static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
ZPContext *s = ctx->priv;
int ret;
outlink->w = s->w;
outlink->h = s->h;
outlink->time_base = av_inv_q(s->framerate);
outlink->frame_rate = s->framerate;
s->desc = av_pix_fmt_desc_get(outlink->format);
ret = av_expr_parse(&s->zoom_expr, s->zoom_expr_str, var_names, NULL, NULL, NULL, NULL, 0, ctx);
if (ret < 0)
return ret;
ret = av_expr_parse(&s->x_expr, s->x_expr_str, var_names, NULL, NULL, NULL, NULL, 0, ctx);
if (ret < 0)
return ret;
ret = av_expr_parse(&s->y_expr, s->y_expr_str, var_names, NULL, NULL, NULL, NULL, 0, ctx);
if (ret < 0)
return ret;
return 0;
}
static av_cold int init(AVFilterContext *ctx)
{
SelectContext *select = ctx->priv;
int i, ret;
if ((ret = av_expr_parse(&select->expr, select->expr_str,
var_names, NULL, NULL, NULL, NULL, 0, ctx)) < 0) {
av_log(ctx, AV_LOG_ERROR, "Error while parsing expression '%s'\n",
select->expr_str);
return ret;
}
select->do_scene_detect = !!strstr(select->expr_str, "scene");
for (i = 0; i < select->nb_outputs; i++) {
AVFilterPad pad = { 0 };
pad.name = av_asprintf("output%d", i);
if (!pad.name)
return AVERROR(ENOMEM);
pad.type = ctx->filter->inputs[0].type;
pad.request_frame = request_frame;
ff_insert_outpad(ctx, i, &pad);
}
return 0;
}
//===========================================================================//
static int vf_open(vf_instance_t *vf, char *args) {
char eq[3][2000] = { { 0 }, { 0 }, { 0 } };
int plane, res;
vf->config=config;
vf->put_image=put_image;
// vf->get_image=get_image;
vf->uninit=uninit;
vf->priv=av_malloc(sizeof(struct vf_priv_s));
memset(vf->priv, 0, sizeof(struct vf_priv_s));
if (args) sscanf(args, "%1999[^:]:%1999[^:]:%1999[^:]", eq[0], eq[1], eq[2]);
if (!eq[1][0]) strncpy(eq[1], eq[0], sizeof(eq[0])-1);
if (!eq[2][0]) strncpy(eq[2], eq[1], sizeof(eq[0])-1);
for(plane=0; plane<3; plane++) {
static const char *const_names[]= {
"PI",
"E",
"X",
"Y",
"W",
"H",
"N",
"SW",
"SH",
NULL
};
static const char *func2_names[]= {
"lum",
"cb",
"cr",
"p",
NULL
};
double (*func2[])(void *, double, double)= {
lum,
cb,
cr,
plane==0 ? lum : (plane==1 ? cb : cr),
NULL
};
res = av_expr_parse(&vf->priv->e[plane], eq[plane], const_names, NULL, NULL, func2_names, func2, 0, NULL);
if (res < 0) {
mp_msg(MSGT_VFILTER, MSGL_ERR, "geq: error loading equation `%s'\n", eq[plane]);
return 0;
}
}
return 1;
}
static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
DrawTextContext *s = ctx->priv;
int ret;
ff_draw_init(&s->dc, inlink->format, FF_DRAW_PROCESS_ALPHA);
ff_draw_color(&s->dc, &s->fontcolor, s->fontcolor.rgba);
ff_draw_color(&s->dc, &s->shadowcolor, s->shadowcolor.rgba);
ff_draw_color(&s->dc, &s->bordercolor, s->bordercolor.rgba);
ff_draw_color(&s->dc, &s->boxcolor, s->boxcolor.rgba);
s->var_values[VAR_w] = s->var_values[VAR_W] = s->var_values[VAR_MAIN_W] = inlink->w;
s->var_values[VAR_h] = s->var_values[VAR_H] = s->var_values[VAR_MAIN_H] = inlink->h;
s->var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ? av_q2d(inlink->sample_aspect_ratio) : 1;
s->var_values[VAR_DAR] = (double)inlink->w / inlink->h * s->var_values[VAR_SAR];
s->var_values[VAR_HSUB] = 1 << s->dc.hsub_max;
s->var_values[VAR_VSUB] = 1 << s->dc.vsub_max;
s->var_values[VAR_X] = NAN;
s->var_values[VAR_Y] = NAN;
s->var_values[VAR_T] = NAN;
av_lfg_init(&s->prng, av_get_random_seed());
av_expr_free(s->x_pexpr);
av_expr_free(s->y_pexpr);
s->x_pexpr = s->y_pexpr = NULL;
if ((ret = av_expr_parse(&s->x_pexpr, s->x_expr, var_names,
NULL, NULL, fun2_names, fun2, 0, ctx)) < 0 ||
(ret = av_expr_parse(&s->y_pexpr, s->y_expr, var_names,
NULL, NULL, fun2_names, fun2, 0, ctx)) < 0 ||
(ret = av_expr_parse(&s->a_pexpr, s->a_expr, var_names,
NULL, NULL, fun2_names, fun2, 0, ctx)) < 0)
return AVERROR(EINVAL);
return 0;
}
static av_cold int init(AVFilterContext *ctx)
{
ShowVolumeContext *s = ctx->priv;
int ret;
if (s->color) {
ret = av_expr_parse(&s->c_expr, s->color, var_names,
NULL, NULL, NULL, NULL, 0, ctx);
if (ret < 0)
return ret;
}
return 0;
}
static av_cold int init(AVFilterContext *ctx, const char *args0)
{
AStreamSyncContext *as = ctx->priv;
const char *expr = args0 ? args0 : default_expr;
int r, i;
r = av_expr_parse(&as->expr, expr, var_names,
NULL, NULL, NULL, NULL, 0, ctx);
if (r < 0) {
av_log(ctx, AV_LOG_ERROR, "Error in expression \"%s\"\n", expr);
return r;
}
for (i = 0; i < 42; i++)
av_expr_eval(as->expr, as->var_values, NULL); /* exercize prng */
return 0;
}
static av_cold int init(AVFilterContext *ctx, const char *args)
{
SetPTSContext *setpts = ctx->priv;
int ret;
