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ffmpeg/libavcodec/ffv1dec.c
Michael Niedermayer 967e5e8f6f
avcodec/ffv1: Support slice coding mode 1 with golomb rice 
Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2024-11-16 13:24:15 +01:00

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/*
* FFV1 decoder
*
* Copyright (c) 2003-2013 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* FF Video Codec 1 (a lossless codec) decoder
*/
#include "libavutil/avassert.h"
#include "libavutil/crc.h"
#include "libavutil/mem.h"
#include "libavutil/imgutils.h"
#include "libavutil/pixdesc.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "get_bits.h"
#include "rangecoder.h"
#include "golomb.h"
#include "mathops.h"
#include "ffv1.h"
#include "progressframe.h"
#include "refstruct.h"
#include "thread.h"
static inline av_flatten int get_symbol_inline(RangeCoder *c, uint8_t *state,
int is_signed)
{
if (get_rac(c, state + 0))
return 0;
else {
int e;
unsigned a;
e = 0;
while (get_rac(c, state + 1 + FFMIN(e, 9))) { // 1..10
e++;
if (e > 31)
return AVERROR_INVALIDDATA;
}
a = 1;
for (int i = e - 1; i >= 0; i--)
a += a + get_rac(c, state + 22 + FFMIN(i, 9)); // 22..31
e = -(is_signed && get_rac(c, state + 11 + FFMIN(e, 10))); // 11..21
return (a ^ e) - e;
}
}
static av_noinline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed)
{
return get_symbol_inline(c, state, is_signed);
}
static inline int get_vlc_symbol(GetBitContext *gb, VlcState *const state,
int bits)
{
int k, i, v, ret;
i = state->count;
k = 0;
while (i < state->error_sum) { // FIXME: optimize
k++;
i += i;
}
v = get_sr_golomb(gb, k, 12, bits);
ff_dlog(NULL, "v:%d bias:%d error:%d drift:%d count:%d k:%d",
v, state->bias, state->error_sum, state->drift, state->count, k);
v ^= ((2 * state->drift + state->count) >> 31);
ret = fold(v + state->bias, bits);
update_vlc_state(state, v);
return ret;
}
static int is_input_end(RangeCoder *c, GetBitContext *gb, int ac)
{
if (ac != AC_GOLOMB_RICE) {
if (c->overread > MAX_OVERREAD)
return AVERROR_INVALIDDATA;
} else {
if (get_bits_left(gb) < 1)
return AVERROR_INVALIDDATA;
}
return 0;
}
#define TYPE int16_t
#define RENAME(name) name
#include "ffv1dec_template.c"
#undef TYPE
#undef RENAME
#define TYPE int32_t
#define RENAME(name) name ## 32
#include "ffv1dec_template.c"
static int decode_plane(FFV1Context *f, FFV1SliceContext *sc,
GetBitContext *gb,
uint8_t *src, int w, int h, int stride, int plane_index,
int pixel_stride, int ac)
{
int x, y;
int16_t *sample[2];
sample[0] = sc->sample_buffer + 3;
sample[1] = sc->sample_buffer + w + 6 + 3;
sc->run_index = 0;
memset(sc->sample_buffer, 0, 2 * (w + 6) * sizeof(*sc->sample_buffer));
for (y = 0; y < h; y++) {
int16_t *temp = sample[0]; // FIXME: try a normal buffer
sample[0] = sample[1];
sample[1] = temp;
sample[1][-1] = sample[0][0];
sample[0][w] = sample[0][w - 1];
if (f->avctx->bits_per_raw_sample <= 8) {
int ret = decode_line(f, sc, gb, w, sample, plane_index, 8, ac);
if (ret < 0)
return ret;
for (x = 0; x < w; x++)
src[x*pixel_stride + stride * y] = sample[1][x];
} else {
int ret = decode_line(f, sc, gb, w, sample, plane_index, f->avctx->bits_per_raw_sample, ac);
if (ret < 0)
return ret;
if (f->packed_at_lsb) {
for (x = 0; x < w; x++) {
((uint16_t*)(src + stride*y))[x*pixel_stride] = sample[1][x];
}
} else {
for (x = 0; x < w; x++) {
((uint16_t*)(src + stride*y))[x*pixel_stride] = sample[1][x] << (16 - f->avctx->bits_per_raw_sample) | ((uint16_t **)sample)[1][x] >> (2 * f->avctx->bits_per_raw_sample - 16);
}
}
}
}
return 0;
}
static int decode_slice_header(const FFV1Context *f,
FFV1SliceContext *sc, AVFrame *frame)
{
RangeCoder *c = &sc->c;
uint8_t state[CONTEXT_SIZE];
unsigned ps, context_count;
int sx, sy, sw, sh;
memset(state, 128, sizeof(state));
sx = get_symbol(c, state, 0);
sy = get_symbol(c, state, 0);
sw = get_symbol(c, state, 0) + 1U;
sh = get_symbol(c, state, 0) + 1U;
av_assert0(f->version > 2);
if (sx < 0 || sy < 0 || sw <= 0 || sh <= 0)
return AVERROR_INVALIDDATA;
if (sx > f->num_h_slices - sw || sy > f->num_v_slices - sh)
return AVERROR_INVALIDDATA;
