On 7 February 2016 at 22:21, Rostislav Pehlivanov <atomnu...@gmail.com> wrote:
> Changes from last version:
> -use ptrdiff_t for strides
>
> Signed-off-by: Rostislav Pehlivanov <atomnu...@gmail.com>
> ---
> libavcodec/Makefile | 1 +
> libavcodec/allcodecs.c | 1 +
> libavcodec/vc2enc.c | 1194
> +++++++++++++++++++++++++++++++++++++++++++++++
> libavcodec/vc2enc_dwt.c | 234 ++++++++++
> libavcodec/vc2enc_dwt.h | 54 +++
> 5 files changed, 1484 insertions(+)
> create mode 100644 libavcodec/vc2enc.c
> create mode 100644 libavcodec/vc2enc_dwt.c
> create mode 100644 libavcodec/vc2enc_dwt.h
>
> diff --git a/libavcodec/Makefile b/libavcodec/Makefile
> index 941057b..f6a4fbb 100644
> --- a/libavcodec/Makefile
> +++ b/libavcodec/Makefile
> @@ -543,6 +543,7 @@ OBJS-$(CONFIG_VC1_DECODER) += vc1dec.o
> vc1_block.o vc1_loopfilter.o
> wmv2dsp.o
> OBJS-$(CONFIG_VC1_MMAL_DECODER) += mmaldec.o
> OBJS-$(CONFIG_VC1_QSV_DECODER) += qsvdec_vc1.o
> +OBJS-$(CONFIG_VC2_ENCODER) += vc2enc.o vc2enc_dwt.o diractab.o
> OBJS-$(CONFIG_VCR1_DECODER) += vcr1.o
> OBJS-$(CONFIG_VMDAUDIO_DECODER) += vmdaudio.o
> OBJS-$(CONFIG_VMDVIDEO_DECODER) += vmdvideo.o
> diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
> index c7c1af5..2097db0 100644
> --- a/libavcodec/allcodecs.c
> +++ b/libavcodec/allcodecs.c
> @@ -336,6 +336,7 @@ void avcodec_register_all(void)
> REGISTER_DECODER(VC1IMAGE, vc1image);
> REGISTER_DECODER(VC1_MMAL, vc1_mmal);
> REGISTER_DECODER(VC1_QSV, vc1_qsv);
> + REGISTER_ENCODER(VC2, vc2);
> REGISTER_DECODER(VCR1, vcr1);
> REGISTER_DECODER(VMDVIDEO, vmdvideo);
> REGISTER_DECODER(VMNC, vmnc);
> diff --git a/libavcodec/vc2enc.c b/libavcodec/vc2enc.c
> new file mode 100644
> index 0000000..dbcde0f
> --- /dev/null
> +++ b/libavcodec/vc2enc.c
> @@ -0,0 +1,1194 @@
> +/*
> + * Copyright (C) 2016 Open Broadcast Systems Ltd.
> + * Author (C) 2016 Rostislav Pehlivanov <atomnu...@gmail.com>
> + *
> + * 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
> + */
> +
> +#include "libavutil/ffversion.h"
> +#include "libavutil/pixdesc.h"
> +#include "libavutil/opt.h"
> +#include "dirac.h"
> +#include "put_bits.h"
> +#include "internal.h"
> +
> +#include "vc2enc_dwt.h"
> +#include "diractab.h"
> +
> +/* Quantizations above this usually zero coefficients and lower the quality
> */
> +#define MAX_QUANT_INDEX 49
> +
> +#define COEF_LUT_TAB 2048
> +
> +enum VC2_QM {
> + VC2_QM_DEF = 0,
> + VC2_QM_COL,
> + VC2_QM_FLAT,
> +
> + VC2_QM_NB
> +};
> +
> +typedef struct SubBand {
> + dwtcoef *buf;
> + ptrdiff_t stride;
> + int width;
> + int height;
> +} SubBand;
> +
> +typedef struct Plane {
> + SubBand band[MAX_DWT_LEVELS][4];
> + dwtcoef *coef_buf;
> + int width;
> + int height;
> + int dwt_width;
> + int dwt_height;
> + ptrdiff_t coef_stride;
> +} Plane;
> +
> +typedef struct SliceArgs {
> + PutBitContext pb;
> + void *ctx;
> + int x;
> + int y;
> + int quant_idx;
> + int bits_ceil;
> + int bytes;
> +} SliceArgs;
> +
> +typedef struct TransformArgs {
> + void *ctx;
> + Plane *plane;
> + void *idata;
> + ptrdiff_t istride;
> + int field;
> + VC2TransformContext t;
> +} TransformArgs;
> +
> +typedef struct VC2EncContext {
> + AVClass *av_class;
> + PutBitContext pb;
> + Plane plane[3];
> + AVCodecContext *avctx;
> + DiracVersionInfo ver;
> +
> + SliceArgs *slice_args;
> + TransformArgs transform_args[3];
> +
> + /* For conversion from unsigned pixel values to signed */
> + int diff_offset;
> + int bpp;
> +
> + /* Picture number */
> + uint32_t picture_number;
> +
> + /* Base video format */
> + int base_vf;
> + int level;
> + int profile;
> +
> + /* Quantization matrix */
> + uint8_t quant[MAX_DWT_LEVELS][4];
> +
> + /* Coefficient LUT */
> + uint32_t *coef_lut_val;
> + uint8_t *coef_lut_len;
> +
> + int num_x; /* #slices horizontally */
> + int num_y; /* #slices vertically */
pointles comment imo
> + int prefix_bytes;
> + int size_scaler;
> + int chroma_x_shift;
> + int chroma_y_shift;
> +
> + /* Rate control stuff */
> + int slice_max_bytes;
> + int q_ceil;
> + int q_start;
> +
> + /* Options */
> + double tolerance;
> + int wavelet_idx;
> + int wavelet_depth;
> + int strict_compliance;
> + int slice_height;
> + int slice_width;
> + int interlaced;
> + enum VC2_QM quant_matrix;
> +
> + /* Parse code state */
> + uint32_t next_parse_offset;
> + enum DiracParseCodes last_parse_code;
> +} VC2EncContext;
> +
> +static av_always_inline void put_vc2_ue_uint(PutBitContext *pb, uint32_t val)
> +{
> + int i;
> + int pbits = 0, bits = 0, topbit = 1, maxval = 1;
> +
> + if (!val++) {
> + put_bits(pb, 1, 1);
> + return;
> + }
> +
> + while (val > maxval) {
> + topbit <<= 1;
> + maxval <<= 1;
> + maxval |= 1;
> + }
> +
> + bits = ff_log2(topbit);
> +
> + for (i = 0; i < bits; i++) {
> + topbit >>= 1;
> + pbits <<= 2;
> + if (val & topbit)
> + pbits |= 0x1;
> + }
> +
> + put_bits(pb, bits*2 + 1, (pbits << 1) | 1);
> +}
> +
> +static av_always_inline int count_vc2_ue_uint(uint16_t val)
> +{
> + int topbit = 1, maxval = 1;
> +
> + if (!val++)
> + return 1;
> +
> + while (val > maxval) {
> + topbit <<= 1;
> + maxval <<= 1;
> + maxval |= 1;
> + }
> +
> + return ff_log2(topbit)*2 + 1;
> +}
> +
> +static av_always_inline void get_vc2_ue_uint(uint16_t val, uint8_t *nbits,
> + uint32_t *eval)
> +{
> + int i;
> + int pbits = 0, bits = 0, topbit = 1, maxval = 1;
> +
> + if (!val++) {
> + *nbits = 1;
> + *eval = 1;
> + return;
> + }
> +
> + while (val > maxval) {
> + topbit <<= 1;
> + maxval <<= 1;
> + maxval |= 1;
> + }
> +
> + bits = ff_log2(topbit);
> +
> + for (i = 0; i < bits; i++) {
> + topbit >>= 1;
> + pbits <<= 2;
> + if (val & topbit)
> + pbits |= 0x1;
> + }
> +
> + *nbits = bits*2 + 1;
> + *eval = (pbits << 1) | 1;
> +}
> +
> +/* VC-2 10.4 - parse_info() */
> +static void encode_parse_info(VC2EncContext *s, enum DiracParseCodes pcode)
> +{
> + uint32_t cur_pos, dist;
> +
> + avpriv_align_put_bits(&s->pb);
> +
> + cur_pos = put_bits_count(&s->pb) >> 3;
> +
> + /* Magic string */
> + avpriv_put_string(&s->pb, "BBCD", 0);
> +
> + /* Parse code */
> + put_bits(&s->pb, 8, pcode);
> +
> + /* Next parse offset */
> + dist = cur_pos - s->next_parse_offset;
