 28) {

  492.             av_log(avctx, AV_LOG_DEBUG, "Lowpass height %"PRIu16"\n", data);

  493.             if (data < 3 || data > s->plane[s->channel_num].band[0][0].a_height) {

  494.                 av_log(avctx, AV_LOG_ERROR, "Invalid lowpass height\n");

  495.                 ret = AVERROR(EINVAL);

  496.                 break;

  497.             }

  498.             s->plane[s->channel_num].band[0][0].height = data;

  499.         } else if (tag == 1)

  500.             av_log(avctx, AV_LOG_DEBUG, "Sample type? %"PRIu16"\n", data);

  501.         else if (tag == 10) {

  502.             if (data != 0) {

  503.                 avpriv_report_missing_feature(avctx, "Transform type of %"PRIu16, data);

  504.                 ret = AVERROR_PATCHWELCOME;

  505.                 break;

  506.             }

  507.             av_log(avctx, AV_LOG_DEBUG, "Transform-type? %"PRIu16"\n", data);

  508.         } else if (abstag >= 0x4000 && abstag <= 0x40ff) {

  509.             if (abstag == 0x4001)

  510.                 s->peak.level = 0;

  511.             av_log(avctx, AV_LOG_DEBUG, "Small chunk length %d %s\n", data * 4, tag < 0 ? "optional" : "required");

  512.             bytestream2_skipu(&gb, data * 4);

  513.         } else if (tag == 23) {

  514.             av_log(avctx, AV_LOG_DEBUG, "Skip frame\n");

  515.             avpriv_report_missing_feature(avctx, "Skip frame");

  516.             ret = AVERROR_PATCHWELCOME;

  517.             break;

  518.         } else if (tag == 2) {

  519.             av_log(avctx, AV_LOG_DEBUG, "tag=2 header - skipping %i tag/value pairs\n", data);

  520.             if (data > bytestream2_get_bytes_left(&gb) / 4) {

  521.                 av_log(avctx, AV_LOG_ERROR, "too many tag/value pairs (%d)\n", data);

  522.                 ret = AVERROR_INVALIDDATA;

  523.                 break;

  524.             }

  525.             for (i = 0; i < data; i++) {

  526.                 uint16_t tag2 = bytestream2_get_be16(&gb);

  527.                 uint16_t val2 = bytestream2_get_be16(&gb);

  528.                 av_log(avctx, AV_LOG_DEBUG, "Tag/Value = %x %x\n", tag2, val2);

  529.             }

  530.         } else if (tag == 41) {

  531.             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);

  532.             if (data < 3) {

  533.                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass width\n");

  534.                 ret = AVERROR(EINVAL);

  535.                 break;

  536.             }

  537.             s->plane[s->channel_num].band[s->level][s->subband_num].width  = data;

  538.             s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);

  539.         } else if (tag == 42) {

  540.             av_log(avctx, AV_LOG_DEBUG, "Highpass height %i\n", data);

  541.             if (data < 3) {

  542.                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass height\n");

  543.                 ret = AVERROR(EINVAL);

  544.                 break;

  545.             }

  546.             s->plane[s->channel_num].band[s->level][s->subband_num].height = data;

  547.         } else if (tag == 49) {

  548.             av_log(avctx, AV_LOG_DEBUG, "Highpass width2 %i\n", data);

  549.             if (data < 3) {

  550.                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass width2\n");

  551.                 ret = AVERROR(EINVAL);

  552.                 break;

  553.             }

  554.             s->plane[s->channel_num].band[s->level][s->subband_num].width  = data;

  555.             s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);

  556.         } else if (tag == 50) {

  557.             av_log(avctx, AV_LOG_DEBUG, "Highpass height2 %i\n", data);

  558.             if (data < 3) {

  559.                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass height2\n");

  560.                 ret = AVERROR(EINVAL);

  561.                 break;

  562.             }

  563.             s->plane[s->channel_num].band[s->level][s->subband_num].height = data;

  564.         } else if (tag == 71) {

  565.             s->codebook = data;

  566.             av_log(avctx, AV_LOG_DEBUG, "Codebook %i\n", s->codebook);

  567.         } else if (tag == 72) {

  568.             s->codebook = data & 0xf;

  569.             s->difference_coding = (data >> 4) & 1;

  570.             av_log(avctx, AV_LOG_DEBUG, "Other codebook? %i\n", s->codebook);

