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FFmpeg/libavcodec/svq1enc.c
Andreas Rheinhardt 1cb7fd317c avcodec/svq1enc: Use unsigned for parameter >= 0 to workaround GCC bug 
encode_block() in svq1enc.c looks like the following:

static int encode_block(int block[7][256], int level)
{
    int best_score = 0;

    for (unsigned x = 0; x < level; x++) {
        int v = block[1][x];
        block[level][x] = 0;
        best_score      += v * v;
    }

    if (level > 0 && best_score > 64) {
        int score = 0;

        score += encode_block(block, level - 1);
        score += encode_block(block, level - 1);

        if (score < best_score) {
            best_score = score;
        }
    }

    return best_score;
}

When called from outside of encode_block(), it is always called with
level == 5.

This triggers a bug [1] in GCC: On -O3, it creates eight clones of
encode_block with different values of level inlined into it. The clones
with negative values are of course useless*, but they also lead to
-Warray-bounds warnings, because they access block[-1].

This has been mitigated in GCC 12: It no longer creates clones
for parameters that it knows are impossible. Somehow switching levels
to unsigned makes GCC know this. Therefore this commit does this.
(For GCC 11, this changes the warning to "array subscript 4294967295 is
above array bounds" from "array subscript -1 is below array bounds".)

[1]: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102513

*: These clones can actually be discarded when compiling with
-ffunction-sections.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-07-23 22:53:29 +02:00

