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FFmpeg/libavcodec/cfhd.c

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/*
* Copyright (c) 2015-2016 Kieran Kunhya <kieran@kunhya.com>
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; 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 "bitstream.h"
#include "bytestream.h"
#include "internal.h"
#include "thread.h"
#include "cfhd.h"
enum CFHDParam {
ChannelCount = 12,
SubbandCount = 14,
ImageWidth = 20,
ImageHeight = 21,
LowpassPrecision = 35,
SubbandNumber = 48,
Quantization = 53,
ChannelNumber = 62,
BitsPerComponent = 101,
ChannelWidth = 104,
ChannelHeight = 105,
PrescaleShift = 109,
};
static av_cold int cfhd_init(AVCodecContext *avctx)
{
CFHDContext *s = avctx->priv_data;
memset(s, 0, sizeof(*s));
s->avctx = avctx;
avctx->bits_per_raw_sample = 10;
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_frame_defaults(CFHDContext *s)
{
s->coded_format = AV_PIX_FMT_YUV422P10;
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->prescale_shift[0] = 0;
s->prescale_shift[1] = 0;
s->prescale_shift[2] = 0;
s->wavelet_depth = 3;
s->pshift = 1;
s->codebook = 0;
init_plane_defaults(s);
}
/* TODO: merge with VLC tables or use LUT */
static inline int dequant_and_decompand(int level, int quantisation)
{
int64_t abslevel = abs(level);
return (abslevel + ((768 * abslevel * abslevel * abslevel) / (255 * 255 * 255))) *
FFSIGN(level) * quantisation;
}
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;
} 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;
} 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);
if (i == 0) {
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;
} else if (i == len - 1) {
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;
} else {
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 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)
{
unsigned i;
for (i = 0; i < FF_ARRAY_ELEMS(s->plane); i++) {
av_freep(&s->plane[i].idwt_buf);
av_freep(&s->plane[i].idwt_tmp);
}
s->a_height = 0;
s->a_width = 0;
}
static int alloc_buffers(CFHDContext *s)
{
int i, j, ret, planes;
int chroma_x_shift, chroma_y_shift;
unsigned k;
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 ? s->coded_width >> chroma_x_shift : s->coded_width;
int height = i ? s->coded_height >> chroma_y_shift : s->coded_height;
ptrdiff_t stride = FFALIGN(width / 8, 8) * 8;
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 = FFALIGN(s->plane[i].height / 8, 2);
w4 = w8 * 2;
h4 = h8 * 2;
w2 = w4 * 2;
h2 = h4 * 2;
s->plane[i].idwt_buf =
av_malloc_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 parse_tag(CFHDContext *s, GetByteContext *gb,
int16_t *tag_, uint16_t *value, int *planes)
{
/* Bit weird but implement the tag parsing as the spec says */
uint16_t tagu = bytestream2_get_be16(gb);
int16_t tag = tagu;
int8_t tag8 = tagu >> 8;
uint16_t abstag = abs(tag);
int8_t abs_tag8 = abs(tag8);
uint16_t data = bytestream2_get_be16(gb);
*tag_ = tag;
*value = data;
if (abs_tag8 >= 0x60 && abs_tag8 <= 0x6F) {
av_log(s->avctx, AV_LOG_DEBUG, "large len %"PRIX16"\n",
((tagu & 0xFF) << 16) | data);
return 0;
} else if (abstag >= 0x4000 && abstag <= 0x40FF) {
av_log(s->avctx, AV_LOG_DEBUG, "Small chunk length %"PRIu16" %s\n",
data * 4, tag < 0 ? "optional" : "required");
bytestream2_skipu(gb, data * 4);
return 0;
}
switch (tag) {
case 1:
av_log(s->avctx, AV_LOG_DEBUG, "Sample type? %"PRIu16"\n", data);
break;
case 2:
{
int i;
av_log(s->avctx, AV_LOG_DEBUG,
"tag=2 header - skipping %"PRIu16" tag/value pairs\n", data);
if (data > bytestream2_get_bytes_left(gb) / 4) {
av_log(s->avctx, AV_LOG_ERROR,
"Too many tag/value pairs (%"PRIu16")\n", data);
return AVERROR_INVALIDDATA;
}
for (i = 0; i < data; i++) {
uint16_t tag2 = bytestream2_get_be16(gb);
uint16_t val2 = bytestream2_get_be16(gb);
