yading@10: /*
yading@10:  * Filter layer - format negotiation
yading@10:  * Copyright (c) 2007 Bobby Bingham
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: #include "libavutil/avassert.h"
yading@10: #include "libavutil/channel_layout.h"
yading@10: #include "libavutil/common.h"
yading@10: #include "libavutil/eval.h"
yading@10: #include "libavutil/pixdesc.h"
yading@10: #include "libavutil/parseutils.h"
yading@10: #include "avfilter.h"
yading@10: #include "internal.h"
yading@10: #include "formats.h"
yading@10: 
yading@10: #define KNOWN(l) (!FF_LAYOUT2COUNT(l)) /* for readability */
yading@10: 
yading@10: /**
yading@10:  * Add all refs from a to ret and destroy a.
yading@10:  */
yading@10: #define MERGE_REF(ret, a, fmts, type, fail)                                \
yading@10: do {                                                                       \
yading@10:     type ***tmp;                                                           \
yading@10:     int i;                                                                 \
yading@10:                                                                            \
yading@10:     if (!(tmp = av_realloc(ret->refs,                                      \
yading@10:                            sizeof(*tmp) * (ret->refcount + a->refcount)))) \
yading@10:         goto fail;                                                         \
yading@10:     ret->refs = tmp;                                                       \
yading@10:                                                                            \
yading@10:     for (i = 0; i < a->refcount; i ++) {                                   \
yading@10:         ret->refs[ret->refcount] = a->refs[i];                             \
yading@10:         *ret->refs[ret->refcount++] = ret;                                 \
yading@10:     }                                                                      \
yading@10:                                                                            \
yading@10:     av_freep(&a->refs);                                                    \
yading@10:     av_freep(&a->fmts);                                                    \
yading@10:     av_freep(&a);                                                          \
yading@10: } while (0)
yading@10: 
yading@10: /**
yading@10:  * Add all formats common for a and b to ret, copy the refs and destroy
yading@10:  * a and b.
yading@10:  */
yading@10: #define MERGE_FORMATS(ret, a, b, fmts, nb, type, fail)                          \
yading@10: do {                                                                            \
yading@10:     int i, j, k = 0, count = FFMIN(a->nb, b->nb);                               \
yading@10:                                                                                 \
yading@10:     if (!(ret = av_mallocz(sizeof(*ret))))                                      \
yading@10:         goto fail;                                                              \
yading@10:                                                                                 \
yading@10:     if (count) {                                                                \
yading@10:         if (!(ret->fmts = av_malloc(sizeof(*ret->fmts) * count)))               \
yading@10:             goto fail;                                                          \
yading@10:         for (i = 0; i < a->nb; i++)                                             \
yading@10:             for (j = 0; j < b->nb; j++)                                         \
yading@10:                 if (a->fmts[i] == b->fmts[j]) {                                 \
yading@10:                     if(k >= FFMIN(a->nb, b->nb)){                               \
yading@10:                         av_log(NULL, AV_LOG_ERROR, "Duplicate formats in avfilter_merge_formats() detected\n"); \
yading@10:                         av_free(ret->fmts);                                     \
yading@10:                         av_free(ret);                                           \
yading@10:                         return NULL;                                            \
yading@10:                     }                                                           \
yading@10:                     ret->fmts[k++] = a->fmts[i];                                \
yading@10:                 }                                                               \
yading@10:     }                                                                           \
yading@10:     ret->nb = k;                                                                \
yading@10:     /* check that there was at least one common format */                       \
yading@10:     if (!ret->nb)                                                               \
yading@10:         goto fail;                                                              \
yading@10:                                                                                 \
yading@10:     MERGE_REF(ret, a, fmts, type, fail);                                        \
yading@10:     MERGE_REF(ret, b, fmts, type, fail);                                        \
yading@10: } while (0)
yading@10: 
yading@10: AVFilterFormats *ff_merge_formats(AVFilterFormats *a, AVFilterFormats *b,
yading@10:                                   enum AVMediaType type)
yading@10: {
yading@10:     AVFilterFormats *ret = NULL;
yading@10:     int i, j;
yading@10:     int alpha1=0, alpha2=0;
yading@10:     int chroma1=0, chroma2=0;
yading@10: 
yading@10:     if (a == b)
yading@10:         return a;
yading@10: 
yading@10:     /* Do not lose chroma or alpha in merging.