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/*
* SVQ1 Encoder
* Copyright (C) 2004 Mike Melanson <melanson@pcisys.net>
*
* 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
* Sorenson Vector Quantizer #1 (SVQ1) video codec.
* For more information of the SVQ1 algorithm, visit:
* http://www.pcisys.net/~melanson/codecs/
*/
#include "avcodec.h"
#include "codec_internal.h"
#include "encode.h"
#include "hpeldsp.h"
#include "me_cmp.h"
#include "mpegvideo.h"
#include "h263.h"
#include "h263enc.h"
#include "internal.h"
#include "mpegutils.h"
#include "packet_internal.h"
#include "svq1.h"
#include "svq1enc.h"
#include "svq1enc_cb.h"
#include "libavutil/avassert.h"
static void svq1_write_header(SVQ1EncContext *s, int frame_type)
{
int i;
/* frame code */
put_bits(&s->pb, 22, 0x20);
/* temporal reference (sure hope this is a "don't care") */
put_bits(&s->pb, 8, 0x00);
/* frame type */
put_bits(&s->pb, 2, frame_type - 1);
if (frame_type == AV_PICTURE_TYPE_I) {
/* no checksum since frame code is 0x20 */
/* no embedded string either */
/* output 5 unknown bits (2 + 2 + 1) */
put_bits(&s->pb, 5, 2); /* 2 needed by quicktime decoder */
i = ff_match_2uint16((void*)ff_svq1_frame_size_table,
FF_ARRAY_ELEMS(ff_svq1_frame_size_table),
s->frame_width, s->frame_height);
put_bits(&s->pb, 3, i);
if (i == 7) {
put_bits(&s->pb, 12, s->frame_width);
put_bits(&s->pb, 12, s->frame_height);
}
}
/* no checksum or extra data (next 2 bits get 0) */
put_bits(&s->pb, 2, 0);
}
#define QUALITY_THRESHOLD 100
#define THRESHOLD_MULTIPLIER 0.6
static int ssd_int8_vs_int16_c(const int8_t *pix1, const int16_t *pix2,
intptr_t size)
{
int score = 0, i;
for (i = 0; i < size; i++)
score += (pix1[i] - pix2[i]) * (pix1[i] - pix2[i]);
return score;
}
static int encode_block(SVQ1EncContext *s, uint8_t *src, uint8_t *ref,
uint8_t *decoded, int stride, unsigned level,
int threshold, int lambda, int intra)
{
int count, y, x, i, j, split, best_mean, best_score, best_count;
int best_vector[6];
int block_sum[7] = { 0, 0, 0, 0, 0, 0 };
int w = 2 << (level + 2 >> 1);
int h = 2 << (level + 1 >> 1);
int size = w * h;
int16_t (*block)[256] = s->encoded_block_levels[level];
const int8_t *codebook_sum, *codebook;
const uint16_t(*mean_vlc)[2];
const uint8_t(*multistage_vlc)[2];
best_score = 0;
// FIXME: Optimize, this does not need to be done multiple times.
if (intra) {
// level is 5 when encode_block is called from svq1_encode_plane
// and always < 4 when called recursively from this function.
codebook_sum = level < 4 ? svq1_intra_codebook_sum[level] : NULL;
codebook = ff_svq1_intra_codebooks[level];
mean_vlc = ff_svq1_intra_mean_vlc;
multistage_vlc = ff_svq1_intra_multistage_vlc[level];
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
int v = src[x + y * stride];
block[0][x + w * y] = v;
best_score += v * v;
block_sum[0] += v;
}
}
} else {
// level is 5 or < 4, see above for details.
codebook_sum = level < 4 ? svq1_inter_codebook_sum[level] : NULL;
codebook = ff_svq1_inter_codebooks[level];
mean_vlc = ff_svq1_inter_mean_vlc + 256;
multistage_vlc = ff_svq1_inter_multistage_vlc[level];
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
int v = src[x + y * stride] - ref[x + y * stride];
block[0][x + w * y] = v;
best_score += v * v;
block_sum[0] += v;
}
}
}
best_count = 0;
best_score -= (int)((unsigned)block_sum[0] * block_sum[0] >> (level + 3));
best_mean = block_sum[0] + (size >> 1) >> (level + 3);
if (level < 4) {
for (count = 1; count < 7; count++) {
int best_vector_score = INT_MAX;
int best_vector_sum = -999, best_vector_mean = -999;
const int stage = count - 1;
const int8_t *vector;
for (i = 0; i < 16; i++) {
int sum = codebook_sum[stage * 16 + i];