if ((ret = av_expr_parse(&setpts->expr, args ? args : "PTS",
var_names, NULL, NULL, NULL, NULL, 0, ctx)) < 0) {
av_log(ctx, AV_LOG_ERROR, "Error while parsing expression '%s'\n", args);
return ret;
}
setpts->var_values[VAR_N ] = 0.0;
setpts->var_values[VAR_PREV_INPTS ] = NAN;
setpts->var_values[VAR_PREV_OUTPTS] = NAN;
setpts->var_values[VAR_STARTPTS ] = NAN;
return 0;
}
static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
{
SelectContext *select = ctx->priv;
int ret;
if ((ret = av_expr_parse(&select->expr, args ? args : "1",
var_names, NULL, NULL, NULL, NULL, 0, ctx)) < 0) {
av_log(ctx, AV_LOG_ERROR, "Error while parsing expression '%s'\n", args);
return ret;
}
select->pending_frames = av_fifo_alloc(FIFO_SIZE*sizeof(AVFilterBufferRef*));
if (!select->pending_frames) {
av_log(ctx, AV_LOG_ERROR, "Failed to allocate pending frames buffer.\n");
return AVERROR(ENOMEM);
}
return 0;
}
static int set_expr(AVExpr **pexpr, const char *expr, void *log_ctx)
{
int ret;
AVExpr *old = NULL;
if (*pexpr)
old = *pexpr;
ret = av_expr_parse(pexpr, expr, var_names,
NULL, NULL, NULL, NULL, 0, log_ctx);
if (ret < 0) {
av_log(log_ctx, AV_LOG_ERROR,
"Error when evaluating the volume expression '%s'\n", expr);
*pexpr = old;
return ret;
}
av_expr_free(old);
return 0;
}
static int set_enable_expr(AVFilterContext *ctx, const char *expr)
{
int ret;
char *expr_dup;
AVExpr *old = ctx->enable;
if (!(ctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE)) {
av_log(ctx, AV_LOG_ERROR, "Timeline ('enable' option) not supported "
"with filter '%s'\n", ctx->filter->name);
return AVERROR_PATCHWELCOME;
}
expr_dup = av_strdup(expr);
if (!expr_dup)
return AVERROR(ENOMEM);
if (!ctx->var_values) {
ctx->var_values = av_calloc(VAR_VARS_NB, sizeof(*ctx->var_values));
if (!ctx->var_values) {
av_free(expr_dup);
return AVERROR(ENOMEM);
}
}
ret = av_expr_parse((AVExpr**)&ctx->enable, expr_dup, var_names,
NULL, NULL, NULL, NULL, 0, ctx->priv);
if (ret < 0) {
av_log(ctx->priv, AV_LOG_ERROR,
"Error when evaluating the expression '%s' for enable\n",
expr_dup);
av_free(expr_dup);
return ret;
}
av_expr_free(old);
av_free(ctx->enable_str);
ctx->enable_str = expr_dup;
return 0;
}
static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
QPContext *s = ctx->priv;
int i;
int ret;
AVExpr *e = NULL;
static const char *var_names[] = { "known", "qp", "x", "y", "w", "h", NULL };
if (!s->qp_expr_str)
return 0;
ret = av_expr_parse(&e, s->qp_expr_str, var_names, NULL, NULL, NULL, NULL, 0, ctx);
if (ret < 0)
return ret;
s->h = (inlink->h + 15) >> 4;
s->qstride = (inlink->w + 15) >> 4;
for (i = -129; i < 128; i++) {
double var_values[] = { i != -129, i, NAN, NAN, s->qstride, s->h, 0};
double temp_val = av_expr_eval(e, var_values, NULL);
if (isnan(temp_val)) {
if(strchr(s->qp_expr_str, 'x') || strchr(s->qp_expr_str, 'y'))
s->evaluate_per_mb = 1;
else {
av_expr_free(e);
return AVERROR(EINVAL);
}
}
s->lut[i + 129] = lrintf(temp_val);
}
av_expr_free(e);
return 0;
}
static av_cold int init(AVFilterContext *ctx)
{
DrawGraphContext *s = ctx->priv;
int ret, i;
if (s->max <= s->min) {
av_log(ctx, AV_LOG_ERROR, "max is same or lower than min\n");
return AVERROR(EINVAL);
}
for (i = 0; i < 4; i++) {
if (s->fg_str[i]) {
ret = av_expr_parse(&s->fg_expr[i], s->fg_str[i], var_names,
NULL, NULL, NULL, NULL, 0, ctx);
if (ret < 0)
return ret;
}
}
s->first = 1;
return 0;
}
static av_cold int init(AVFilterContext *ctx, const char *args)
{
SelectContext *select = ctx->priv;
int ret;
if ((ret = av_expr_parse(&select->expr, args ? args : "1",
var_names, NULL, NULL, NULL, NULL, 0, ctx)) < 0) {
av_log(ctx, AV_LOG_ERROR, "Error while parsing expression '%s'\n", args);
return ret;
}
select->pending_frames = av_fifo_alloc(FIFO_SIZE*sizeof(AVFilterBufferRef*));
if (!select->pending_frames) {
av_log(ctx, AV_LOG_ERROR, "Failed to allocate pending frames buffer.\n");
return AVERROR(ENOMEM);
}
select->do_scene_detect = args && strstr(args, "scene");
if (select->do_scene_detect && !CONFIG_AVCODEC) {
av_log(ctx, AV_LOG_ERROR, "Scene detection is not available without libavcodec.\n");
return AVERROR(EINVAL);
}
return 0;
}
av_cold int ff_rate_control_init(MpegEncContext *s)
{
RateControlContext *rcc = &s->rc_context;
int i, res;
static const char * const const_names[] = {
"PI",
"E",
"iTex",
"pTex",
"tex",
"mv",
"fCode",
"iCount",
"mcVar",
"var",
"isI",
"isP",
"isB",
"avgQP",
"qComp",
#if 0
"lastIQP",
"lastPQP",
"lastBQP",
"nextNonBQP",
#endif
"avgIITex",
"avgPITex",
"avgPPTex",
"avgBPTex",
"avgTex",
NULL
};
static double (* const func1[])(void *, double) = {