yading@10:        It happens if both lists have formats with chroma (resp. alpha), but
yading@10:        the only formats in common do not have it (e.g. YUV+gray vs.
yading@10:        RGB+gray): in that case, the merging would select the gray format,
yading@10:        possibly causing a lossy conversion elsewhere in the graph.
yading@10:        To avoid that, pretend that there are no common formats to force the
yading@10:        insertion of a conversion filter. */
yading@10:     if (type == AVMEDIA_TYPE_VIDEO)
yading@10:         for (i = 0; i < a->format_count; i++)
yading@10:             for (j = 0; j < b->format_count; j++) {
yading@10:                 const AVPixFmtDescriptor *adesc = av_pix_fmt_desc_get(a->formats[i]);
yading@10:                 const AVPixFmtDescriptor *bdesc = av_pix_fmt_desc_get(b->formats[j]);
yading@10:                 alpha2 |= adesc->flags & bdesc->flags & PIX_FMT_ALPHA;
yading@10:                 chroma2|= adesc->nb_components > 1 && bdesc->nb_components > 1;
yading@10:                 if (a->formats[i] == b->formats[j]) {
yading@10:                     alpha1 |= adesc->flags & PIX_FMT_ALPHA;
yading@10:                     chroma1|= adesc->nb_components > 1;
yading@10:                 }
yading@10:             }
yading@10: 
yading@10:     // If chroma or alpha can be lost through merging then do not merge
yading@10:     if (alpha2 > alpha1 || chroma2 > chroma1)
yading@10:         return NULL;
yading@10: 
yading@10:     MERGE_FORMATS(ret, a, b, formats, format_count, AVFilterFormats, fail);
yading@10: 
yading@10:     return ret;
yading@10: fail:
yading@10:     if (ret) {
yading@10:         av_freep(&ret->refs);
yading@10:         av_freep(&ret->formats);
yading@10:     }
yading@10:     av_freep(&ret);
yading@10:     return NULL;
yading@10: }
yading@10: 
yading@10: AVFilterFormats *ff_merge_samplerates(AVFilterFormats *a,
yading@10:                                       AVFilterFormats *b)
yading@10: {
yading@10:     AVFilterFormats *ret = NULL;
yading@10: 
yading@10:     if (a == b) return a;
yading@10: 
yading@10:     if (a->format_count && b->format_count) {
yading@10:         MERGE_FORMATS(ret, a, b, formats, format_count, AVFilterFormats, fail);
yading@10:     } else if (a->format_count) {
yading@10:         MERGE_REF(a, b, formats, AVFilterFormats, fail);
yading@10:         ret = a;
yading@10:     } else {
yading@10:         MERGE_REF(b, a, formats, AVFilterFormats, fail);
yading@10:         ret = b;
yading@10:     }
yading@10: 
yading@10:     return ret;
yading@10: fail:
yading@10:     if (ret) {
yading@10:         av_freep(&ret->refs);
yading@10:         av_freep(&ret->formats);
yading@10:     }
yading@10:     av_freep(&ret);
yading@10:     return NULL;
yading@10: }
yading@10: 
yading@10: AVFilterChannelLayouts *ff_merge_channel_layouts(AVFilterChannelLayouts *a,
yading@10:                                                  AVFilterChannelLayouts *b)
yading@10: {
yading@10:     AVFilterChannelLayouts *ret = NULL;
yading@10:     unsigned a_all = a->all_layouts + a->all_counts;
yading@10:     unsigned b_all = b->all_layouts + b->all_counts;
yading@10:     int ret_max, ret_nb = 0, i, j, round;
yading@10: 
yading@10:     if (a == b) return a;
yading@10: 
yading@10:     /* Put the most generic set in a, to avoid doing everything twice */
yading@10:     if (a_all < b_all) {
yading@10:         FFSWAP(AVFilterChannelLayouts *, a, b);
yading@10:         FFSWAP(unsigned, a_all, b_all);
yading@10:     }
yading@10:     if (a_all) {
yading@10:         if (a_all == 1 && !b_all) {