int sqr, diff, score;
vector = codebook + stage * size * 16 + i * size;
sqr = s->ssd_int8_vs_int16(vector, block[stage], size);
diff = block_sum[stage] - sum;
score = sqr - (diff * (int64_t)diff >> (level + 3)); // FIXME: 64 bits slooow
if (score < best_vector_score) {
int mean = diff + (size >> 1) >> (level + 3);
av_assert2(mean > -300 && mean < 300);
mean = av_clip(mean, intra ? 0 : -256, 255);
best_vector_score = score;
best_vector[stage] = i;
best_vector_sum = sum;
best_vector_mean = mean;
}
}
av_assert0(best_vector_mean != -999);
vector = codebook + stage * size * 16 + best_vector[stage] * size;
for (j = 0; j < size; j++)
block[stage + 1][j] = block[stage][j] - vector[j];
block_sum[stage + 1] = block_sum[stage] - best_vector_sum;
best_vector_score += lambda *
(+1 + 4 * count +
multistage_vlc[1 + count][1]
+ mean_vlc[best_vector_mean][1]);
if (best_vector_score < best_score) {
best_score = best_vector_score;
best_count = count;
best_mean = best_vector_mean;
}
}
}
split = 0;
if (best_score > threshold && level) {
int score = 0;
int offset = level & 1 ? stride * h / 2 : w / 2;
PutBitContext backup[6];
for (i = level - 1; i >= 0; i--)
backup[i] = s->reorder_pb[i];
score += encode_block(s, src, ref, decoded, stride, level - 1,
threshold >> 1, lambda, intra);
score += encode_block(s, src + offset, ref + offset, decoded + offset,
stride, level - 1, threshold >> 1, lambda, intra);
score += lambda;
if (score < best_score) {
best_score = score;
split = 1;
} else {
for (i = level - 1; i >= 0; i--)
s->reorder_pb[i] = backup[i];
}
}
if (level > 0)
put_bits(&s->reorder_pb[level], 1, split);
if (!split) {
av_assert1(best_mean >= 0 && best_mean < 256 || !intra);
av_assert1(best_mean >= -256 && best_mean < 256);
av_assert1(best_count >= 0 && best_count < 7);
av_assert1(level < 4 || best_count == 0);
/* output the encoding */
put_bits(&s->reorder_pb[level],
multistage_vlc[1 + best_count][1],
multistage_vlc[1 + best_count][0]);
put_bits(&s->reorder_pb[level], mean_vlc[best_mean][1],
mean_vlc[best_mean][0]);
for (i = 0; i < best_count; i++) {
av_assert2(best_vector[i] >= 0 && best_vector[i] < 16);
put_bits(&s->reorder_pb[level], 4, best_vector[i]);
}
for (y = 0; y < h; y++)
for (x = 0; x < w; x++)
decoded[x + y * stride] = src[x + y * stride] -
block[best_count][x + w * y] +
best_mean;
}
return best_score;
}
static void init_block_index(MpegEncContext *s){
s->block_index[0]= s->b8_stride*(s->mb_y*2 ) + s->mb_x*2;
s->block_index[1]= s->b8_stride*(s->mb_y*2 ) + 1 + s->mb_x*2;
s->block_index[2]= s->b8_stride*(s->mb_y*2 + 1) + s->mb_x*2;
s->block_index[3]= s->b8_stride*(s->mb_y*2 + 1) + 1 + s->mb_x*2;
s->block_index[4]= s->mb_stride*(s->mb_y + 1) + s->b8_stride*s->mb_height*2 + s->mb_x;
s->block_index[5]= s->mb_stride*(s->mb_y + s->mb_height + 2) + s->b8_stride*s->mb_height*2 + s->mb_x;
}
static int svq1_encode_plane(SVQ1EncContext *s, int plane,
unsigned char *src_plane,
unsigned char *ref_plane,
unsigned char *decoded_plane,
int width, int height, int src_stride, int stride)
{
int x, y;
int i;
int block_width, block_height;
int level;
int threshold[6];
uint8_t *src = s->scratchbuf + stride * 32;
const int lambda = (s->quality * s->quality) >>
(2 * FF_LAMBDA_SHIFT);
/* figure out the acceptable level thresholds in advance */
threshold[5] = QUALITY_THRESHOLD;
for (level = 4; level >= 0; level--)
threshold[level] = threshold[level + 1] * THRESHOLD_MULTIPLIER;
block_width = (width + 15) / 16;
block_height = (height + 15) / 16;
if (s->pict_type == AV_PICTURE_TYPE_P) {
s->m.avctx = s->avctx;
s->m.current_picture_ptr = &s->m.current_picture;
s->m.last_picture_ptr = &s->m.last_picture;
s->m.last_picture.f->data[0] = ref_plane;
s->m.linesize =