  571.         } else if (tag == 70) {

  572.             av_log(avctx, AV_LOG_DEBUG, "Subsampling or bit-depth flag? %i\n", data);

  573.             if (!(data == 10 || data == 12)) {

  574.                 av_log(avctx, AV_LOG_ERROR, "Invalid bits per channel\n");

  575.                 ret = AVERROR(EINVAL);

  576.                 break;

  577.             }

  578.             s->bpc = data;

  579.         } else if (tag == 84) {

  580.             av_log(avctx, AV_LOG_DEBUG, "Sample format? %i\n", data);

  581.             if (data == 1) {

  582.                 s->coded_format = AV_PIX_FMT_YUV422P10;

  583.             } else if (data == 2) {

  584.                 s->coded_format = AV_PIX_FMT_BAYER_RGGB16;

  585.             } else if (data == 3) {

  586.                 s->coded_format = AV_PIX_FMT_GBRP12;

  587.             } else if (data == 4) {

  588.                 s->coded_format = AV_PIX_FMT_GBRAP12;

  589.             } else {

  590.                 avpriv_report_missing_feature(avctx, "Sample format of %"PRIu16, data);

  591.                 ret = AVERROR_PATCHWELCOME;

  592.                 break;

  593.             }

  594.             planes = data == 2 ? 4 : av_pix_fmt_count_planes(s->coded_format);

  595.         } else if (tag == -85) {

  596.             av_log(avctx, AV_LOG_DEBUG, "Cropped height %"PRIu16"\n", data);

  597.             s->cropped_height = data;

  598.         } else if (tag == -75) {

  599.             s->peak.offset &= ~0xffff;

  600.             s->peak.offset |= (data & 0xffff);

  601.             s->peak.base    = gb;

  602.             s->peak.level   = 0;

  603.         } else if (tag == -76) {

  604.             s->peak.offset &= 0xffff;

  605.             s->peak.offset |= (data & 0xffffU)<<16;

  606.             s->peak.base    = gb;

  607.             s->peak.level   = 0;

  608.         } else if (tag == -74 && s->peak.offset) {

  609.             s->peak.level = data;

  610.             bytestream2_seek(&s->peak.base, s->peak.offset - 4, SEEK_CUR);

  611.         } else

  612.             av_log(avctx, AV_LOG_DEBUG,  "Unknown tag %i data %x\n", tag, data);

  613. 

  614.         /* Some kind of end of header tag */

  615.         if (tag == 4 && data == 0x1a4a && s->coded_width && s->coded_height &&

  616.             s->coded_format != AV_PIX_FMT_NONE) {

  617.             if (s->a_width != s->coded_width || s->a_height != s->coded_height ||

  618.                 s->a_format != s->coded_format) {

  619.                 free_buffers(s);

  620.                 if ((ret = alloc_buffers(avctx)) < 0) {

  621.                     free_buffers(s);

  622.                     return ret;

  623.                 }

  624.             }

  625.             ret = ff_set_dimensions(avctx, s->coded_width, s->coded_height);

  626.             if (ret < 0)

  627.                 return ret;

  628.             if (s->cropped_height) {

  629.                 unsigned height = s->cropped_height << (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16);

  630.                 if (avctx->height < height)

  631.                     return AVERROR_INVALIDDATA;

  632.                 avctx->height = height;

  633.             }

  634.             frame.f->width =

  635.             frame.f->height = 0;

  636. 

  637.             if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)

  638.                 return ret;

  639. 

  640.             s->coded_width = 0;

  641.             s->coded_height = 0;

  642.             s->coded_format = AV_PIX_FMT_NONE;

  643.             got_buffer = 1;

  644.         }

  645.         coeff_data = s->plane[s->channel_num].subband[s->subband_num_actual];

  646. 

  647.         /* Lowpass coefficients */

  648.         if (tag == 4 && data == 0xf0f && s->a_width && s->a_height) {

  649.             int lowpass_height = s->plane[s->channel_num].band[0][0].height;

  650.             int lowpass_width  = s->plane[s->channel_num].band[0][0].width;

  651.             int lowpass_a_height = s->plane[s->channel_num].band[0][0].a_height;

  652.             int lowpass_a_width  = s->plane[s->channel_num].band[0][0].a_width;

  653. 

  654.             if (!got_buffer) {

  655.                 av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");

  656.                 ret = AVERROR(EINVAL);

  657.                 goto end;

  658.             }

  659. 