(void *)bits2qp,
(void *)qp2bits,
NULL
};
static const char * const func1_names[] = {
"bits2qp",
"qp2bits",
NULL
};
emms_c();
if (!s->avctx->rc_max_available_vbv_use && s->avctx->rc_buffer_size) {
if (s->avctx->rc_max_rate) {
s->avctx->rc_max_available_vbv_use = av_clipf(s->avctx->rc_max_rate/(s->avctx->rc_buffer_size*get_fps(s->avctx)), 1.0/3, 1.0);
} else
s->avctx->rc_max_available_vbv_use = 1.0;
}
res = av_expr_parse(&rcc->rc_eq_eval,
s->avctx->rc_eq ? s->avctx->rc_eq : "tex^qComp",
const_names, func1_names, func1,
NULL, NULL, 0, s->avctx);
if (res < 0) {
av_log(s->avctx, AV_LOG_ERROR, "Error parsing rc_eq \"%s\"\n", s->avctx->rc_eq);
return res;
}
for (i = 0; i < 5; i++) {
rcc->pred[i].coeff = FF_QP2LAMBDA * 7.0;
rcc->pred[i].count = 1.0;
rcc->pred[i].decay = 0.4;
rcc->i_cplx_sum [i] =
rcc->p_cplx_sum [i] =
rcc->mv_bits_sum[i] =
rcc->qscale_sum [i] =
rcc->frame_count[i] = 1; // 1 is better because of 1/0 and such
rcc->last_qscale_for[i] = FF_QP2LAMBDA * 5;
}
rcc->buffer_index = s->avctx->rc_initial_buffer_occupancy;
if (!rcc->buffer_index)
rcc->buffer_index = s->avctx->rc_buffer_size * 3 / 4;
if (s->flags & CODEC_FLAG_PASS2) {
int i;
char *p;
/* find number of pics */
p = s->avctx->stats_in;
for (i = -1; p; i++)
p = strchr(p + 1, ';');
i += s->max_b_frames;
if (i <= 0 || i >= INT_MAX / sizeof(RateControlEntry))
return -1;
rcc->entry = av_mallocz(i * sizeof(RateControlEntry));
rcc->num_entries = i;
/* init all to skipped p frames
* (with b frames we might have a not encoded frame at the end FIXME) */
for (i = 0; i < rcc->num_entries; i++) {
RateControlEntry *rce = &rcc->entry[i];
rce->pict_type = rce->new_pict_type = AV_PICTURE_TYPE_P;
rce->qscale = rce->new_qscale = FF_QP2LAMBDA * 2;
rce->misc_bits = s->mb_num + 10;
rce->mb_var_sum = s->mb_num * 100;
}
/* read stats */
p = s->avctx->stats_in;
for (i = 0; i < rcc->num_entries - s->max_b_frames; i++) {
RateControlEntry *rce;
int picture_number;
int e;
char *next;
next = strchr(p, ';');
if (next) {
(*next) = 0; // sscanf in unbelievably slow on looong strings // FIXME copy / do not write
next++;
}
e = sscanf(p, " in:%d ", &picture_number);
assert(picture_number >= 0);
assert(picture_number < rcc->num_entries);
rce = &rcc->entry[picture_number];
e += sscanf(p, " in:%*d out:%*d type:%d q:%f itex:%d ptex:%d mv:%d misc:%d fcode:%d bcode:%d mc-var:%"SCNd64" var:%"SCNd64" icount:%d skipcount:%d hbits:%d",
&rce->pict_type, &rce->qscale, &rce->i_tex_bits, &rce->p_tex_bits,
&rce->mv_bits, &rce->misc_bits,
&rce->f_code, &rce->b_code,
&rce->mc_mb_var_sum, &rce->mb_var_sum,
&rce->i_count, &rce->skip_count, &rce->header_bits);
if (e != 14) {
av_log(s->avctx, AV_LOG_ERROR,
"statistics are damaged at line %d, parser out=%d\n",
i, e);
return -1;
}
p = next;
}
if (init_pass2(s) < 0)
return -1;
// FIXME maybe move to end
if ((s->flags & CODEC_FLAG_PASS2) && s->avctx->rc_strategy == FF_RC_STRATEGY_XVID) {
#if CONFIG_LIBXVID
return ff_xvid_rate_control_init(s);
#else
av_log(s->avctx, AV_LOG_ERROR,
"Xvid ratecontrol requires libavcodec compiled with Xvid support.\n");
return -1;
#endif
}
}
if (!(s->flags & CODEC_FLAG_PASS2)) {
rcc->short_term_qsum = 0.001;
rcc->short_term_qcount = 0.001;
rcc->pass1_rc_eq_output_sum = 0.001;
rcc->pass1_wanted_bits = 0.001;
if (s->avctx->qblur > 1.0) {
av_log(s->avctx, AV_LOG_ERROR, "qblur too large\n");
return -1;
}
/* init stuff with the user specified complexity */
if (s->avctx->rc_initial_cplx) {
for (i = 0; i < 60 * 30; i++) {
double bits = s->avctx->rc_initial_cplx * (i / 10000.0 + 1.0) * s->mb_num;
RateControlEntry rce;
if (i % ((s->gop_size + 3) / 4) == 0)
rce.pict_type = AV_PICTURE_TYPE_I;
else if (i % (s->max_b_frames + 1))
rce.pict_type = AV_PICTURE_TYPE_B;
else
rce.pict_type = AV_PICTURE_TYPE_P;
rce.new_pict_type = rce.pict_type;
rce.mc_mb_var_sum = bits * s->mb_num / 100000;
rce.mb_var_sum = s->mb_num;
rce.qscale = FF_QP2LAMBDA * 2;
rce.f_code = 2;
rce.b_code = 1;
rce.misc_bits = 1;
if (s->pict_type == AV_PICTURE_TYPE_I) {
rce.i_count = s->mb_num;
rce.i_tex_bits = bits;
rce.p_tex_bits = 0;
rce.mv_bits = 0;
} else {
rce.i_count = 0; // FIXME we do know this approx
rce.i_tex_bits = 0;
rce.p_tex_bits = bits * 0.9;
rce.mv_bits = bits * 0.1;
}
rcc->i_cplx_sum[rce.pict_type] += rce.i_tex_bits * rce.qscale;
rcc->p_cplx_sum[rce.pict_type] += rce.p_tex_bits * rce.qscale;
rcc->mv_bits_sum[rce.pict_type] += rce.mv_bits;
rcc->frame_count[rce.pict_type]++;
get_qscale(s, &rce, rcc->pass1_wanted_bits / rcc->pass1_rc_eq_output_sum, i);
// FIXME misbehaves a little for variable fps