av_log(s->avctx, AV_LOG_DEBUG, "Tag/Value = %"PRIX16" %"PRIX16"\n",
tag2, val2);
}
break;
}
case 10:
if (data != 0) {
avpriv_report_missing_feature(s->avctx, "Transform type %"PRIu16, data);
return AVERROR_PATCHWELCOME;
}
av_log(s->avctx, AV_LOG_DEBUG, "Transform-type? %"PRIu16"\n", data);
break;
case ChannelCount:
av_log(s->avctx, AV_LOG_DEBUG, "Channel count: %"PRIu16"\n", data);
if (data > 4) {
avpriv_report_missing_feature(s->avctx, "Channel count %"PRIu16, data);
return AVERROR_PATCHWELCOME;
}
s->channel_cnt = data;
break;
case SubbandCount:
av_log(s->avctx, AV_LOG_DEBUG, "Subband count: %"PRIu16"\n", data);
if (data != SUBBAND_COUNT) {
avpriv_report_missing_feature(s->avctx, "Subband count %"PRIu16, data);
return AVERROR_PATCHWELCOME;
}
break;
case ImageWidth:
av_log(s->avctx, AV_LOG_DEBUG, "Width %"PRIu16"\n", data);
s->coded_width = data;
break;
case ImageHeight:
av_log(s->avctx, AV_LOG_DEBUG, "Height %"PRIu16"\n", data);
s->coded_height = data;
break;
case 23:
avpriv_report_missing_feature(s->avctx, "Skip frame");
return AVERROR_PATCHWELCOME;
case 27:
av_log(s->avctx, AV_LOG_DEBUG, "Lowpass width %"PRIu16"\n", data);
if (data < 2 || data > s->plane[s->channel_num].band[0][0].a_width) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid lowpass width\n");
return AVERROR_INVALIDDATA;
}
s->plane[s->channel_num].band[0][0].width = data;
s->plane[s->channel_num].band[0][0].stride = data;
break;
case 28:
av_log(s->avctx, AV_LOG_DEBUG, "Lowpass height %"PRIu16"\n", data);
if (data < 2 || data > s->plane[s->channel_num].band[0][0].a_height) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid lowpass height\n");
return AVERROR_INVALIDDATA;
}
s->plane[s->channel_num].band[0][0].height = data;
break;
case LowpassPrecision:
av_log(s->avctx, AV_LOG_DEBUG, "Lowpass precision bits: %"PRIu16"\n", data);
break;
case 41:
case 49:
av_log(s->avctx, AV_LOG_DEBUG,
"Highpass width%s %"PRIu16" channel %i level %i subband %i\n",
tag == 49 ? "2" : "", data,
s->channel_num, s->level, s->subband_num);
if (data < 2) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid highpass width%s\n", tag == 49 ? "2" : "");
return AVERROR_INVALIDDATA;
}
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);
break;
case 42:
case 50:
av_log(s->avctx, AV_LOG_DEBUG, "Highpass height%s %"PRIu16"\n", tag == 50 ? "2" : "", data);
if (data < 2) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid highpass height%s\n", tag == 50 ? "2" : "");
return AVERROR_INVALIDDATA;
}
s->plane[s->channel_num].band[s->level][s->subband_num].height = data;
break;
case SubbandNumber:
av_log(s->avctx, AV_LOG_DEBUG, "Subband number %"PRIu16"\n", data);
if (data > 3) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid subband number\n");
return AVERROR_INVALIDDATA;
}
if (s->subband_num != 0 && data == 1) {
if (s->level + 1 >= DWT_LEVELS) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid level\n");
return AVERROR_INVALIDDATA;
}
s->level++;
}
s->subband_num = data;
break;
case 51:
av_log(s->avctx, AV_LOG_DEBUG, "Subband number actual %"PRIu16"\n", data);
if (data >= SUBBAND_COUNT) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid subband number actual\n");
return AVERROR_INVALIDDATA;
}
s->subband_num_actual = data;
break;
case Quantization:
s->quantisation = data;
av_log(s->avctx, AV_LOG_DEBUG, "Quantisation: %"PRIu16"\n", data);
break;
case ChannelNumber:
av_log(s->avctx, AV_LOG_DEBUG, "Channel number %"PRIu16"\n", data);
if (data >= *planes) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid channel number\n");
return AVERROR_INVALIDDATA;
}
s->channel_num = data;
init_plane_defaults(s);
break;
case 70:
av_log(s->avctx, AV_LOG_DEBUG,
"Subsampling or bit-depth flag? %"PRIu16"\n", data);
if (!(data == 10 || data == 12)) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid bits per channel\n");
