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-rw-r--r--libavfilter/formats.c340
1 files changed, 305 insertions, 35 deletions
diff --git a/libavfilter/formats.c b/libavfilter/formats.c
index 24a4fab0d1..816042987d 100644
--- a/libavfilter/formats.c
+++ b/libavfilter/formats.c
@@ -2,29 +2,35 @@
* Filter layer - format negotiation
* 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
*/
+#include "libavutil/avassert.h"
+#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
+#include "libavutil/eval.h"
#include "libavutil/pixdesc.h"
+#include "libavutil/parseutils.h"
#include "avfilter.h"
#include "internal.h"
#include "formats.h"
+#define KNOWN(l) (!FF_LAYOUT2COUNT(l)) /* for readability */
+
/**
* Add all refs from a to ret and destroy a.
*/
@@ -33,8 +39,8 @@ do { \
type ***tmp; \
int i; \
\
- if (!(tmp = av_realloc(ret->refs, \
- sizeof(*tmp) * (ret->refcount + a->refcount)))) \
+ if (!(tmp = av_realloc_array(ret->refs, ret->refcount + a->refcount, \
+ sizeof(*tmp)))) \
goto fail; \
ret->refs = tmp; \
\
@@ -60,15 +66,21 @@ do {
goto fail; \
\
if (count) { \
- if (!(ret->fmts = av_malloc(sizeof(*ret->fmts) * count))) \
+ if (!(ret->fmts = av_malloc_array(count, sizeof(*ret->fmts)))) \
goto fail; \
for (i = 0; i < a->nb; i++) \
for (j = 0; j < b->nb; j++) \
- if (a->fmts[i] == b->fmts[j]) \
+ if (a->fmts[i] == b->fmts[j]) { \
+ if(k >= FFMIN(a->nb, b->nb)){ \
+ av_log(NULL, AV_LOG_ERROR, "Duplicate formats in avfilter_merge_formats() detected\n"); \
+ av_free(ret->fmts); \
+ av_free(ret); \
+ return NULL; \
+ } \
ret->fmts[k++] = a->fmts[i]; \
- \
- ret->nb = k; \
+ } \
} \
+ ret->nb = k; \
/* check that there was at least one common format */ \
if (!ret->nb) \
goto fail; \
@@ -77,13 +89,41 @@ do {
MERGE_REF(ret, b, fmts, type, fail); \
} while (0)
-AVFilterFormats *ff_merge_formats(AVFilterFormats *a, AVFilterFormats *b)
+AVFilterFormats *ff_merge_formats(AVFilterFormats *a, AVFilterFormats *b,
+ enum AVMediaType type)
{
AVFilterFormats *ret = NULL;
+ int i, j;
+ int alpha1=0, alpha2=0;
+ int chroma1=0, chroma2=0;
if (a == b)
return a;
+ /* Do not lose chroma or alpha in merging.
+ It happens if both lists have formats with chroma (resp. alpha), but
+ the only formats in common do not have it (e.g. YUV+gray vs.
+ RGB+gray): in that case, the merging would select the gray format,
+ possibly causing a lossy conversion elsewhere in the graph.
+ To avoid that, pretend that there are no common formats to force the
+ insertion of a conversion filter. */
+ if (type == AVMEDIA_TYPE_VIDEO)
+ for (i = 0; i < a->nb_formats; i++)
+ for (j = 0; j < b->nb_formats; j++) {
+ const AVPixFmtDescriptor *adesc = av_pix_fmt_desc_get(a->formats[i]);
+ const AVPixFmtDescriptor *bdesc = av_pix_fmt_desc_get(b->formats[j]);
+ alpha2 |= adesc->flags & bdesc->flags & AV_PIX_FMT_FLAG_ALPHA;
+ chroma2|= adesc->nb_components > 1 && bdesc->nb_components > 1;
+ if (a->formats[i] == b->formats[j]) {
+ alpha1 |= adesc->flags & AV_PIX_FMT_FLAG_ALPHA;
+ chroma1|= adesc->nb_components > 1;
+ }
+ }
+
+ // If chroma or alpha can be lost through merging then do not merge
+ if (alpha2 > alpha1 || chroma2 > chroma1)
+ return NULL;
+
MERGE_FORMATS(ret, a, b, formats, nb_formats, AVFilterFormats, fail);
return ret;
@@ -127,21 +167,81 @@ AVFilterChannelLayouts *ff_merge_channel_layouts(AVFilterChannelLayouts *a,
AVFilterChannelLayouts *b)
