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Diffstat (limited to 'lib/ffmpeg/libavcodec/ffv1dec.c')
-rw-r--r--lib/ffmpeg/libavcodec/ffv1dec.c863
1 files changed, 863 insertions, 0 deletions
diff --git a/lib/ffmpeg/libavcodec/ffv1dec.c b/lib/ffmpeg/libavcodec/ffv1dec.c
new file mode 100644
index 0000000000..cb72203468
--- /dev/null
+++ b/lib/ffmpeg/libavcodec/ffv1dec.c
@@ -0,0 +1,863 @@
+/*
+ * FFV1 decoder
+ *
+ * Copyright (c) 2003-2012 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 "libavutil/timer.h"
+#include "avcodec.h"
+#include "internal.h"
+#include "get_bits.h"
+#include "put_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, a;
+ e = 0;
+ while (get_rac(c, state + 1 + FFMIN(e, 9))) // 1..10
+ e++;
+
+ 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);
+ av_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);
+
+#if 0 // JPEG LS
+ if (k == 0 && 2 * state->drift <= -state->count)
+ v ^= (-1);
+#else
+ v ^= ((2 * state->drift + state->count) >> 31);
+#endif
+
+ ret = fold(v + state->bias, bits);
+
+ update_vlc_state(state, v);
+
+ return ret;
+}
+
+static av_always_inline void decode_line(FFV1Context *s, int w,
+ int16_t *sample[2],
+ int plane_index, int bits)
+{
+ PlaneContext *const p = &s->plane[plane_index];
+ RangeCoder *const c = &s->c;
+ int x;
+ int run_count = 0;
+ int run_mode = 0;
+ int run_index = s->run_index;
+
+ for (x = 0; x < w; x++) {
+ int diff, context, sign;
+
+ context = get_context(p, sample[1] + x, sample[0] + x, sample[1] + x);
+ if (context < 0) {
+ context = -context;
+ sign = 1;
+ } else
+ sign = 0;
+
+ av_assert2(context < p->context_count);
+
+ if (s->ac) {
+ diff = get_symbol_inline(c, p->state[context], 1);
+ } else {
+ if (context == 0 && run_mode == 0)
+ run_mode = 1;
+
+ if (run_mode) {
+ if (run_count == 0 && run_mode == 1) {
+ if (get_bits1(&s->gb)) {
+ run_count = 1 << ff_log2_run[run_index];
+ if (x + run_count <= w)
+ run_index++;
+ } else {
+ if (ff_log2_run[run_index])
+ run_count = get_bits(&s->gb, ff_log2_run[run_index]);
+ else
+ run_count = 0;
+ if (run_index)
+ run_index--;
+ run_mode = 2;
+ }
+ }
+ run_count--;
+ if (run_count < 0) {
+ run_mode = 0;
+ run_count = 0;
+ diff = get_vlc_symbol(&s->gb, &p->vlc_state[context],
+ bits);
+ if (diff >= 0)
+ diff++;
+ } else
+ diff = 0;
+ } else
+ diff = get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);
+
+ av_dlog(s->avctx, "count:%d index:%d, mode:%d, x:%d pos:%d\n",
+ run_count, run_index, run_mode, x, get_bits_count(&s->gb));
+ }
+
+ if (sign)
+ diff = -diff;
+
+ sample[1][x] = (predict(sample[1] + x, sample[0] + x) + diff) &
+ ((1 << bits) - 1);
+ }
+ s->run_index = run_index;
+}
+
+static void decode_plane(FFV1Context *s, uint8_t *src,
+ int w, int h, int stride, int plane_index)
+{
+ 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];
+
+// { START_TIMER
+ if (s->avctx->bits_per_raw_sample <= 8) {
+ decode_line(s, w, sample, plane_index, 8);
+ for (x = 0; x < w; x++)
+ src[x + stride * y] = sample[1][x];
+ } else {
+ decode_line(s, w, sample, plane_index, s->avctx->bits_per_raw_sample);
+ if (s->packed_at_lsb) {
+ for (x = 0; x < w; x++) {
+ ((uint16_t*)(src + stride*y))[x] = sample[1][x];
+ }
+ } else {
+ for (x = 0; x < w; x++) {
+ ((uint16_t*)(src + stride*y))[x] = sample[1][x] << (16 - s->avctx->bits_per_raw_sample);
+ }
+ }
+ }
+// STOP_TIMER("decode-line") }
+ }
+}
+
+static void decode_rgb_frame(FFV1Context *s, uint8_t *src[3], int w, int h, int stride[3])
+{
+ int x, y, p;
+ int16_t *sample[4][2];
+ int lbd = s->avctx->bits_per_raw_sample <= 8;
+ int bits = s->avctx->bits_per_raw_sample > 0 ? s->avctx->bits_per_raw_sample : 8;
+ int offset = 1 << bits;
+
+ for (x = 0; x < 4; x++) {
+ sample[x][0] = s->sample_buffer + x * 2 * (w + 6) + 3;
+ sample[x][1] = s->sample_buffer + (x * 2 + 1) * (w + 6) + 3;
+ }
+
+ s->run_index = 0;
+
+ memset(s->sample_buffer, 0, 8 * (w + 6) * sizeof(*s->sample_buffer));
+
+ for (y = 0; y < h; y++) {
+ for (p = 0; p < 3 + s->transparency; p++) {
+ int16_t *temp = sample[p][0]; // FIXME: try a normal buffer
+
+ sample[p][0] = sample[p][1];