> + AV_WB32(s->pb.buf + s->next_parse_offset + 5, dist);
> + s->next_parse_offset = cur_pos;
> + put_bits32(&s->pb, pcode == DIRAC_PCODE_END_SEQ ? 13 : 0);
> +
> + /* Last parse offset */
> + put_bits32(&s->pb, s->last_parse_code == DIRAC_PCODE_END_SEQ ? 13 :
> dist);
> +
> + s->last_parse_code = pcode;
> +}
> +
> +/* VC-2 11.1 - parse_parameters()
> + * The level dictates what the decoder should expect in terms of resolution
> + * and allows it to quickly reject whatever it can't support. Remember,
> + * this codec kinda targets cheapo FPGAs without much memory. Unfortunately
> + * it also limits us greatly in our choice of formats, hence the flag to
> disable
> + * strict_compliance */
> +static void encode_parse_params(VC2EncContext *s)
> +{
> + put_vc2_ue_uint(&s->pb, s->ver.major); /* VC-2 demands this to be 2 */
> + put_vc2_ue_uint(&s->pb, s->ver.minor); /* ^^ and this to be 0 */
> + put_vc2_ue_uint(&s->pb, s->profile); /* 3 to signal HQ profile */
> + put_vc2_ue_uint(&s->pb, s->level); /* 3 - 1080/720, 6 - 4K */
> +}
> +
> +/* VC-2 11.3 - frame_size() */
> +static void encode_frame_size(VC2EncContext *s)
> +{
> + put_bits(&s->pb, 1, !s->strict_compliance);
> + if (!s->strict_compliance) {
> + AVCodecContext *avctx = s->avctx;
> + put_vc2_ue_uint(&s->pb, avctx->width);
> + put_vc2_ue_uint(&s->pb, avctx->height);
> + }
> +}
> +
> +/* VC-2 11.3.3 - color_diff_sampling_format() */
> +static void encode_sample_fmt(VC2EncContext *s)
> +{
> + put_bits(&s->pb, 1, !s->strict_compliance);
> + if (!s->strict_compliance) {
> + int idx;
> + if (s->chroma_x_shift == 1 && s->chroma_y_shift == 0)
> + idx = 1; /* 422 */
> + else if (s->chroma_x_shift == 1 && s->chroma_y_shift == 1)
> + idx = 2; /* 420 */
> + else
> + idx = 0; /* 444 */
> + put_vc2_ue_uint(&s->pb, idx);
> + }
> +}
> +
> +/* VC-2 11.3.4 - scan_format() */
> +static void encode_scan_format(VC2EncContext *s)
> +{
> + put_bits(&s->pb, 1, !s->strict_compliance);
> + if (!s->strict_compliance)
> + put_vc2_ue_uint(&s->pb, s->interlaced);
> +}
> +
> +/* VC-2 11.3.5 - frame_rate() */
> +static void encode_frame_rate(VC2EncContext *s)
> +{
> + put_bits(&s->pb, 1, !s->strict_compliance);
> + if (!s->strict_compliance) {
> + AVCodecContext *avctx = s->avctx;
> + put_vc2_ue_uint(&s->pb, 0);
> + put_vc2_ue_uint(&s->pb, avctx->time_base.den);
> + put_vc2_ue_uint(&s->pb, avctx->time_base.num);
> + }
> +}
> +
> +/* VC-2 11.3.6 - aspect_ratio() */
> +static void encode_aspect_ratio(VC2EncContext *s)
> +{
> + put_bits(&s->pb, 1, !s->strict_compliance);
> + if (!s->strict_compliance) {
> + AVCodecContext *avctx = s->avctx;
> + put_vc2_ue_uint(&s->pb, 0);
> + put_vc2_ue_uint(&s->pb, avctx->sample_aspect_ratio.num);
> + put_vc2_ue_uint(&s->pb, avctx->sample_aspect_ratio.den);
> + }
> +}
> +
> +/* VC-2 11.3.7 - clean_area() */
> +static void encode_clean_area(VC2EncContext *s)
> +{
> + put_bits(&s->pb, 1, 0);
> +}
> +
> +/* VC-2 11.3.8 - signal_range() */
> +static void encode_signal_range(VC2EncContext *s)
> +{
> + int idx;
> + AVCodecContext *avctx = s->avctx;
> + const AVPixFmtDescriptor *fmt = av_pix_fmt_desc_get(avctx->pix_fmt);
> + const int depth = fmt->comp[0].depth;
> + if (depth == 8 && avctx->color_range == AVCOL_RANGE_JPEG) {
> + idx = 1;
> + s->bpp = 1;
> + s->diff_offset = 128;
> + } else if (depth == 8 && (avctx->color_range == AVCOL_RANGE_MPEG ||
> + avctx->color_range == AVCOL_RANGE_UNSPECIFIED)) {
> + idx = 2;
> + s->bpp = 1;
> + s->diff_offset = 128;
> + } else if (depth == 10) {
> + idx = 3;
> + s->bpp = 2;
> + s->diff_offset = 512;
> + } else {
> + idx = 4;
> + s->bpp = 2;
> + s->diff_offset = 2048;
> + }
> + put_bits(&s->pb, 1, !s->strict_compliance);
> + if (!s->strict_compliance)
> + put_vc2_ue_uint(&s->pb, idx);
> +}
> +
> +/* VC-2 11.3.9 - color_spec() */
> +static void encode_color_spec(VC2EncContext *s)
> +{
> + AVCodecContext *avctx = s->avctx;
> + put_bits(&s->pb, 1, !s->strict_compliance);
> + if (!s->strict_compliance) {
> + int val;
> + put_vc2_ue_uint(&s->pb, 0);
> +
> + /* primaries */
> + put_bits(&s->pb, 1, 1);
> + if (avctx->color_primaries == AVCOL_PRI_BT470BG)
> + val = 2;
> + else if (avctx->color_primaries == AVCOL_PRI_SMPTE170M)
> + val = 1;
> + else if (avctx->color_primaries == AVCOL_PRI_SMPTE240M)
> + val = 1;
> + else
> + val = 0;
> + put_vc2_ue_uint(&s->pb, val);
> +
> + /* color matrix */
> + put_bits(&s->pb, 1, 1);
> + if (avctx->colorspace == AVCOL_SPC_RGB)
> + val = 3;
> + else if (avctx->colorspace == AVCOL_SPC_YCOCG)
> + val = 2;
> + else if (avctx->colorspace == AVCOL_SPC_BT470BG)
> + val = 1;
> + else
> + val = 0;
> + put_vc2_ue_uint(&s->pb, val);
> +
> + /* transfer function */
> + put_bits(&s->pb, 1, 1);
> + if (avctx->color_trc == AVCOL_TRC_LINEAR)
> + val = 2;
> + else if (avctx->color_trc == AVCOL_TRC_BT1361_ECG)
> + val = 1;
> + else
> + val = 0;
> + put_vc2_ue_uint(&s->pb, val);
> + }
> +}
> +
> +/* VC-2 11.3 - source_parameters() */
> +static void encode_source_params(VC2EncContext *s)
> +{
> + encode_frame_size(s);
> + encode_sample_fmt(s);
> + encode_scan_format(s);
> + encode_frame_rate(s);
> + encode_aspect_ratio(s);
> + encode_clean_area(s);
> + encode_signal_range(s);
> + encode_color_spec(s);
> +}
> +
> +/* VC-2 11 - sequence_header() */
> +static void encode_seq_header(VC2EncContext *s)
> +{
> + avpriv_align_put_bits(&s->pb);
> + encode_parse_params(s);
> + put_vc2_ue_uint(&s->pb, s->base_vf);
> + encode_source_params(s);
> + put_vc2_ue_uint(&s->pb, s->interlaced); /* Frames or fields coding */
> +}
> +
> +/* VC-2 12.1 - picture_header() */
> +static void encode_picture_header(VC2EncContext *s)
> +{
> + avpriv_align_put_bits(&s->pb);
> + put_bits32(&s->pb, s->picture_number++);
> +}
> +
> +/* VC-2 12.3.4.1 - slice_parameters() */
> +static void encode_slice_params(VC2EncContext *s)
> +{
> + put_vc2_ue_uint(&s->pb, s->num_x);
> + put_vc2_ue_uint(&s->pb, s->num_y);
> + put_vc2_ue_uint(&s->pb, s->prefix_bytes);
> + put_vc2_ue_uint(&s->pb, s->size_scaler);
> +}
> +
> +/* 1st idx = LL, second - vertical, third - horizontal, fourth - total */
> +const uint8_t vc2_qm_col_tab[][4] = {
> + {20, 9, 15, 4},
