* filter layer
* Copyright (c) 2007 Bobby Bingham
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-/* #define DEBUG */
-
+#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
-#include "video.h"
+#include "audio.h"
+
+static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame);
+
+void ff_tlog_ref(void *ctx, AVFrame *ref, int end)
+{
+ av_unused char buf[16];
+ ff_tlog(ctx,
+ "ref[%p buf:%p data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
+ ref, ref->buf, ref->data[0],
+ ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
+ ref->pts, av_frame_get_pkt_pos(ref));
+
+ if (ref->width) {
+ ff_tlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c",
+ ref->sample_aspect_ratio.num, ref->sample_aspect_ratio.den,
+ ref->width, ref->height,
+ !ref->interlaced_frame ? 'P' : /* Progressive */
+ ref->top_field_first ? 'T' : 'B', /* Top / Bottom */
+ ref->key_frame,
+ av_get_picture_type_char(ref->pict_type));
+ }
+ if (ref->nb_samples) {
+ ff_tlog(ctx, " cl:%"PRId64"d n:%d r:%d",
+ ref->channel_layout,
+ ref->nb_samples,
+ ref->sample_rate);
+ }
+
+ ff_tlog(ctx, "]%s", end ? "\n" : "");
+}
unsigned avfilter_version(void) {
+ av_assert0(LIBAVFILTER_VERSION_MICRO >= 100);
return LIBAVFILTER_VERSION_INT;
}
const char *avfilter_configuration(void)
{
- return LIBAV_CONFIGURATION;
+ return FFMPEG_CONFIGURATION;
}
const char *avfilter_license(void)
{
#define LICENSE_PREFIX "libavfilter license: "
- return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
+ return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
+}
+
+void ff_command_queue_pop(AVFilterContext *filter)
+{
+ AVFilterCommand *c= filter->command_queue;
+ av_freep(&c->arg);
+ av_freep(&c->command);
+ filter->command_queue= c->next;
+ av_free(c);
}
void ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
av_log(src, AV_LOG_ERROR,
- "Media type mismatch between the '%s' filter output pad %d and the '%s' filter input pad %d\n",
- src->name, srcpad, dst->name, dstpad);
+ "Media type mismatch between the '%s' filter output pad %d (%s) and the '%s' filter input pad %d (%s)\n",
+ src->name, srcpad, (char *)av_x_if_null(av_get_media_type_string(src->output_pads[srcpad].type), "?"),
+ dst->name, dstpad, (char *)av_x_if_null(av_get_media_type_string(dst-> input_pads[dstpad].type), "?"));
return AVERROR(EINVAL);
}
link->srcpad = &src->output_pads[srcpad];
link->dstpad = &dst->input_pads[dstpad];
link->type = src->output_pads[srcpad].type;
- assert(AV_PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
+ av_assert0(AV_PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
link->format = -1;
return 0;
}
+void avfilter_link_free(AVFilterLink **link)
+{
+ if (!*link)
+ return;
+
+ av_frame_free(&(*link)->partial_buf);
+
+ av_freep(link);
+}
+
+int avfilter_link_get_channels(AVFilterLink *link)
+{
+ return link->channels;
+}
+
+void avfilter_link_set_closed(AVFilterLink *link, int closed)
+{
+ link->closed = closed;
+}
+
int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
{
if (link->out_formats)
ff_formats_changeref(&link->out_formats,
&filt->outputs[filt_dstpad_idx]->out_formats);
+
if (link->out_samplerates)
ff_formats_changeref(&link->out_samplerates,
&filt->outputs[filt_dstpad_idx]->out_samplerates);
for (i = 0; i < filter->nb_inputs; i ++) {
AVFilterLink *link = filter->inputs[i];
+ AVFilterLink *inlink;
if (!link) continue;
+ inlink = link->src->nb_inputs ? link->src->inputs[0] : NULL;
+ link->current_pts = AV_NOPTS_VALUE;
+
switch (link->init_state) {
case AVLINK_INIT:
continue;
return ret;
}
- if (link->time_base.num == 0 && link->time_base.den == 0)
- link->time_base = link->src && link->src->nb_inputs ?
