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FFmpeg/libavcodec/ffv1dec.c
Andreas Rheinhardt a247ac640d avcodec: Constify AVCodecs 
Given that the AVCodec.next pointer has now been removed, most of the
AVCodecs are not modified at all any more and can therefore be made
const (as this patch does); the only exceptions are the very few codecs
for external libraries that have a init_static_data callback.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
2021-04-27 10:43:15 -03:00

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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/opt.h"
#include "libavutil/imgutils.h"
#include "libavutil/pixdesc.h"
#include "avcodec.h"
#include "internal.h"
#include "get_bits.h"
#include "rangecoder.h"
#include "golomb.h"
#include "mathops.h"
#include "ffv1.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 i, 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 (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(FFV1Context *s)
{
if (s->ac != AC_GOLOMB_RICE) {
RangeCoder *const c = &s->c;
if (c->overread > MAX_OVERREAD)
return AVERROR_INVALIDDATA;
} else {
if (get_bits_left(&s->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 *s, uint8_t *src,
int w, int h, int stride, int plane_index,
int pixel_stride)
{
int x, y;
int16_t *sample[2];
sample[0] = s->sample_buffer + 3;
sample[1] = s->sample_buffer + w + 6 + 3;
s->run_index = 0;
memset(s->sample_buffer, 0, 2 * (w + 6) * sizeof(*s->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 (s->avctx->bits_per_raw_sample <= 8) {
int ret = decode_line(s, w, sample, plane_index, 8);
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(s, w, sample, plane_index, s->avctx->bits_per_raw_sample);
if (ret < 0)
return ret;
if (s->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 - s->avctx->bits_per_raw_sample) | ((uint16_t **)sample)[1][x] >> (2 * s->avctx->bits_per_raw_sample - 16);
}
}
}
}
return 0;
}
static int decode_slice_header(FFV1Context *f, FFV1Context *fs)
{
RangeCoder *c = &fs->c;
uint8_t state[CONTEXT_SIZE];
unsigned ps, i, context_count;
memset(state, 128, sizeof(state));
av_assert0(f->version > 2);
fs->slice_x = get_symbol(c, state, 0) * f->width ;
fs->slice_y = get_symbol(c, state, 0) * f->height;
fs->slice_width = (get_symbol(c, state, 0) + 1) * f->width + fs->slice_x;
fs->slice_height = (get_symbol(c, state, 0) + 1) * f->height + fs->slice_y;
fs->slice_x /= f->num_h_slices;
fs->slice_y /= f->num_v_slices;
fs->slice_width = fs->slice_width /f->num_h_slices - fs->slice_x;
fs->slice_height = fs->slice_height/f->num_v_slices - fs->slice_y;
if ((unsigned)fs->slice_width > f->width || (unsigned)fs->slice_height > f->height)
return -1;
if ( (unsigned)fs->slice_x + (uint64_t)fs->slice_width > f->width
|| (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)
return -1;
for (i = 0; i < f->plane_count; i++) {
PlaneContext * const p = &fs->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;
memcpy(p->quant_table, f->quant_tables[idx], sizeof(p->quant_table));
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) {
f->cur->interlaced_frame = 1;
f->cur->top_field_first = 1;
} else if (ps == 2) {
f->cur->interlaced_frame = 1;
f->cur->top_field_first = 0;
} else if (ps == 3) {
f->cur->interlaced_frame = 0;
}
f->cur->sample_aspect_ratio.num = get_symbol(c, state, 0);
f->cur->sample_aspect_ratio.den = get_symbol(c, state, 0);
if (av_image_check_sar(f->width, f->height,
f->cur->sample_aspect_ratio) < 0) {
av_log(f->avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
f->cur->sample_aspect_ratio.num,
f->cur->sample_aspect_ratio.den);
f->cur->sample_aspect_ratio = (AVRational){ 0, 1 };
}
if (fs->version > 3) {
fs->slice_reset_contexts = get_rac(c, state);
fs->slice_coding_mode = get_symbol(c, state, 0);
if (fs->slice_coding_mode != 1) {
fs->slice_rct_by_coef = get_symbol(c, state, 0);
fs->slice_rct_ry_coef = get_symbol(c, state, 0);