sc->slice_x = ff_slice_coord(f, f->width , sx , f->num_h_slices, f->chroma_h_shift);
sc->slice_y = ff_slice_coord(f, f->height, sy , f->num_v_slices, f->chroma_v_shift);
sc->slice_width = ff_slice_coord(f, f->width , sx + sw, f->num_h_slices, f->chroma_h_shift) - sc->slice_x;
sc->slice_height = ff_slice_coord(f, f->height, sy + sh, f->num_v_slices, f->chroma_v_shift) - sc->slice_y;
av_assert0((unsigned)sc->slice_width <= f->width &&
(unsigned)sc->slice_height <= f->height);
av_assert0 ( (unsigned)sc->slice_x + (uint64_t)sc->slice_width <= f->width
&& (unsigned)sc->slice_y + (uint64_t)sc->slice_height <= f->height);
if (f->ac == AC_GOLOMB_RICE && sc->slice_width >= (1<<23))
return AVERROR_INVALIDDATA;
for (unsigned i = 0; i < f->plane_count; i++) {
PlaneContext * const p = &sc->plane[i];
int idx = get_symbol(c, state, 0);
if (idx >= (unsigned)f->quant_table_count) {
av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n");
return -1;
}
p->quant_table_index = idx;
context_count = f->context_count[idx];
if (p->context_count < context_count) {
av_freep(&p->state);
av_freep(&p->vlc_state);
}
p->context_count = context_count;
}
ps = get_symbol(c, state, 0);
if (ps == 1) {
frame->flags |= AV_FRAME_FLAG_INTERLACED;
frame->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST;
} else if (ps == 2) {
frame->flags |= AV_FRAME_FLAG_INTERLACED;
frame->flags &= ~AV_FRAME_FLAG_TOP_FIELD_FIRST;
} else if (ps == 3) {
frame->flags &= ~AV_FRAME_FLAG_INTERLACED;
}
frame->sample_aspect_ratio.num = get_symbol(c, state, 0);
frame->sample_aspect_ratio.den = get_symbol(c, state, 0);
if (av_image_check_sar(f->width, f->height,
frame->sample_aspect_ratio) < 0) {
av_log(f->avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
frame->sample_aspect_ratio.num,
frame->sample_aspect_ratio.den);
frame->sample_aspect_ratio = (AVRational){ 0, 1 };
}
if (f->version > 3) {
sc->slice_reset_contexts = get_rac(c, state);
sc->slice_coding_mode = get_symbol(c, state, 0);
if (sc->slice_coding_mode != 1 && f->colorspace == 1) {
sc->slice_rct_by_coef = get_symbol(c, state, 0);
sc->slice_rct_ry_coef = get_symbol(c, state, 0);
if ((uint64_t)sc->slice_rct_by_coef + (uint64_t)sc->slice_rct_ry_coef > 4) {
av_log(f->avctx, AV_LOG_ERROR, "slice_rct_y_coef out of range\n");
return AVERROR_INVALIDDATA;
}
}
}
return 0;
}
static void slice_set_damaged(FFV1Context *f, FFV1SliceContext *sc)
{
sc->slice_damaged = 1;
// only set this for frame threading, as for slice threading its value is
// not used and setting it would be a race
if (f->avctx->active_thread_type & FF_THREAD_FRAME)
f->frame_damaged = 1;
}
static int decode_slice(AVCodecContext *c, void *arg)
{
FFV1Context *f = c->priv_data;
FFV1SliceContext *sc = arg;
int width, height, x, y, ret;
const int ps = av_pix_fmt_desc_get(c->pix_fmt)->comp[0].step;
AVFrame * const p = f->picture.f;
const int si = sc - f->slices;
GetBitContext gb;
int ac = f->ac || sc->slice_coding_mode == 1;
if (!(p->flags & AV_FRAME_FLAG_KEY) && f->last_picture.f)
ff_progress_frame_await(&f->last_picture, si);
if (f->slice_damaged[si])
slice_set_damaged(f, sc);
sc->slice_rct_by_coef = 1;
sc->slice_rct_ry_coef = 1;
if (f->version > 2) {
if (ff_ffv1_init_slice_state(f, sc) < 0)
return AVERROR(ENOMEM);
if (decode_slice_header(f, sc, p) < 0) {
sc->slice_x = sc->slice_y = sc->slice_height = sc->slice_width = 0;
slice_set_damaged(f, sc);
return AVERROR_INVALIDDATA;
}
}
if ((ret = ff_ffv1_init_slice_state(f, sc)) < 0)
return ret;
if ((p->flags & AV_FRAME_FLAG_KEY) || sc->slice_reset_contexts) {
ff_ffv1_clear_slice_state(f, sc);
} else if (sc->slice_damaged) {
return AVERROR_INVALIDDATA;
}
width = sc->slice_width;
height = sc->slice_height;
x = sc->slice_x;
y = sc->slice_y;
if (ac == AC_GOLOMB_RICE) {
if (f->version == 3 && f->micro_version > 1 || f->version > 3)
get_rac(&sc->c, (uint8_t[]) { 129 });
sc->ac_byte_count = f->version > 2 || (!x && !y) ? sc->c.bytestream - sc->c.bytestream_start - 1 : 0;
init_get_bits(&gb,
sc->c.bytestream_start + sc->ac_byte_count,
(sc->c.bytestream_end - sc->c.bytestream_start - sc->ac_byte_count) * 8);
}