- link->src->inputs[0]->time_base : AV_TIME_BASE_Q;
+ switch (link->type) {
+ case AVMEDIA_TYPE_VIDEO:
+ if (!link->time_base.num && !link->time_base.den)
+ link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q;
- if (link->type == AVMEDIA_TYPE_VIDEO) {
if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
- link->sample_aspect_ratio = link->src->nb_inputs ?
- link->src->inputs[0]->sample_aspect_ratio : (AVRational){1,1};
+ link->sample_aspect_ratio = inlink ?
+ inlink->sample_aspect_ratio : (AVRational){1,1};
- if (link->src->nb_inputs) {
+ if (inlink && !link->frame_rate.num && !link->frame_rate.den)
+ link->frame_rate = inlink->frame_rate;
+
+ if (inlink) {
if (!link->w)
- link->w = link->src->inputs[0]->w;
+ link->w = inlink->w;
if (!link->h)
- link->h = link->src->inputs[0]->h;
+ link->h = inlink->h;
} else if (!link->w || !link->h) {
av_log(link->src, AV_LOG_ERROR,
"Video source filters must set their output link's "
"width and height\n");
return AVERROR(EINVAL);
}
+ break;
+
+ case AVMEDIA_TYPE_AUDIO:
+ if (inlink) {
+ if (!link->time_base.num && !link->time_base.den)
+ link->time_base = inlink->time_base;
+ }
+
+ if (!link->time_base.num && !link->time_base.den)
+ link->time_base = (AVRational) {1, link->sample_rate};
}
if ((config_link = link->dstpad->config_props))
return 0;
}
-void ff_dlog_link(void *ctx, AVFilterLink *link, int end)
+void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
{
if (link->type == AVMEDIA_TYPE_VIDEO) {
- av_dlog(ctx,
- "link[%p s:%dx%d fmt:%-16s %-16s->%-16s]%s",
+ ff_tlog(ctx,
+ "link[%p s:%dx%d fmt:%s %s->%s]%s",
link, link->w, link->h,
av_get_pix_fmt_name(link->format),
link->src ? link->src->filter->name : "",
char buf[128];
av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
- av_dlog(ctx,
- "link[%p r:%d cl:%s fmt:%-16s %-16s->%-16s]%s",
- link, link->sample_rate, buf,
+ ff_tlog(ctx,
+ "link[%p r:%d cl:%s fmt:%s %s->%s]%s",
+ link, (int)link->sample_rate, buf,
av_get_sample_fmt_name(link->format),
link->src ? link->src->filter->name : "",
link->dst ? link->dst->filter->name : "",
int ff_request_frame(AVFilterLink *link)
{
- FF_DPRINTF_START(NULL, request_frame); ff_dlog_link(NULL, link, 1);
-
- if (link->srcpad->request_frame)
- return link->srcpad->request_frame(link);
- else if (link->src->inputs[0])
- return ff_request_frame(link->src->inputs[0]);
- else return -1;
+ int ret = -1;
+ FF_TPRINTF_START(NULL, request_frame); ff_tlog_link(NULL, link, 1);
+
+ if (link->closed)
+ return AVERROR_EOF;
+ av_assert0(!link->frame_requested);
+ link->frame_requested = 1;
+ while (link->frame_requested) {
+ if (link->srcpad->request_frame)
+ ret = link->srcpad->request_frame(link);
+ else if (link->src->inputs[0])
+ ret = ff_request_frame(link->src->inputs[0]);
+ if (ret == AVERROR_EOF && link->partial_buf) {
+ AVFrame *pbuf = link->partial_buf;
+ link->partial_buf = NULL;
+ ret = ff_filter_frame_framed(link, pbuf);
+ }
+ if (ret < 0) {
+ link->frame_requested = 0;
+ if (ret == AVERROR_EOF)
+ link->closed = 1;
+ } else {
+ av_assert0(!link->frame_requested ||
+ link->flags & FF_LINK_FLAG_REQUEST_LOOP);
+ }
+ }
+ return ret;
}
int ff_poll_frame(AVFilterLink *link)
return min;
}
-#define MAX_REGISTERED_AVFILTERS_NB 64
+void ff_update_link_current_pts(AVFilterLink *link, int64_t pts)
+{
+ if (pts == AV_NOPTS_VALUE)
+ return;
+ link->current_pts = av_rescale_q(pts, link->time_base, AV_TIME_BASE_Q);