> + {0, 6, 6, 4},
> + {0, 3, 3, 5},
> + {0, 3, 5, 1},
> + {0, 11, 10, 11}
> +};
> +
> +const uint8_t vc2_qm_flat_tab[][4] = {
> + {0, 0, 0, 0},
> + {0, 0, 0, 0},
> + {0, 0, 0, 0},
> + {0, 0, 0, 0},
> + {0, 0, 0, 0}
> +};
> +
> +static void init_custom_qm(VC2EncContext *s)
> +{
> + int level, orientation;
> +
> + if (s->quant_matrix == VC2_QM_DEF) {
> + for (level = 0; level < s->wavelet_depth; level++) {
> + for (orientation = 0; orientation < 4; orientation++) {
> + if (level <= 3)
> + s->quant[level][orientation] =
> ff_dirac_default_qmat[s->wavelet_idx][level][orientation];
> + else
> + s->quant[level][orientation] =
> vc2_qm_col_tab[level][orientation];
> + }
> + }
> + } else if (s->quant_matrix == VC2_QM_COL) {
> + for (level = 0; level < s->wavelet_depth; level++) {
> + for (orientation = 0; orientation < 4; orientation++) {
> + s->quant[level][orientation] =
> vc2_qm_col_tab[level][orientation];
> + }
> + }
> + } else {
> + for (level = 0; level < s->wavelet_depth; level++) {
> + for (orientation = 0; orientation < 4; orientation++) {
> + s->quant[level][orientation] =
> vc2_qm_flat_tab[level][orientation];
> + }
> + }
> + }
> +}
> +
> +/* VC-2 12.3.4.2 - quant_matrix() */
> +static void encode_quant_matrix(VC2EncContext *s)
> +{
> + int level, custom_quant_matrix = 0;
> + if (s->wavelet_depth > 4 || s->quant_matrix != VC2_QM_DEF)
> + custom_quant_matrix = 1;
> + put_bits(&s->pb, 1, custom_quant_matrix);
> + if (custom_quant_matrix) {
> + init_custom_qm(s);
> + put_vc2_ue_uint(&s->pb, s->quant[0][0]);
> + for (level = 0; level < s->wavelet_depth; level++) {
> + put_vc2_ue_uint(&s->pb, s->quant[level][1]);
> + put_vc2_ue_uint(&s->pb, s->quant[level][2]);
> + put_vc2_ue_uint(&s->pb, s->quant[level][3]);
> + }
> + } else {
> + for (level = 0; level < s->wavelet_depth; level++) {
> + s->quant[level][0] =
> ff_dirac_default_qmat[s->wavelet_idx][level][0];
> + s->quant[level][1] =
> ff_dirac_default_qmat[s->wavelet_idx][level][1];
> + s->quant[level][2] =
> ff_dirac_default_qmat[s->wavelet_idx][level][2];
> + s->quant[level][3] =
> ff_dirac_default_qmat[s->wavelet_idx][level][3];
> + }
> + }
> +}
> +
> +/* VC-2 12.3 - transform_parameters() */
> +static void encode_transform_params(VC2EncContext *s)
> +{
> + put_vc2_ue_uint(&s->pb, s->wavelet_idx);
> + put_vc2_ue_uint(&s->pb, s->wavelet_depth);
> +
> + encode_slice_params(s);
> + encode_quant_matrix(s);
> +}
> +
> +/* VC-2 12.2 - wavelet_transform() */
> +static void encode_wavelet_transform(VC2EncContext *s)
> +{
> + encode_transform_params(s);
> + avpriv_align_put_bits(&s->pb);
> + /* Continued after DWT in encode_transform_data() */
> +}
> +
> +/* VC-2 12 - picture_parse() */
> +static void encode_picture_start(VC2EncContext *s)
> +{
> + avpriv_align_put_bits(&s->pb);
> + encode_picture_header(s);
> + avpriv_align_put_bits(&s->pb);
> + encode_wavelet_transform(s);
> +}
> +
> +static av_always_inline void coeff_quantize_get(qcoef coeff, int qfactor,
> int qoffset,
> + uint8_t *len, uint32_t *eval)
> +{
> + uint16_t acoef;
> + int sign = coeff < 0;
> + coeff -= sign;
> + coeff ^= -sign;
> + coeff <<= 2;
> + coeff = (coeff - qoffset)/qfactor;
> + acoef = abs(coeff);
> + get_vc2_ue_uint(acoef, len, eval);
> + if (acoef) {
> + *eval = (*eval << 1) | sign;
> + *len += 1;
> + }
> +}
> +
> +static av_always_inline void coeff_quantize_encode(PutBitContext *pb, qcoef
> coeff,
> + int qfactor, int qoffset)
> +{
> + uint16_t acoef;
> + int sign = coeff < 0;
> + coeff -= sign;
> + coeff ^= -sign;
> + coeff <<= 2;
> + coeff = (coeff - qoffset)/qfactor;
> + acoef = abs(coeff);
> + put_vc2_ue_uint(pb, acoef);
> + if (acoef)
> + put_bits(pb, 1, sign);
> +}
> +
> +/* VC-2 13.5.5.2 - slice_band() */
> +static void encode_subband(VC2EncContext *s, PutBitContext *pb, int sx, int
> sy,
> + SubBand *b, int quant)
> +{
> + int x, y;
> +
> + int left = b->width * (sx+0) / s->num_x;
> + int right = b->width * (sx+1) / s->num_x;
> + int top = b->height * (sy+0) / s->num_y;
> + int bottom = b->height * (sy+1) / s->num_y;
> +
> + int qfactor = ff_dirac_qscale_tab[quant];
> + int qoffset = ff_dirac_qoffset_intra_tab[quant] + 2;
> + uint8_t *len_lut = &s->coef_lut_len[2*quant*COEF_LUT_TAB +
> COEF_LUT_TAB];
> + uint32_t *val_lut = &s->coef_lut_val[2*quant*COEF_LUT_TAB +
> COEF_LUT_TAB];
> +
> + dwtcoef *coeff = b->buf + top * b->stride;
> +
> + for (y = top; y < bottom; y++) {
> + for (x = left; x < right; x++) {
> + if (coeff[x] >= -COEF_LUT_TAB && coeff[x] < COEF_LUT_TAB)
> + put_bits(pb, len_lut[coeff[x]], val_lut[coeff[x]]);
> + else
> + coeff_quantize_encode(pb, coeff[x], qfactor, qoffset);
> + }
> + coeff += b->stride;
> + }
> +}
> +
> +static int count_hq_slice(VC2EncContext *s, int slice_x,
> + int slice_y, int quant_idx)
> +{
> + int x, y, left, right, top, bottom, qfactor, qoffset;
> + uint8_t quants[MAX_DWT_LEVELS][4];
> + int p, level, orientation;
> + int bits = 8*s->prefix_bytes + 40;
> +
> + for (level = 0; level < s->wavelet_depth; level++)
> + for (orientation = !!level; orientation < 4; orientation++)
> + quants[level][orientation] = FFMAX(quant_idx -
> s->quant[level][orientation], 0);
> +
> + for (p = 0; p < 3; p++) {
> + int bytes_start, bytes_end, bytes_len, bytes_pad;
> + bytes_start = bits >> 3;
> + for (level = 0; level < s->wavelet_depth; level++) {
> + for (orientation = !!level; orientation < 4; orientation++) {
> + dwtcoef *buf;
> + SubBand *b = &s->plane[p].band[level][orientation];
> +
> + quant_idx = quants[level][orientation];
> + qfactor = ff_dirac_qscale_tab[quant_idx];
> + qoffset = ff_dirac_qoffset_intra_tab[quant_idx] + 2;
> +
> + left = b->width * slice_x / s->num_x;
> + right = b->width *(slice_x+1) / s->num_x;
> + top = b->height * slice_y / s->num_y;
> + bottom = b->height *(slice_y+1) / s->num_y;
> +
> + buf = b->buf + top * b->stride;
> +
> + for (y = top; y < bottom; y++) {
> + for (x = left; x < right; x++) {
> + qcoef coeff = (qcoef)buf[x];
> + if (coeff >= -COEF_LUT_TAB && coeff < COEF_LUT_TAB) {
> + bits += s->coef_lut_len[2*quant_idx*COEF_LUT_TAB
> + coeff + COEF_LUT_TAB];
> + } else {
> + const int sign = coeff < 0;