  660.             if (lowpass_height > lowpass_a_height || lowpass_width > lowpass_a_width ||

  661.                 lowpass_a_width * lowpass_a_height * sizeof(int16_t) > bytestream2_get_bytes_left(&gb)) {

  662.                 av_log(avctx, AV_LOG_ERROR, "Too many lowpass coefficients\n");

  663.                 ret = AVERROR(EINVAL);

  664.                 goto end;

  665.             }

  666. 

  667.             av_log(avctx, AV_LOG_DEBUG, "Start of lowpass coeffs component %d height:%d, width:%d\n", s->channel_num, lowpass_height, lowpass_width);

  668.             for (i = 0; i < lowpass_height; i++) {

  669.                 for (j = 0; j < lowpass_width; j++)

  670.                     coeff_data[j] = bytestream2_get_be16u(&gb);

  671. 

  672.                 coeff_data += lowpass_width;

  673.             }

  674. 

  675.             /* Align to mod-4 position to continue reading tags */

  676.             bytestream2_seek(&gb, bytestream2_tell(&gb) & 3, SEEK_CUR);

  677. 

  678.             /* Copy last line of coefficients if odd height */

  679.             if (lowpass_height & 1) {

  680.                 memcpy(&coeff_data[lowpass_height * lowpass_width],

  681.                        &coeff_data[(lowpass_height - 1) * lowpass_width],

  682.                        lowpass_width * sizeof(*coeff_data));

  683.             }

  684. 

  685.             av_log(avctx, AV_LOG_DEBUG, "Lowpass coefficients %d\n", lowpass_width * lowpass_height);

  686.         }

  687. 

  688.         if (tag == 55 && s->subband_num_actual != 255 && s->a_width && s->a_height) {

  689.             int highpass_height = s->plane[s->channel_num].band[s->level][s->subband_num].height;

  690.             int highpass_width  = s->plane[s->channel_num].band[s->level][s->subband_num].width;

  691.             int highpass_a_width = s->plane[s->channel_num].band[s->level][s->subband_num].a_width;

  692.             int highpass_a_height = s->plane[s->channel_num].band[s->level][s->subband_num].a_height;

  693.             int highpass_stride = s->plane[s->channel_num].band[s->level][s->subband_num].stride;

  694.             int expected;

  695.             int a_expected = highpass_a_height * highpass_a_width;

  696.             int level, run, coeff;

  697.             int count = 0, bytes;

  698. 

  699.             if (!got_buffer) {

  700.                 av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");

  701.                 ret = AVERROR(EINVAL);

  702.                 goto end;

  703.             }

  704. 

  705.             if (highpass_height > highpass_a_height || highpass_width > highpass_a_width || a_expected < highpass_height * (uint64_t)highpass_stride) {

  706.                 av_log(avctx, AV_LOG_ERROR, "Too many highpass coefficients\n");

  707.                 ret = AVERROR(EINVAL);

  708.                 goto end;

  709.             }

  710.             expected = highpass_height * highpass_stride;

  711. 

  712.             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);

  713. 

  714.             init_get_bits(&s->gb, gb.buffer, bytestream2_get_bytes_left(&gb) * 8);

  715.             {

  716.                 OPEN_READER(re, &s->gb);

  717.                 if (!s->codebook) {

  718.                     while (1) {

  719.                         UPDATE_CACHE(re, &s->gb);

  720.                         GET_RL_VLC(level, run, re, &s->gb, s->table_9_rl_vlc,

  721.                                    VLC_BITS, 3, 1);

  722. 

  723.                         /* escape */

  724.                         if (level == 64)

  725.                             break;

  726. 

  727.                         count += run;

  728. 

  729.                         if (count > expected)

  730.                             break;

  731. 

  732.                         coeff = dequant_and_decompand(level, s->quantisation, 0);

  733.                         for (i = 0; i < run; i++)

  734.                             *coeff_data++ = coeff;

  735.                     }

  736.                 } else {

  737.                     while (1) {

  738.                         UPDATE_CACHE(re, &s->gb);

  739.                         GET_RL_VLC(level, run, re, &s->gb, s->table_18_rl_vlc,

  740.                                    VLC_BITS, 3, 1);

  741. 

  742.                         /* escape */

  743.                         if (level == 255 && run == 2)

  744.                             break;

  745. 

  746.                         count += run;

  747. 

  748.                         if (count > expected)

  749.                             break;

  750. 