+ /* TODO use duration */
+ if (link->graph && link->age_index >= 0)
+ ff_avfilter_graph_update_heap(link->graph, link);
+}
+
+int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
+{
+ if(!strcmp(cmd, "ping")){
+ av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
+ return 0;
+ }else if(filter->filter->process_command) {
+ return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
+ }
+ return AVERROR(ENOSYS);
+}
+
+#define MAX_REGISTERED_AVFILTERS_NB 256
static AVFilter *registered_avfilters[MAX_REGISTERED_AVFILTERS_NB + 1];
int avfilter_register(AVFilter *filter)
{
- if (next_registered_avfilter_idx == MAX_REGISTERED_AVFILTERS_NB)
- return -1;
+ int i;
+
+ if (next_registered_avfilter_idx == MAX_REGISTERED_AVFILTERS_NB) {
+ av_log(NULL, AV_LOG_ERROR,
+ "Maximum number of registered filters %d reached, "
+ "impossible to register filter with name '%s'\n",
+ MAX_REGISTERED_AVFILTERS_NB, filter->name);
+ return AVERROR(ENOMEM);
+ }
+
+ for(i=0; filter->inputs && filter->inputs[i].name; i++) {
+ const AVFilterPad *input = &filter->inputs[i];
+ av_assert0( !input->filter_frame
+ || (!input->start_frame && !input->end_frame));
+ }
registered_avfilters[next_registered_avfilter_idx++] = filter;
return 0;
return count;
}
-static const char *filter_name(void *p)
+static const char *default_filter_name(void *filter_ctx)
{
- AVFilterContext *filter = p;
- return filter->filter->name;
+ AVFilterContext *ctx = filter_ctx;
+ return ctx->name ? ctx->name : ctx->filter->name;
}
static void *filter_child_next(void *obj, void *prev)
{
AVFilter **f = NULL;
+ /* find the filter that corresponds to prev */
while (prev && *(f = av_filter_next(f)))
if ((*f)->priv_class == prev)
break;
+ /* could not find filter corresponding to prev */
+ if (prev && !(*f))
+ return NULL;
+
+ /* find next filter with specific options */
while (*(f = av_filter_next(f)))
if ((*f)->priv_class)
return (*f)->priv_class;
-
return NULL;
}
static const AVClass avfilter_class = {
.class_name = "AVFilter",
- .item_name = filter_name,
+ .item_name = default_filter_name,
.version = LIBAVUTIL_VERSION_INT,
+ .category = AV_CLASS_CATEGORY_FILTER,
.child_next = filter_child_next,
.child_class_next = filter_child_class_next,
};
int i;
AVFilterLink *link;
+ if (!filter)
+ return;
+
if (filter->graph)
ff_filter_graph_remove_filter(filter->graph, filter);
ff_channel_layouts_unref(&link->in_channel_layouts);
ff_channel_layouts_unref(&link->out_channel_layouts);
}
- av_freep(&link);
+ avfilter_link_free(&link);
}
for (i = 0; i < filter->nb_outputs; i++) {
if ((link = filter->outputs[i])) {
ff_channel_layouts_unref(&link->in_channel_layouts);
ff_channel_layouts_unref(&link->out_channel_layouts);
}
- av_freep(&link);
+ avfilter_link_free(&link);
}
- if (filter->filter->priv_class)
+ if (filter->filter->priv_class || filter->filter->shorthand)
av_opt_free(filter->priv);
av_freep(&filter->name);
av_freep(&filter->inputs);
av_freep(&filter->outputs);
av_freep(&filter->priv);
+ while(filter->command_queue){
+ ff_command_queue_pop(filter);
+ }
av_free(filter);
}
-/* process a list of value1:value2:..., each value corresponding
- * to subsequent AVOption, in the order they are declared */
-static int process_unnamed_options(AVFilterContext *ctx, AVDictionary **options,
- const char *args)
+static int process_options(AVFilterContext *ctx, AVDictionary **options,