yading@10:             /* keep only known layouts in b; works also for b_all = 1 */
yading@10:             for (i = j = 0; i < b->nb_channel_layouts; i++)
yading@10:                 if (KNOWN(b->channel_layouts[i]))
yading@10:                     b->channel_layouts[j++] = b->channel_layouts[i];
yading@10:             /* Not optimal: the unknown layouts of b may become known after
yading@10:                another merge. */
yading@10:             if (!j)
yading@10:                 return NULL;
yading@10:             b->nb_channel_layouts = j;
yading@10:         }
yading@10:         MERGE_REF(b, a, channel_layouts, AVFilterChannelLayouts, fail);
yading@10:         return b;
yading@10:     }
yading@10: 
yading@10:     ret_max = a->nb_channel_layouts + b->nb_channel_layouts;
yading@10:     if (!(ret = av_mallocz(sizeof(*ret))) ||
yading@10:         !(ret->channel_layouts = av_malloc(sizeof(*ret->channel_layouts) *
yading@10:                                            ret_max)))
yading@10:         goto fail;
yading@10: 
yading@10:     /* a[known] intersect b[known] */
yading@10:     for (i = 0; i < a->nb_channel_layouts; i++) {
yading@10:         if (!KNOWN(a->channel_layouts[i]))
yading@10:             continue;
yading@10:         for (j = 0; j < b->nb_channel_layouts; j++) {
yading@10:             if (a->channel_layouts[i] == b->channel_layouts[j]) {
yading@10:                 ret->channel_layouts[ret_nb++] = a->channel_layouts[i];
yading@10:                 a->channel_layouts[i] = b->channel_layouts[j] = 0;
yading@10:             }
yading@10:         }
yading@10:     }
yading@10:     /* 1st round: a[known] intersect b[generic]
yading@10:        2nd round: a[generic] intersect b[known] */
yading@10:     for (round = 0; round < 2; round++) {
yading@10:         for (i = 0; i < a->nb_channel_layouts; i++) {
yading@10:             uint64_t fmt = a->channel_layouts[i], bfmt;
yading@10:             if (!fmt || !KNOWN(fmt))
yading@10:                 continue;
yading@10:             bfmt = FF_COUNT2LAYOUT(av_get_channel_layout_nb_channels(fmt));
yading@10:             for (j = 0; j < b->nb_channel_layouts; j++)
yading@10:                 if (b->channel_layouts[j] == bfmt)
yading@10:                     ret->channel_layouts[ret_nb++] = a->channel_layouts[i];
yading@10:         }
yading@10:         /* 1st round: swap to prepare 2nd round; 2nd round: put it back */
yading@10:         FFSWAP(AVFilterChannelLayouts *, a, b);
yading@10:     }
yading@10:     /* a[generic] intersect b[generic] */
yading@10:     for (i = 0; i < a->nb_channel_layouts; i++) {
yading@10:         if (KNOWN(a->channel_layouts[i]))
yading@10:             continue;
yading@10:         for (j = 0; j < b->nb_channel_layouts; j++)
yading@10:             if (a->channel_layouts[i] == b->channel_layouts[j])
yading@10:                 ret->channel_layouts[ret_nb++] = a->channel_layouts[i];
yading@10:     }
yading@10: 
yading@10:     ret->nb_channel_layouts = ret_nb;
yading@10:     if (!ret->nb_channel_layouts)
yading@10:         goto fail;
yading@10:     MERGE_REF(ret, a, channel_layouts, AVFilterChannelLayouts, fail);
yading@10:     MERGE_REF(ret, b, channel_layouts, AVFilterChannelLayouts, fail);
yading@10:     return ret;
yading@10: 
yading@10: fail:
yading@10:     if (ret) {
yading@10:         av_freep(&ret->refs);
yading@10:         av_freep(&ret->channel_layouts);
yading@10:     }
yading@10:     av_freep(&ret);
yading@10:     return NULL;
yading@10: }
yading@10: 
yading@10: int ff_fmt_is_in(int fmt, const int *fmts)
yading@10: {
yading@10:     const int *p;
yading@10: 
