* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#include <ctype.h>
+#include "config.h"
+
#include <string.h>
+#include "libavutil/avassert.h"
+#include "libavutil/avstring.h"
+#include "libavutil/channel_layout.h"
+#include "libavutil/common.h"
+#include "libavutil/internal.h"
+#include "libavutil/log.h"
+#include "libavutil/opt.h"
+
#include "avfilter.h"
-#include "avfiltergraph.h"
+#include "formats.h"
#include "internal.h"
+#include "thread.h"
+
+#define OFFSET(x) offsetof(AVFilterGraph, x)
+#define FLAGS AV_OPT_FLAG_VIDEO_PARAM
+static const AVOption filtergraph_options[] = {
+ { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
+ { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
+ { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .flags = FLAGS, .unit = "thread_type" },
+ { "threads", "Maximum number of threads", OFFSET(nb_threads),
+ AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
+ { NULL },
+};
+
+static const AVClass filtergraph_class = {
+ .class_name = "AVFilterGraph",
+ .item_name = av_default_item_name,
+ .version = LIBAVUTIL_VERSION_INT,
+ .option = filtergraph_options,
+};
+
+#if !HAVE_THREADS
+void ff_graph_thread_free(AVFilterGraph *graph)
+{
+}
+
+int ff_graph_thread_init(AVFilterGraph *graph)
+{
+ graph->thread_type = 0;
+ graph->nb_threads = 1;
+ return 0;
+}
+#endif
AVFilterGraph *avfilter_graph_alloc(void)
{
- return av_mallocz(sizeof(AVFilterGraph));
+ AVFilterGraph *ret = av_mallocz(sizeof(*ret));
+ if (!ret)
+ return NULL;
+
+ ret->internal = av_mallocz(sizeof(*ret->internal));
+ if (!ret->internal) {
+ av_freep(&ret);
+ return NULL;
+ }
+
+ ret->av_class = &filtergraph_class;
+ av_opt_set_defaults(ret);
+
+ return ret;
+}
+
+void ff_filter_graph_remove_filter(AVFilterGraph *graph, AVFilterContext *filter)
+{
+ int i;
+ for (i = 0; i < graph->nb_filters; i++) {
+ if (graph->filters[i] == filter) {
+ FFSWAP(AVFilterContext*, graph->filters[i],
+ graph->filters[graph->nb_filters - 1]);
+ graph->nb_filters--;
+ return;
+ }
+ }
}
void avfilter_graph_free(AVFilterGraph **graph)
{
if (!*graph)
return;
- for (; (*graph)->filter_count > 0; (*graph)->filter_count--)
- avfilter_free((*graph)->filters[(*graph)->filter_count - 1]);
+
+ while ((*graph)->nb_filters)
+ avfilter_free((*graph)->filters[0]);
+
+ ff_graph_thread_free(*graph);
+
av_freep(&(*graph)->scale_sws_opts);
+ av_freep(&(*graph)->resample_lavr_opts);
av_freep(&(*graph)->filters);
+ av_freep(&(*graph)->internal);
av_freep(graph);
}
+#if FF_API_AVFILTER_OPEN
int avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter)
{
AVFilterContext **filters = av_realloc(graph->filters,
- sizeof(AVFilterContext*) * (graph->filter_count+1));
+ sizeof(*filters) * (graph->nb_filters + 1));
if (!filters)
return AVERROR(ENOMEM);
graph->filters = filters;
- graph->filters[graph->filter_count++] = filter;
+ graph->filters[graph->nb_filters++] = filter;
+
+#if FF_API_FOO_COUNT
+FF_DISABLE_DEPRECATION_WARNINGS
+ graph->filter_count = graph->nb_filters;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+
+ filter->graph = graph;
return 0;
}
+#endif
-int avfilter_graph_create_filter(AVFilterContext **filt_ctx, AVFilter *filt,
+int avfilter_graph_create_filter(AVFilterContext **filt_ctx, const AVFilter *filt,
const char *name, const char *args, void *opaque,
AVFilterGraph *graph_ctx)
{
int ret;