  751.                         coeff = dequant_and_decompand(level, s->quantisation, s->codebook);

  752.                         for (i = 0; i < run; i++)

  753.                             *coeff_data++ = coeff;

  754.                     }

  755.                 }

  756.                 CLOSE_READER(re, &s->gb);

  757.             }

  758. 

  759.             if (count > expected) {

  760.                 av_log(avctx, AV_LOG_ERROR, "Escape codeword not found, probably corrupt data\n");

  761.                 ret = AVERROR(EINVAL);

  762.                 goto end;

  763.             }

  764.             if (s->peak.level)

  765.                 peak_table(coeff_data - count, &s->peak, count);

  766.             if (s->difference_coding)

  767.                 difference_coding(s->plane[s->channel_num].subband[s->subband_num_actual], highpass_width, highpass_height);

  768. 

  769.             bytes = FFALIGN(AV_CEIL_RSHIFT(get_bits_count(&s->gb), 3), 4);

  770.             if (bytes > bytestream2_get_bytes_left(&gb)) {

  771.                 av_log(avctx, AV_LOG_ERROR, "Bitstream overread error\n");

  772.                 ret = AVERROR(EINVAL);

  773.                 goto end;

  774.             } else

  775.                 bytestream2_seek(&gb, bytes, SEEK_CUR);

  776. 

  777.             av_log(avctx, AV_LOG_DEBUG, "End subband coeffs %i extra %i\n", count, count - expected);

  778.             s->codebook = 0;

  779. 

  780.             /* Copy last line of coefficients if odd height */

  781.             if (highpass_height & 1) {

  782.                 memcpy(&coeff_data[highpass_height * highpass_stride],

  783.                        &coeff_data[(highpass_height - 1) * highpass_stride],

  784.                        highpass_stride * sizeof(*coeff_data));

  785.             }

  786.         }

  787.     }

  788. 

  789.     if (!s->a_width || !s->a_height || s->a_format == AV_PIX_FMT_NONE ||

  790.         s->coded_width || s->coded_height || s->coded_format != AV_PIX_FMT_NONE) {

  791.         av_log(avctx, AV_LOG_ERROR, "Invalid dimensions\n");

  792.         ret = AVERROR(EINVAL);

  793.         goto end;

  794.     }

  795. 

  796.     if (!got_buffer) {

  797.         av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");

  798.         ret = AVERROR(EINVAL);

  799.         goto end;

  800.     }

  801. 

  802.     planes = av_pix_fmt_count_planes(avctx->pix_fmt);

  803.     if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16) {

  804.         if (!s->progressive)

  805.             return AVERROR_INVALIDDATA;

  806.         planes = 4;

  807.     }

  808. 

  809.     for (plane = 0; plane < planes && !ret; plane++) {

  810.         /* level 1 */

  811.         int lowpass_height  = s->plane[plane].band[0][0].height;

  812.         int lowpass_width   = s->plane[plane].band[0][0].width;

  813.         int highpass_stride = s->plane[plane].band[0][1].stride;

  814.         int act_plane = plane == 1 ? 2 : plane == 2 ? 1 : plane;

  815.         ptrdiff_t dst_linesize;

  816.         int16_t *low, *high, *output, *dst;

  817. 

  818.         if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16) {

  819.             act_plane = 0;

  820.             dst_linesize = pic->linesize[act_plane];

  821.         } else {

  822.             dst_linesize = pic->linesize[act_plane] / 2;

  823.         }

  824. 

  825.         if (lowpass_height > s->plane[plane].band[0][0].a_height || lowpass_width > s->plane[plane].band[0][0].a_width ||

  826.             !highpass_stride || s->plane[plane].band[0][1].width > s->plane[plane].band[0][1].a_width) {

  827.             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");

  828.             ret = AVERROR(EINVAL);

  829.             goto end;

  830.         }

  831. 

  832.         av_log(avctx, AV_LOG_DEBUG, "Decoding level 1 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);

  833. 

  834.         low    = s->plane[plane].subband[0];

  835.         high   = s->plane[plane].subband[2];

  836.         output = s->plane[plane].l_h[0];

  837.         for (i = 0; i < lowpass_width; i++) {

  838.             vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);

  839.             low++;

  840.             high++;

  841.             output++;

  842.         }

  843. 

  844.         low    = s->plane[plane].subband[1];

  845.         high   = s->plane[plane].subband[3];

  846.         output = s->plane[plane].l_h[1];

  847. 

  848.         for (i = 0; i < lowpass_width; i++) {

  849.             // note the stride of "low" is highpass_stride

  850.             vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);

  851.             low++;

  852.             high++;

  853.             output++;

  854.         }

  855. 