return AVERROR_INVALIDDATA;
}
s->bpc = data;
break;
case 71:
s->codebook = data;
av_log(s->avctx, AV_LOG_DEBUG, "Codebook %i\n", s->codebook);
break;
case 72:
s->codebook = data;
av_log(s->avctx, AV_LOG_DEBUG, "Other codebook? %i\n", s->codebook);
break;
case 84:
av_log(s->avctx, AV_LOG_DEBUG, "Sample format? %"PRIu16"\n", data);
switch (data) {
case 1:
s->coded_format = AV_PIX_FMT_YUV422P10;
break;
case 3:
s->coded_format = AV_PIX_FMT_GBRP12;
break;
case 4:
s->coded_format = AV_PIX_FMT_GBRAP12;
break;
default:
avpriv_report_missing_feature(s->avctx, "Sample format %"PRIu16, data);
return AVERROR_PATCHWELCOME;
}
*planes = av_pix_fmt_count_planes(s->coded_format);
break;
case -85:
av_log(s->avctx, AV_LOG_DEBUG, "Cropped height %"PRIu16"\n", data);
s->cropped_height = data;
break;
case 101:
av_log(s->avctx, AV_LOG_DEBUG, "Bits per component: %"PRIu16"\n", data);
s->bpc = data;
break;
case PrescaleShift:
s->prescale_shift[0] = (data >> 0) & 0x7;
s->prescale_shift[1] = (data >> 3) & 0x7;
s->prescale_shift[2] = (data >> 6) & 0x7;
av_log(s->avctx, AV_LOG_DEBUG, "Prescale shift (VC-5): %"PRIX16"\n", data);
break;
default:
av_log(s->avctx, AV_LOG_DEBUG, "Unknown tag %"PRIu16" data %"PRIX16"\n",
tag, data);
}
return 0;
}
static int read_lowpass_coeffs(CFHDContext *s, GetByteContext *gb,
int16_t *coeff_data)
{
int i, j;
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 (lowpass_height > lowpass_a_height ||
lowpass_width > lowpass_a_width ||
lowpass_a_width * lowpass_a_height * sizeof(*coeff_data) > bytestream2_get_bytes_left(gb)) {
av_log(s->avctx, AV_LOG_ERROR, "Too many lowpass coefficients\n");
return AVERROR_INVALIDDATA;
}
av_log(s->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 coefficient line if height is odd. */
if (lowpass_height & 1) {
int16_t *last_line = &coeff_data[lowpass_height * lowpass_width];
memcpy(last_line, &last_line[-lowpass_width],
lowpass_width * sizeof(*coeff_data));
}
av_log(s->avctx, AV_LOG_DEBUG, "Lowpass coefficients %i\n",
lowpass_width * lowpass_height);
return 0;
}
#define DECODE_SUBBAND_COEFFS(TABLE, COND) \
while (1) { \
int level, run, coeff; \
BITSTREAM_RL_VLC(level, run, &s->bc, s->TABLE, VLC_BITS, 3); \
\
/* escape */ \
if (COND) \
break; \
\
count += run; \
\
if (count > expected) { \
av_log(s->avctx, AV_LOG_ERROR, "Escape codeword not found, " \
"probably corrupt data\n"); \
return AVERROR_INVALIDDATA; \
} \
\
coeff = dequant_and_decompand(level, s->quantisation); \
for (i = 0; i < run; i++) \
*coeff_data++ = coeff; \
} \
static int read_highpass_coeffs(CFHDContext *s, GetByteContext *gb,
int16_t *coeff_data)
{
int i, ret;
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;
ptrdiff_t highpass_stride = s->plane[s->channel_num].band[s->level][s->subband_num].stride;
int expected = highpass_height * highpass_stride;
int a_expected = highpass_a_height * highpass_a_width;
int count = 0;
unsigned bytes;
if (highpass_height > highpass_a_height ||
highpass_width > highpass_a_width ||
a_expected < expected) {
av_log(s->avctx, AV_LOG_ERROR, "Too many highpass coefficients\n");
return AVERROR_INVALIDDATA;
}
av_log(s->avctx, AV_LOG_DEBUG,
"Start subband coeffs plane %i level %i codebook %i expected %i\n",
s->channel_num, s->level, s->codebook, expected);
if ((ret = bitstream_init8(&s->bc, gb->buffer,
bytestream2_get_bytes_left(gb))) < 0)
return ret;
if (!s->codebook) {
DECODE_SUBBAND_COEFFS(table_9_rl_vlc, level == 64)
} else {
DECODE_SUBBAND_COEFFS(table_18_rl_vlc, level == 255 && run == 2)
}
bytes = FFALIGN(AV_CEIL_RSHIFT(bitstream_tell(&s->bc), 3), 4);
if (bytes > bytestream2_get_bytes_left(gb)) {
av_log(s->avctx, AV_LOG_ERROR, "Bitstream overread error\n");
return AVERROR_INVALIDDATA;
} else
bytestream2_seek(gb, bytes, SEEK_CUR);
av_log(s->avctx, AV_LOG_DEBUG, "End subband coeffs %i extra %i\n",