yading@10:     for (p = fmts; *p != -1; p++) {
yading@10:         if (fmt == *p)
yading@10:             return 1;
yading@10:     }
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: #define COPY_INT_LIST(list_copy, list, type) {                          \
yading@10:     int count = 0;                                                      \
yading@10:     if (list)                                                           \
yading@10:         for (count = 0; list[count] != -1; count++)                     \
yading@10:             ;                                                           \
yading@10:     list_copy = av_calloc(count+1, sizeof(type));                       \
yading@10:     if (list_copy) {                                                    \
yading@10:         memcpy(list_copy, list, sizeof(type) * count);                  \
yading@10:         list_copy[count] = -1;                                          \
yading@10:     }                                                                   \
yading@10: }
yading@10: 
yading@10: int *ff_copy_int_list(const int * const list)
yading@10: {
yading@10:     int *ret = NULL;
yading@10:     COPY_INT_LIST(ret, list, int);
yading@10:     return ret;
yading@10: }
yading@10: 
yading@10: int64_t *ff_copy_int64_list(const int64_t * const list)
yading@10: {
yading@10:     int64_t *ret = NULL;
yading@10:     COPY_INT_LIST(ret, list, int64_t);
yading@10:     return ret;
yading@10: }
yading@10: 
yading@10: #define MAKE_FORMAT_LIST(type, field, count_field)                      \
yading@10:     type *formats;                                                      \
yading@10:     int count = 0;                                                      \
yading@10:     if (fmts)                                                           \
yading@10:         for (count = 0; fmts[count] != -1; count++)                     \
yading@10:             ;                                                           \
yading@10:     formats = av_mallocz(sizeof(*formats));                             \
yading@10:     if (!formats) return NULL;                                          \
yading@10:     formats->count_field = count;                                       \
yading@10:     if (count) {                                                        \
yading@10:         formats->field = av_malloc(sizeof(*formats->field)*count);      \
yading@10:         if (!formats->field) {                                          \
yading@10:             av_free(formats);                                           \
yading@10:             return NULL;                                                \
yading@10:         }                                                               \
yading@10:     }
yading@10: 
yading@10: AVFilterFormats *ff_make_format_list(const int *fmts)
yading@10: {
yading@10:     MAKE_FORMAT_LIST(AVFilterFormats, formats, format_count);
yading@10:     while (count--)
yading@10:         formats->formats[count] = fmts[count];
yading@10: 
yading@10:     return formats;
yading@10: }
yading@10: 
yading@10: AVFilterChannelLayouts *avfilter_make_format64_list(const int64_t *fmts)
yading@10: {
yading@10:     MAKE_FORMAT_LIST(AVFilterChannelLayouts,
yading@10:                      channel_layouts, nb_channel_layouts);
yading@10:     if (count)
yading@10:         memcpy(formats->channel_layouts, fmts,
yading@10:                sizeof(*formats->channel_layouts) * count);
yading@10: 
yading@10:     return formats;
yading@10: }
yading@10: 
yading@10: #define ADD_FORMAT(f, fmt, type, list, nb)                  \