{
AVFilterChannelLayouts *ret = NULL;
+ unsigned a_all = a->all_layouts + a->all_counts;
+ unsigned b_all = b->all_layouts + b->all_counts;
+ int ret_max, ret_nb = 0, i, j, round;
if (a == b) return a;
- if (a->nb_channel_layouts && b->nb_channel_layouts) {
- MERGE_FORMATS(ret, a, b, channel_layouts, nb_channel_layouts,
- AVFilterChannelLayouts, fail);
- } else if (a->nb_channel_layouts) {
- MERGE_REF(a, b, channel_layouts, AVFilterChannelLayouts, fail);
- ret = a;
- } else {
+ /* Put the most generic set in a, to avoid doing everything twice */
+ if (a_all < b_all) {
+ FFSWAP(AVFilterChannelLayouts *, a, b);
+ FFSWAP(unsigned, a_all, b_all);
+ }
+ if (a_all) {
+ if (a_all == 1 && !b_all) {
+ /* keep only known layouts in b; works also for b_all = 1 */
+ for (i = j = 0; i < b->nb_channel_layouts; i++)
+ if (KNOWN(b->channel_layouts[i]))
+ b->channel_layouts[j++] = b->channel_layouts[i];
+ /* Not optimal: the unknown layouts of b may become known after
+ another merge. */
+ if (!j)
+ return NULL;
+ b->nb_channel_layouts = j;
+ }
MERGE_REF(b, a, channel_layouts, AVFilterChannelLayouts, fail);
- ret = b;
+ return b;
}
+ ret_max = a->nb_channel_layouts + b->nb_channel_layouts;
+ if (!(ret = av_mallocz(sizeof(*ret))) ||
+ !(ret->channel_layouts = av_malloc_array(ret_max,
+ sizeof(*ret->channel_layouts))))
+ goto fail;
+
+ /* a[known] intersect b[known] */
+ for (i = 0; i < a->nb_channel_layouts; i++) {
+ if (!KNOWN(a->channel_layouts[i]))
+ continue;
+ for (j = 0; j < b->nb_channel_layouts; j++) {
+ if (a->channel_layouts[i] == b->channel_layouts[j]) {
+ ret->channel_layouts[ret_nb++] = a->channel_layouts[i];
+ a->channel_layouts[i] = b->channel_layouts[j] = 0;
+ }
+ }
+ }
+ /* 1st round: a[known] intersect b[generic]
+ 2nd round: a[generic] intersect b[known] */
+ for (round = 0; round < 2; round++) {
+ for (i = 0; i < a->nb_channel_layouts; i++) {
+ uint64_t fmt = a->channel_layouts[i], bfmt;
+ if (!fmt || !KNOWN(fmt))
+ continue;
+ bfmt = FF_COUNT2LAYOUT(av_get_channel_layout_nb_channels(fmt));
+ for (j = 0; j < b->nb_channel_layouts; j++)
+ if (b->channel_layouts[j] == bfmt)
+ ret->channel_layouts[ret_nb++] = a->channel_layouts[i];
+ }
+ /* 1st round: swap to prepare 2nd round; 2nd round: put it back */
+ FFSWAP(AVFilterChannelLayouts *, a, b);
+ }
+ /* a[generic] intersect b[generic] */
+ for (i = 0; i < a->nb_channel_layouts; i++) {
+ if (KNOWN(a->channel_layouts[i]))
+ continue;
+ for (j = 0; j < b->nb_channel_layouts; j++)
+ if (a->channel_layouts[i] == b->channel_layouts[j])
+ ret->channel_layouts[ret_nb++] = a->channel_layouts[i];
+ }
+
+ ret->nb_channel_layouts = ret_nb;
+ if (!ret->nb_channel_layouts)
+ goto fail;
+ MERGE_REF(ret, a, channel_layouts, AVFilterChannelLayouts, fail);
+ MERGE_REF(ret, b, channel_layouts, AVFilterChannelLayouts, fail);
return ret;
+
fail:
if (ret) {
av_freep(&ret->refs);
@@ -155,26 +255,58 @@ int ff_fmt_is_in(int fmt, const int *fmts)
{
const int *p;
- for (p = fmts; *p != AV_PIX_FMT_NONE; p++) {
+ for (p = fmts; *p != -1; p++) {
if (fmt == *p)
return 1;
}
return 0;
}
+#define COPY_INT_LIST(list_copy, list, type) { \
+ int count = 0; \
+ if (list) \
+ for (count = 0; list[count] != -1; count++) \
+ ; \
+ list_copy = av_calloc(count+1, sizeof(type)); \
+ if (list_copy) { \
+ memcpy(list_copy, list, sizeof(type) * count); \
+ list_copy[count] = -1; \