> + coeff -= sign;
> + coeff ^= -sign;
> + coeff <<= 2;
> + coeff = (coeff - qoffset)/qfactor;
> + bits += count_vc2_ue_uint(abs(coeff));
> + bits += !!coeff;
> + }
> + }
> + buf += b->stride;
> + }
> + }
> + }
> + bytes_end = bits >> 3;
> + bytes_len = FFALIGN((bytes_end - bytes_start), 64)/s->size_scaler;
> + bytes_pad = (bytes_len*s->size_scaler) - (bytes_end - bytes_start);
> + bits += bytes_pad*8;
> + }
> +
> + return bits;
> +}
> +
> +/* Approaches the best possible quantizer asymptotically, its kinda exaustive
> + * but we have a LUT to get the coefficient size in bits. Guaranteed to never
> + * overshoot, which is apparently very important when streaming */
> +static int rate_control(AVCodecContext *avctx, void *arg)
> +{
> + SliceArgs *slice_dat = arg;
> + VC2EncContext *s = slice_dat->ctx;
> + const int sx = slice_dat->x;
> + const int sy = slice_dat->y;
> + int quant_buf[2], bits_buf[2], quant = s->q_start, range = s->q_start/3;
> + const int64_t top = slice_dat->bits_ceil;
> + const double percent = s->tolerance;
> + const double bottom = top - top*(percent/100.0f);
> + int bits = count_hq_slice(s, sx, sy, quant);
> + range -= range & 1; /* Make it an even number */
> + while ((bits > top) || (bits < bottom)) {
> + range *= bits > top ? +1 : -1;
> + quant = av_clip(quant + range, 0, s->q_ceil);
> + bits = count_hq_slice(s, sx, sy, quant);
> + range = av_clip(range/2, 1, s->q_ceil);
> + if (quant_buf[1] == quant) {
> + quant = bits_buf[0] < bits ? quant_buf[0] : quant;
> + bits = bits_buf[0] < bits ? bits_buf[0] : bits;
> + break;
> + }
> + quant_buf[1] = quant_buf[0];
> + quant_buf[0] = quant;
> + bits_buf[1] = bits_buf[0];
> + bits_buf[0] = bits;
> + }
> + slice_dat->quant_idx = av_clip(++quant, 0, s->q_ceil);
> + slice_dat->bytes = FFALIGN((bits >> 3), s->size_scaler) + 4;
> +
> + return 0;
> +}
> +
> +/* VC-2 13.5.3 - hq_slice */
> +static int encode_hq_slice(AVCodecContext *avctx, void *arg)
> +{
> + SliceArgs *slice_dat = arg;
> + VC2EncContext *s = slice_dat->ctx;
> + PutBitContext *pb = &slice_dat->pb;
> + const int slice_x = slice_dat->x;
> + const int slice_y = slice_dat->y;
> + const int quant_idx = slice_dat->quant_idx;
> + const int slice_bytes_max = slice_dat->bytes;
> + uint8_t quants[MAX_DWT_LEVELS][4];
> + int p, j, level, orientation;
> + int slice_bytes_start = put_bits_count(pb) >> 3;
> +
> + avpriv_align_put_bits(pb);
> + put_bits(pb, 8*s->prefix_bytes, 0);
> + put_bits(pb, 8, quant_idx);
> +
> + /* Slice quantization (slice_quantizers() in the specs) */
> + for (level = 0; level < s->wavelet_depth; level++)
> + for (orientation = !!level; orientation < 4; orientation++)
> + quants[level][orientation] = FFMAX(quant_idx -
> s->quant[level][orientation], 0);
> +
> + /* Luma + 2 Chroma planes */
> + for (p = 0; p < 3; p++) {
> + int bytes_start, bytes_len, pad_s, pad_c;
> + avpriv_align_put_bits(pb);
> + bytes_start = put_bits_count(pb) >> 3;
> + put_bits(pb, 8, 0);
> + /*
> + * Orientation 0 (LL) only exists for the very first level, hence why
> + * orientation starts at !!level.
> + */
> + for (level = 0; level < s->wavelet_depth; level++) {
> + for (orientation = !!level; orientation < 4; orientation++) {
> + encode_subband(s, pb, slice_x, slice_y,
> + &s->plane[p].band[level][orientation],
> + quants[level][orientation]);
> + }
> + }
> + avpriv_align_put_bits(pb);
> + bytes_len = (put_bits_count(pb) >> 3) - bytes_start - 1;
> + if (p == 2) {
> + int slice_bytes_end = (put_bits_count(pb) >> 3);
> + int slice_bytes_len = (slice_bytes_end - slice_bytes_start);
> + int len_diff = slice_bytes_max - slice_bytes_len;
> + pad_s = FFALIGN((bytes_len + len_diff),
> s->size_scaler)/s->size_scaler;
> + pad_c = (pad_s*s->size_scaler) - bytes_len;
> + } else {
> + pad_s = FFALIGN(bytes_len, s->size_scaler)/s->size_scaler;
> + pad_c = (pad_s*s->size_scaler) - bytes_len;
> + }
> + pb->buf[bytes_start] = pad_s;
> + for (j = 0; j < pad_c; j++)
> + put_bits(pb, 8, 0);
> + }
> +
> + return 0;
> +}
> +
> +/* VC-2 13.5.1 - low_delay_transform_data() */
> +static int encode_slices(VC2EncContext *s)
> +{
> + uint8_t *buf;
> + int slice_x, slice_y, skip = 0;
> + SliceArgs *enc_args = s->slice_args;
> +
> + avpriv_align_put_bits(&s->pb);
> +
> + flush_put_bits(&s->pb);
> +
> + buf = put_bits_ptr(&s->pb);
> +
> + for (slice_y = 0; slice_y < s->num_y; slice_y++) {
> + for (slice_x = 0; slice_x < s->num_x; slice_x++) {
> + SliceArgs *args = &enc_args[s->num_x*slice_y + slice_x];
> + args->ctx = s;
> + args->x = slice_x;
> + args->y = slice_y;
> + args->bits_ceil = s->slice_max_bytes << 3;
> + }
> + }
> +
> + /* Determine quantization indices and bytes per slice */
> + s->avctx->execute(s->avctx, rate_control, enc_args, NULL,
> s->num_x*s->num_y,
> + sizeof(SliceArgs));
> +
> + for (slice_y = 0; slice_y < s->num_y; slice_y++) {
> + for (slice_x = 0; slice_x < s->num_x; slice_x++) {
> + SliceArgs *args = &enc_args[s->num_x*slice_y + slice_x];
> + init_put_bits(&args->pb, buf + skip, 2*args->bytes);
> + s->q_start = (s->q_start + args->quant_idx)/2;
> + skip += args->bytes;
> + }
> + }
> +
> + s->avctx->execute(s->avctx, encode_hq_slice, enc_args, NULL,
> s->num_x*s->num_y,
> + sizeof(SliceArgs));
> +
> + skip_put_bytes(&s->pb, skip);
> +
> + return 0;
> +}
> +
> +/*
> + * Transform basics for a 3 level transform
> + * |---------------------------------------------------------------------|
> + * | LL-0 | HL-0 | | |
> + * |--------|-------| HL-1 | |
> + * | LH-0 | HH-0 | | |
> + * |----------------|-----------------| HL-2 |
> + * | | | |
> + * | LH-1 | HH-1 | |
> + * | | | |
> + * |----------------------------------|----------------------------------|
> + * | | |
> + * | | |
> + * | | |
> + * | LH-2 | HH-2 |
> + * | | |
> + * | | |
> + * | | |
> + * |---------------------------------------------------------------------|
> + *
> + * DWT transforms are generally applied by splitting the image in two
> vertically
> + * and applying a low pass transform on the left part and a corresponding
> high
> + * pass transform on the right hand side. This is known as the horizontal
> filter
> + * stage.