av_assert1(width && height);
if (f->colorspace == 0 && (f->chroma_planes || !f->transparency)) {
const int chroma_width = AV_CEIL_RSHIFT(width, f->chroma_h_shift);
const int chroma_height = AV_CEIL_RSHIFT(height, f->chroma_v_shift);
const int cx = x >> f->chroma_h_shift;
const int cy = y >> f->chroma_v_shift;
decode_plane(f, sc, &gb, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0, 1, ac);
if (f->chroma_planes) {
decode_plane(f, sc, &gb, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1, 1, ac);
decode_plane(f, sc, &gb, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1, 1, ac);
}
if (f->transparency)
decode_plane(f, sc, &gb, p->data[3] + ps*x + y*p->linesize[3], width, height, p->linesize[3], (f->version >= 4 && !f->chroma_planes) ? 1 : 2, 1, ac);
} else if (f->colorspace == 0) {
decode_plane(f, sc, &gb, p->data[0] + ps*x + y*p->linesize[0] , width, height, p->linesize[0], 0, 2, ac);
decode_plane(f, sc, &gb, p->data[0] + ps*x + y*p->linesize[0] + 1, width, height, p->linesize[0], 1, 2, ac);
} else if (f->use32bit) {
uint8_t *planes[4] = { p->data[0] + ps * x + y * p->linesize[0],
p->data[1] + ps * x + y * p->linesize[1],
p->data[2] + ps * x + y * p->linesize[2],
p->data[3] + ps * x + y * p->linesize[3] };
decode_rgb_frame32(f, sc, &gb, planes, width, height, p->linesize);
} else {
uint8_t *planes[4] = { p->data[0] + ps * x + y * p->linesize[0],
p->data[1] + ps * x + y * p->linesize[1],
p->data[2] + ps * x + y * p->linesize[2],
p->data[3] + ps * x + y * p->linesize[3] };
decode_rgb_frame(f, sc, &gb, planes, width, height, p->linesize);
}
if (ac != AC_GOLOMB_RICE && f->version > 2) {
int v;
get_rac(&sc->c, (uint8_t[]) { 129 });
v = sc->c.bytestream_end - sc->c.bytestream - 2 - 5*!!f->ec;
if (v) {
av_log(f->avctx, AV_LOG_ERROR, "bytestream end mismatching by %d\n", v);
slice_set_damaged(f, sc);
}
}
if (sc->slice_damaged && (f->avctx->err_recognition & AV_EF_EXPLODE))
return AVERROR_INVALIDDATA;
if ((c->active_thread_type & FF_THREAD_FRAME) && !f->frame_damaged)
ff_progress_frame_report(&f->picture, si);
return 0;
}
static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale)
{
int v;
int i = 0;
uint8_t state[CONTEXT_SIZE];
memset(state, 128, sizeof(state));
for (v = 0; i < 128; v++) {
unsigned len = get_symbol(c, state, 0) + 1U;
if (len > 128 - i || !len)
return AVERROR_INVALIDDATA;
while (len--) {
quant_table[i] = scale * v;
i++;
}
}
for (i = 1; i < 128; i++)
quant_table[256 - i] = -quant_table[i];
quant_table[128] = -quant_table[127];
return 2 * v - 1;
}
static int read_quant_tables(RangeCoder *c,
int16_t quant_table[MAX_CONTEXT_INPUTS][256])
{
int i;
int context_count = 1;
for (i = 0; i < 5; i++) {
int ret = read_quant_table(c, quant_table[i], context_count);
if (ret < 0)
return ret;
context_count *= ret;
if (context_count > 32768U) {
return AVERROR_INVALIDDATA;
}
}
return (context_count + 1) / 2;
}
static int read_extra_header(FFV1Context *f)
{
RangeCoder c;
uint8_t state[CONTEXT_SIZE];
int ret;
uint8_t state2[32][CONTEXT_SIZE];
unsigned crc = 0;
memset(state2, 128, sizeof(state2));
memset(state, 128, sizeof(state));
ff_init_range_decoder(&c, f->avctx->extradata, f->avctx->extradata_size);
ff_build_rac_states(&c, 0.05 * (1LL << 32), 256 - 8);
f->version = get_symbol(&c, state, 0);
if (f->version < 2) {
av_log(f->avctx, AV_LOG_ERROR, "Invalid version in global header\n");
return AVERROR_INVALIDDATA;
}
if (f->version > 4) {
av_log(f->avctx, AV_LOG_ERROR, "unsupported version %d\n",
f->version);
return AVERROR_PATCHWELCOME;
}
if (f->version > 2) {
c.bytestream_end -= 4;
f->micro_version = get_symbol(&c, state, 0);
if (f->micro_version < 0)
return AVERROR_INVALIDDATA;
}
f->ac = get_symbol(&c, state, 0);
if (f->ac == AC_RANGE_CUSTOM_TAB) {
for (int i = 1; i < 256; i++)
f->state_transition[i] = get_symbol(&c, state, 1) + c.one_state[i];
}
f->colorspace = get_symbol(&c, state, 0); //YUV cs type
f->avctx->bits_per_raw_sample = get_symbol(&c, state, 0);
f->chroma_planes = get_rac(&c, state);
f->chroma_h_shift = get_symbol(&c, state, 0);
f->chroma_v_shift = get_symbol(&c, state, 0);