rcc->pass1_wanted_bits += s->bit_rate / get_fps(s->avctx);
}
}
}
return 0;
}
int rotate_filter_frame(RotContext *rot, AVFrame *in,int frame_count_out, AVFrame* &out)
{
int angle_int, s, c, plane;
double res;
rot->var_values[ROTATE_VAR_N] = frame_count_out;
rot->var_values[ROTATE_VAR_T] = 0;//TS2T(in->pts, inlink->time_base);
rot->angle = res = av_expr_eval(rot->angle_expr, rot->var_values, rot);
av_log(NULL, AV_LOG_DEBUG, "n:%f time:%f angle:%f/PI\n",
rot->var_values[ROTATE_VAR_N], rot->var_values[ROTATE_VAR_T], rot->angle/M_PI);
qDebug()<<"rotate_filter_frame n:"<<rot->var_values[ROTATE_VAR_N]
<<" time:"<< rot->var_values[ROTATE_VAR_T] <<" angle(/PI): "<<(rot->angle/M_PI);
angle_int = res * FIXP * 16;
s = int_sin(angle_int);
c = int_sin(angle_int + INT_PI/2);
/* fill background */
if (rot->fillcolor_enable)
ff_fill_rectangle(&rot->draw, &rot->color, out->data, out->linesize,
0, 0, out->width, out->height);
for (plane = 0; plane < rot->nb_planes; plane++) {
int hsub = plane == 1 || plane == 2 ? rot->hsub : 0;
int vsub = plane == 1 || plane == 2 ? rot->vsub : 0;
const int outw = AV_CEIL_RSHIFT(out->width, hsub);
const int outh = AV_CEIL_RSHIFT(out->height, vsub);
#if 0
ThreadData td = { .in = in, .out = out,
.inw = AV_CEIL_RSHIFT(in->width, hsub),
.inh = AV_CEIL_RSHIFT(in->height, vsub),
.outh = outh, .outw = outw,
.xi = -(outw-1) * c / 2, .yi = (outw-1) * s / 2,
.xprime = -(outh-1) * s / 2,
.yprime = -(outh-1) * c / 2,
.plane = plane, .c = c, .s = s };
#endif
ThreadData td;
td.in = in; td.out = out;
td.inw = AV_CEIL_RSHIFT(in->width, hsub);
td.inh = AV_CEIL_RSHIFT(in->height, vsub);
td.outh = outh; td.outw = outw;
td.xi = -(outw-1) * c / 2; td.yi = (outw-1) * s / 2;
td.xprime = -(outh-1) * s / 2;
td.yprime = -(outh-1) * c / 2;
td.plane = plane; td.c = c; td.s = s;
filter_slice(rot, &td, 0, 1);
}
return 0;
}
int rotate_config_props(RotContext *rot, AVFrame *in)
{
const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get((AVPixelFormat)in->format);
int ret;
double res;
char *expr;
qDebug()<<"rotate_config_props foramt: "<<in->format;
ff_draw_init(&rot->draw, (AVPixelFormat)in->format, 0);
ff_draw_color(&rot->draw, &rot->color, rot->fillcolor);
rot->hsub = pixdesc->log2_chroma_w;
rot->vsub = pixdesc->log2_chroma_h;
if (pixdesc->comp[0].depth == 8)
rot->interpolate_bilinear = interpolate_bilinear8;
else
rot->interpolate_bilinear = interpolate_bilinear16;
rot->var_values[ROTATE_VAR_IN_W] = rot->var_values[ROTATE_VAR_IW] = in->width;
rot->var_values[ROTATE_VAR_IN_H] = rot->var_values[ROTATE_VAR_IH] = in->height;
rot->var_values[ROTATE_VAR_HSUB] = 1<<rot->hsub;
rot->var_values[ROTATE_VAR_VSUB] = 1<<rot->vsub;
rot->var_values[ROTATE_VAR_N] = NAN;
rot->var_values[ROTATE_VAR_T] = NAN;
rot->var_values[ROTATE_VAR_OUT_W] = rot->var_values[ROTATE_VAR_OW] = NAN;
rot->var_values[ROTATE_VAR_OUT_H] = rot->var_values[ROTATE_VAR_OH] = NAN;
av_expr_free(rot->angle_expr);
rot->angle_expr = NULL;
if ((ret = av_expr_parse(&rot->angle_expr, expr = rot->angle_expr_str, var_names,
func1_names, func1, NULL, NULL, 0, NULL)) < 0) {
av_log(NULL, AV_LOG_ERROR,
"Error occurred parsing angle expression '%s'\n", rot->angle_expr_str);
return ret;
}
#define SET_SIZE_EXPR(name, opt_name) do { \
ret = av_expr_parse_and_eval(&res, expr = rot->name##_expr_str, \
var_names, rot->var_values, \
func1_names, func1, NULL, NULL, rot, 0, NULL); \
if (ret < 0 || isnan(res) || isinf(res) || res <= 0) { \
av_log(NULL, AV_LOG_ERROR, \
"Error parsing or evaluating expression for option %s: " \
"invalid expression '%s' or non-positive or indefinite value %f\n", \
opt_name, expr, res); \
return ret; \
} \
} while (0)
/* evaluate width and height */
av_expr_parse_and_eval(&res, expr = rot->outw_expr_str, var_names, rot->var_values,
func1_names, func1, NULL, NULL, rot, 0, NULL);
rot->var_values[ROTATE_VAR_OUT_W] = rot->var_values[ROTATE_VAR_OW] = res;
rot->outw = res + 0.5;
SET_SIZE_EXPR(outh, "out_h");
rot->var_values[ROTATE_VAR_OUT_H] = rot->var_values[ROTATE_VAR_OH] = res;
rot->outh = res + 0.5;
/* evaluate the width again, as it may depend on the evaluated output height */
SET_SIZE_EXPR(outw, "out_w");
rot->var_values[ROTATE_VAR_OUT_W] = rot->var_values[ROTATE_VAR_OW] = res;
rot->outw = res + 0.5;
/* compute number of planes */
rot->nb_planes = av_pix_fmt_count_planes((AVPixelFormat)in->format);
////out->width = rot->outw;
////outlink->h = rot->outh;
return 0;
}
static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
DCTdnoizContext *s = ctx->priv;
int i, x, y, bx, by, linesize, *iweights, max_slice_h, slice_h;