+ const char *args)
{
const AVOption *o = NULL;
- const char *p = args;
- char *val;
+ int ret, count = 0;
+ char *av_uninit(parsed_key), *av_uninit(value);
+ const char *key;
+ int offset= -1;
+
+ if (!args)
+ return 0;
+
+ while (*args) {
+ const char *shorthand = NULL;
- while (*p) {
o = av_opt_next(ctx->priv, o);
- if (!o) {
- av_log(ctx, AV_LOG_ERROR, "More options provided than "
- "this filter supports.\n");
- return AVERROR(EINVAL);
+ if (o) {
+ if (o->type == AV_OPT_TYPE_CONST || o->offset == offset)
+ continue;
+ offset = o->offset;
+ shorthand = o->name;
}
- if (o->type == AV_OPT_TYPE_CONST)
- continue;
- val = av_get_token(&p, ":");
- if (!val)
- return AVERROR(ENOMEM);
+ ret = av_opt_get_key_value(&args, "=", ":",
+ shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,
+ &parsed_key, &value);
+ if (ret < 0) {
+ if (ret == AVERROR(EINVAL))
+ av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", args);
+ else
+ av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", args,
+ av_err2str(ret));
+ return ret;
+ }
+ if (*args)
+ args++;
+ if (parsed_key) {
+ key = parsed_key;
+ while ((o = av_opt_next(ctx->priv, o))); /* discard all remaining shorthand */
+ } else {
+ key = shorthand;
+ }
- av_dict_set(options, o->name, val, 0);
+ av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);
+ av_dict_set(options, key, value, 0);
+ if ((ret = av_opt_set(ctx->priv, key, value, 0)) < 0) {
+ if (!av_opt_find(ctx->priv, key, NULL, 0, AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) {
+ if (ret == AVERROR_OPTION_NOT_FOUND)
+ av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);
+ av_free(value);
+ av_free(parsed_key);
+ return ret;
+ }
+ }
- av_freep(&val);
- if (*p)
- p++;
+ av_free(value);
+ av_free(parsed_key);
+ count++;
}
+ return count;
+}
+// TODO: drop me
+static const char *const filters_left_to_update[] = {
+ "abuffer",
+#if FF_API_ACONVERT_FILTER
+ "aconvert",
+#endif
+ "atempo",
+ "buffer",
+ "pan",
+ "scale",
+};
+
+static int filter_use_deprecated_init(const char *name)
+{
+ int i;
+ for (i = 0; i < FF_ARRAY_ELEMS(filters_left_to_update); i++)
+ if (!strcmp(name, filters_left_to_update[i]))
+ return 1;
return 0;
}
AVDictionary *options = NULL;
AVDictionaryEntry *e;
int ret=0;
+ int deprecated_init = filter_use_deprecated_init(filter->filter->name);
+
+ // TODO: remove old shorthand
+ if (filter->filter->shorthand) {
+ av_assert0(filter->priv);
+ av_assert0(filter->filter->priv_class);
+ *(const AVClass **)filter->priv = filter->filter->priv_class;
+ av_opt_set_defaults(filter->priv);
+ ret = av_opt_set_from_string(filter->priv, args,
+ filter->filter->shorthand, "=", ":");
+ if (ret < 0)
+ return ret;
+ args = NULL;
+ }
- if (args && *args) {
+ if (!deprecated_init && args && *args) {
if (!filter->filter->priv_class) {
av_log(filter, AV_LOG_ERROR, "This filter does not take any "
"options, but options were provided: %s.\n", args);
ret = av_dict_parse_string(&options, p, "=", ":", 0);
}
if (ret >= 0)
- ret = process_unnamed_options(filter, &options, copy);
+ ret = process_options(filter, &options, copy);
av_freep(©);
if (ret < 0)
goto fail;
- } else
-#endif
-
- if (strchr(args, '=')) {
- /* assume a list of key1=value1:key2=value2:... */
- ret = av_dict_parse_string(&options, args, "=", ":", 0);
- if (ret < 0)
- goto fail;
-#if FF_API_OLD_FILTER_OPTS