f->transparency = get_rac(&c, state);
f->plane_count = 1 + (f->chroma_planes || f->version<4) + f->transparency;
f->num_h_slices = 1 + get_symbol(&c, state, 0);
f->num_v_slices = 1 + get_symbol(&c, state, 0);
if (f->chroma_h_shift > 4U || f->chroma_v_shift > 4U) {
av_log(f->avctx, AV_LOG_ERROR, "chroma shift parameters %d %d are invalid\n",
f->chroma_h_shift, f->chroma_v_shift);
return AVERROR_INVALIDDATA;
}
if (f->num_h_slices > (unsigned)f->width || !f->num_h_slices ||
f->num_v_slices > (unsigned)f->height || !f->num_v_slices
) {
av_log(f->avctx, AV_LOG_ERROR, "slice count invalid\n");
return AVERROR_INVALIDDATA;
}
if (f->num_h_slices > MAX_SLICES / f->num_v_slices) {
av_log(f->avctx, AV_LOG_ERROR, "slice count unsupported\n");
return AVERROR_PATCHWELCOME;
}
f->quant_table_count = get_symbol(&c, state, 0);
if (f->quant_table_count > (unsigned)MAX_QUANT_TABLES || !f->quant_table_count) {
av_log(f->avctx, AV_LOG_ERROR, "quant table count %d is invalid\n", f->quant_table_count);
f->quant_table_count = 0;
return AVERROR_INVALIDDATA;
}
for (int i = 0; i < f->quant_table_count; i++) {
f->context_count[i] = read_quant_tables(&c, f->quant_tables[i]);
if (f->context_count[i] < 0) {
av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");
return AVERROR_INVALIDDATA;
}
}
if ((ret = ff_ffv1_allocate_initial_states(f)) < 0)
return ret;
for (int i = 0; i < f->quant_table_count; i++)
if (get_rac(&c, state)) {
for (int j = 0; j < f->context_count[i]; j++)
for (int k = 0; k < CONTEXT_SIZE; k++) {
int pred = j ? f->initial_states[i][j - 1][k] : 128;
f->initial_states[i][j][k] =
(pred + get_symbol(&c, state2[k], 1)) & 0xFF;
}
}
if (f->version > 2) {
f->ec = get_symbol(&c, state, 0);
if (f->ec >= 2)
f->crcref = 0x7a8c4079;
if (f->micro_version > 2)
f->intra = get_symbol(&c, state, 0);
}
if (f->version > 2) {
unsigned v;
v = av_crc(av_crc_get_table(AV_CRC_32_IEEE), f->crcref,
f->avctx->extradata, f->avctx->extradata_size);
if (v != f->crcref || f->avctx->extradata_size < 4) {
av_log(f->avctx, AV_LOG_ERROR, "CRC mismatch %X!\n", v);
return AVERROR_INVALIDDATA;
}
crc = AV_RB32(f->avctx->extradata + f->avctx->extradata_size - 4);
}
if (f->avctx->debug & FF_DEBUG_PICT_INFO)
av_log(f->avctx, AV_LOG_DEBUG,
"global: ver:%d.%d, coder:%d, colorspace: %d bpr:%d chroma:%d(%d:%d), alpha:%d slices:%dx%d qtabs:%d ec:%d intra:%d CRC:0x%08X\n",
f->version, f->micro_version,
f->ac,
f->colorspace,
f->avctx->bits_per_raw_sample,
f->chroma_planes, f->chroma_h_shift, f->chroma_v_shift,
f->transparency,
f->num_h_slices, f->num_v_slices,
f->quant_table_count,
f->ec,
f->intra,
crc
);
return 0;
}
static int read_header(FFV1Context *f)
{
uint8_t state[CONTEXT_SIZE];
int context_count = -1; //-1 to avoid warning
RangeCoder *const c = &f->slices[0].c;
memset(state, 128, sizeof(state));
if (f->version < 2) {
int chroma_planes, chroma_h_shift, chroma_v_shift, transparency, colorspace, bits_per_raw_sample;
unsigned v= get_symbol(c, state, 0);
if (v >= 2) {
av_log(f->avctx, AV_LOG_ERROR, "invalid version %d in ver01 header\n", v);
return AVERROR_INVALIDDATA;
}
f->version = v;
f->ac = get_symbol(c, state, 0);
if (f->ac == AC_RANGE_CUSTOM_TAB) {
for (int i = 1; i < 256; i++) {
int st = get_symbol(c, state, 1) + c->one_state[i];
if (st < 1 || st > 255) {
av_log(f->avctx, AV_LOG_ERROR, "invalid state transition %d\n", st);
return AVERROR_INVALIDDATA;
}
f->state_transition[i] = st;
}
}
colorspace = get_symbol(c, state, 0); //YUV cs type
bits_per_raw_sample = f->version > 0 ? get_symbol(c, state, 0) : f->avctx->bits_per_raw_sample;
chroma_planes = get_rac(c, state);
chroma_h_shift = get_symbol(c, state, 0);
chroma_v_shift = get_symbol(c, state, 0);
transparency = get_rac(c, state);
if (colorspace == 0 && f->avctx->skip_alpha)
transparency = 0;
if (f->plane_count) {
if (colorspace != f->colorspace ||
bits_per_raw_sample != f->avctx->bits_per_raw_sample ||
chroma_planes != f->chroma_planes ||
chroma_h_shift != f->chroma_h_shift ||
chroma_v_shift != f->chroma_v_shift ||
transparency != f->transparency) {
av_log(f->avctx, AV_LOG_ERROR, "Invalid change of global parameters\n");