> + * After that, the same operation is performed except the image is divided
> + * horizontally, with the high pass on the lower and the low pass on the
> higher
> + * side.
> + * Therefore, you're left with 4 subdivisions - known as low-low, low-high,
> + * high-low and high-high. They're referred to as orientations in the decoder
> + * and encoder.
> + *
> + * The LL (low-low) area contains the original image downsampled by the
> amount
> + * of levels. The rest of the areas can be thought as the details needed
> + * to restore the image perfectly to its original size.
> + */
> +
> +
> +static int dwt_plane(AVCodecContext *avctx, void *arg)
> +{
> + TransformArgs *transform_dat = arg;
> + VC2EncContext *s = transform_dat->ctx;
> + const void *frame_data = transform_dat->idata;
> + const ptrdiff_t linesize = transform_dat->istride;
> + const int field = transform_dat->field;
> + const Plane *p = transform_dat->plane;
> + VC2TransformContext *t = &transform_dat->t;
> + dwtcoef *buf = p->coef_buf;
> + const int idx = s->wavelet_idx;
> + const int skip = 1 + s->interlaced;
> +
> + int x, y, level, offset;
> + ptrdiff_t pix_stride = linesize >> (s->bpp - 1);
> +
> + if (field == 1) {
> + offset = 0;
> + pix_stride <<= 1;
> + } else if (field == 2) {
> + offset = pix_stride;
> + pix_stride <<= 1;
> + } else {
> + offset = 0;
> + }
> +
> + if (s->bpp == 1) {
> + const uint8_t *pix = (const uint8_t *)frame_data + offset;
> + for (y = 0; y < p->height*skip; y+=skip) {
> + for (x = 0; x < p->width; x++) {
> + buf[x] = pix[x] - s->diff_offset;
> + }
> + buf += p->coef_stride;
> + pix += pix_stride;
> + }
> + } else {
> + const uint16_t *pix = (const uint16_t *)frame_data + offset;
> + for (y = 0; y < p->height*skip; y+=skip) {
> + for (x = 0; x < p->width; x++) {
> + buf[x] = pix[x] - s->diff_offset;
> + }
> + buf += p->coef_stride;
> + pix += pix_stride;
> + }
> + }
> +
> + memset(buf, 0, (p->coef_stride*p->dwt_height -
> p->height*p->width)*sizeof(dwtcoef));
> +
> + for (level = s->wavelet_depth-1; level >= 0; level--) {
> + const SubBand *b = &p->band[level][0];
> + t->vc2_subband_dwt[idx](t, p->coef_buf, p->coef_stride,
> + b->width, b->height);
> + }
> +
> + return 0;
> +}
> +
> +static void encode_frame(VC2EncContext *s, const AVFrame *frame,
> + const char *aux_data, int field)
> +{
> + int i;
> +
> + /* Sequence header */
> + encode_parse_info(s, DIRAC_PCODE_SEQ_HEADER);
> + encode_seq_header(s);
> +
> + /* Encoder version */
> + if (aux_data) {
> + encode_parse_info(s, DIRAC_PCODE_AUX);
> + avpriv_put_string(&s->pb, aux_data, 1);
> + }
> +
> + /* Picture header */
> + encode_parse_info(s, DIRAC_PCODE_PICTURE_HQ);
> + encode_picture_start(s);
> +
> + for (i = 0; i < 3; i++) {
> + s->transform_args[i].ctx = s;
> + s->transform_args[i].field = field;
> + s->transform_args[i].plane = &s->plane[i];
> + s->transform_args[i].idata = frame->data[i];
> + s->transform_args[i].istride = frame->linesize[i];
> + }
> +
> + /* Do a DWT transform */
> + s->avctx->execute(s->avctx, dwt_plane, s->transform_args, NULL, 3,
> + sizeof(TransformArgs));
> +
> + /* Init planes and encode slices */
> + encode_slices(s);
> +
> + /* End sequence */
> + encode_parse_info(s, DIRAC_PCODE_END_SEQ);
> +}
> +
> +static av_cold int vc2_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
> + const AVFrame *frame, int
> *got_packet_ptr)
> +{
> + int ret;
> + int max_frame_bytes, sig_size = 256;
> + VC2EncContext *s = avctx->priv_data;
> + const char aux_data[] = "FFmpeg version "FFMPEG_VERSION;
> + const int aux_data_size = sizeof(aux_data);
> + const int header_size = 100 + aux_data_size;
> + int64_t r_bitrate = avctx->bit_rate >> (s->interlaced);
> +
> + s->avctx = avctx;
> + s->size_scaler = 1;
> + s->prefix_bytes = 0;
> + s->last_parse_code = 0;
> + s->next_parse_offset = 0;
> +
> + /* Rate control */
> + max_frame_bytes = (av_rescale(r_bitrate, s->avctx->time_base.num,
> + s->avctx->time_base.den) >> 3) -
> header_size;
> +
> + /* Find an appropriate size scaler */
> + while (sig_size > 255) {
> + s->slice_max_bytes = FFALIGN(av_rescale(max_frame_bytes, 1,
> s->num_x*s->num_y), s->size_scaler) + 4;
> + sig_size = s->slice_max_bytes/s->size_scaler; /* Signalled slize
> size */
> + s->size_scaler <<= 1;
> + }
> +
> + ret = ff_alloc_packet2(avctx, avpkt, max_frame_bytes*2, 0);
> + if (ret < 0) {
> + av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
> + return ret;
> + }
> +
> + /* Init PB */
> + init_put_bits(&s->pb, avpkt->data, avpkt->size);
> +
> + encode_frame(s, frame, aux_data, s->interlaced);
> + if (s->interlaced)
> + encode_frame(s, frame, NULL, 2);
> +
> + flush_put_bits(&s->pb);
> + avpkt->size = put_bits_count(&s->pb) >> 3;
> +
> + *got_packet_ptr = 1;
> +
> + return 0;
> +}
> +
> +static av_cold int vc2_encode_end(AVCodecContext *avctx)
> +{
> + int i;
> + VC2EncContext *s = avctx->priv_data;
> +
> + for (i = 0; i < 3; i++) {
> + ff_vc2enc_free_transforms(&s->transform_args[i].t);
> + av_freep(&s->plane[i].coef_buf);
> + }
> +