+ sample[p][1] = temp;
+
+ sample[p][1][-1]= sample[p][0][0 ];
+ sample[p][0][ w]= sample[p][0][w-1];
+ if (lbd)
+ decode_line(s, w, sample[p], (p + 1)/2, 9);
+ else
+ decode_line(s, w, sample[p], (p + 1)/2, bits + 1);
+ }
+ for (x = 0; x < w; x++) {
+ int g = sample[0][1][x];
+ int b = sample[1][1][x];
+ int r = sample[2][1][x];
+ int a = sample[3][1][x];
+
+ b -= offset;
+ r -= offset;
+ g -= (b + r) >> 2;
+ b += g;
+ r += g;
+
+ if (lbd)
+ *((uint32_t*)(src[0] + x*4 + stride[0]*y)) = b + (g<<8) + (r<<16) + (a<<24);
+ else {
+ *((uint16_t*)(src[0] + x*2 + stride[0]*y)) = b;
+ *((uint16_t*)(src[1] + x*2 + stride[1]*y)) = g;
+ *((uint16_t*)(src[2] + x*2 + stride[2]*y)) = r;
+ }
+ }
+ }
+}
+
+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->picture.interlaced_frame = 1;
+ f->picture.top_field_first = 1;
+ } else if (ps == 2) {
+ f->picture.interlaced_frame = 1;
+ f->picture.top_field_first = 0;
+ } else if (ps == 3) {
+ f->picture.interlaced_frame = 0;
+ }
+ f->picture.sample_aspect_ratio.num = get_symbol(c, state, 0);
+ f->picture.sample_aspect_ratio.den = get_symbol(c, state, 0);
+
+ 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_minus1 + 1;
+ AVFrame * const p = &f->picture;
+
+ if (f->version > 2) {
+ if (ffv1_init_slice_state(f, fs) < 0)
+ return AVERROR(ENOMEM);
+ if (decode_slice_header(f, fs) < 0) {
+ fs->slice_damaged = 1;
+ return AVERROR_INVALIDDATA;
+ }
+ }
+ if ((ret = ffv1_init_slice_state(f, fs)) < 0)
+ return ret;
+ if (f->picture.key_frame)
+ 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) {
+ if (f->version == 3 && f->minor_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) {
+ const int chroma_width = -((-width) >> f->chroma_h_shift);
+ const int chroma_height = -((-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);
+
+ if (f->chroma_planes) {
+ decode_plane(fs, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1);
+ decode_plane(fs, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1);
+ }
+ if (fs->transparency)
+ decode_plane(fs, p->data[3] + ps*x + y*p->linesize[3], width, height, p->linesize[3], 2);
+ } else {
+ uint8_t *planes[3] = { 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] };
+ decode_rgb_frame(fs, planes, width, height, p->linesize);
+ }
+ if (fs->ac && 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();
+
+ 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) + 1;
+
+ if (len > 128 - i)
+ 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++) {
+ context_count *= read_quant_table(c, quant_table[i], context_count);
+ 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];
+
+ 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) {
+ c->bytestream_end -= 4;
+ f->minor_version = get_symbol(c, state, 0);
+ }
+ f->ac = f->avctx->coder_type = get_symbol(c, state, 0);
+ if (f->ac > 1) {
+ 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 = 2 + f->transparency;
+ f->num_h_slices = 1 + get_symbol(c, state, 0);
+ f->num_v_slices = 1 + get_symbol(c, state, 0);
+
+ 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)
+ 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 = 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->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) {
+ av_log(f->avctx, AV_LOG_ERROR, "CRC mismatch %X!\n", v);
+ return AVERROR_INVALIDDATA;
+ }
+ }
+
+ 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) {
+ 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 = f->avctx->coder_type = get_symbol(c, state, 0);
+ if (f->ac > 1) {
+ 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
+
+ if (f->version > 0)
+ 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 = 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
+ f->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
+ } 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;
+ default:
+ av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");
+ 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_YUVA444P; break;
+ case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P; break;
+ case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P; break;