return AVERROR_INVALIDDATA;
}
}
if (chroma_h_shift > 4U || chroma_v_shift > 4U) {
av_log(f->avctx, AV_LOG_ERROR, "chroma shift parameters %d %d are invalid\n",
chroma_h_shift, chroma_v_shift);
return AVERROR_INVALIDDATA;
}
f->colorspace = colorspace;
f->avctx->bits_per_raw_sample = bits_per_raw_sample;
f->chroma_planes = chroma_planes;
f->chroma_h_shift = chroma_h_shift;
f->chroma_v_shift = chroma_v_shift;
f->transparency = transparency;
f->plane_count = 2 + f->transparency;
}
if (f->colorspace == 0) {
if (!f->transparency && !f->chroma_planes) {
if (f->avctx->bits_per_raw_sample <= 8)
f->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
else if (f->avctx->bits_per_raw_sample == 9) {
f->packed_at_lsb = 1;
f->avctx->pix_fmt = AV_PIX_FMT_GRAY9;
} else if (f->avctx->bits_per_raw_sample == 10) {
f->packed_at_lsb = 1;
f->avctx->pix_fmt = AV_PIX_FMT_GRAY10;
} else if (f->avctx->bits_per_raw_sample == 12) {
f->packed_at_lsb = 1;
f->avctx->pix_fmt = AV_PIX_FMT_GRAY12;
} else if (f->avctx->bits_per_raw_sample == 14) {
f->packed_at_lsb = 1;
f->avctx->pix_fmt = AV_PIX_FMT_GRAY14;
} else if (f->avctx->bits_per_raw_sample == 16) {
f->packed_at_lsb = 1;
f->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
} else if (f->avctx->bits_per_raw_sample < 16) {
f->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
} else
return AVERROR(ENOSYS);
} else if (f->transparency && !f->chroma_planes) {
if (f->avctx->bits_per_raw_sample <= 8)
f->avctx->pix_fmt = AV_PIX_FMT_YA8;
else
return AVERROR(ENOSYS);
} else if (f->avctx->bits_per_raw_sample<=8 && !f->transparency) {
switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P; break;
case 0x01: f->avctx->pix_fmt = AV_PIX_FMT_YUV440P; break;
case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P; break;
case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P; break;
case 0x20: f->avctx->pix_fmt = AV_PIX_FMT_YUV411P; break;
case 0x22: f->avctx->pix_fmt = AV_PIX_FMT_YUV410P; break;
}
} else if (f->avctx->bits_per_raw_sample <= 8 && f->transparency) {
switch(16*f->chroma_h_shift + f->chroma_v_shift) {
case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P; break;
case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P; break;
case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P; break;
}
} else if (f->avctx->bits_per_raw_sample == 9 && !f->transparency) {
f->packed_at_lsb = 1;
switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P9; break;
case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P9; break;
case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P9; break;
}
} else if (f->avctx->bits_per_raw_sample == 9 && f->transparency) {
f->packed_at_lsb = 1;
switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P9; break;
case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P9; break;
case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P9; break;
}
} else if (f->avctx->bits_per_raw_sample == 10 && !f->transparency) {
f->packed_at_lsb = 1;
switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P10; break;
case 0x01: f->avctx->pix_fmt = AV_PIX_FMT_YUV440P10; break;
case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P10; break;
case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P10; break;
}
} else if (f->avctx->bits_per_raw_sample == 10 && f->transparency) {
f->packed_at_lsb = 1;
switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P10; break;
case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P10; break;
case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P10; break;
}
} else if (f->avctx->bits_per_raw_sample == 12 && !f->transparency) {
f->packed_at_lsb = 1;
switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P12; break;
case 0x01: f->avctx->pix_fmt = AV_PIX_FMT_YUV440P12; break;
case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P12; break;
case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P12; break;
}
} else if (f->avctx->bits_per_raw_sample == 12 && f->transparency) {
f->packed_at_lsb = 1;
switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P12; break;