s->m.last_picture.f->linesize[0] =
s->m.new_picture->linesize[0] =
s->m.current_picture.f->linesize[0] = stride;
s->m.width = width;
s->m.height = height;
s->m.mb_width = block_width;
s->m.mb_height = block_height;
s->m.mb_stride = s->m.mb_width + 1;
s->m.b8_stride = 2 * s->m.mb_width + 1;
s->m.f_code = 1;
s->m.pict_type = s->pict_type;
s->m.motion_est = s->motion_est;
s->m.me.scene_change_score = 0;
// s->m.out_format = FMT_H263;
// s->m.unrestricted_mv = 1;
s->m.lambda = s->quality;
s->m.qscale = s->m.lambda * 139 +
FF_LAMBDA_SCALE * 64 >>
FF_LAMBDA_SHIFT + 7;
s->m.lambda2 = s->m.lambda * s->m.lambda +
FF_LAMBDA_SCALE / 2 >>
FF_LAMBDA_SHIFT;
if (!s->motion_val8[plane]) {
s->motion_val8[plane] = av_mallocz((s->m.b8_stride *
block_height * 2 + 2) *
2 * sizeof(int16_t));
s->motion_val16[plane] = av_mallocz((s->m.mb_stride *
(block_height + 2) + 1) *
2 * sizeof(int16_t));
if (!s->motion_val8[plane] || !s->motion_val16[plane])
return AVERROR(ENOMEM);
}
s->m.mb_type = s->mb_type;
// dummies, to avoid segfaults
s->m.current_picture.mb_mean = (uint8_t *)s->dummy;
s->m.current_picture.mb_var = (uint16_t *)s->dummy;
s->m.current_picture.mc_mb_var = (uint16_t *)s->dummy;
s->m.current_picture.mb_type = s->dummy;
s->m.current_picture.motion_val[0] = s->motion_val8[plane] + 2;
s->m.p_mv_table = s->motion_val16[plane] +
s->m.mb_stride + 1;
s->m.mecc = s->mecc; // move
ff_init_me(&s->m);
s->m.me.dia_size = s->avctx->dia_size;
s->m.first_slice_line = 1;
for (y = 0; y < block_height; y++) {
s->m.new_picture->data[0] = src - y * 16 * stride; // ugly
s->m.mb_y = y;
for (i = 0; i < 16 && i + 16 * y < height; i++) {
memcpy(&src[i * stride], &src_plane[(i + 16 * y) * src_stride],
width);
for (x = width; x < 16 * block_width; x++)
src[i * stride + x] = src[i * stride + x - 1];
}
for (; i < 16 && i + 16 * y < 16 * block_height; i++)
memcpy(&src[i * stride], &src[(i - 1) * stride],
16 * block_width);
for (x = 0; x < block_width; x++) {
s->m.mb_x = x;
init_block_index(&s->m);
ff_estimate_p_frame_motion(&s->m, x, y);
}
s->m.first_slice_line = 0;
}
ff_fix_long_p_mvs(&s->m, CANDIDATE_MB_TYPE_INTRA);
ff_fix_long_mvs(&s->m, NULL, 0, s->m.p_mv_table, s->m.f_code,
CANDIDATE_MB_TYPE_INTER, 0);
}
s->m.first_slice_line = 1;
for (y = 0; y < block_height; y++) {
for (i = 0; i < 16 && i + 16 * y < height; i++) {
memcpy(&src[i * stride], &src_plane[(i + 16 * y) * src_stride],
width);
for (x = width; x < 16 * block_width; x++)
src[i * stride + x] = src[i * stride + x - 1];
}
for (; i < 16 && i + 16 * y < 16 * block_height; i++)
memcpy(&src[i * stride], &src[(i - 1) * stride], 16 * block_width);
s->m.mb_y = y;
for (x = 0; x < block_width; x++) {
uint8_t reorder_buffer[2][6][7 * 32];
int count[2][6];
int offset = y * 16 * stride + x * 16;
uint8_t *decoded = decoded_plane + offset;
uint8_t *ref = ref_plane + offset;
int score[4] = { 0, 0, 0, 0 }, best;
uint8_t *temp = s->scratchbuf;
if (put_bytes_left(&s->pb, 0) < 3000) { // FIXME: check size
av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
return -1;
}
s->m.mb_x = x;
init_block_index(&s->m);
if (s->pict_type == AV_PICTURE_TYPE_I ||
(s->m.mb_type[x + y * s->m.mb_stride] &
CANDIDATE_MB_TYPE_INTRA)) {
for (i = 0; i < 6; i++)
init_put_bits(&s->reorder_pb[i], reorder_buffer[0][i],
7 * 32);
if (s->pict_type == AV_PICTURE_TYPE_P) {
const uint8_t *vlc = ff_svq1_block_type_vlc[SVQ1_BLOCK_INTRA];
put_bits(&s->reorder_pb[5], vlc[1], vlc[0]);
score[0] = vlc[1] * lambda;
}
score[0] += encode_block(s, src + 16 * x, NULL, temp, stride,
5, 64, lambda, 1);
for (i = 0; i < 6; i++) {
count[0][i] = put_bits_count(&s->reorder_pb[i]);
flush_put_bits(&s->reorder_pb[i]);
}
} else
score[0] = INT_MAX;
best = 0;