- if ((ret = avfilter_open(filt_ctx, filt, name)) < 0)
- goto fail;
- if ((ret = avfilter_init_filter(*filt_ctx, args, opaque)) < 0)
- goto fail;
- if ((ret = avfilter_graph_add_filter(graph_ctx, *filt_ctx)) < 0)
+ *filt_ctx = avfilter_graph_alloc_filter(graph_ctx, filt, name);
+ if (!*filt_ctx)
+ return AVERROR(ENOMEM);
+
+ ret = avfilter_init_str(*filt_ctx, args);
+ if (ret < 0)
goto fail;
+
return 0;
fail:
return ret;
}
-int ff_avfilter_graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx)
+AVFilterContext *avfilter_graph_alloc_filter(AVFilterGraph *graph,
+ const AVFilter *filter,
+ const char *name)
+{
+ AVFilterContext **filters, *s;
+
+ if (graph->thread_type && !graph->internal->thread_execute) {
+ if (graph->execute) {
+ graph->internal->thread_execute = graph->execute;
+ } else {
+ int ret = ff_graph_thread_init(graph);
+ if (ret < 0) {
+ av_log(graph, AV_LOG_ERROR, "Error initializing threading.\n");
+ return NULL;
+ }
+ }
+ }
+
+ s = ff_filter_alloc(filter, name);
+ if (!s)
+ return NULL;
+
+ filters = av_realloc(graph->filters, sizeof(*filters) * (graph->nb_filters + 1));
+ if (!filters) {
+ avfilter_free(s);
+ return NULL;
+ }
+
+ graph->filters = filters;
+ graph->filters[graph->nb_filters++] = s;
+
+#if FF_API_FOO_COUNT
+FF_DISABLE_DEPRECATION_WARNINGS
+ graph->filter_count = graph->nb_filters;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+
+ s->graph = graph;
+
+ return s;
+}
+
+/**
+ * Check for the validity of graph.
+ *
+ * A graph is considered valid if all its input and output pads are
+ * connected.
+ *
+ * @return 0 in case of success, a negative value otherwise
+ */
+static int graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx)
{
AVFilterContext *filt;
int i, j;
- for (i = 0; i < graph->filter_count; i++) {
+ for (i = 0; i < graph->nb_filters; i++) {
filt = graph->filters[i];
- for (j = 0; j < filt->input_count; j++) {
+ for (j = 0; j < filt->nb_inputs; j++) {
if (!filt->inputs[j] || !filt->inputs[j]->src) {
av_log(log_ctx, AV_LOG_ERROR,
"Input pad \"%s\" for the filter \"%s\" of type \"%s\" not connected to any source\n",
}
}
- for (j = 0; j < filt->output_count; j++) {
+ for (j = 0; j < filt->nb_outputs; j++) {
if (!filt->outputs[j] || !filt->outputs[j]->dst) {
av_log(log_ctx, AV_LOG_ERROR,
"Output pad \"%s\" for the filter \"%s\" of type \"%s\" not connected to any destination\n",
return 0;
}
-int ff_avfilter_graph_config_links(AVFilterGraph *graph, AVClass *log_ctx)
+/**
+ * Configure all the links of graphctx.
+ *
+ * @return 0 in case of success, a negative value otherwise
+ */
+static int graph_config_links(AVFilterGraph *graph, AVClass *log_ctx)
{
AVFilterContext *filt;
int i, ret;
- for (i=0; i < graph->filter_count; i++) {
+ for (i = 0; i < graph->nb_filters; i++) {
filt = graph->filters[i];
- if (!filt->output_count) {
+ if (!filt->nb_outputs) {
if ((ret = avfilter_config_links(filt)))
return ret;
}
{
int i;
- for (i = 0; i < graph->filter_count; i++)
+ for (i = 0; i < graph->nb_filters; i++)
if (graph->filters[i]->name && !strcmp(name, graph->filters[i]->name))
return graph->filters[i];
static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
{
int i, j, ret;
- int scaler_count = 0;
- char inst_name[30];
+ int scaler_count = 0, resampler_count = 0;
/* ask all the sub-filters for their supported media formats */
- for (i = 0; i < graph->filter_count; i++) {