case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P12; break;
}
} else if (f->avctx->bits_per_raw_sample == 14 && !f->transparency) {
f->packed_at_lsb = 1;
switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P14; break;
case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P14; break;
case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P14; break;
}
} else if (f->avctx->bits_per_raw_sample == 16 && !f->transparency){
f->packed_at_lsb = 1;
switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P16; break;
case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P16; break;
case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P16; break;
}
} else if (f->avctx->bits_per_raw_sample == 16 && f->transparency){
f->packed_at_lsb = 1;
switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P16; break;
case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P16; break;
case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16; break;
}
}
} else if (f->colorspace == 1) {
if (f->chroma_h_shift || f->chroma_v_shift) {
av_log(f->avctx, AV_LOG_ERROR,
"chroma subsampling not supported in this colorspace\n");
return AVERROR(ENOSYS);
}
if ( f->avctx->bits_per_raw_sample <= 8 && !f->transparency)
f->avctx->pix_fmt = AV_PIX_FMT_0RGB32;
else if (f->avctx->bits_per_raw_sample <= 8 && f->transparency)
f->avctx->pix_fmt = AV_PIX_FMT_RGB32;
else if (f->avctx->bits_per_raw_sample == 9 && !f->transparency)
f->avctx->pix_fmt = AV_PIX_FMT_GBRP9;
else if (f->avctx->bits_per_raw_sample == 10 && !f->transparency)
f->avctx->pix_fmt = AV_PIX_FMT_GBRP10;
else if (f->avctx->bits_per_raw_sample == 10 && f->transparency)
f->avctx->pix_fmt = AV_PIX_FMT_GBRAP10;
else if (f->avctx->bits_per_raw_sample == 12 && !f->transparency)
f->avctx->pix_fmt = AV_PIX_FMT_GBRP12;
else if (f->avctx->bits_per_raw_sample == 12 && f->transparency)
f->avctx->pix_fmt = AV_PIX_FMT_GBRAP12;
else if (f->avctx->bits_per_raw_sample == 14 && !f->transparency)
f->avctx->pix_fmt = AV_PIX_FMT_GBRP14;
else if (f->avctx->bits_per_raw_sample == 14 && f->transparency)
f->avctx->pix_fmt = AV_PIX_FMT_GBRAP14;
else if (f->avctx->bits_per_raw_sample == 16 && !f->transparency) {
f->avctx->pix_fmt = AV_PIX_FMT_GBRP16;
f->use32bit = 1;
}
else if (f->avctx->bits_per_raw_sample == 16 && f->transparency) {
f->avctx->pix_fmt = AV_PIX_FMT_GBRAP16;
f->use32bit = 1;
}
} else {
av_log(f->avctx, AV_LOG_ERROR, "colorspace not supported\n");
return AVERROR(ENOSYS);
}
if (f->avctx->pix_fmt == AV_PIX_FMT_NONE) {
av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");
return AVERROR(ENOSYS);
}
ff_dlog(f->avctx, "%d %d %d\n",
f->chroma_h_shift, f->chroma_v_shift, f->avctx->pix_fmt);
if (f->version < 2) {
context_count = read_quant_tables(c, f->quant_tables[0]);
if (context_count < 0) {
av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");
return AVERROR_INVALIDDATA;
}
f->slice_count = f->max_slice_count;
} else if (f->version < 3) {
f->slice_count = get_symbol(c, state, 0);
} else {
const uint8_t *p = c->bytestream_end;
for (f->slice_count = 0;
f->slice_count < MAX_SLICES && 3 + 5*!!f->ec < p - c->bytestream_start;
f->slice_count++) {
int trailer = 3 + 5*!!f->ec;
int size = AV_RB24(p-trailer);
if (size + trailer > p - c->bytestream_start)
break;
p -= size + trailer;
}
}
if (f->slice_count > (unsigned)MAX_SLICES || f->slice_count <= 0 || f->slice_count > f->max_slice_count) {
av_log(f->avctx, AV_LOG_ERROR, "slice count %d is invalid (max=%d)\n", f->slice_count, f->max_slice_count);
return AVERROR_INVALIDDATA;
}
ff_refstruct_unref(&f->slice_damaged);
f->slice_damaged = ff_refstruct_allocz(f->slice_count * sizeof(*f->slice_damaged));
if (!f->slice_damaged)
return AVERROR(ENOMEM);
for (int j = 0; j < f->slice_count; j++) {
FFV1SliceContext *sc = &f->slices[j];
if (f->version == 2) {
int sx = get_symbol(c, state, 0);
int sy = get_symbol(c, state, 0);
int sw = get_symbol(c, state, 0) + 1U;
int sh = get_symbol(c, state, 0) + 1U;
if (sx < 0 || sy < 0 || sw <= 0 || sh <= 0)
return AVERROR_INVALIDDATA;
if (sx > f->num_h_slices - sw || sy > f->num_v_slices - sh)
return AVERROR_INVALIDDATA;