const int bsize = 1 << s->n;
switch (inlink->format) {
case AV_PIX_FMT_BGR24:
s->color_decorrelation = color_decorrelation_bgr;
s->color_correlation = color_correlation_bgr;
break;
case AV_PIX_FMT_RGB24:
s->color_decorrelation = color_decorrelation_rgb;
s->color_correlation = color_correlation_rgb;
break;
default:
av_assert0(0);
}
s->pr_width = inlink->w - (inlink->w - bsize) % s->step;
s->pr_height = inlink->h - (inlink->h - bsize) % s->step;
if (s->pr_width != inlink->w)
av_log(ctx, AV_LOG_WARNING, "The last %d horizontal pixels won't be denoised\n",
inlink->w - s->pr_width);
if (s->pr_height != inlink->h)
av_log(ctx, AV_LOG_WARNING, "The last %d vertical pixels won't be denoised\n",
inlink->h - s->pr_height);
max_slice_h = s->pr_height / ((s->bsize - 1) * 2);
s->nb_threads = FFMIN3(MAX_THREADS, ctx->graph->nb_threads, max_slice_h);
av_log(ctx, AV_LOG_DEBUG, "threads: [max=%d hmax=%d user=%d] => %d\n",
MAX_THREADS, max_slice_h, ctx->graph->nb_threads, s->nb_threads);
s->p_linesize = linesize = FFALIGN(s->pr_width, 32);
for (i = 0; i < 2; i++) {
s->cbuf[i][0] = av_malloc(linesize * s->pr_height * sizeof(*s->cbuf[i][0]));
s->cbuf[i][1] = av_malloc(linesize * s->pr_height * sizeof(*s->cbuf[i][1]));
s->cbuf[i][2] = av_malloc(linesize * s->pr_height * sizeof(*s->cbuf[i][2]));
if (!s->cbuf[i][0] || !s->cbuf[i][1] || !s->cbuf[i][2])
return AVERROR(ENOMEM);
}
/* eval expressions are probably not thread safe when the eval internal
* state can be changed (typically through load & store operations) */
if (s->expr_str) {
for (i = 0; i < s->nb_threads; i++) {
int ret = av_expr_parse(&s->expr[i], s->expr_str, var_names,
NULL, NULL, NULL, NULL, 0, ctx);
if (ret < 0)
return ret;
}
}
/* each slice will need to (pre & re)process the top and bottom block of
* the previous one in in addition to its processing area. This is because
* each pixel is averaged by all the surrounding blocks */
slice_h = (int)ceilf(s->pr_height / s->nb_threads) + (s->bsize - 1) * 2;
for (i = 0; i < s->nb_threads; i++) {
s->slices[i] = av_malloc_array(linesize, slice_h * sizeof(*s->slices[i]));
if (!s->slices[i])
return AVERROR(ENOMEM);
}
s->weights = av_malloc(s->pr_height * linesize * sizeof(*s->weights));
if (!s->weights)
return AVERROR(ENOMEM);
iweights = av_calloc(s->pr_height, linesize * sizeof(*iweights));
if (!iweights)
return AVERROR(ENOMEM);
for (y = 0; y < s->pr_height - bsize + 1; y += s->step)
for (x = 0; x < s->pr_width - bsize + 1; x += s->step)
for (by = 0; by < bsize; by++)
for (bx = 0; bx < bsize; bx++)
iweights[(y + by)*linesize + x + bx]++;
for (y = 0; y < s->pr_height; y++)
for (x = 0; x < s->pr_width; x++)
s->weights[y*linesize + x] = 1. / iweights[y*linesize + x];
av_free(iweights);
return 0;
}
static int config_input(AVFilterLink *link)
{
AVFilterContext *ctx = link->dst;
CropContext *crop = ctx->priv;
const AVPixFmtDescriptor *pix_desc = &av_pix_fmt_descriptors[link->format];
int ret;
const char *expr;
double res;
crop->var_values[VAR_IN_W] = crop->var_values[VAR_IW] = ctx->inputs[0]->w;
crop->var_values[VAR_IN_H] = crop->var_values[VAR_IH] = ctx->inputs[0]->h;
crop->var_values[VAR_A] = (float) link->w / link->h;
crop->var_values[VAR_SAR] = link->sample_aspect_ratio.num ? av_q2d(link->sample_aspect_ratio) : 1;
crop->var_values[VAR_DAR] = crop->var_values[VAR_A] * crop->var_values[VAR_SAR];
crop->var_values[VAR_HSUB] = 1<<pix_desc->log2_chroma_w;
crop->var_values[VAR_VSUB] = 1<<pix_desc->log2_chroma_h;
crop->var_values[VAR_X] = NAN;
crop->var_values[VAR_Y] = NAN;
crop->var_values[VAR_OUT_W] = crop->var_values[VAR_OW] = NAN;
crop->var_values[VAR_OUT_H] = crop->var_values[VAR_OH] = NAN;
crop->var_values[VAR_N] = 0;
crop->var_values[VAR_T] = NAN;
crop->var_values[VAR_POS] = NAN;
av_image_fill_max_pixsteps(crop->max_step, NULL, pix_desc);
crop->hsub = av_pix_fmt_descriptors[link->format].log2_chroma_w;
crop->vsub = av_pix_fmt_descriptors[link->format].log2_chroma_h;
if ((ret = av_expr_parse_and_eval(&res, (expr = crop->ow_expr),
var_names, crop->var_values,
NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0) goto fail_expr;
crop->var_values[VAR_OUT_W] = crop->var_values[VAR_OW] = res;
if ((ret = av_expr_parse_and_eval(&res, (expr = crop->oh_expr),
var_names, crop->var_values,
NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0) goto fail_expr;
crop->var_values[VAR_OUT_H] = crop->var_values[VAR_OH] = res;
/* evaluate again ow as it may depend on oh */
if ((ret = av_expr_parse_and_eval(&res, (expr = crop->ow_expr),
var_names, crop->var_values,
NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0) goto fail_expr;
crop->var_values[VAR_OUT_W] = crop->var_values[VAR_OW] = res;
if (normalize_double(&crop->w, crop->var_values[VAR_OUT_W]) < 0 ||
normalize_double(&crop->h, crop->var_values[VAR_OUT_H]) < 0) {
av_log(ctx, AV_LOG_ERROR,
"Too big value or invalid expression for out_w/ow or out_h/oh. "
"Maybe the expression for out_w:'%s' or for out_h:'%s' is self-referencing.\n",
crop->ow_expr, crop->oh_expr);
return AVERROR(EINVAL);
}
crop->w &= ~((1 << crop->hsub) - 1);
crop->h &= ~((1 << crop->vsub) - 1);
if ((ret = av_expr_parse(&crop->x_pexpr, crop->x_expr, var_names,
NULL, NULL, NULL, NULL, 0, ctx)) < 0 ||
(ret = av_expr_parse(&crop->y_pexpr, crop->y_expr, var_names,
NULL, NULL, NULL, NULL, 0, ctx)) < 0)
return AVERROR(EINVAL);
if (crop->keep_aspect) {
AVRational dar = av_mul_q(link->sample_aspect_ratio,
(AVRational){ link->w, link->h });
av_reduce(&crop->out_sar.num, &crop->out_sar.den,
dar.num * crop->h, dar.den * crop->w, INT_MAX);
} else
crop->out_sar = link->sample_aspect_ratio;
av_log(ctx, AV_LOG_INFO, "w:%d h:%d sar:%d/%d -> w:%d h:%d sar:%d/%d\n",
link->w, link->h, link->sample_aspect_ratio.num, link->sample_aspect_ratio.den,
crop->w, crop->h, crop->out_sar.num, crop->out_sar.den);
if (crop->w <= 0 || crop->h <= 0 ||
crop->w > link->w || crop->h > link->h) {
av_log(ctx, AV_LOG_ERROR,
"Invalid too big or non positive size for width '%d' or height '%d'\n",
crop->w, crop->h);
return AVERROR(EINVAL);
}
/* set default, required in the case the first computed value for x/y is NAN */
crop->x = (link->w - crop->w) / 2;
crop->y = (link->h - crop->h) / 2;
crop->x &= ~((1 << crop->hsub) - 1);
crop->y &= ~((1 << crop->vsub) - 1);
return 0;
fail_expr:
av_log(NULL, AV_LOG_ERROR, "Error when evaluating the expression '%s'\n", expr);
return ret;
}
static av_cold int init(AVFilterContext *ctx)
{
MetadataContext *s = ctx->priv;
int ret;
if (!s->key && s->mode != METADATA_PRINT) {
av_log(ctx, AV_LOG_WARNING, "Metadata key must be set\n");
return AVERROR(EINVAL);
}
if ((s->mode == METADATA_MODIFY ||
s->mode == METADATA_ADD) && !s->value) {
av_log(ctx, AV_LOG_WARNING, "Missing metadata value\n");
return AVERROR(EINVAL);
}
switch (s->function) {
case METADATAF_SAME_STR:
s->compare = same_str;
break;
case METADATAF_STARTS_WITH:
s->compare = starts_with;
break;
case METADATAF_LESS:
s->compare = less;
break;
case METADATAF_EQUAL:
s->compare = equal;
break;
case METADATAF_GREATER:
s->compare = greater;
break;
case METADATAF_EXPR:
s->compare = parse_expr;
break;
default:
av_assert0(0);
};
if (s->function == METADATAF_EXPR) {
if (!s->expr_str) {
av_log(ctx, AV_LOG_WARNING, "expr option not set\n");
return AVERROR(EINVAL);
}
if ((ret = av_expr_parse(&s->expr, s->expr_str,
var_names, NULL, NULL, NULL, NULL, 0, ctx)) < 0) {
av_log(ctx, AV_LOG_ERROR, "Error while parsing expression '%s'\n", s->expr_str);
return ret;
}
}
if (s->mode == METADATA_PRINT && s->file_str) {
s->print = print_file;
} else {
s->print = print_log;
}
s->avio_context = NULL;
if (s->file_str) {
if (!strcmp("-", s->file_str)) {
ret = avio_open(&s->avio_context, "pipe:1", AVIO_FLAG_WRITE);
} else {
ret = avio_open(&s->avio_context, s->file_str, AVIO_FLAG_WRITE);
}
if (ret < 0) {
char buf[128];
av_strerror(ret, buf, sizeof(buf));
av_log(ctx, AV_LOG_ERROR, "Could not open %s: %s\n",
s->file_str, buf);
return ret;
}
}
return 0;
}
static int config_input(AVFilterLink *link)
{
AVFilterContext *ctx = link->dst;
CropContext *s = ctx->priv;
const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(link->format);
int ret;
const char *expr;
double res;
s->var_values[VAR_E] = M_E;
s->var_values[VAR_PHI] = M_PHI;
s->var_values[VAR_PI] = M_PI;
s->var_values[VAR_IN_W] = s->var_values[VAR_IW] = ctx->inputs[0]->w;
s->var_values[VAR_IN_H] = s->var_values[VAR_IH] = ctx->inputs[0]->h;
s->var_values[VAR_X] = NAN;
s->var_values[VAR_Y] = NAN;
s->var_values[VAR_OUT_W] = s->var_values[VAR_OW] = NAN;
s->var_values[VAR_OUT_H] = s->var_values[VAR_OH] = NAN;
s->var_values[VAR_N] = 0;
s->var_values[VAR_T] = NAN;
av_image_fill_max_pixsteps(s->max_step, NULL, pix_desc);
s->hsub = pix_desc->log2_chroma_w;
s->vsub = pix_desc->log2_chroma_h;
if ((ret = av_expr_parse_and_eval(&res, (expr = s->ow_expr),
var_names, s->var_values,
NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
goto fail_expr;
s->var_values[VAR_OUT_W] = s->var_values[VAR_OW] = res;
if ((ret = av_expr_parse_and_eval(&res, (expr = s->oh_expr),
var_names, s->var_values,
NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
goto fail_expr;