  856.         low    = s->plane[plane].l_h[0];

  857.         high   = s->plane[plane].l_h[1];

  858.         output = s->plane[plane].subband[0];

  859.         for (i = 0; i < lowpass_height * 2; i++) {

  860.             horiz_filter(output, low, high, lowpass_width);

  861.             low    += lowpass_width;

  862.             high   += lowpass_width;

  863.             output += lowpass_width * 2;

  864.         }

  865.         if (s->bpc == 12) {

  866.             output = s->plane[plane].subband[0];

  867.             for (i = 0; i < lowpass_height * 2; i++) {

  868.                 for (j = 0; j < lowpass_width * 2; j++)

  869.                     output[j] *= 4;

  870. 

  871.                 output += lowpass_width * 2;

  872.             }

  873.         }

  874. 

  875.         /* level 2 */

  876.         lowpass_height  = s->plane[plane].band[1][1].height;

  877.         lowpass_width   = s->plane[plane].band[1][1].width;

  878.         highpass_stride = s->plane[plane].band[1][1].stride;

  879. 

  880.         if (lowpass_height > s->plane[plane].band[1][1].a_height || lowpass_width > s->plane[plane].band[1][1].a_width ||

  881.             !highpass_stride || s->plane[plane].band[1][1].width > s->plane[plane].band[1][1].a_width) {

  882.             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");

  883.             ret = AVERROR(EINVAL);

  884.             goto end;

  885.         }

  886. 

  887.         av_log(avctx, AV_LOG_DEBUG, "Level 2 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);

  888. 

  889.         low    = s->plane[plane].subband[0];

  890.         high   = s->plane[plane].subband[5];

  891.         output = s->plane[plane].l_h[3];

  892.         for (i = 0; i < lowpass_width; i++) {

  893.             vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);

  894.             low++;

  895.             high++;

  896.             output++;

  897.         }

  898. 

  899.         low    = s->plane[plane].subband[4];

  900.         high   = s->plane[plane].subband[6];

  901.         output = s->plane[plane].l_h[4];

  902.         for (i = 0; i < lowpass_width; i++) {

  903.             vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);

  904.             low++;

  905.             high++;

  906.             output++;

  907.         }

  908. 

  909.         low    = s->plane[plane].l_h[3];

  910.         high   = s->plane[plane].l_h[4];

  911.         output = s->plane[plane].subband[0];

  912.         for (i = 0; i < lowpass_height * 2; i++) {

  913.             horiz_filter(output, low, high, lowpass_width);

  914.             low    += lowpass_width;

  915.             high   += lowpass_width;

  916.             output += lowpass_width * 2;

  917.         }

  918. 

  919.         output = s->plane[plane].subband[0];

  920.         for (i = 0; i < lowpass_height * 2; i++) {

  921.             for (j = 0; j < lowpass_width * 2; j++)

  922.                 output[j] *= 4;

  923. 

  924.             output += lowpass_width * 2;

  925.         }

  926. 

  927.         /* level 3 */

  928.         lowpass_height  = s->plane[plane].band[2][1].height;

  929.         lowpass_width   = s->plane[plane].band[2][1].width;

  930.         highpass_stride = s->plane[plane].band[2][1].stride;

  931. 

  932.         if (lowpass_height > s->plane[plane].band[2][1].a_height || lowpass_width > s->plane[plane].band[2][1].a_width ||

  933.             !highpass_stride || s->plane[plane].band[2][1].width > s->plane[plane].band[2][1].a_width) {

  934.             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");

  935.             ret = AVERROR(EINVAL);

  936.             goto end;

  937.         }

  938. 

  939.         av_log(avctx, AV_LOG_DEBUG, "Level 3 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);

  940.         if (s->progressive) {

  941.             low    = s->plane[plane].subband[0];

  942.             high   = s->plane[plane].subband[8];

  943.             output = s->plane[plane].l_h[6];

  944.             for (i = 0; i < lowpass_width; i++) {

  945.                 vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);

  946.                 low++;

  947.                 high++;

  948.                 output++;

  949.             }

  950. 

  951.             low    = s->plane[plane].subband[7];

  952.             high   = s->plane[plane].subband[9];

  953.             output = s->plane[plane].l_h[7];

  954.             for (i = 0; i < lowpass_width; i++) {

  955.                 vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);

  956.                 low++;

  957.                 high++;

  958.                 output++;

  959.             }

  960. 