> + av_freep(&s->slice_args);
> + av_freep(&s->coef_lut_len);
> + av_freep(&s->coef_lut_val);
> +
> + return 0;
> +}
> +
> +
> +static av_cold int vc2_encode_init(AVCodecContext *avctx)
> +{
> + Plane *p;
> + SubBand *b;
> + int i, j, level, o, shift;
> + VC2EncContext *s = avctx->priv_data;
> +
> + s->picture_number = 0;
> +
> + /* Total allowed quantization range */
> + s->q_ceil = MAX_QUANT_INDEX;
> +
> + s->ver.major = 2;
> + s->ver.minor = 0;
> + s->profile = 3;
> + s->level = 3;
> +
> + s->base_vf = -1;
> + s->strict_compliance = 1;
> +
> + /* Mark unknown as progressive */
> + s->interlaced = !((avctx->field_order == AV_FIELD_UNKNOWN) ||
> + (avctx->field_order == AV_FIELD_PROGRESSIVE));
> +
> + if (avctx->pix_fmt == AV_PIX_FMT_YUV422P10) {
> + if (avctx->width == 1280 && avctx->height == 720) {
> + s->level = 3;
> + if (avctx->time_base.num == 1001 && avctx->time_base.den ==
> 60000)
> + s->base_vf = 9;
> + if (avctx->time_base.num == 1 && avctx->time_base.den == 50)
> + s->base_vf = 10;
> + } else if (avctx->width == 1920 && avctx->height == 1080) {
> + s->level = 3;
> + if (s->interlaced) {
> + if (avctx->time_base.num == 1001 && avctx->time_base.den ==
> 30000)
> + s->base_vf = 11;
> + if (avctx->time_base.num == 1 && avctx->time_base.den == 50)
> + s->base_vf = 12;
> + } else {
> + if (avctx->time_base.num == 1001 && avctx->time_base.den ==
> 60000)
> + s->base_vf = 13;
> + if (avctx->time_base.num == 1 && avctx->time_base.den == 50)
> + s->base_vf = 14;
> + if (avctx->time_base.num == 1001 && avctx->time_base.den ==
> 24000)
> + s->base_vf = 21;
> + }
> + } else if (avctx->width == 3840 && avctx->height == 2160) {
> + s->level = 6;
> + if (avctx->time_base.num == 1001 && avctx->time_base.den ==
> 60000)
> + s->base_vf = 17;
> + if (avctx->time_base.num == 1 && avctx->time_base.den == 50)
> + s->base_vf = 18;
> + }
> + }
> +
> + if (s->interlaced && s->base_vf <= 0) {
> + av_log(avctx, AV_LOG_ERROR, "Interlacing not supported with non
> standard formats!\n");
> + return AVERROR_UNKNOWN;
> + }
> +
> + if (s->interlaced)
> + av_log(avctx, AV_LOG_WARNING, "Interlacing enabled!\n");
> +
> + if ((s->slice_width & (s->slice_width - 1)) ||
> + (s->slice_height & (s->slice_height - 1))) {
> + av_log(avctx, AV_LOG_ERROR, "Slice size is not a power of two!\n");
> + return AVERROR_UNKNOWN;
> + }
> +
> + if ((s->slice_width > avctx->width) ||
> + (s->slice_height > avctx->height)) {
> + av_log(avctx, AV_LOG_ERROR, "Slice size is bigger than the
> image!\n");
> + return AVERROR_UNKNOWN;
> + }
> +
> + if (s->base_vf <= 0) {
> + if (avctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
> + s->strict_compliance = s->base_vf = 0;
> + av_log(avctx, AV_LOG_WARNING, "Disabling strict compliance\n");
> + } else {
> + av_log(avctx, AV_LOG_WARNING, "Given format does not strictly
> comply with "
> + "the specifications, please add a -strict -1 flag to use
> it\n");
> + return AVERROR_UNKNOWN;
> + }
> + } else {
> + av_log(avctx, AV_LOG_INFO, "Selected base video format = %i\n",
> s->base_vf);
> + }
> +
> + avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_x_shift,
> &s->chroma_y_shift);
> +
> + /* Planes initialization */
> + for (i = 0; i < 3; i++) {
> + int w, h;
> + p = &s->plane[i];
> + p->width = avctx->width >> (i ? s->chroma_x_shift : 0);
> + p->height = avctx->height >> (i ? s->chroma_y_shift : 0);
> + if (s->interlaced)
> + p->height >>= 1;
> + p->dwt_width = w = FFALIGN(p->width, (1 << s->wavelet_depth));
> + p->dwt_height = h = FFALIGN(p->height, (1 << s->wavelet_depth));
> + p->coef_stride = FFALIGN(p->dwt_width, 32);
> + p->coef_buf =
> av_malloc(p->coef_stride*p->dwt_height*sizeof(dwtcoef));
> + if (!p->coef_buf)
> + goto alloc_fail;
> + for (level = s->wavelet_depth-1; level >= 0; level--) {
> + w = w >> 1;
> + h = h >> 1;
> + for (o = 0; o < 4; o++) {
> + b = &p->band[level][o];
> + b->width = w;
> + b->height = h;
> + b->stride = p->coef_stride;
> + shift = (o > 1)*b->height*b->stride + (o & 1)*b->width;
> + b->buf = p->coef_buf + shift;
> + }
> + }
> +
> + /* DWT init */
> + if (ff_vc2enc_init_transforms(&s->transform_args[i].t,
> + s->plane[0].coef_stride,
> + s->plane[0].dwt_height))
> + goto alloc_fail;
> + }
> +
> + /* Slices */
> + s->num_x = s->plane[0].dwt_width/s->slice_width;
> + s->num_y = s->plane[0].dwt_height/s->slice_height;
> +
> + s->slice_args = av_malloc(s->num_x*s->num_y*sizeof(SliceArgs));
> + if (!s->slice_args)
> + goto alloc_fail;
> +
> + /* Lookup tables */
> + s->coef_lut_len =
> av_malloc(2*COEF_LUT_TAB*s->q_ceil*sizeof(*s->coef_lut_len));
> + if (!s->coef_lut_len)
> + goto alloc_fail;
> +
> + s->coef_lut_val =
> av_malloc(2*COEF_LUT_TAB*s->q_ceil*sizeof(*s->coef_lut_val));
> + if (!s->coef_lut_val)
> + goto alloc_fail;
> +
> + for (i = 0; i < s->q_ceil; i++) {
> + for (j = -COEF_LUT_TAB; j < COEF_LUT_TAB; j++) {
> + uint8_t *len_lut = &s->coef_lut_len[2*i*COEF_LUT_TAB +
> COEF_LUT_TAB];
> + uint32_t *val_lut = &s->coef_lut_val[2*i*COEF_LUT_TAB +
> COEF_LUT_TAB];