+ } \
+}
+
+#define MAKE_FORMAT_LIST(type, field, count_field) \
+ type *formats; \
+ int count = 0; \
+ if (fmts) \
+ for (count = 0; fmts[count] != -1; count++) \
+ ; \
+ formats = av_mallocz(sizeof(*formats)); \
+ if (!formats) return NULL; \
+ formats->count_field = count; \
+ if (count) { \
+ formats->field = av_malloc_array(count, sizeof(*formats->field)); \
+ if (!formats->field) { \
+ av_free(formats); \
+ return NULL; \
+ } \
+ }
+
AVFilterFormats *ff_make_format_list(const int *fmts)
{
- AVFilterFormats *formats;
- int count;
+ MAKE_FORMAT_LIST(AVFilterFormats, formats, nb_formats);
+ while (count--)
+ formats->formats[count] = fmts[count];
- for (count = 0; fmts[count] != -1; count++)
- ;
+ return formats;
+}
- formats = av_mallocz(sizeof(*formats));
+AVFilterChannelLayouts *avfilter_make_format64_list(const int64_t *fmts)
+{
+ MAKE_FORMAT_LIST(AVFilterChannelLayouts,
+ channel_layouts, nb_channel_layouts);
if (count)
- formats->formats = av_malloc(sizeof(*formats->formats) * count);
- formats->nb_formats = count;
- memcpy(formats->formats, fmts, sizeof(*formats->formats) * count);
+ memcpy(formats->channel_layouts, fmts,
+ sizeof(*formats->channel_layouts) * count);
return formats;
}
@@ -193,17 +325,19 @@ do { \
\
(*f)->list = fmts; \
(*f)->list[(*f)->nb++] = fmt; \
- return 0; \
} while (0)
-int ff_add_format(AVFilterFormats **avff, int fmt)
+int ff_add_format(AVFilterFormats **avff, int64_t fmt)
{
ADD_FORMAT(avff, fmt, int, formats, nb_formats);
+ return 0;
}
int ff_add_channel_layout(AVFilterChannelLayouts **l, uint64_t channel_layout)
{
+ av_assert1(!(*l && (*l)->all_layouts));
ADD_FORMAT(l, channel_layout, uint64_t, channel_layouts, nb_channel_layouts);
+ return 0;
}
AVFilterFormats *ff_all_formats(enum AVMediaType type)
@@ -227,12 +361,22 @@ AVFilterFormats *ff_all_formats(enum AVMediaType type)
return ret;
}
+const int64_t avfilter_all_channel_layouts[] = {
+#include "all_channel_layouts.inc"
+ -1
+};
+
+// AVFilterFormats *avfilter_make_all_channel_layouts(void)
+// {
+// return avfilter_make_format64_list(avfilter_all_channel_layouts);
+// }
+
AVFilterFormats *ff_planar_sample_fmts(void)
{
AVFilterFormats *ret = NULL;
int fmt;
- for (fmt = 0; fmt < AV_SAMPLE_FMT_NB; fmt++)
+ for (fmt = 0; av_get_bytes_per_sample(fmt)>0; fmt++)
if (av_sample_fmt_is_planar(fmt))
ff_add_format(&ret, fmt);
@@ -248,6 +392,18 @@ AVFilterFormats *ff_all_samplerates(void)
AVFilterChannelLayouts *ff_all_channel_layouts(void)
{
AVFilterChannelLayouts *ret = av_mallocz(sizeof(*ret));
+ if (!ret)
+ return NULL;
+ ret->all_layouts = 1;
+ return ret;
+}
+
+AVFilterChannelLayouts *ff_all_channel_counts(void)
+{
+ AVFilterChannelLayouts *ret = av_mallocz(sizeof(*ret));
+ if (!ret)
+ return NULL;
+ ret->all_layouts = ret->all_counts = 1;
return ret;
}
@@ -338,13 +494,13 @@ void ff_formats_changeref(AVFilterFormats **oldref, AVFilterFormats **newref)
int count = 0, i; \
\
for (i = 0; i < ctx->nb_inputs; i++) { \
- if (ctx->inputs[i]) { \
+ if (ctx->inputs[i] && !ctx->inputs[i]->out_fmts) { \
ref(fmts, &ctx->inputs[i]->out_fmts); \
count++; \
} \
} \
for (i = 0; i < ctx->nb_outputs; i++) { \
- if (ctx->outputs[i]) { \
+ if (ctx->outputs[i] && !ctx->outputs[i]->in_fmts) { \
ref(fmts, &ctx->outputs[i]->in_fmts); \
count++; \
} \
@@ -382,7 +538,8 @@ void ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