count, count - expected);
s->codebook = 0;
/* Copy last coefficient line if height is odd. */
if (highpass_height & 1) {
int16_t *last_line = &coeff_data[expected];
memcpy(last_line, &last_line[-highpass_stride],
highpass_stride * sizeof(*coeff_data));
}
return 0;
}
static int reconstruct_level(CFHDContext *s, AVFrame *pic, int plane, int level)
{
int i, j, idx = level - 1, idx2 = level > 1 ? 1 : 0;
int16_t *low, *high, *output, *dst;
int lowpass_height = s->plane[plane].band[idx][idx2].height;
int lowpass_width = s->plane[plane].band[idx][idx2].width;
ptrdiff_t highpass_stride = s->plane[plane].band[idx][1].stride;
if (lowpass_height > s->plane[plane].band[idx][idx2].a_height ||
lowpass_width > s->plane[plane].band[idx][idx2].a_width ||
s->plane[plane].band[idx][1].width > s->plane[plane].band[idx][1].a_width ||
!highpass_stride) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
return AVERROR_INVALIDDATA;
}
av_log(s->avctx, AV_LOG_DEBUG, "Level %d plane %i %i %i %ti\n",
level, plane, lowpass_height, lowpass_width, highpass_stride);
low = s->plane[plane].subband[0];
high = s->plane[plane].subband[2 + 3 * idx];
output = s->plane[plane].l_h[3 * idx];
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 + 3 * idx];
high = s->plane[plane].subband[3 + 3 * idx];
output = s->plane[plane].l_h[1 + 3 * idx];
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 + 3 * idx];
high = s->plane[plane].l_h[1 + 3 * idx];
if (level != 3) {
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 || level == 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] <<= 2;
output += lowpass_width * 2;
}
}
} else {
int act_plane = plane == 1 ? 2 : plane == 2 ? 1 : plane;
dst = (int16_t *)pic->data[act_plane];
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;
}
}
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 };
int ret = 0, planes, plane;
int16_t tag;
uint16_t value;
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) {
if ((ret = parse_tag(s, &gb, &tag, &value, &planes)) < 0)
return ret;
/* Some kind of end of header tag */
if (tag == 4 && value == 0x1A4A)
break;
}
if (s->coded_width <= 0 || s->coded_height <= 0 || s->coded_format == AV_PIX_FMT_NONE) {
av_log(avctx, AV_LOG_ERROR, "Video dimensions/format missing or invalid\n");
return AVERROR_INVALIDDATA;
}
ret = ff_set_dimensions(s->avctx, s->coded_width, s->coded_height);
if (ret < 0)
return ret;
if (s->cropped_height)
s->avctx->height = s->cropped_height;
s->avctx->pix_fmt = s->coded_format;
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(s)) < 0) {
free_buffers(s);
return ret;
}
}
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;
while (bytestream2_get_bytes_left(&gb) > 4) {
int16_t *coeff_data;
if ((ret = parse_tag(s, &gb, &tag, &value, &planes)) < 0)
return ret;
coeff_data = s->plane[s->channel_num].subband[s->subband_num_actual];
if (tag == 4 && value == 0x0F0F) {
if ((ret = read_lowpass_coeffs(s, &gb, coeff_data)) < 0)
return ret;
} else if (tag == 55 && s->subband_num_actual != 255) {
if ((ret = read_highpass_coeffs(s, &gb, coeff_data)) < 0)
return ret;
}
}
if (s->coded_width || s->coded_height || s->coded_format != AV_PIX_FMT_NONE) {
av_log(avctx, AV_LOG_ERROR, "Invalid dimensions\n");
return AVERROR_INVALIDDATA;
}
planes = av_pix_fmt_count_planes(avctx->pix_fmt);
for (plane = 0; plane < planes; plane++) {
/* level 1 */
if ((ret = reconstruct_level(s, data, plane, 1)) < 0)
return ret;
/* level 2 */
if ((ret = reconstruct_level(s, data, plane, 2)) < 0)
return ret;
/* level 3 */
if ((ret = reconstruct_level(s, data, plane, 3)) < 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);
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,
.init_thread_copy = ONLY_IF_THREADS_ENABLED(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,
};