> + coeff_quantize_get(j, ff_dirac_qscale_tab[i],
> ff_dirac_qoffset_intra_tab[i] + 2, &len_lut[j], &val_lut[j]);
> + }
> + }
> +
> + return 0;
> +
> +alloc_fail:
> + vc2_encode_end(avctx);
> + av_log(avctx, AV_LOG_ERROR, "Unable to allocate memory!\n");
> + return AVERROR(ENOMEM);
> +}
> +
> +#define VC2ENC_FLAGS (AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
> +static const AVOption vc2enc_options[] = {
> + {"tolerance", "Max undershoot in percent", offsetof(VC2EncContext,
> tolerance), AV_OPT_TYPE_DOUBLE, {.dbl = 10.0f}, 0.0f, 45.0f, VC2ENC_FLAGS,
> "tolerance"},
> + {"slice_width", "Slice width", offsetof(VC2EncContext, slice_width),
> AV_OPT_TYPE_INT, {.i64 = 128}, 32, 1024, VC2ENC_FLAGS, "slice_width"},
> + {"slice_height", "Slice height", offsetof(VC2EncContext, slice_height),
> AV_OPT_TYPE_INT, {.i64 = 64}, 8, 1024, VC2ENC_FLAGS, "slice_height"},
> + {"wavelet_depth", "Transform depth", offsetof(VC2EncContext,
> wavelet_depth), AV_OPT_TYPE_INT, {.i64 = 5}, 1, 5, VC2ENC_FLAGS,
> "wavelet_depth"},
> + {"wavelet_type", "Transform type", offsetof(VC2EncContext,
> wavelet_idx), AV_OPT_TYPE_INT, {.i64 = VC2_TRANSFORM_9_7}, 0,
> VC2_TRANSFORMS_NB, VC2ENC_FLAGS, "wavelet_idx"},
> + {"9_7", "Deslauriers-Dubuc (9,7)", 0, AV_OPT_TYPE_CONST, {.i64
> = VC2_TRANSFORM_9_7}, INT_MIN, INT_MAX, VC2ENC_FLAGS, "wavelet_idx"},
> + {"5_3", "LeGall (5,3)", 0, AV_OPT_TYPE_CONST, {.i64
> = VC2_TRANSFORM_5_3}, INT_MIN, INT_MAX, VC2ENC_FLAGS, "wavelet_idx"},
> + {"quant_matrix", "Custom quantization matrix", offsetof(VC2EncContext,
> quant_matrix), AV_OPT_TYPE_INT, {.i64 = VC2_QM_DEF}, 0, VC2_QM_NB,
> VC2ENC_FLAGS, "quant_matrix"},
> + {"default", "Default from the specifications", 0,
> AV_OPT_TYPE_CONST, {.i64 = VC2_QM_DEF}, INT_MIN, INT_MAX, VC2ENC_FLAGS,
> "quant_matrix"},
> + {"color", "Prevents low bitrate discoloration", 0,
> AV_OPT_TYPE_CONST, {.i64 = VC2_QM_COL}, INT_MIN, INT_MAX, VC2ENC_FLAGS,
> "quant_matrix"},
> + {"flat", "Optimize for PSNR", 0, AV_OPT_TYPE_CONST, {.i64 =
> VC2_QM_FLAT}, INT_MIN, INT_MAX, VC2ENC_FLAGS, "quant_matrix"},
> + {NULL}
> +};
> +
> +static const AVClass vc2enc_class = {
> + .class_name = "SMPTE VC-2 encoder",
> + .category = AV_CLASS_CATEGORY_ENCODER,
> + .option = vc2enc_options,
> + .item_name = av_default_item_name,
> + .version = LIBAVUTIL_VERSION_INT
> +};
> +
> +static const AVCodecDefault vc2enc_defaults[] = {
> + { "b", "600000000" },
> + { NULL },
> +};
> +
> +static const enum AVPixelFormat allowed_pix_fmts[] = {
> + AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P,
> + AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
> + AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12,
> + AV_PIX_FMT_NONE
> +};
> +
> +AVCodec ff_vc2_encoder = {
> + .name = "vc2",
> + .long_name = NULL_IF_CONFIG_SMALL("SMPTE VC-2"),
> + .type = AVMEDIA_TYPE_VIDEO,
> + .id = AV_CODEC_ID_DIRAC,
> + .priv_data_size = sizeof(VC2EncContext),
> + .init = vc2_encode_init,
> + .close = vc2_encode_end,
> + .capabilities = AV_CODEC_CAP_SLICE_THREADS,
> + .encode2 = vc2_encode_frame,
> + .priv_class = &vc2enc_class,
> + .defaults = vc2enc_defaults,
> + .pix_fmts = allowed_pix_fmts
> +};
> diff --git a/libavcodec/vc2enc_dwt.c b/libavcodec/vc2enc_dwt.c
> new file mode 100644
> index 0000000..873c36e
> --- /dev/null
> +++ b/libavcodec/vc2enc_dwt.c
> @@ -0,0 +1,234 @@
> +/*
> + * Copyright (C) 2007 Marco Gerards <ma...@gnu.org>
> + * Copyright (C) 2016 Open Broadcast Systems Ltd.
> + * Author (C) 2016 Rostislav Pehlivanov <atomnu...@gmail.com>
> + *
> + * 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
> + */
> +
> +#include "libavutil/attributes.h"
> +#include "libavutil/mem.h"
> +#include "vc2enc_dwt.h"
> +
> +/* Since the transforms spit out interleaved coefficients, this function
> + * rearranges the coefficients into the more traditional subdivision,
> + * making it easier to encode and perform another level. */
> +static av_always_inline void deinterleave(dwtcoef *linell, ptrdiff_t stride,
> + int width, int height, dwtcoef
> *synthl)
> +{
> + int x, y;
> + ptrdiff_t synthw = width << 1;
> + dwtcoef *linehl = linell + width;
> + dwtcoef *linelh = linell + height*stride;
> + dwtcoef *linehh = linelh + width;
> +
> + /* Deinterleave the coefficients. */
> + for (y = 0; y < height; y++) {
> + for (x = 0; x < width; x++) {
> + linell[x] = synthl[(x << 1)];
> + linehl[x] = synthl[(x << 1) + 1];
> + linelh[x] = synthl[(x << 1) + synthw];
> + linehh[x] = synthl[(x << 1) + synthw + 1];
> + }
> + synthl += synthw << 1;
> + linell += stride;
> + linelh += stride;
> + linehl += stride;
> + linehh += stride;
> + }
> +}
> +
> +static void vc2_subband_dwt_97(VC2TransformContext *t, dwtcoef *data,
> + ptrdiff_t stride, int width, int height)
> +{
> + int x, y;
> + dwtcoef *datal = data, *synth = t->buffer, *synthl = synth;
> + const ptrdiff_t synth_width = width << 1;
> + const ptrdiff_t synth_height = height << 1;
> +
> + /*
> + * Shift in one bit that is used for additional precision and copy
> + * the data to the buffer.