+ for (i = 0; i < graph->nb_filters; i++) {
if (graph->filters[i]->filter->query_formats)
graph->filters[i]->filter->query_formats(graph->filters[i]);
else
- avfilter_default_query_formats(graph->filters[i]);
+ ff_default_query_formats(graph->filters[i]);
}
/* go through and merge as many format lists as possible */
- for (i = 0; i < graph->filter_count; i++) {
+ for (i = 0; i < graph->nb_filters; i++) {
AVFilterContext *filter = graph->filters[i];
- for (j = 0; j < filter->input_count; j++) {
+ for (j = 0; j < filter->nb_inputs; j++) {
AVFilterLink *link = filter->inputs[j];
- if (link && link->in_formats != link->out_formats) {
- if (!avfilter_merge_formats(link->in_formats,
- link->out_formats)) {
- AVFilterContext *scale;
- char scale_args[256];
- /* couldn't merge format lists. auto-insert scale filter */
+ int convert_needed = 0;
+
+ if (!link)
+ continue;
+
+ if (link->in_formats != link->out_formats &&
+ !ff_merge_formats(link->in_formats,
+ link->out_formats))
+ convert_needed = 1;
+ if (link->type == AVMEDIA_TYPE_AUDIO) {
+ if (link->in_channel_layouts != link->out_channel_layouts &&
+ !ff_merge_channel_layouts(link->in_channel_layouts,
+ link->out_channel_layouts))
+ convert_needed = 1;
+ if (link->in_samplerates != link->out_samplerates &&
+ !ff_merge_samplerates(link->in_samplerates,
+ link->out_samplerates))
+ convert_needed = 1;
+ }
+
+ if (convert_needed) {
+ AVFilterContext *convert;
+ AVFilter *filter;
+ AVFilterLink *inlink, *outlink;
+ char scale_args[256];
+ char inst_name[30];
+
+ /* couldn't merge format lists. auto-insert conversion filter */
+ switch (link->type) {
+ case AVMEDIA_TYPE_VIDEO:
+ if (!(filter = avfilter_get_by_name("scale"))) {
+ av_log(log_ctx, AV_LOG_ERROR, "'scale' filter "
+ "not present, cannot convert pixel formats.\n");
+ return AVERROR(EINVAL);
+ }
+
snprintf(inst_name, sizeof(inst_name), "auto-inserted scaler %d",
scaler_count++);
- snprintf(scale_args, sizeof(scale_args), "0:0:%s", graph->scale_sws_opts);
- if ((ret = avfilter_graph_create_filter(&scale, avfilter_get_by_name("scale"),
- inst_name, scale_args, NULL, graph)) < 0)
- return ret;
- if ((ret = avfilter_insert_filter(link, scale, 0, 0)) < 0)
- return ret;
- scale->filter->query_formats(scale);
- if (((link = scale-> inputs[0]) &&
- !avfilter_merge_formats(link->in_formats, link->out_formats)) ||
- ((link = scale->outputs[0]) &&
- !avfilter_merge_formats(link->in_formats, link->out_formats))) {
- av_log(log_ctx, AV_LOG_ERROR,
- "Impossible to convert between the formats supported by the filter "
- "'%s' and the filter '%s'\n", link->src->name, link->dst->name);
+ if ((ret = avfilter_graph_create_filter(&convert, filter,
+ inst_name, graph->scale_sws_opts, NULL,
+ graph)) < 0)
+ return ret;
+ break;
+ case AVMEDIA_TYPE_AUDIO:
+ if (!(filter = avfilter_get_by_name("resample"))) {
+ av_log(log_ctx, AV_LOG_ERROR, "'resample' filter "
+ "not present, cannot convert audio formats.\n");
return AVERROR(EINVAL);
}
+
+ snprintf(inst_name, sizeof(inst_name), "auto-inserted resampler %d",
+ resampler_count++);
+ scale_args[0] = '\0';
+ if (graph->resample_lavr_opts)
+ snprintf(scale_args, sizeof(scale_args), "%s",
+ graph->resample_lavr_opts);
+ if ((ret = avfilter_graph_create_filter(&convert, filter,
+ inst_name, scale_args,
+ NULL, graph)) < 0)
+ return ret;
+ break;
+ default:
+ return AVERROR(EINVAL);
+ }
+
+ if ((ret = avfilter_insert_filter(link, convert, 0, 0)) < 0)
+ return ret;
+
+ convert->filter->query_formats(convert);
+ inlink = convert->inputs[0];
+ outlink = convert->outputs[0];
+ if (!ff_merge_formats( inlink->in_formats, inlink->out_formats) ||
+ !ff_merge_formats(outlink->in_formats, outlink->out_formats))
+ ret |= AVERROR(ENOSYS);
+ if (inlink->type == AVMEDIA_TYPE_AUDIO &&
+ (!ff_merge_samplerates(inlink->in_samplerates,
+ inlink->out_samplerates) ||
+ !ff_merge_channel_layouts(inlink->in_channel_layouts,
+ inlink->out_channel_layouts)))
+ ret |= AVERROR(ENOSYS);
+ if (outlink->type == AVMEDIA_TYPE_AUDIO &&
+ (!ff_merge_samplerates(outlink->in_samplerates,
+ outlink->out_samplerates) ||
+ !ff_merge_channel_layouts(outlink->in_channel_layouts,
+ outlink->out_channel_layouts)))
+ ret |= AVERROR(ENOSYS);
+
+ if (ret < 0) {
+ av_log(log_ctx, AV_LOG_ERROR,
+ "Impossible to convert between the formats supported by the filter "
+ "'%s' and the filter '%s'\n", link->src->name, link->dst->name);
+ return ret;
}
}
}
return 0;
}
-static void pick_format(AVFilterLink *link)
+static int pick_format(AVFilterLink *link)
{
if (!link || !link->in_formats)
- return;
+ return 0;
- link->in_formats->format_count = 1;
+ link->in_formats->nb_formats = 1;
link->format = link->in_formats->formats[0];
- avfilter_formats_unref(&link->in_formats);
- avfilter_formats_unref(&link->out_formats);
+ if (link->type == AVMEDIA_TYPE_AUDIO) {
+ if (!link->in_samplerates->nb_formats) {
+ av_log(link->src, AV_LOG_ERROR, "Cannot select sample rate for"
+ " the link between filters %s and %s.\n", link->src->name,
+ link->dst->name);
+ return AVERROR(EINVAL);
+ }
+ link->in_samplerates->nb_formats = 1;
+ link->sample_rate = link->in_samplerates->formats[0];
+
+ if (!link->in_channel_layouts->nb_channel_layouts) {
+ av_log(link->src, AV_LOG_ERROR, "Cannot select channel layout for"
+ "the link between filters %s and %s.\n", link->src->name,
+ link->dst->name);
+ return AVERROR(EINVAL);
+ }
+ link->in_channel_layouts->nb_channel_layouts = 1;
+ link->channel_layout = link->in_channel_layouts->channel_layouts[0];
+ }
+
+ ff_formats_unref(&link->in_formats);
+ ff_formats_unref(&link->out_formats);
+ ff_formats_unref(&link->in_samplerates);
+ ff_formats_unref(&link->out_samplerates);
+ ff_channel_layouts_unref(&link->in_channel_layouts);
+ ff_channel_layouts_unref(&link->out_channel_layouts);
+
+ return 0;
+}
+
+#define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format) \
+do { \
+ for (i = 0; i < filter->nb_inputs; i++) { \
+ AVFilterLink *link = filter->inputs[i]; \
+ fmt_type fmt; \
+ \
+ if (!link->out_ ## list || link->out_ ## list->nb != 1) \
+ continue; \
+ fmt = link->out_ ## list->var[0]; \
+ \
+ for (j = 0; j < filter->nb_outputs; j++) { \
+ AVFilterLink *out_link = filter->outputs[j]; \
+ list_type *fmts; \
+ \
+ if (link->type != out_link->type || \
+ out_link->in_ ## list->nb == 1) \
+ continue; \
+ fmts = out_link->in_ ## list; \
+ \
+ if (!out_link->in_ ## list->nb) { \
+ add_format(&out_link->in_ ##list, fmt); \
+ break; \
+ } \
+ \
+ for (k = 0; k < out_link->in_ ## list->nb; k++) \
+ if (fmts->var[k] == fmt) { \
+ fmts->var[0] = fmt; \
+ fmts->nb = 1; \
+ ret = 1; \
+ break; \
+ } \
+ } \
+ } \
+} while (0)
+
+static int reduce_formats_on_filter(AVFilterContext *filter)