ff_formats_ref, formats);
}
-int ff_default_query_formats(AVFilterContext *ctx)
+static int default_query_formats_common(AVFilterContext *ctx,
+ AVFilterChannelLayouts *(layouts)(void))
{
enum AVMediaType type = ctx->inputs && ctx->inputs [0] ? ctx->inputs [0]->type :
ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type :
@@ -390,9 +547,122 @@ int ff_default_query_formats(AVFilterContext *ctx)
ff_set_common_formats(ctx, ff_all_formats(type));
if (type == AVMEDIA_TYPE_AUDIO) {
- ff_set_common_channel_layouts(ctx, ff_all_channel_layouts());
+ ff_set_common_channel_layouts(ctx, layouts());
ff_set_common_samplerates(ctx, ff_all_samplerates());
}
return 0;
}
+
+int ff_default_query_formats(AVFilterContext *ctx)
+{
+ return default_query_formats_common(ctx, ff_all_channel_layouts);
+}
+
+int ff_query_formats_all(AVFilterContext *ctx)
+{
+ return default_query_formats_common(ctx, ff_all_channel_counts);
+}
+
+/* internal functions for parsing audio format arguments */
+
+int ff_parse_pixel_format(enum AVPixelFormat *ret, const char *arg, void *log_ctx)
+{
+ char *tail;
+ int pix_fmt = av_get_pix_fmt(arg);
+ if (pix_fmt == AV_PIX_FMT_NONE) {
+ pix_fmt = strtol(arg, &tail, 0);
+ if (*tail || !av_pix_fmt_desc_get(pix_fmt)) {
+ av_log(log_ctx, AV_LOG_ERROR, "Invalid pixel format '%s'\n", arg);
+ return AVERROR(EINVAL);
+ }
+ }
+ *ret = pix_fmt;
+ return 0;
+}
+
+int ff_parse_sample_format(int *ret, const char *arg, void *log_ctx)
+{
+ char *tail;
+ int sfmt = av_get_sample_fmt(arg);
+ if (sfmt == AV_SAMPLE_FMT_NONE) {
+ sfmt = strtol(arg, &tail, 0);
+ if (*tail || av_get_bytes_per_sample(sfmt)<=0) {
+ av_log(log_ctx, AV_LOG_ERROR, "Invalid sample format '%s'\n", arg);
+ return AVERROR(EINVAL);
+ }
+ }
+ *ret = sfmt;
+ return 0;
+}
+
+int ff_parse_time_base(AVRational *ret, const char *arg, void *log_ctx)
+{
+ AVRational r;
+ if(av_parse_ratio(&r, arg, INT_MAX, 0, log_ctx) < 0 ||r.num<=0 ||r.den<=0) {
+ av_log(log_ctx, AV_LOG_ERROR, "Invalid time base '%s'\n", arg);
+ return AVERROR(EINVAL);
+ }
+ *ret = r;
+ return 0;
+}
+
+int ff_parse_sample_rate(int *ret, const char *arg, void *log_ctx)
+{
+ char *tail;
+ double srate = av_strtod(arg, &tail);
+ if (*tail || srate < 1 || (int)srate != srate || srate > INT_MAX) {
+ av_log(log_ctx, AV_LOG_ERROR, "Invalid sample rate '%s'\n", arg);
+ return AVERROR(EINVAL);
+ }
+ *ret = srate;
+ return 0;
+}
+
+int ff_parse_channel_layout(int64_t *ret, int *nret, const char *arg,
+ void *log_ctx)
+{
+ char *tail;
+ int64_t chlayout, count;
+
+ if (nret) {
+ count = strtol(arg, &tail, 10);
+ if (*tail == 'c' && !tail[1] && count > 0 && count < 63) {
+ *nret = count;
+ *ret = 0;
+ return 0;
+ }
+ }
+ chlayout = av_get_channel_layout(arg);
+ if (chlayout == 0) {
+ chlayout = strtol(arg, &tail, 10);
+ if (*tail || chlayout == 0) {
+ av_log(log_ctx, AV_LOG_ERROR, "Invalid channel layout '%s'\n", arg);
+ return AVERROR(EINVAL);
+ }
+ }
+ *ret = chlayout;
+ if (nret)
+ *nret = av_get_channel_layout_nb_channels(chlayout);
+ return 0;
+}
+
+#ifdef TEST
+
+#undef printf
+
+int main(void)
+{
+ const int64_t *cl;
+ char buf[512];
+
+ for (cl = avfilter_all_channel_layouts; *cl != -1; cl++) {
+ av_get_channel_layout_string(buf, sizeof(buf), -1, *cl);
+ printf("%s\n", buf);
+ }
+
+ return 0;
+}
+
+#endif
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-02 20:22:38 +0000