s->var_values[VAR_OUT_H] = s->var_values[VAR_OH] = res;
/* evaluate again ow as it may depend on oh */
if ((ret = av_expr_parse_and_eval(&res, (expr = s->ow_expr),
var_names, s->var_values,
NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
goto fail_expr;
s->var_values[VAR_OUT_W] = s->var_values[VAR_OW] = res;
if (normalize_double(&s->w, s->var_values[VAR_OUT_W]) < 0 ||
normalize_double(&s->h, s->var_values[VAR_OUT_H]) < 0) {
av_log(ctx, AV_LOG_ERROR,
"Too big value or invalid expression for out_w/ow or out_h/oh. "
"Maybe the expression for out_w:'%s' or for out_h:'%s' is self-referencing.\n",
s->ow_expr, s->oh_expr);
return AVERROR(EINVAL);
}
s->w &= ~((1 << s->hsub) - 1);
s->h &= ~((1 << s->vsub) - 1);
av_expr_free(s->x_pexpr);
av_expr_free(s->y_pexpr);
s->x_pexpr = s->y_pexpr = NULL;
if ((ret = av_expr_parse(&s->x_pexpr, s->x_expr, var_names,
NULL, NULL, NULL, NULL, 0, ctx)) < 0 ||
(ret = av_expr_parse(&s->y_pexpr, s->y_expr, var_names,
NULL, NULL, NULL, NULL, 0, ctx)) < 0)
return AVERROR(EINVAL);
av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d -> w:%d h:%d\n",
link->w, link->h, s->w, s->h);
if (s->w <= 0 || s->h <= 0 ||
s->w > link->w || s->h > link->h) {
av_log(ctx, AV_LOG_ERROR,
"Invalid too big or non positive size for width '%d' or height '%d'\n",
s->w, s->h);
return AVERROR(EINVAL);
}
/* set default, required in the case the first computed value for x/y is NAN */
s->x = (link->w - s->w) / 2;
s->y = (link->h - s->h) / 2;
s->x &= ~((1 << s->hsub) - 1);
s->y &= ~((1 << s->vsub) - 1);
return 0;
fail_expr:
av_log(NULL, AV_LOG_ERROR, "Error when evaluating the expression '%s'\n", expr);
return ret;
}
static int modplug_read_header(AVFormatContext *s)
{
AVStream *st;
AVIOContext *pb = s->pb;
ModPlug_Settings settings;
ModPlugContext *modplug = s->priv_data;
int sz = avio_size(pb);
if (sz < 0) {
av_log(s, AV_LOG_WARNING, "Could not determine file size\n");
sz = modplug->max_size;
} else if (modplug->max_size && sz > modplug->max_size) {
sz = modplug->max_size;
av_log(s, AV_LOG_WARNING, "Max file size reach%s, allocating %dB "
"but demuxing is likely to fail due to incomplete buffer\n",
sz == FF_MODPLUG_DEF_FILE_SIZE ? " (see -max_size)" : "", sz);
}
if (modplug->color_eval) {
int r = av_expr_parse(&modplug->expr, modplug->color_eval, var_names,
NULL, NULL, NULL, NULL, 0, s);
if (r < 0)
return r;
}
modplug->buf = av_malloc(modplug->max_size);
if (!modplug->buf)
return AVERROR(ENOMEM);
sz = avio_read(pb, modplug->buf, sz);
ModPlug_GetSettings(&settings);
settings.mChannels = 2;
settings.mBits = 16;
settings.mFrequency = 44100;
settings.mResamplingMode = MODPLUG_RESAMPLE_FIR; // best quality
settings.mLoopCount = 0; // prevents looping forever
if (modplug->noise_reduction) settings.mFlags |= MODPLUG_ENABLE_NOISE_REDUCTION;
SET_OPT_IF_REQUESTED(mReverbDepth, reverb_depth, MODPLUG_ENABLE_REVERB);
SET_OPT_IF_REQUESTED(mReverbDelay, reverb_delay, MODPLUG_ENABLE_REVERB);
SET_OPT_IF_REQUESTED(mBassAmount, bass_amount, MODPLUG_ENABLE_MEGABASS);
SET_OPT_IF_REQUESTED(mBassRange, bass_range, MODPLUG_ENABLE_MEGABASS);
SET_OPT_IF_REQUESTED(mSurroundDepth, surround_depth, MODPLUG_ENABLE_SURROUND);
SET_OPT_IF_REQUESTED(mSurroundDelay, surround_delay, MODPLUG_ENABLE_SURROUND);
if (modplug->reverb_depth) settings.mReverbDepth = modplug->reverb_depth;
if (modplug->reverb_delay) settings.mReverbDelay = modplug->reverb_delay;
if (modplug->bass_amount) settings.mBassAmount = modplug->bass_amount;
if (modplug->bass_range) settings.mBassRange = modplug->bass_range;
if (modplug->surround_depth) settings.mSurroundDepth = modplug->surround_depth;
if (modplug->surround_delay) settings.mSurroundDelay = modplug->surround_delay;
ModPlug_SetSettings(&settings);
modplug->f = ModPlug_Load(modplug->buf, sz);
if (!modplug->f)
return AVERROR_INVALIDDATA;
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
avpriv_set_pts_info(st, 64, 1, 1000);
st->duration = ModPlug_GetLength(modplug->f);
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->codec_id = AV_CODEC_ID_PCM_S16LE;
st->codec->channels = settings.mChannels;
st->codec->sample_rate = settings.mFrequency;
// timebase = 1/1000, 2ch 16bits 44.1kHz-> 2*2*44100
modplug->ts_per_packet = 1000*AUDIO_PKT_SIZE / (4*44100.);
if (modplug->video_stream) {
AVStream *vst = avformat_new_stream(s, NULL);
if (!vst)
return AVERROR(ENOMEM);
avpriv_set_pts_info(vst, 64, 1, 1000);
vst->duration = st->duration;
vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
vst->codec->codec_id = AV_CODEC_ID_XBIN;
vst->codec->width = modplug->w << 3;