if ((uint64_t)fs->slice_rct_by_coef + (uint64_t)fs->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 int decode_slice(AVCodecContext *c, void *arg)
{
FFV1Context *fs = *(void **)arg;
FFV1Context *f = fs->avctx->priv_data;
int width, height, x, y, ret;
const int ps = av_pix_fmt_desc_get(c->pix_fmt)->comp[0].step;
AVFrame * const p = f->cur;
int i, si;
for( si=0; fs != f->slice_context[si]; si ++)
;
if(f->fsrc && !p->key_frame)
ff_thread_await_progress(&f->last_picture, si, 0);
if(f->fsrc && !p->key_frame) {
FFV1Context *fssrc = f->fsrc->slice_context[si];
FFV1Context *fsdst = f->slice_context[si];
av_assert1(fsdst->plane_count == fssrc->plane_count);
av_assert1(fsdst == fs);
if (!p->key_frame)
fsdst->slice_damaged |= fssrc->slice_damaged;
for (i = 0; i < f->plane_count; i++) {
PlaneContext *psrc = &fssrc->plane[i];
PlaneContext *pdst = &fsdst->plane[i];
av_free(pdst->state);
av_free(pdst->vlc_state);
memcpy(pdst, psrc, sizeof(*pdst));
pdst->state = NULL;
pdst->vlc_state = NULL;
if (fssrc->ac) {
pdst->state = av_malloc_array(CONTEXT_SIZE, psrc->context_count);
memcpy(pdst->state, psrc->state, CONTEXT_SIZE * psrc->context_count);
} else {
pdst->vlc_state = av_malloc_array(sizeof(*pdst->vlc_state), psrc->context_count);
memcpy(pdst->vlc_state, psrc->vlc_state, sizeof(*pdst->vlc_state) * psrc->context_count);
}
}
}
fs->slice_rct_by_coef = 1;
fs->slice_rct_ry_coef = 1;
if (f->version > 2) {
if (ff_ffv1_init_slice_state(f, fs) < 0)
return AVERROR(ENOMEM);
if (decode_slice_header(f, fs) < 0) {
fs->slice_x = fs->slice_y = fs->slice_height = fs->slice_width = 0;
fs->slice_damaged = 1;
return AVERROR_INVALIDDATA;
}
}
if ((ret = ff_ffv1_init_slice_state(f, fs)) < 0)
return ret;
if (f->cur->key_frame || fs->slice_reset_contexts)
ff_ffv1_clear_slice_state(f, fs);
width = fs->slice_width;
height = fs->slice_height;
x = fs->slice_x;
y = fs->slice_y;
if (fs->ac == AC_GOLOMB_RICE) {
if (f->version == 3 && f->micro_version > 1 || f->version > 3)
get_rac(&fs->c, (uint8_t[]) { 129 });
fs->ac_byte_count = f->version > 2 || (!x && !y) ? fs->c.bytestream - fs->c.bytestream_start - 1 : 0;
init_get_bits(&fs->gb,
fs->c.bytestream_start + fs->ac_byte_count,
(fs->c.bytestream_end - fs->c.bytestream_start - fs->ac_byte_count) * 8);
}
av_assert1(width && height);
if (f->colorspace == 0 && (f->chroma_planes || !fs->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(fs, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0, 1);
if (f->chroma_planes) {
decode_plane(fs, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1, 1);
decode_plane(fs, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1, 1);
}
if (fs->transparency)
decode_plane(fs, p->data[3] + ps*x + y*p->linesize[3], width, height, p->linesize[3], (f->version >= 4 && !f->chroma_planes) ? 1 : 2, 1);
} else if (f->colorspace == 0) {
decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0] , width, height, p->linesize[0], 0, 2);
decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0] + 1, width, height, p->linesize[0], 1, 2);
} 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(fs, 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(fs, planes, width, height, p->linesize);
}
if (fs->ac != AC_GOLOMB_RICE && f->version > 2) {
int v;
get_rac(&fs->c, (uint8_t[]) { 129 });
v = fs->c.bytestream_end - fs->c.bytestream - 2 - 5*f->ec;
if (v) {
av_log(f->avctx, AV_LOG_ERROR, "bytestream end mismatching by %d\n", v);
fs->slice_damaged = 1;
}
}
emms_c();
ff_thread_report_progress(&f->picture, si, 0);
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 *const c = &f->c;
uint8_t state[CONTEXT_SIZE];
int i, j, k, 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 > 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 (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;
}
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 (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 (i = 0; i < f->quant_table_count; i++)