} else if (!strcmp(filter->filter->name, "format") ||
!strcmp(filter->filter->name, "noformat") ||
!strcmp(filter->filter->name, "frei0r") ||
!strcmp(filter->filter->name, "frei0r_src") ||
- !strcmp(filter->filter->name, "ocv")) {
+ !strcmp(filter->filter->name, "ocv") ||
+ !strcmp(filter->filter->name, "pp") ||
+ !strcmp(filter->filter->name, "aevalsrc")) {
/* a hack for compatibility with the old syntax
* replace colons with |s */
char *copy = av_strdup(args);
char *p = copy;
int nb_leading = 0; // number of leading colons to skip
+ int deprecated = 0;
if (!copy) {
ret = AVERROR(ENOMEM);
p++;
}
- if (strchr(p, ':')) {
- av_log(filter, AV_LOG_WARNING, "This syntax is deprecated. Use "
- "'|' to separate the list items.\n");
- }
-
+ deprecated = strchr(p, ':') != NULL;
+
+ if (!strcmp(filter->filter->name, "aevalsrc")) {
+ deprecated = 0;
+ while ((p = strchr(p, ':')) && p[1] != ':') {
+ const char *epos = strchr(p + 1, '=');
+ const char *spos = strchr(p + 1, ':');
+ const int next_token_is_opt = epos && (!spos || epos < spos);
+ if (next_token_is_opt) {
+ p++;
+ break;
+ }
+ /* next token does not contain a '=', assume a channel expression */
+ deprecated = 1;
+ *p++ = '|';
+ }
+ if (p && *p == ':') { // double sep '::' found
+ deprecated = 1;
+ memmove(p, p + 1, strlen(p));
+ }
+ } else
while ((p = strchr(p, ':')))
*p++ = '|';
- ret = process_unnamed_options(filter, &options, copy);
+ if (deprecated)
+ av_log(filter, AV_LOG_WARNING, "This syntax is deprecated. Use "
+ "'|' to separate the list items.\n");
+
+ av_log(filter, AV_LOG_DEBUG, "compat: called with args=[%s]\n", copy);
+ ret = process_options(filter, &options, copy);
av_freep(©);
if (ret < 0)
goto fail;
#endif
} else {
- ret = process_unnamed_options(filter, &options, args);
+#if CONFIG_MP_FILTER
+ if (!strcmp(filter->filter->name, "mp")) {
+ char *escaped;
+
+ if (!strncmp(args, "filter=", 7))
+ args += 7;
+ ret = av_escape(&escaped, args, ":=", AV_ESCAPE_MODE_BACKSLASH, 0);
+ if (ret < 0) {
+ av_log(filter, AV_LOG_ERROR, "Unable to escape MPlayer filters arg '%s'\n", args);
+ goto fail;
+ }
+ ret = process_options(filter, &options, escaped);
+ av_free(escaped);
+ } else
+#endif
+ ret = process_options(filter, &options, args);
if (ret < 0)
goto fail;
}
}
- if (filter->filter->priv_class) {
+ if (!deprecated_init && filter->filter->priv_class) {
ret = av_opt_set_dict(filter->priv, &options);
if (ret < 0) {
av_log(filter, AV_LOG_ERROR, "Error applying options to the filter.\n");
}
}
- if (filter->filter->init)
- ret = filter->filter->init(filter);
+ if (filter->filter->init_opaque)
+ ret = filter->filter->init_opaque(filter, args, opaque);
+ else if (filter->filter->init)
+ ret = filter->filter->init(filter, args);
else if (filter->filter->init_dict)
ret = filter->filter->init_dict(filter, &options);
if (ret < 0)
return ff_filter_frame(link->dst->outputs[0], frame);
}
-int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
+static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame)
{
int (*filter_frame)(AVFilterLink *, AVFrame *);
AVFilterPad *dst = link->dstpad;
AVFrame *out;
+ int ret;
+ AVFilterCommand *cmd= link->dst->command_queue;
+ int64_t pts;
- FF_DPRINTF_START(NULL, filter_frame);
- ff_dlog_link(NULL, link, 1);
+ if (link->closed) {
+ av_frame_free(&frame);
+ return AVERROR_EOF;
+ }
if (!(filter_frame = dst->filter_frame))
filter_frame = default_filter_frame;