if (s->pict_type == AV_PICTURE_TYPE_P) {
const uint8_t *vlc = ff_svq1_block_type_vlc[SVQ1_BLOCK_INTER];
int mx, my, pred_x, pred_y, dxy;
int16_t *motion_ptr;
motion_ptr = ff_h263_pred_motion(&s->m, 0, 0, &pred_x, &pred_y);
if (s->m.mb_type[x + y * s->m.mb_stride] &
CANDIDATE_MB_TYPE_INTER) {
for (i = 0; i < 6; i++)
init_put_bits(&s->reorder_pb[i], reorder_buffer[1][i],
7 * 32);
put_bits(&s->reorder_pb[5], vlc[1], vlc[0]);
s->m.pb = s->reorder_pb[5];
mx = motion_ptr[0];
my = motion_ptr[1];
av_assert1(mx >= -32 && mx <= 31);
av_assert1(my >= -32 && my <= 31);
av_assert1(pred_x >= -32 && pred_x <= 31);
av_assert1(pred_y >= -32 && pred_y <= 31);
ff_h263_encode_motion(&s->m.pb, mx - pred_x, 1);
ff_h263_encode_motion(&s->m.pb, my - pred_y, 1);
s->reorder_pb[5] = s->m.pb;
score[1] += lambda * put_bits_count(&s->reorder_pb[5]);
dxy = (mx & 1) + 2 * (my & 1);
s->hdsp.put_pixels_tab[0][dxy](temp + 16*stride,
ref + (mx >> 1) +
stride * (my >> 1),
stride, 16);
score[1] += encode_block(s, src + 16 * x, temp + 16*stride,
decoded, stride, 5, 64, lambda, 0);
best = score[1] <= score[0];
vlc = ff_svq1_block_type_vlc[SVQ1_BLOCK_SKIP];
score[2] = s->mecc.sse[0](NULL, src + 16 * x, ref,
stride, 16);
score[2] += vlc[1] * lambda;
if (score[2] < score[best] && mx == 0 && my == 0) {
best = 2;
s->hdsp.put_pixels_tab[0][0](decoded, ref, stride, 16);
put_bits(&s->pb, vlc[1], vlc[0]);
}
}
if (best == 1) {
for (i = 0; i < 6; i++) {
count[1][i] = put_bits_count(&s->reorder_pb[i]);
flush_put_bits(&s->reorder_pb[i]);
}
} else {
motion_ptr[0] =
motion_ptr[1] =
motion_ptr[2] =
motion_ptr[3] =
motion_ptr[0 + 2 * s->m.b8_stride] =
motion_ptr[1 + 2 * s->m.b8_stride] =
motion_ptr[2 + 2 * s->m.b8_stride] =
motion_ptr[3 + 2 * s->m.b8_stride] = 0;
}
}
s->rd_total += score[best];
if (best != 2)
for (i = 5; i >= 0; i--)
ff_copy_bits(&s->pb, reorder_buffer[best][i],
count[best][i]);
if (best == 0)
s->hdsp.put_pixels_tab[0][0](decoded, temp, stride, 16);
}
s->m.first_slice_line = 0;
}
return 0;
}
static av_cold int svq1_encode_end(AVCodecContext *avctx)
{
SVQ1EncContext *const s = avctx->priv_data;
int i;
if (avctx->frame_number)
av_log(avctx, AV_LOG_DEBUG, "RD: %f\n",
s->rd_total / (double)(avctx->width * avctx->height *
avctx->frame_number));
s->m.mb_type = NULL;
ff_mpv_common_end(&s->m);
av_freep(&s->m.me.scratchpad);
av_freep(&s->m.me.map);
av_freep(&s->m.me.score_map);
av_freep(&s->mb_type);
av_freep(&s->dummy);
av_freep(&s->scratchbuf);
for (i = 0; i < 3; i++) {
av_freep(&s->motion_val8[i]);
av_freep(&s->motion_val16[i]);
}
av_frame_free(&s->current_picture);
av_frame_free(&s->last_picture);
return 0;
}
static av_cold int svq1_encode_init(AVCodecContext *avctx)
{
SVQ1EncContext *const s = avctx->priv_data;
int ret;
if (avctx->width >= 4096 || avctx->height >= 4096) {
av_log(avctx, AV_LOG_ERROR, "Dimensions too large, maximum is 4095x4095\n");
return AVERROR(EINVAL);
}
ff_hpeldsp_init(&s->hdsp, avctx->flags);
ff_me_cmp_init(&s->mecc, avctx);
ff_mpegvideoencdsp_init(&s->m.mpvencdsp, avctx);
s->current_picture = av_frame_alloc();
s->last_picture = av_frame_alloc();
if (!s->current_picture || !s->last_picture) {
return AVERROR(ENOMEM);
}
s->frame_width = avctx->width;
s->frame_height = avctx->height;
s->y_block_width = (s->frame_width + 15) / 16;
s->y_block_height = (s->frame_height + 15) / 16;
s->c_block_width = (s->frame_width / 4 + 15) / 16;
s->c_block_height = (s->frame_height / 4 + 15) / 16;
s->avctx = avctx;
s->m.avctx = avctx;
if ((ret = ff_mpv_common_init(&s->m)) < 0) {
return ret;
}
s->m.picture_structure = PICT_FRAME;
s->m.me.temp =
s->m.me.scratchpad = av_mallocz((avctx->width + 64) *
2 * 16 * 2 * sizeof(uint8_t));
s->m.me.map = av_mallocz(ME_MAP_SIZE * sizeof(uint32_t));