sc->slice_x = sx * (int64_t)f->width / f->num_h_slices;
sc->slice_y = sy * (int64_t)f->height / f->num_v_slices;
sc->slice_width = (sx + sw) * (int64_t)f->width / f->num_h_slices - sc->slice_x;
sc->slice_height = (sy + sh) * (int64_t)f->height / f->num_v_slices - sc->slice_y;
av_assert0((unsigned)sc->slice_width <= f->width &&
(unsigned)sc->slice_height <= f->height);
av_assert0 ( (unsigned)sc->slice_x + (uint64_t)sc->slice_width <= f->width
&& (unsigned)sc->slice_y + (uint64_t)sc->slice_height <= f->height);
}
ff_refstruct_unref(&sc->plane);
sc->plane = ff_ffv1_planes_alloc();
if (!sc->plane)
return AVERROR(ENOMEM);
for (int i = 0; i < f->plane_count; i++) {
PlaneContext *const p = &sc->plane[i];
if (f->version == 2) {
int idx = get_symbol(c, state, 0);
if (idx >= (unsigned)f->quant_table_count) {
av_log(f->avctx, AV_LOG_ERROR,
"quant_table_index out of range\n");
return AVERROR_INVALIDDATA;
}
p->quant_table_index = idx;
context_count = f->context_count[idx];
}
if (f->version <= 2) {
av_assert0(context_count >= 0);
p->context_count = context_count;
}
}
}
return 0;
}
static av_cold int decode_init(AVCodecContext *avctx)
{
FFV1Context *f = avctx->priv_data;
int ret;
if ((ret = ff_ffv1_common_init(avctx)) < 0)
return ret;
if (avctx->extradata_size > 0 && (ret = read_extra_header(f)) < 0)
return ret;
if ((ret = ff_ffv1_init_slice_contexts(f)) < 0)
return ret;
return 0;
}
static int decode_frame(AVCodecContext *avctx, AVFrame *rframe,
int *got_frame, AVPacket *avpkt)
{
uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
FFV1Context *f = avctx->priv_data;
RangeCoder *const c = &f->slices[0].c;
int ret, key_frame;
uint8_t keystate = 128;
uint8_t *buf_p;
AVFrame *p;
ff_progress_frame_unref(&f->last_picture);
FFSWAP(ProgressFrame, f->picture, f->last_picture);
f->avctx = avctx;
f->frame_damaged = 0;
ff_init_range_decoder(c, buf, buf_size);
ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);
if (get_rac(c, &keystate)) {
key_frame = AV_FRAME_FLAG_KEY;
f->key_frame_ok = 0;
if ((ret = read_header(f)) < 0)
return ret;
f->key_frame_ok = 1;
} else {
if (!f->key_frame_ok) {
av_log(avctx, AV_LOG_ERROR,
"Cannot decode non-keyframe without valid keyframe\n");
return AVERROR_INVALIDDATA;
}
key_frame = 0;
}
if (f->ac != AC_GOLOMB_RICE) {
if (buf_size < avctx->width * avctx->height / (128*8))
return AVERROR_INVALIDDATA;
} else {
int w = avctx->width;
int s = 1 + w / (1<<23);
int i;
w /= s;
for (i = 0; w > (1<<ff_log2_run[i]); i++)
w -= ff_log2_run[i];
if (buf_size < (avctx->height + i + 6) / 8 * s)
return AVERROR_INVALIDDATA;
}
ret = ff_progress_frame_get_buffer(avctx, &f->picture,
AV_GET_BUFFER_FLAG_REF);
if (ret < 0)
return ret;
p = f->picture.f;
p->pict_type = AV_PICTURE_TYPE_I; //FIXME I vs. P
p->flags = (p->flags & ~AV_FRAME_FLAG_KEY) | key_frame;
if (f->version < 3 && avctx->field_order > AV_FIELD_PROGRESSIVE) {
/* we have interlaced material flagged in container */
p->flags |= AV_FRAME_FLAG_INTERLACED;
if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
p->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST;
}
if (avctx->debug & FF_DEBUG_PICT_INFO)
av_log(avctx, AV_LOG_DEBUG, "ver:%d keyframe:%d coder:%d ec:%d slices:%d bps:%d\n",
f->version, !!(p->flags & AV_FRAME_FLAG_KEY), f->ac, f->ec, f->slice_count, f->avctx->bits_per_raw_sample);
ff_thread_finish_setup(avctx);
buf_p = buf + buf_size;
for (int i = f->slice_count - 1; i >= 0; i--) {
FFV1SliceContext *sc = &f->slices[i];
int trailer = 3 + 5*!!f->ec;
int v;
sc->slice_damaged = 0;
if (i || f->version > 2) {
if (trailer > buf_p - buf) v = INT_MAX;
else v = AV_RB24(buf_p-trailer) + trailer;
} else v = buf_p - c->bytestream_start;
if (buf_p - c->bytestream_start < v) {
av_log(avctx, AV_LOG_ERROR, "Slice pointer chain broken\n");
ff_progress_frame_report(&f->picture, INT_MAX);
return AVERROR_INVALIDDATA;
}
buf_p -= v;
if (f->ec) {
unsigned crc = av_crc(av_crc_get_table(AV_CRC_32_IEEE), f->crcref, buf_p, v);
if (crc != f->crcref) {
int64_t ts = avpkt->pts != AV_NOPTS_VALUE ? avpkt->pts : avpkt->dts;
av_log(f->avctx, AV_LOG_ERROR, "slice CRC mismatch %X!", crc);