if (dst->needs_writable && !av_frame_is_writable(frame)) {
av_log(link->dst, AV_LOG_DEBUG, "Copying data in avfilter.\n");
+ /* Maybe use ff_copy_buffer_ref instead? */
switch (link->type) {
case AVMEDIA_TYPE_VIDEO:
out = ff_get_video_buffer(link, link->w, link->h);
switch (link->type) {
case AVMEDIA_TYPE_VIDEO:
- av_image_copy(out->data, out->linesize, frame->data, frame->linesize,
+ av_image_copy(out->data, out->linesize, (const uint8_t **)frame->data, frame->linesize,
frame->format, frame->width, frame->height);
break;
case AVMEDIA_TYPE_AUDIO:
} else
out = frame;
- return filter_frame(link, out);
+ while(cmd && cmd->time <= out->pts * av_q2d(link->time_base)){
+ av_log(link->dst, AV_LOG_DEBUG,
+ "Processing command time:%f command:%s arg:%s\n",
+ cmd->time, cmd->command, cmd->arg);
+ avfilter_process_command(link->dst, cmd->command, cmd->arg, 0, 0, cmd->flags);
+ ff_command_queue_pop(link->dst);
+ cmd= link->dst->command_queue;
+ }
+
+ pts = out->pts;
+ ret = filter_frame(link, out);
+ link->frame_requested = 0;
+ ff_update_link_current_pts(link, pts);
+ return ret;
+}
+
+static int ff_filter_frame_needs_framing(AVFilterLink *link, AVFrame *frame)
+{
+ int insamples = frame->nb_samples, inpos = 0, nb_samples;
+ AVFrame *pbuf = link->partial_buf;
+ int nb_channels = av_frame_get_channels(frame);
+ int ret = 0;
+
+ link->flags |= FF_LINK_FLAG_REQUEST_LOOP;
+ /* Handle framing (min_samples, max_samples) */
+ while (insamples) {
+ if (!pbuf) {
+ AVRational samples_tb = { 1, link->sample_rate };
+ pbuf = ff_get_audio_buffer(link, link->partial_buf_size);
+ if (!pbuf) {
+ av_log(link->dst, AV_LOG_WARNING,
+ "Samples dropped due to memory allocation failure.\n");
+ return 0;
+ }
+ av_frame_copy_props(pbuf, frame);
+ pbuf->pts = frame->pts +
+ av_rescale_q(inpos, samples_tb, link->time_base);
+ pbuf->nb_samples = 0;
+ }
+ nb_samples = FFMIN(insamples,
+ link->partial_buf_size - pbuf->nb_samples);
+ av_samples_copy(pbuf->extended_data, frame->extended_data,
+ pbuf->nb_samples, inpos,
+ nb_samples, nb_channels, link->format);
+ inpos += nb_samples;
+ insamples -= nb_samples;
+ pbuf->nb_samples += nb_samples;
+ if (pbuf->nb_samples >= link->min_samples) {
+ ret = ff_filter_frame_framed(link, pbuf);
+ pbuf = NULL;
+ }
+ }
+ av_frame_free(&frame);
+ link->partial_buf = pbuf;
+ return ret;
+}
+
+int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
+{
+ FF_TPRINTF_START(NULL, filter_frame); ff_tlog_link(NULL, link, 1); ff_tlog(NULL, " "); ff_tlog_ref(NULL, frame, 1);
+
+ /* Consistency checks */
+ if (link->type == AVMEDIA_TYPE_VIDEO) {
+ if (strcmp(link->dst->filter->name, "scale")) {
+ av_assert1(frame->format == link->format);
+ av_assert1(frame->width == link->w);
+ av_assert1(frame->height == link->h);
+ }
+ } else {
+ av_assert1(frame->format == link->format);
+ av_assert1(av_frame_get_channels(frame) == link->channels);
+ av_assert1(frame->channel_layout == link->channel_layout);
+ av_assert1(frame->sample_rate == link->sample_rate);
+ }
+
+ /* Go directly to actual filtering if possible */
+ if (link->type == AVMEDIA_TYPE_AUDIO &&
+ link->min_samples &&
+ (link->partial_buf ||
+ frame->nb_samples < link->min_samples ||
+ frame->nb_samples > link->max_samples)) {
+ return ff_filter_frame_needs_framing(link, frame);
+ } else {
+ return ff_filter_frame_framed(link, frame);
+ }
}
const AVClass *avfilter_get_class(void)