* FF Video Codec 1 (a lossless codec)
*/
+#include "libavutil/attributes.h"
#include "libavutil/avassert.h"
#include "avcodec.h"
#include "get_bits.h"
#include "put_bits.h"
-#include "dsputil.h"
#include "rangecoder.h"
#include "golomb.h"
#include "mathops.h"
};
-int ffv1_common_init(AVCodecContext *avctx)
+av_cold int ffv1_common_init(AVCodecContext *avctx)
{
FFV1Context *s = avctx->priv_data;
s->avctx = avctx;
s->flags = avctx->flags;
- ff_dsputil_init(&s->dsp, avctx);
+ if (!avctx->width || !avctx->height)
+ return AVERROR_INVALIDDATA;
s->width = avctx->width;
s->height = avctx->height;
- assert(s->width && s->height);
// defaults
s->num_h_slices = 1;
s->num_v_slices = 1;
return 0;
}
-int ffv1_init_slice_state(FFV1Context *f)
+int ffv1_init_slice_state(FFV1Context *f, FFV1Context *fs)
{
- int i, j;
-
- for (i = 0; i < f->slice_count; i++) {
- FFV1Context *fs = f->slice_context[i];
- for (j = 0; j < f->plane_count; j++) {
- PlaneContext *const p = &fs->plane[j];
-
- if (fs->ac) {
- if (!p->state)
- p->state = av_malloc(CONTEXT_SIZE * p->context_count *
- sizeof(uint8_t));
- if (!p->state)
- return AVERROR(ENOMEM);
- } else {
- if (!p->vlc_state)
- p->vlc_state = av_malloc(p->context_count * sizeof(VlcState));
- if (!p->vlc_state)
- return AVERROR(ENOMEM);
- }
+ int j;
+
+ fs->plane_count = f->plane_count;
+ fs->transparency = f->transparency;
+ for (j = 0; j < f->plane_count; j++) {
+ PlaneContext *const p = &fs->plane[j];
+
+ if (fs->ac) {
+ if (!p->state)
+ p->state = av_malloc(CONTEXT_SIZE * p->context_count *
+ sizeof(uint8_t));
+ if (!p->state)
+ return AVERROR(ENOMEM);
+ } else {
+ if (!p->vlc_state)
+ p->vlc_state = av_malloc(p->context_count * sizeof(VlcState));
+ if (!p->vlc_state)
+ return AVERROR(ENOMEM);
}
+ }
- if (fs->ac > 1) {
- // FIXME: only redo if state_transition changed
- for (j = 1; j < 256; j++) {
- fs->c.one_state[j] = fs->state_transition[j];
- fs->c.zero_state[256 - j] = 256 - fs->c.one_state[j];
- }
+ if (fs->ac > 1) {
+ //FIXME only redo if state_transition changed
+ for (j = 1; j < 256; j++) {
+ fs->c.one_state[j] = f->state_transition[j];
+ fs->c.zero_state[256 - j] = 256 - fs->c.one_state[j];
}
}
int i;
f->slice_count = f->num_h_slices * f->num_v_slices;
+ if (f->slice_count <= 0) {
+ av_log(f->avctx, AV_LOG_ERROR, "Invalid number of slices\n");
+ return AVERROR(EINVAL);
+ }
for (i = 0; i < f->slice_count; i++) {
FFV1Context *fs = av_mallocz(sizeof(*fs));
fs->slice_x = sxs;
fs->slice_y = sys;
- fs->sample_buffer = av_malloc(9 * (fs->width + 6) *
+ fs->sample_buffer = av_malloc(3 * MAX_PLANES * (fs->width + 6) *
sizeof(*fs->sample_buffer));
if (!fs->sample_buffer)
return AVERROR(ENOMEM);
return 0;
}
-void ffv1_clear_state(FFV1Context *f)
+void ffv1_clear_slice_state(FFV1Context *f, FFV1Context *fs)
{
- int i, si, j;
-
- for (si = 0; si < f->slice_count; si++) {
- FFV1Context *fs = f->slice_context[si];
- for (i = 0; i < f->plane_count; i++) {
- PlaneContext *p = &fs->plane[i];
+ int i, j;
- p->interlace_bit_state[0] = 128;
- p->interlace_bit_state[1] = 128;
-
- if (fs->ac) {
- if (f->initial_states[p->quant_table_index]) {
- memcpy(p->state, f->initial_states[p->quant_table_index],
- CONTEXT_SIZE * p->context_count);
- } else
- memset(p->state, 128, CONTEXT_SIZE * p->context_count);
- } else {
- for (j = 0; j < p->context_count; j++) {
- p->vlc_state[j].drift = 0;
- p->vlc_state[j].error_sum = 4; // FFMAX((RANGE + 32)/64, 2);
- p->vlc_state[j].bias = 0;
- p->vlc_state[j].count = 1;
- }
+ for (i = 0; i < f->plane_count; i++) {
+ PlaneContext *p = &fs->plane[i];
+
+ p->interlace_bit_state[0] = 128;
+ p->interlace_bit_state[1] = 128;
+
+ if (fs->ac) {
+ if (f->initial_states[p->quant_table_index]) {
+ memcpy(p->state, f->initial_states[p->quant_table_index],
+ CONTEXT_SIZE * p->context_count);
+ } else
+ memset(p->state, 128, CONTEXT_SIZE * p->context_count);
+ } else {
+ for (j = 0; j < p->context_count; j++) {
+ p->vlc_state[j].drift = 0;
+ p->vlc_state[j].error_sum = 4; //FFMAX((RANGE + 32)/64, 2);
+ p->vlc_state[j].bias = 0;
+ p->vlc_state[j].count = 1;
}
}
}
FFV1Context *s = avctx->priv_data;
int i, j;
- if (avctx->codec->decode && s->picture.data[0])
- avctx->release_buffer(avctx, &s->picture);
-
for (j = 0; j < s->slice_count; j++) {
FFV1Context *fs = s->slice_context[j];
for (i = 0; i < s->plane_count; i++) {