+{
+ int i, j, k, ret = 0;
+
+ REDUCE_FORMATS(int, AVFilterFormats, formats, formats,
+ nb_formats, ff_add_format);
+ REDUCE_FORMATS(int, AVFilterFormats, samplerates, formats,
+ nb_formats, ff_add_format);
+ REDUCE_FORMATS(uint64_t, AVFilterChannelLayouts, channel_layouts,
+ channel_layouts, nb_channel_layouts, ff_add_channel_layout);
+
+ return ret;
+}
+
+static void reduce_formats(AVFilterGraph *graph)
+{
+ int i, reduced;
+
+ do {
+ reduced = 0;
+
+ for (i = 0; i < graph->nb_filters; i++)
+ reduced |= reduce_formats_on_filter(graph->filters[i]);
+ } while (reduced);
+}
+
+static void swap_samplerates_on_filter(AVFilterContext *filter)
+{
+ AVFilterLink *link = NULL;
+ int sample_rate;
+ int i, j;
+
+ for (i = 0; i < filter->nb_inputs; i++) {
+ link = filter->inputs[i];
+
+ if (link->type == AVMEDIA_TYPE_AUDIO &&
+ link->out_samplerates->nb_formats== 1)
+ break;
+ }
+ if (i == filter->nb_inputs)
+ return;
+
+ sample_rate = link->out_samplerates->formats[0];
+
+ for (i = 0; i < filter->nb_outputs; i++) {
+ AVFilterLink *outlink = filter->outputs[i];
+ int best_idx, best_diff = INT_MAX;
+
+ if (outlink->type != AVMEDIA_TYPE_AUDIO ||
+ outlink->in_samplerates->nb_formats < 2)
+ continue;
+
+ for (j = 0; j < outlink->in_samplerates->nb_formats; j++) {
+ int diff = abs(sample_rate - outlink->in_samplerates->formats[j]);
+
+ if (diff < best_diff) {
+ best_diff = diff;
+ best_idx = j;
+ }
+ }
+ FFSWAP(int, outlink->in_samplerates->formats[0],
+ outlink->in_samplerates->formats[best_idx]);
+ }
+}
+
+static void swap_samplerates(AVFilterGraph *graph)
+{
+ int i;
+
+ for (i = 0; i < graph->nb_filters; i++)
+ swap_samplerates_on_filter(graph->filters[i]);
}
-static void pick_formats(AVFilterGraph *graph)
+#define CH_CENTER_PAIR (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER)
+#define CH_FRONT_PAIR (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT)
+#define CH_STEREO_PAIR (AV_CH_STEREO_LEFT | AV_CH_STEREO_RIGHT)
+#define CH_WIDE_PAIR (AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT)
+#define CH_SIDE_PAIR (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT)
+#define CH_DIRECT_PAIR (AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT)
+#define CH_BACK_PAIR (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)
+
+/* allowable substitutions for channel pairs when comparing layouts,
+ * ordered by priority for both values */
+static const uint64_t ch_subst[][2] = {
+ { CH_FRONT_PAIR, CH_CENTER_PAIR },
+ { CH_FRONT_PAIR, CH_WIDE_PAIR },
+ { CH_FRONT_PAIR, AV_CH_FRONT_CENTER },
+ { CH_CENTER_PAIR, CH_FRONT_PAIR },
+ { CH_CENTER_PAIR, CH_WIDE_PAIR },
+ { CH_CENTER_PAIR, AV_CH_FRONT_CENTER },
+ { CH_WIDE_PAIR, CH_FRONT_PAIR },
+ { CH_WIDE_PAIR, CH_CENTER_PAIR },
+ { CH_WIDE_PAIR, AV_CH_FRONT_CENTER },
+ { AV_CH_FRONT_CENTER, CH_FRONT_PAIR },
+ { AV_CH_FRONT_CENTER, CH_CENTER_PAIR },
+ { AV_CH_FRONT_CENTER, CH_WIDE_PAIR },
+ { CH_SIDE_PAIR, CH_DIRECT_PAIR },
+ { CH_SIDE_PAIR, CH_BACK_PAIR },
+ { CH_SIDE_PAIR, AV_CH_BACK_CENTER },
+ { CH_BACK_PAIR, CH_DIRECT_PAIR },
+ { CH_BACK_PAIR, CH_SIDE_PAIR },
+ { CH_BACK_PAIR, AV_CH_BACK_CENTER },
+ { AV_CH_BACK_CENTER, CH_BACK_PAIR },
+ { AV_CH_BACK_CENTER, CH_DIRECT_PAIR },
+ { AV_CH_BACK_CENTER, CH_SIDE_PAIR },
+};
+
+static void swap_channel_layouts_on_filter(AVFilterContext *filter)
{
+ AVFilterLink *link = NULL;
+ int i, j, k;