> + */
> + for (y = 0; y < synth_height; y++) {
> + for (x = 0; x < synth_width; x++)
> + synthl[x] = datal[x] << 1;
> + synthl += synth_width;
> + datal += stride;
> + }
> +
> + /* Horizontal synthesis. */
> + synthl = synth;
> + for (y = 0; y < synth_height; y++) {
> + /* Lifting stage 2. */
> + synthl[1] -= (8*synthl[0] + 9*synthl[2] - synthl[4] + 8) >> 4;
> + for (x = 1; x < width - 2; x++)
> + synthl[2*x + 1] -= (9*synthl[2*x] + 9*synthl[2*x + 2] -
> synthl[2*x + 4] -
> + synthl[2 * x - 2] + 8) >> 4;
> + synthl[synth_width - 1] -= (17*synthl[synth_width - 2] -
> + synthl[synth_width - 4] + 8) >> 4;
> + synthl[synth_width - 3] -= (8*synthl[synth_width - 2] +
> + 9*synthl[synth_width - 4] -
> + synthl[synth_width - 6] + 8) >> 4;
> + /* Lifting stage 1. */
> + synthl[0] += (synthl[1] + synthl[1] + 2) >> 2;
> + for (x = 1; x < width - 1; x++)
> + synthl[2*x] += (synthl[2*x - 1] + synthl[2*x + 1] + 2) >> 2;
> +
> + synthl[synth_width - 2] += (synthl[synth_width - 3] +
> + synthl[synth_width - 1] + 2) >> 2;
> + synthl += synth_width;
> + }
> +
> + /* Vertical synthesis: Lifting stage 2. */
> + synthl = synth + synth_width;
> + for (x = 0; x < synth_width; x++)
> + synthl[x] -= (8*synthl[x - synth_width] + 9*synthl[x + synth_width] -
> + synthl[x + 3 * synth_width] + 8) >> 4;
> +
> + synthl = synth + (synth_width << 1);
> + for (y = 1; y < height - 2; y++) {
> + for (x = 0; x < synth_width; x++)
> + synthl[x + synth_width] -= (9*synthl[x] +
> + 9*synthl[x + 2 * synth_width] -
> + synthl[x - 2 * synth_width] -
> + synthl[x + 4 * synth_width] + 8) >> 4;
> + synthl += synth_width << 1;
> + }
> +
> + synthl = synth + (synth_height - 1) * synth_width;
> + for (x = 0; x < synth_width; x++) {
> + synthl[x] -= (17*synthl[x - synth_width] -
> + synthl[x - 3*synth_width] + 8) >> 4;
> + synthl[x - 2*synth_width] -= (9*synthl[x - 3*synth_width] +
> + 8*synthl[x - 1*synth_width] -
> + synthl[x - 5*synth_width] + 8) >> 4;
> + }
> +
> + /* Vertical synthesis: Lifting stage 1. */
> + synthl = synth;
> + for (x = 0; x < synth_width; x++) {
> + synthl[x] += (synthl[x + synth_width] + synthl[x + synth_width] + 2)
> >> 2;
> + }
> +
> + synthl = synth + (synth_width << 1);
> + for (y = 1; y < height - 1; y++) {
> + for (x = 0; x < synth_width; x++)
> + synthl[x] += (synthl[x - synth_width] + synthl[x + synth_width]
> + 2) >> 2;
> + synthl += synth_width << 1;
> + }
> +
> + synthl = synth + (synth_height - 2) * synth_width;
> + for (x = 0; x < synth_width; x++)
> + synthl[x] += (synthl[x - synth_width] + synthl[x + synth_width] + 2)
> >> 2;
> +
> + deinterleave(data, stride, width, height, synth);
> +}
> +
> +static void vc2_subband_dwt_53(VC2TransformContext *t, dwtcoef *data,
> + ptrdiff_t stride, int width, int height)
> +{
> + int x, y;
> + dwtcoef *synth = t->buffer, *synthl = synth, *datal = data;
> + const ptrdiff_t synth_width = width << 1;
> + const ptrdiff_t synth_height = height << 1;
> +
> + /*
> + * Shift in one bit that is used for additional precision and copy
> + * the data to the buffer.
> + */
> + for (y = 0; y < synth_height; y++) {
> + for (x = 0; x < synth_width; x++)
> + synthl[x] = datal[x] << 1;
> + synthl += synth_width;
> + datal += stride;
> + }
> +
> + /* Horizontal synthesis. */
> + synthl = synth;
> + for (y = 0; y < synth_height; y++) {
> + /* Lifting stage 2. */
> + for (x = 0; x < width - 1; x++)
> + synthl[2 * x + 1] -= (synthl[2 * x] + synthl[2 * x + 2] + 1) >>
> 1;
> +
> + synthl[synth_width - 1] -= (2*synthl[synth_width - 2] + 1) >> 1;
> +
> + /* Lifting stage 1. */
> + synthl[0] += (2*synthl[1] + 2) >> 2;
> + for (x = 1; x < width - 1; x++)
> + synthl[2 * x] += (synthl[2 * x - 1] + synthl[2 * x + 1] + 2) >>
> 2;
> +
> + synthl[synth_width - 2] += (synthl[synth_width - 3] +
> synthl[synth_width - 1] + 2) >> 2;
> +
> + synthl += synth_width;
> + }
> +
> + /* Vertical synthesis: Lifting stage 2. */
> + synthl = synth + synth_width;
> + for (x = 0; x < synth_width; x++)
> + synthl[x] -= (synthl[x - synth_width] + synthl[x + synth_width] + 1)
> >> 1;
> +
> + synthl = synth + (synth_width << 1);
> + for (y = 1; y < height - 1; y++) {
> + for (x = 0; x < synth_width; x++) {
> + synthl[x + synth_width] -= (synthl[x] + synthl[x + synth_width *
> 2] + 1) >> 1;
> + }
> + synthl += (synth_width << 1);
> + }
> +
> + synthl = synth + (synth_height - 1) * synth_width;
> + for (x = 0; x < synth_width; x++)
> + synthl[x] -= (2*synthl[x - synth_width] + 1) >> 1;
> +
> + /* Vertical synthesis: Lifting stage 1. */
> + synthl = synth;
> + for (x = 0; x < synth_width; x++) {
> + synthl[x] += (2*synthl[synth_width + x] + 2) >> 2;
> + }
> +
> + synthl = synth + (synth_width << 1);
> + for (y = 1; y < height - 1; y++) {
> + for (x = 0; x < synth_width; x++) {
> + synthl[x] += (synthl[x + synth_width] + synthl[x - synth_width]
> + 2) >> 2;
> + }
> + synthl += (synth_width << 1);
> + }
> +
> + synthl = synth + (synth_height - 2)*synth_width;
> + for (x = 0; x < synth_width; x++)
> + synthl[x] += (synthl[x - synth_width] + synthl[x + synth_width] + 2)
> >> 2;
> +
> +
> + deinterleave(data, stride, width, height, synth);
> +}
> +
> +av_cold int ff_vc2enc_init_transforms(VC2TransformContext *s, int p_width,
> int p_height)
> +{
> + s->vc2_subband_dwt[VC2_TRANSFORM_9_7] = vc2_subband_dwt_97;
> + s->vc2_subband_dwt[VC2_TRANSFORM_5_3] = vc2_subband_dwt_53;
> +
> + s->buffer = av_malloc(2*p_width*p_height*sizeof(dwtcoef));
> + if (!s->buffer)
> + return 1;
> +
> + return 0;
> +}
> +
> +av_cold void ff_vc2enc_free_transforms(VC2TransformContext *s)
> +{
> + av_freep(&s->buffer);
> +}
> diff --git a/libavcodec/vc2enc_dwt.h b/libavcodec/vc2enc_dwt.h
> new file mode 100644
> index 0000000..e94bb59
> --- /dev/null
> +++ b/libavcodec/vc2enc_dwt.h
> @@ -0,0 +1,54 @@
> +/*
> + * Copyright (C) 2016 Open Broadcast Systems Ltd.
> + * Author (C) 2016 Rostislav Pehlivanov <atomnu...@gmail.com>
> + *
> + * 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
> + */
> +
> +#ifndef AVCODEC_VC2_TRANSFORMS_H
> +#define AVCODEC_VC2_TRANSFORMS_H
> +
> +#include <stdint.h>
> +
> +typedef int16_t dwtcoef;
> +typedef int32_t qcoef; /* Quantization needs more precision */
> +
> +/* Only Deslauriers-Dubuc (9,7) and LeGall (5,3) supported! */
> +
> +enum VC2TransformType {
> + VC2_TRANSFORM_9_7 = 0, /* Deslauriers-Dubuc (9,7) */
> + VC2_TRANSFORM_5_3 = 1, /* LeGall (5,3) */
> + VC2_TRANSFORM_13_7 = 2, /* Deslauriers-Dubuc (13,7) */
> + VC2_TRANSFORM_HAAR = 3, /* Haar without shift */
> + VC2_TRANSFORM_HAAR_S = 4, /* Haar with 1 shift/lvl */
> + VC2_TRANSFORM_FIDEL = 5, /* Fidelity filter */
> + VC2_TRANSFORM_9_7_I = 6, /* Daubechies (9,7) */
> +
> + VC2_TRANSFORMS_NB
> +};
> +
> +typedef struct VC2TransformContext {
> + dwtcoef *buffer;
> + void (*vc2_subband_dwt[VC2_TRANSFORMS_NB])(struct VC2TransformContext *t,
> + dwtcoef *data, ptrdiff_t
> stride,
> + int width, int height);
> +} VC2TransformContext;
> +
> +int ff_vc2enc_init_transforms(VC2TransformContext *t, int p_width, int
> p_height);
> +void ff_vc2enc_free_transforms(VC2TransformContext *t);
> +
> +#endif /* AVCODEC_VC2_TRANSFORMS_H */
> --
> 2.7.0
>
> _______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel@ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
LGTM if copyright stuff fixed.
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