if (ts != AV_NOPTS_VALUE && avctx->pkt_timebase.num) {
av_log(f->avctx, AV_LOG_ERROR, "at %f seconds\n", ts*av_q2d(avctx->pkt_timebase));
} else if (ts != AV_NOPTS_VALUE) {
av_log(f->avctx, AV_LOG_ERROR, "at %"PRId64"\n", ts);
} else {
av_log(f->avctx, AV_LOG_ERROR, "\n");
}
slice_set_damaged(f, sc);
}
if (avctx->debug & FF_DEBUG_PICT_INFO) {
av_log(avctx, AV_LOG_DEBUG, "slice %d, CRC: 0x%08"PRIX32"\n", i, AV_RB32(buf_p + v - 4));
}
}
if (i) {
ff_init_range_decoder(&sc->c, buf_p, v);
ff_build_rac_states(&sc->c, 0.05 * (1LL << 32), 256 - 8);
} else
sc->c.bytestream_end = buf_p + v;
}
avctx->execute(avctx,
decode_slice,
f->slices,
NULL,
f->slice_count,
sizeof(*f->slices));
for (int i = f->slice_count - 1; i >= 0; i--) {
FFV1SliceContext *sc = &f->slices[i];
if (sc->slice_damaged && f->last_picture.f) {
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
const uint8_t *src[4];
uint8_t *dst[4];
ff_progress_frame_await(&f->last_picture, INT_MAX);
for (int j = 0; j < desc->nb_components; j++) {
int pixshift = desc->comp[j].depth > 8;
int sh = (j == 1 || j == 2) ? f->chroma_h_shift : 0;
int sv = (j == 1 || j == 2) ? f->chroma_v_shift : 0;
dst[j] = p->data[j] + p->linesize[j] *
(sc->slice_y >> sv) + ((sc->slice_x >> sh) << pixshift);
src[j] = f->last_picture.f->data[j] + f->last_picture.f->linesize[j] *
(sc->slice_y >> sv) + ((sc->slice_x >> sh) << pixshift);
}
av_image_copy(dst, p->linesize, src,
f->last_picture.f->linesize,
avctx->pix_fmt,
sc->slice_width,
sc->slice_height);
f->slice_damaged[i] = 1;
}
}
ff_progress_frame_report(&f->picture, INT_MAX);
ff_progress_frame_unref(&f->last_picture);
if ((ret = av_frame_ref(rframe, f->picture.f)) < 0)
return ret;
*got_frame = 1;
return buf_size;
}
#if HAVE_THREADS
static int update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
{
FFV1Context *fsrc = src->priv_data;
FFV1Context *fdst = dst->priv_data;
if (dst == src)
return 0;
fdst->version = fsrc->version;
fdst->micro_version = fsrc->micro_version;
fdst->chroma_planes = fsrc->chroma_planes;
fdst->chroma_h_shift = fsrc->chroma_h_shift;
fdst->chroma_v_shift = fsrc->chroma_v_shift;
fdst->transparency = fsrc->transparency;
fdst->plane_count = fsrc->plane_count;
fdst->ac = fsrc->ac;
fdst->colorspace = fsrc->colorspace;
fdst->ec = fsrc->ec;
fdst->intra = fsrc->intra;
fdst->key_frame_ok = fsrc->key_frame_ok;
fdst->packed_at_lsb = fsrc->packed_at_lsb;
fdst->slice_count = fsrc->slice_count;
fdst->use32bit = fsrc->use32bit;
memcpy(fdst->state_transition, fsrc->state_transition,
sizeof(fdst->state_transition));
// in version 1 there is a single per-keyframe quant table, so
// we need to propagate it between threads
if (fsrc->version < 2)
memcpy(fdst->quant_tables[0], fsrc->quant_tables[0], sizeof(fsrc->quant_tables[0]));
for (int i = 0; i < fdst->num_h_slices * fdst->num_v_slices; i++) {
FFV1SliceContext *sc = &fdst->slices[i];
const FFV1SliceContext *sc0 = &fsrc->slices[i];
ff_refstruct_replace(&sc->plane, sc0->plane);
if (fsrc->version < 3) {
sc->slice_x = sc0->slice_x;
sc->slice_y = sc0->slice_y;
sc->slice_width = sc0->slice_width;
sc->slice_height = sc0->slice_height;
}
}
ff_refstruct_replace(&fdst->slice_damaged, fsrc->slice_damaged);
av_assert1(fdst->max_slice_count == fsrc->max_slice_count);
ff_progress_frame_replace(&fdst->picture, &fsrc->picture);
return 0;
}
#endif
static av_cold int ffv1_decode_close(AVCodecContext *avctx)
{
FFV1Context *const s = avctx->priv_data;
ff_progress_frame_unref(&s->picture);
ff_progress_frame_unref(&s->last_picture);
return ff_ffv1_close(avctx);
}
const FFCodec ff_ffv1_decoder = {
.p.name = "ffv1",
CODEC_LONG_NAME("FFmpeg video codec #1"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_FFV1,
.priv_data_size = sizeof(FFV1Context),
.init = decode_init,
.close = ffv1_decode_close,
FF_CODEC_DECODE_CB(decode_frame),
UPDATE_THREAD_CONTEXT(update_thread_context),
.p.capabilities = AV_CODEC_CAP_DR1 |
AV_CODEC_CAP_FRAME_THREADS | AV_CODEC_CAP_SLICE_THREADS,
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP |
FF_CODEC_CAP_USES_PROGRESSFRAMES,
};
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