+
+ for (i = 0; i < filter->nb_inputs; i++) {
+ link = filter->inputs[i];
+
+ if (link->type == AVMEDIA_TYPE_AUDIO &&
+ link->out_channel_layouts->nb_channel_layouts == 1)
+ break;
+ }
+ if (i == filter->nb_inputs)
+ return;
+
+ for (i = 0; i < filter->nb_outputs; i++) {
+ AVFilterLink *outlink = filter->outputs[i];
+ int best_idx = -1, best_score = INT_MIN, best_count_diff = INT_MAX;
+
+ if (outlink->type != AVMEDIA_TYPE_AUDIO ||
+ outlink->in_channel_layouts->nb_channel_layouts < 2)
+ continue;
+
+ for (j = 0; j < outlink->in_channel_layouts->nb_channel_layouts; j++) {
+ uint64_t in_chlayout = link->out_channel_layouts->channel_layouts[0];
+ uint64_t out_chlayout = outlink->in_channel_layouts->channel_layouts[j];
+ int in_channels = av_get_channel_layout_nb_channels(in_chlayout);
+ int out_channels = av_get_channel_layout_nb_channels(out_chlayout);
+ int count_diff = out_channels - in_channels;
+ int matched_channels, extra_channels;
+ int score = 0;
+
+ /* channel substitution */
+ for (k = 0; k < FF_ARRAY_ELEMS(ch_subst); k++) {
+ uint64_t cmp0 = ch_subst[k][0];
+ uint64_t cmp1 = ch_subst[k][1];
+ if (( in_chlayout & cmp0) && (!(out_chlayout & cmp0)) &&
+ (out_chlayout & cmp1) && (!( in_chlayout & cmp1))) {
+ in_chlayout &= ~cmp0;
+ out_chlayout &= ~cmp1;
+ /* add score for channel match, minus a deduction for
+ having to do the substitution */
+ score += 10 * av_get_channel_layout_nb_channels(cmp1) - 2;
+ }
+ }
+
+ /* no penalty for LFE channel mismatch */
+ if ( (in_chlayout & AV_CH_LOW_FREQUENCY) &&
+ (out_chlayout & AV_CH_LOW_FREQUENCY))
+ score += 10;
+ in_chlayout &= ~AV_CH_LOW_FREQUENCY;
+ out_chlayout &= ~AV_CH_LOW_FREQUENCY;
+
+ matched_channels = av_get_channel_layout_nb_channels(in_chlayout &
+ out_chlayout);
+ extra_channels = av_get_channel_layout_nb_channels(out_chlayout &
+ (~in_chlayout));
+ score += 10 * matched_channels - 5 * extra_channels;
+
+ if (score > best_score ||
+ (count_diff < best_count_diff && score == best_score)) {
+ best_score = score;
+ best_idx = j;
+ best_count_diff = count_diff;
+ }
+ }
+ av_assert0(best_idx >= 0);
+ FFSWAP(uint64_t, outlink->in_channel_layouts->channel_layouts[0],
+ outlink->in_channel_layouts->channel_layouts[best_idx]);
+ }
+
+}
+
+static void swap_channel_layouts(AVFilterGraph *graph)
+{
+ int i;
+
+ for (i = 0; i < graph->nb_filters; i++)
+ swap_channel_layouts_on_filter(graph->filters[i]);
+}
+
+static void swap_sample_fmts_on_filter(AVFilterContext *filter)
+{
+ AVFilterLink *link = NULL;
+ int format, bps;
int i, j;
- for (i = 0; i < graph->filter_count; i++) {
+ for (i = 0; i < filter->nb_inputs; i++) {
+ link = filter->inputs[i];
+
+ if (link->type == AVMEDIA_TYPE_AUDIO &&
+ link->out_formats->nb_formats == 1)
+ break;
+ }
+ if (i == filter->nb_inputs)
+ return;
+
+ format = link->out_formats->formats[0];
+ bps = av_get_bytes_per_sample(format);
+
+ for (i = 0; i < filter->nb_outputs; i++) {
+ AVFilterLink *outlink = filter->outputs[i];
+ int best_idx = -1, best_score = INT_MIN;
+
+ if (outlink->type != AVMEDIA_TYPE_AUDIO ||
+ outlink->in_formats->nb_formats < 2)
+ continue;
+
+ for (j = 0; j < outlink->in_formats->nb_formats; j++) {
+ int out_format = outlink->in_formats->formats[j];
+ int out_bps = av_get_bytes_per_sample(out_format);
+ int score;
+
+ if (av_get_packed_sample_fmt(out_format) == format ||