vst->codec->height = modplug->h << 3;
modplug->linesize = modplug->w * 3;
modplug->fsize = modplug->linesize * modplug->h;
}
return modplug_load_metadata(s);
}
static av_cold int geq_init(AVFilterContext *ctx)
{
GEQContext *geq = ctx->priv;
int plane, ret = 0;
if (!geq->expr_str[Y] && !geq->expr_str[G] && !geq->expr_str[B] && !geq->expr_str[R]) {
av_log(ctx, AV_LOG_ERROR, "A luminance or RGB expression is mandatory\n");
ret = AVERROR(EINVAL);
goto end;
}
geq->is_rgb = !geq->expr_str[Y];
if ((geq->expr_str[Y] || geq->expr_str[U] || geq->expr_str[V]) && (geq->expr_str[G] || geq->expr_str[B] || geq->expr_str[R])) {
av_log(ctx, AV_LOG_ERROR, "Either YCbCr or RGB but not both must be specified\n");
ret = AVERROR(EINVAL);
goto end;
}
if (!geq->expr_str[U] && !geq->expr_str[V]) {
/* No chroma at all: fallback on luma */
geq->expr_str[U] = av_strdup(geq->expr_str[Y]);
geq->expr_str[V] = av_strdup(geq->expr_str[Y]);
} else {
/* One chroma unspecified, fallback on the other */
if (!geq->expr_str[U]) geq->expr_str[U] = av_strdup(geq->expr_str[V]);
if (!geq->expr_str[V]) geq->expr_str[V] = av_strdup(geq->expr_str[U]);
}
if (!geq->expr_str[A]) {
char bps_string[8];
snprintf(bps_string, sizeof(bps_string), "%d", (1<<geq->bps) - 1);
geq->expr_str[A] = av_strdup(bps_string);
}
if (!geq->expr_str[G])
geq->expr_str[G] = av_strdup("g(X,Y)");
if (!geq->expr_str[B])
geq->expr_str[B] = av_strdup("b(X,Y)");
if (!geq->expr_str[R])
geq->expr_str[R] = av_strdup("r(X,Y)");
if (geq->is_rgb ?
(!geq->expr_str[G] || !geq->expr_str[B] || !geq->expr_str[R])
:
(!geq->expr_str[U] || !geq->expr_str[V] || !geq->expr_str[A])) {
ret = AVERROR(ENOMEM);
goto end;
}
for (plane = 0; plane < 4; plane++) {
static double (*p[])(void *, double, double) = { lum, cb, cr, alpha };
static const char *const func2_yuv_names[] = { "lum", "cb", "cr", "alpha", "p", NULL };
static const char *const func2_rgb_names[] = { "g", "b", "r", "alpha", "p", NULL };
const char *const *func2_names = geq->is_rgb ? func2_rgb_names : func2_yuv_names;
double (*func2[])(void *, double, double) = { lum, cb, cr, alpha, p[plane], NULL };
ret = av_expr_parse(&geq->e[plane], geq->expr_str[plane < 3 && geq->is_rgb ? plane+4 : plane], var_names,
NULL, NULL, func2_names, func2, 0, ctx);
if (ret < 0)
break;
}
end:
return ret;
}
static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
AFFTFiltContext *s = ctx->priv;
char *saveptr = NULL;
int ret = 0, ch, i;
float overlap;
char *args;
const char *last_expr = "1";
s->fft = av_fft_init(s->fft_bits, 0);
s->ifft = av_fft_init(s->fft_bits, 1);
if (!s->fft || !s->ifft)
return AVERROR(ENOMEM);
s->window_size = 1 << s->fft_bits;
s->fft_data = av_calloc(inlink->channels, sizeof(*s->fft_data));
if (!s->fft_data)
return AVERROR(ENOMEM);
for (ch = 0; ch < inlink->channels; ch++) {
s->fft_data[ch] = av_calloc(s->window_size, sizeof(**s->fft_data));
if (!s->fft_data[ch])
return AVERROR(ENOMEM);
}
s->real = av_calloc(inlink->channels, sizeof(*s->real));
if (!s->real)
return AVERROR(ENOMEM);
s->imag = av_calloc(inlink->channels, sizeof(*s->imag));
if (!s->imag)
return AVERROR(ENOMEM);
args = av_strdup(s->real_str);
if (!args)
return AVERROR(ENOMEM);
for (ch = 0; ch < inlink->channels; ch++) {
char *arg = av_strtok(ch == 0 ? args : NULL, "|", &saveptr);
ret = av_expr_parse(&s->real[ch], arg ? arg : last_expr, var_names,
NULL, NULL, NULL, NULL, 0, ctx);
if (ret < 0)
break;
if (arg)
last_expr = arg;
s->nb_exprs++;
}
av_free(args);
args = av_strdup(s->img_str ? s->img_str : s->real_str);
if (!args)
return AVERROR(ENOMEM);
for (ch = 0; ch < inlink->channels; ch++) {
char *arg = av_strtok(ch == 0 ? args : NULL, "|", &saveptr);
ret = av_expr_parse(&s->imag[ch], arg ? arg : last_expr, var_names,
NULL, NULL, NULL, NULL, 0, ctx);
if (ret < 0)
break;
if (arg)
last_expr = arg;
}
av_free(args);
s->fifo = av_audio_fifo_alloc(inlink->format, inlink->channels, s->window_size);
if (!s->fifo)
return AVERROR(ENOMEM);
s->window_func_lut = av_realloc_f(s->window_func_lut, s->window_size,
sizeof(*s->window_func_lut));
if (!s->window_func_lut)
return AVERROR(ENOMEM);
ff_generate_window_func(s->window_func_lut, s->window_size, s->win_func, &overlap);
if (s->overlap == 1)
s->overlap = overlap;
for (s->win_scale = 0, i = 0; i < s->window_size; i++) {
s->win_scale += s->window_func_lut[i] * s->window_func_lut[i];
}
s->hop_size = s->window_size * (1 - s->overlap);
if (s->hop_size <= 0)
return AVERROR(EINVAL);
s->buffer = ff_get_audio_buffer(inlink, s->window_size * 2);
if (!s->buffer)
return AVERROR(ENOMEM);
return ret;
}