s->m.me.score_map = av_mallocz(ME_MAP_SIZE * sizeof(uint32_t));
s->mb_type = av_mallocz((s->y_block_width + 1) *
s->y_block_height * sizeof(int16_t));
s->dummy = av_mallocz((s->y_block_width + 1) *
s->y_block_height * sizeof(int32_t));
s->ssd_int8_vs_int16 = ssd_int8_vs_int16_c;
if (!s->m.me.temp || !s->m.me.scratchpad || !s->m.me.map ||
!s->m.me.score_map || !s->mb_type || !s->dummy) {
return AVERROR(ENOMEM);
}
#if ARCH_PPC
ff_svq1enc_init_ppc(s);
#elif ARCH_X86
ff_svq1enc_init_x86(s);
#endif
ff_h263_encode_init(&s->m); // mv_penalty
return 0;
}
static int svq1_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
const AVFrame *pict, int *got_packet)
{
SVQ1EncContext *const s = avctx->priv_data;
int i, ret;
ret = ff_alloc_packet(avctx, pkt, s->y_block_width * s->y_block_height *
MAX_MB_BYTES * 3 + AV_INPUT_BUFFER_MIN_SIZE);
if (ret < 0)
return ret;
if (avctx->pix_fmt != AV_PIX_FMT_YUV410P) {
av_log(avctx, AV_LOG_ERROR, "unsupported pixel format\n");
return -1;
}
if (!s->current_picture->data[0]) {
if ((ret = ff_encode_alloc_frame(avctx, s->current_picture)) < 0) {
return ret;
}
}
if (!s->last_picture->data[0]) {
ret = ff_encode_alloc_frame(avctx, s->last_picture);
if (ret < 0)
return ret;
}
if (!s->scratchbuf) {
s->scratchbuf = av_malloc_array(s->current_picture->linesize[0], 16 * 3);
if (!s->scratchbuf)
return AVERROR(ENOMEM);
}
FFSWAP(AVFrame*, s->current_picture, s->last_picture);
init_put_bits(&s->pb, pkt->data, pkt->size);
if (avctx->gop_size && (avctx->frame_number % avctx->gop_size))
s->pict_type = AV_PICTURE_TYPE_P;
else
s->pict_type = AV_PICTURE_TYPE_I;
s->quality = pict->quality;
ff_side_data_set_encoder_stats(pkt, pict->quality, NULL, 0, s->pict_type);
svq1_write_header(s, s->pict_type);
for (i = 0; i < 3; i++) {
int ret = svq1_encode_plane(s, i,
pict->data[i],
s->last_picture->data[i],
s->current_picture->data[i],
s->frame_width / (i ? 4 : 1),
s->frame_height / (i ? 4 : 1),
pict->linesize[i],
s->current_picture->linesize[i]);
emms_c();
if (ret < 0) {
int j;
for (j = 0; j < i; j++) {
av_freep(&s->motion_val8[j]);
av_freep(&s->motion_val16[j]);
}
av_freep(&s->scratchbuf);
return -1;
}
}
// align_put_bits(&s->pb);
while (put_bits_count(&s->pb) & 31)
put_bits(&s->pb, 1, 0);
flush_put_bits(&s->pb);
pkt->size = put_bytes_output(&s->pb);
if (s->pict_type == AV_PICTURE_TYPE_I)
pkt->flags |= AV_PKT_FLAG_KEY;
*got_packet = 1;
return 0;
}
#define OFFSET(x) offsetof(struct SVQ1EncContext, x)
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
{ "motion-est", "Motion estimation algorithm", OFFSET(motion_est), AV_OPT_TYPE_INT, { .i64 = FF_ME_EPZS }, FF_ME_ZERO, FF_ME_XONE, VE, "motion-est"},
{ "zero", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FF_ME_ZERO }, 0, 0, FF_MPV_OPT_FLAGS, "motion-est" },
{ "epzs", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FF_ME_EPZS }, 0, 0, FF_MPV_OPT_FLAGS, "motion-est" },
{ "xone", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FF_ME_XONE }, 0, 0, FF_MPV_OPT_FLAGS, "motion-est" },
{ NULL },
};
static const AVClass svq1enc_class = {
.class_name = "svq1enc",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
const FFCodec ff_svq1_encoder = {
.p.name = "svq1",
.p.long_name = NULL_IF_CONFIG_SMALL("Sorenson Vector Quantizer 1 / Sorenson Video 1 / SVQ1"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_SVQ1,
.priv_data_size = sizeof(SVQ1EncContext),
.p.priv_class = &svq1enc_class,
.init = svq1_encode_init,
FF_CODEC_ENCODE_CB(svq1_encode_frame),
.close = svq1_encode_end,
.p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV410P,
AV_PIX_FMT_NONE },
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
};
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