+ default:
+ av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");
+ return AVERROR(ENOSYS);
+ }
+ } else if (f->avctx->bits_per_raw_sample == 9) {
+ 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;
+ default:
+ av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");
+ return AVERROR(ENOSYS);
+ }
+ } else if (f->avctx->bits_per_raw_sample == 10) {
+ 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 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P10; break;
+ case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P10; break;
+ default:
+ av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");
+ return AVERROR(ENOSYS);
+ }
+ } else {
+ 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;
+ default:
+ av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");
+ return AVERROR(ENOSYS);
+ }
+ }
+ } 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 == 9)
+ f->avctx->pix_fmt = AV_PIX_FMT_GBRP9;
+ else if (f->avctx->bits_per_raw_sample == 10)
+ f->avctx->pix_fmt = AV_PIX_FMT_GBRP10;
+ else if (f->avctx->bits_per_raw_sample == 12)
+ f->avctx->pix_fmt = AV_PIX_FMT_GBRP12;
+ else if (f->avctx->bits_per_raw_sample == 14)
+ f->avctx->pix_fmt = AV_PIX_FMT_GBRP14;
+ else
+ if (f->transparency) f->avctx->pix_fmt = AV_PIX_FMT_RGB32;
+ else f->avctx->pix_fmt = AV_PIX_FMT_0RGB32;
+ } else {
+ av_log(f->avctx, AV_LOG_ERROR, "colorspace not supported\n");
+ return AVERROR(ENOSYS);
+ }
+
+ av_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;
+ }
+ } 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 < 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) {
+ av_log(f->avctx, AV_LOG_ERROR, "slice count %d is invalid\n", f->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 = ffv1_common_init(avctx)) < 0)
+ return ret;
+
+ if (avctx->extradata && (ret = read_extra_header(f)) < 0)
+ return ret;
+
+ if ((ret = ffv1_init_slice_contexts(f)) < 0)
+ return ret;
+
+ return 0;
+}
+
+static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
+{
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+ FFV1Context *f = avctx->priv_data;
+ RangeCoder *const c = &f->slice_context[0]->c;
+ AVFrame *const p = &f->picture;
+ int i, ret;
+ uint8_t keystate = 128;
+ const uint8_t *buf_p;
+
+ AVFrame *picture = data;
+
+ /* release previously stored data */
+ if (p->data[0])
+ avctx->release_buffer(avctx, p);
+
+ 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;
+ }
+
+ p->reference = 3; //for error concealment
+ if ((ret = ff_get_buffer(avctx, p)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ 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);
+
+ 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) 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");
+ 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, "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 (i) {
+ ff_init_range_decoder(&fs->c, buf_p, v);
+ } else
+ fs->c.bytestream_end = (uint8_t *)(buf_p + v);
+ }
+
+ 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.data[0]) {
+ const uint8_t *src[4];
+ uint8_t *dst[4];
+ for (j = 0; j < 4; j++) {
+ int sh = (j==1 || j==2) ? f->chroma_h_shift : 0;
+ int sv = (j==1 || j==2) ? f->chroma_v_shift : 0;
+ dst[j] = f->picture .data[j] + f->picture .linesize[j]*
+ (fs->slice_y>>sv) + (fs->slice_x>>sh);
+ src[j] = f->last_picture.data[j] + f->last_picture.linesize[j]*
+ (fs->slice_y>>sv) + (fs->slice_x>>sh);
+ }
+ av_image_copy(dst,
+ f->picture.linesize,
+ (const uint8_t **)src,
+ f->last_picture.linesize,
+ avctx->pix_fmt,
+ fs->slice_width,
+ fs->slice_height);
+ }
+ }
+
+ f->picture_number++;
+
+ *picture = *p;
+ *got_frame = 1;
+
+ FFSWAP(AVFrame, f->picture, f->last_picture);
+
+ return buf_size;
+}
+
+AVCodec ff_ffv1_decoder = {
+ .name = "ffv1",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_FFV1,
+ .priv_data_size = sizeof(FFV1Context),
+ .init = decode_init,
+ .close = ffv1_close,
+ .decode = decode_frame,
+ .capabilities = CODEC_CAP_DR1 /*| CODEC_CAP_DRAW_HORIZ_BAND*/ |
+ CODEC_CAP_SLICE_THREADS,
+ .long_name = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),
+};