  961.             dst = (int16_t *)pic->data[act_plane];

  962.             if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16) {

  963.                 if (plane & 1)

  964.                     dst++;

  965.                 if (plane > 1)

  966.                     dst += pic->linesize[act_plane] >> 1;

  967.             }

  968.             low  = s->plane[plane].l_h[6];

  969.             high = s->plane[plane].l_h[7];

  970. 

  971.             if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16 &&

  972.                 (lowpass_height * 2 > avctx->coded_height / 2 ||

  973.                  lowpass_width  * 2 > avctx->coded_width  / 2    )

  974.                 ) {

  975.                 ret = AVERROR_INVALIDDATA;

  976.                 goto end;

  977.             }

  978. 

  979.             for (i = 0; i < lowpass_height * 2; i++) {

  980.                 if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16)

  981.                     horiz_filter_clip_bayer(dst, low, high, lowpass_width, s->bpc);

  982.                 else

  983.                     horiz_filter_clip(dst, low, high, lowpass_width, s->bpc);

  984.                 if (avctx->pix_fmt == AV_PIX_FMT_GBRAP12 && act_plane == 3)

  985.                     process_alpha(dst, lowpass_width * 2);

  986.                 low  += lowpass_width;

  987.                 high += lowpass_width;

  988.                 dst  += dst_linesize;

  989.             }

  990.         } else {

  991.             av_log(avctx, AV_LOG_DEBUG, "interlaced frame ? %d", pic->interlaced_frame);

  992.             pic->interlaced_frame = 1;

  993.             low    = s->plane[plane].subband[0];

  994.             high   = s->plane[plane].subband[7];

  995.             output = s->plane[plane].l_h[6];

  996.             for (i = 0; i < lowpass_height; i++) {

  997.                 horiz_filter(output, low, high, lowpass_width);

  998.                 low    += lowpass_width;

  999.                 high   += lowpass_width;

  1000.                 output += lowpass_width * 2;

  1001.             }

  1002. 

  1003.             low    = s->plane[plane].subband[8];

  1004.             high   = s->plane[plane].subband[9];

  1005.             output = s->plane[plane].l_h[7];

  1006.             for (i = 0; i < lowpass_height; i++) {

  1007.                 horiz_filter(output, low, high, lowpass_width);

  1008.                 low    += lowpass_width;

  1009.                 high   += lowpass_width;

  1010.                 output += lowpass_width * 2;

  1011.             }

  1012. 

  1013.             dst  = (int16_t *)pic->data[act_plane];

  1014.             low  = s->plane[plane].l_h[6];

  1015.             high = s->plane[plane].l_h[7];

  1016.             for (i = 0; i < lowpass_height; i++) {

  1017.                 interlaced_vertical_filter(dst, low, high, lowpass_width * 2,  pic->linesize[act_plane]/2, act_plane);

  1018.                 low  += lowpass_width * 2;

  1019.                 high += lowpass_width * 2;

  1020.                 dst  += pic->linesize[act_plane];

  1021.             }

  1022.         }

  1023.     }

  1024. 

  1025. 

  1026.     if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16)

  1027.         process_bayer(pic);

  1028. end:

  1029.     if (ret < 0)

  1030.         return ret;

  1031. 

  1032.     *got_frame = 1;

  1033.     return avpkt->size;

  1034. }

  1035. 

  1036. static av_cold int cfhd_close(AVCodecContext *avctx)

  1037. {

  1038.     CFHDContext *s = avctx->priv_data;

  1039. 

  1040.     free_buffers(s);

  1041. 

  1042.     if (!avctx->internal->is_copy) {

  1043.         ff_free_vlc(&s->vlc_9);

  1044.         ff_free_vlc(&s->vlc_18);

  1045.     }

  1046. 

  1047.     return 0;

  1048. }

  1049. 

  1050. AVCodec ff_cfhd_decoder = {

  1051.     .name             = "cfhd",

  1052.     .long_name        = NULL_IF_CONFIG_SMALL("Cineform HD"),

  1053.     .type             = AVMEDIA_TYPE_VIDEO,

  1054.     .id               = AV_CODEC_ID_CFHD,

  1055.     .priv_data_size   = sizeof(CFHDContext),

  1056.     .init             = cfhd_init,

  1057.     .close            = cfhd_close,

  1058.     .decode           = cfhd_decode,

  1059.     .capabilities     = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,

  1060.     .caps_internal    = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,

  1061. };