if (get_rac(c, state)) {
for (j = 0; j < f->context_count[i]; j++)
for (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->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), 0,
f->avctx->extradata, f->avctx->extradata_size);
if (v || 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 i, j, context_count = -1; //-1 to avoid warning
RangeCoder *const c = &f->slice_context[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 (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 == 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 == 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 == 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_table);
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;
}
for (j = 0; j < f->slice_count; j++) {
FFV1Context *fs = f->slice_context[j];
fs->ac = f->ac;
fs->packed_at_lsb = f->packed_at_lsb;
fs->slice_damaged = 0;
if (f->version == 2) {
fs->slice_x = get_symbol(c, state, 0) * f->width ;
fs->slice_y = get_symbol(c, state, 0) * f->height;
fs->slice_width = (get_symbol(c, state, 0) + 1) * f->width + fs->slice_x;
fs->slice_height = (get_symbol(c, state, 0) + 1) * f->height + fs->slice_y;
fs->slice_x /= f->num_h_slices;
fs->slice_y /= f->num_v_slices;
fs->slice_width = fs->slice_width / f->num_h_slices - fs->slice_x;
fs->slice_height = fs->slice_height / f->num_v_slices - fs->slice_y;
if ((unsigned)fs->slice_width > f->width ||
(unsigned)fs->slice_height > f->height)
return AVERROR_INVALIDDATA;
if ( (unsigned)fs->slice_x + (uint64_t)fs->slice_width > f->width
|| (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)
return AVERROR_INVALIDDATA;
}
for (i = 0; i < f->plane_count; i++) {
PlaneContext *const p = &fs->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;
memcpy(p->quant_table, f->quant_tables[idx],
sizeof(p->quant_table));
context_count = f->context_count[idx];
} else {
memcpy(p->quant_table, f->quant_table, sizeof(p->quant_table));
}
if (f->version <= 2) {
av_assert0(context_count >= 0);
if (p->context_count < context_count) {
av_freep(&p->state);
av_freep(&p->vlc_state);
}
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, void *data, int *got_frame, AVPacket *avpkt)
{
uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
FFV1Context *f = avctx->priv_data;
RangeCoder *const c = &f->slice_context[0]->c;
int i, ret;
uint8_t keystate = 128;
uint8_t *buf_p;
AVFrame *p;
if (f->last_picture.f)
ff_thread_release_buffer(avctx, &f->last_picture);
FFSWAP(ThreadFrame, f->picture, f->last_picture);
f->cur = p = f->picture.f;
if (f->version < 3 && avctx->field_order > AV_FIELD_PROGRESSIVE) {
/* we have interlaced material flagged in container */
p->interlaced_frame = 1;
if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
p->top_field_first = 1;
}
f->avctx = avctx;
ff_init_range_decoder(c, buf, buf_size);
ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);
p->pict_type = AV_PICTURE_TYPE_I; //FIXME I vs. P
if (get_rac(c, &keystate)) {
p->key_frame = 1;
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;
}
p->key_frame = 0;
}
if ((ret = ff_thread_get_buffer(avctx, &f->picture, AV_GET_BUFFER_FLAG_REF)) < 0)
return ret;
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->key_frame, f->ac, f->ec, f->slice_count, f->avctx->bits_per_raw_sample);
ff_thread_finish_setup(avctx);
buf_p = buf + buf_size;
for (i = f->slice_count - 1; i >= 0; i--) {
FFV1Context *fs = f->slice_context[i];
int trailer = 3 + 5*!!f->ec;
int v;
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_thread_report_progress(&f->picture, INT_MAX, 0);
return AVERROR_INVALIDDATA;
}
buf_p -= v;
if (f->ec) {
unsigned crc = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, buf_p, v);
if (crc) {
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");
}
fs->slice_damaged = 1;
}
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(&fs->c, buf_p, v);
} else
fs->c.bytestream_end = buf_p + v;