+ av_get_planar_sample_fmt(out_format) == format) {
+ best_idx = j;
+ break;
+ }
+
+ /* for s32 and float prefer double to prevent loss of information */
+ if (bps == 4 && out_bps == 8) {
+ best_idx = j;
+ break;
+ }
+
+ /* prefer closest higher or equal bps */
+ score = -abs(out_bps - bps);
+ if (out_bps >= bps)
+ score += INT_MAX/2;
+
+ if (score > best_score) {
+ best_score = score;
+ best_idx = j;
+ }
+ }
+ av_assert0(best_idx >= 0);
+ FFSWAP(int, outlink->in_formats->formats[0],
+ outlink->in_formats->formats[best_idx]);
+ }
+}
+
+static void swap_sample_fmts(AVFilterGraph *graph)
+{
+ int i;
+
+ for (i = 0; i < graph->nb_filters; i++)
+ swap_sample_fmts_on_filter(graph->filters[i]);
+
+}
+
+static int pick_formats(AVFilterGraph *graph)
+{
+ int i, j, ret;
+
+ for (i = 0; i < graph->nb_filters; i++) {
AVFilterContext *filter = graph->filters[i];
- for (j = 0; j < filter->input_count; j++)
- pick_format(filter->inputs[j]);
- for (j = 0; j < filter->output_count; j++)
- pick_format(filter->outputs[j]);
+ for (j = 0; j < filter->nb_inputs; j++)
+ if ((ret = pick_format(filter->inputs[j])) < 0)
+ return ret;
+ for (j = 0; j < filter->nb_outputs; j++)
+ if ((ret = pick_format(filter->outputs[j])) < 0)
+ return ret;
}
+ return 0;
}
-int ff_avfilter_graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx)
+/**
+ * Configure the formats of all the links in the graph.
+ */
+static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx)
{
int ret;
return ret;
/* Once everything is merged, it's possible that we'll still have
- * multiple valid media format choices. We pick the first one. */
- pick_formats(graph);
+ * multiple valid media format choices. We try to minimize the amount
+ * of format conversion inside filters */
+ reduce_formats(graph);
+
+ /* for audio filters, ensure the best format, sample rate and channel layout
+ * is selected */
+ swap_sample_fmts(graph);
+ swap_samplerates(graph);
+ swap_channel_layouts(graph);
+
+ if ((ret = pick_formats(graph)) < 0)
+ return ret;
+
+ return 0;
+}
+
+static int graph_insert_fifos(AVFilterGraph *graph, AVClass *log_ctx)
+{
+ AVFilterContext *f;
+ int i, j, ret;
+ int fifo_count = 0;
+
+ for (i = 0; i < graph->nb_filters; i++) {
+ f = graph->filters[i];
+
+ for (j = 0; j < f->nb_inputs; j++) {
+ AVFilterLink *link = f->inputs[j];
+ AVFilterContext *fifo_ctx;
+ AVFilter *fifo;
+ char name[32];
+
+ if (!link->dstpad->needs_fifo)
+ continue;
+
+ fifo = f->inputs[j]->type == AVMEDIA_TYPE_VIDEO ?
+ avfilter_get_by_name("fifo") :
+ avfilter_get_by_name("afifo");
+
+ snprintf(name, sizeof(name), "auto-inserted fifo %d", fifo_count++);
+
+ ret = avfilter_graph_create_filter(&fifo_ctx, fifo, name, NULL,
+ NULL, graph);
+ if (ret < 0)
+ return ret;
+
+ ret = avfilter_insert_filter(link, fifo_ctx, 0, 0);
+ if (ret < 0)
+ return ret;
+ }
+ }
return 0;
}
{
int ret;
- if ((ret = ff_avfilter_graph_check_validity(graphctx, log_ctx)))
+ if ((ret = graph_check_validity(graphctx, log_ctx)))
+ return ret;
+ if ((ret = graph_insert_fifos(graphctx, log_ctx)) < 0)
return ret;
- if ((ret = ff_avfilter_graph_config_formats(graphctx, log_ctx)))
+ if ((ret = graph_config_formats(graphctx, log_ctx)))
return ret;
- if ((ret = ff_avfilter_graph_config_links(graphctx, log_ctx)))
+ if ((ret = graph_config_links(graphctx, log_ctx)))
return ret;
return 0;
projects / ffmpeg / blobdiff