fs->avctx = avctx;
fs->cur = p;
}
avctx->execute(avctx,
decode_slice,
&f->slice_context[0],
NULL,
f->slice_count,
sizeof(void*));
for (i = f->slice_count - 1; i >= 0; i--) {
FFV1Context *fs = f->slice_context[i];
int j;
if (fs->slice_damaged && f->last_picture.f->data[0]) {
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
const uint8_t *src[4];
uint8_t *dst[4];
ff_thread_await_progress(&f->last_picture, INT_MAX, 0);
for (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] *
(fs->slice_y >> sv) + ((fs->slice_x >> sh) << pixshift);
src[j] = f->last_picture.f->data[j] + f->last_picture.f->linesize[j] *
(fs->slice_y >> sv) + ((fs->slice_x >> sh) << pixshift);
}
if (desc->flags & AV_PIX_FMT_FLAG_PAL) {
dst[1] = p->data[1];
src[1] = f->last_picture.f->data[1];
}
av_image_copy(dst, p->linesize, src,
f->last_picture.f->linesize,
avctx->pix_fmt,
fs->slice_width,
fs->slice_height);
}
}
ff_thread_report_progress(&f->picture, INT_MAX, 0);
f->picture_number++;
if (f->last_picture.f)
ff_thread_release_buffer(avctx, &f->last_picture);
f->cur = NULL;
if ((ret = av_frame_ref(data, f->picture.f)) < 0)
return ret;
*got_frame = 1;
return buf_size;
}
static void copy_fields(FFV1Context *fsdst, FFV1Context *fssrc, FFV1Context *fsrc)
{
fsdst->version = fsrc->version;
fsdst->micro_version = fsrc->micro_version;
fsdst->chroma_planes = fsrc->chroma_planes;
fsdst->chroma_h_shift = fsrc->chroma_h_shift;
fsdst->chroma_v_shift = fsrc->chroma_v_shift;
fsdst->transparency = fsrc->transparency;
fsdst->plane_count = fsrc->plane_count;
fsdst->ac = fsrc->ac;
fsdst->colorspace = fsrc->colorspace;
fsdst->ec = fsrc->ec;
fsdst->intra = fsrc->intra;
fsdst->slice_damaged = fssrc->slice_damaged;
fsdst->key_frame_ok = fsrc->key_frame_ok;
fsdst->bits_per_raw_sample = fsrc->bits_per_raw_sample;
fsdst->packed_at_lsb = fsrc->packed_at_lsb;
fsdst->slice_count = fsrc->slice_count;
if (fsrc->version<3){
fsdst->slice_x = fssrc->slice_x;
fsdst->slice_y = fssrc->slice_y;
fsdst->slice_width = fssrc->slice_width;
fsdst->slice_height = fssrc->slice_height;
}
}
#if HAVE_THREADS
static int update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
{
FFV1Context *fsrc = src->priv_data;
FFV1Context *fdst = dst->priv_data;
int i, ret;
if (dst == src)
return 0;
{
ThreadFrame picture = fdst->picture, last_picture = fdst->last_picture;
uint8_t (*initial_states[MAX_QUANT_TABLES])[32];
struct FFV1Context *slice_context[MAX_SLICES];
memcpy(initial_states, fdst->initial_states, sizeof(fdst->initial_states));
memcpy(slice_context, fdst->slice_context , sizeof(fdst->slice_context));
memcpy(fdst, fsrc, sizeof(*fdst));
memcpy(fdst->initial_states, initial_states, sizeof(fdst->initial_states));
memcpy(fdst->slice_context, slice_context , sizeof(fdst->slice_context));
fdst->picture = picture;
fdst->last_picture = last_picture;
for (i = 0; i<fdst->num_h_slices * fdst->num_v_slices; i++) {
FFV1Context *fssrc = fsrc->slice_context[i];
FFV1Context *fsdst = fdst->slice_context[i];
copy_fields(fsdst, fssrc, fsrc);
}
av_assert0(!fdst->plane[0].state);
av_assert0(!fdst->sample_buffer);
}
av_assert1(fdst->max_slice_count == fsrc->max_slice_count);
ff_thread_release_buffer(dst, &fdst->picture);
if (fsrc->picture.f->data[0]) {
if ((ret = ff_thread_ref_frame(&fdst->picture, &fsrc->picture)) < 0)
return ret;
}
fdst->fsrc = fsrc;
return 0;
}
#endif
const AVCodec ff_ffv1_decoder = {
.name = "ffv1",
.long_name = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_FFV1,
.priv_data_size = sizeof(FFV1Context),
.init = decode_init,
.close = ff_ffv1_close,
.decode = decode_frame,
.update_thread_context = ONLY_IF_THREADS_ENABLED(update_thread_context),
.capabilities = AV_CODEC_CAP_DR1 /*| AV_CODEC_CAP_DRAW_HORIZ_BAND*/ |
AV_CODEC_CAP_FRAME_THREADS | AV_CODEC_CAP_SLICE_THREADS,
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP | FF_CODEC_CAP_ALLOCATE_PROGRESS,
};
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