yading@10: do {                                                        \
yading@10:     type *fmts;                                             \
yading@10:                                                             \
yading@10:     if (!(*f) && !(*f = av_mallocz(sizeof(**f))))           \
yading@10:         return AVERROR(ENOMEM);                             \
yading@10:                                                             \
yading@10:     fmts = av_realloc((*f)->list,                           \
yading@10:                       sizeof(*(*f)->list) * ((*f)->nb + 1));\
yading@10:     if (!fmts)                                              \
yading@10:         return AVERROR(ENOMEM);                             \
yading@10:                                                             \
yading@10:     (*f)->list = fmts;                                      \
yading@10:     (*f)->list[(*f)->nb++] = fmt;                           \
yading@10: } while (0)
yading@10: 
yading@10: int ff_add_format(AVFilterFormats **avff, int64_t fmt)
yading@10: {
yading@10:     ADD_FORMAT(avff, fmt, int, formats, format_count);
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: int ff_add_channel_layout(AVFilterChannelLayouts **l, uint64_t channel_layout)
yading@10: {
yading@10:     av_assert1(!(*l && (*l)->all_layouts));
yading@10:     ADD_FORMAT(l, channel_layout, uint64_t, channel_layouts, nb_channel_layouts);
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: AVFilterFormats *ff_all_formats(enum AVMediaType type)
yading@10: {
yading@10:     AVFilterFormats *ret = NULL;
yading@10:     int fmt;
yading@10:     int num_formats = type == AVMEDIA_TYPE_VIDEO ? AV_PIX_FMT_NB    :
yading@10:                       type == AVMEDIA_TYPE_AUDIO ? AV_SAMPLE_FMT_NB : 0;
yading@10: 
yading@10:     for (fmt = 0; fmt < num_formats; fmt++) {
yading@10:         const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
yading@10:         if ((type != AVMEDIA_TYPE_VIDEO) ||
yading@10:             (type == AVMEDIA_TYPE_VIDEO && !(desc->flags & PIX_FMT_HWACCEL)))
yading@10:             ff_add_format(&ret, fmt);
yading@10:     }
yading@10: 
yading@10:     return ret;
yading@10: }
yading@10: 
yading@10: const int64_t avfilter_all_channel_layouts[] = {
yading@10: #include "all_channel_layouts.inc"
yading@10:     -1
yading@10: };
yading@10: 
yading@10: // AVFilterFormats *avfilter_make_all_channel_layouts(void)
yading@10: // {
yading@10: //     return avfilter_make_format64_list(avfilter_all_channel_layouts);
yading@10: // }
yading@10: 
yading@10: AVFilterFormats *ff_planar_sample_fmts(void)
yading@10: {
yading@10:     AVFilterFormats *ret = NULL;
yading@10:     int fmt;
yading@10: 
yading@10:     for (fmt = 0; fmt < AV_SAMPLE_FMT_NB; fmt++)
yading@10:         if (av_sample_fmt_is_planar(fmt))
yading@10:             ff_add_format(&ret, fmt);
yading@10: 
yading@10:     return ret;
yading@10: }
yading@10: 
yading@10: AVFilterFormats *ff_all_samplerates(void)
yading@10: {
yading@10:     AVFilterFormats *ret = av_mallocz(sizeof(*ret));
yading@10:     return ret;
yading@10: }
yading@10: 
yading@10: AVFilterChannelLayouts *ff_all_channel_layouts(void)
yading@10: {
yading@10:     AVFilterChannelLayouts *ret = av_mallocz(sizeof(*ret));
yading@10:     if (!ret)
yading@10:         return NULL;
yading@10:     ret->all_layouts = 1;
yading@10:     return ret;
yading@10: }
yading@10: 
yading@10: AVFilterChannelLayouts *ff_all_channel_counts(void)
yading@10: {
yading@10:     AVFilterChannelLayouts *ret = av_mallocz(sizeof(*ret));
yading@10:     if (!ret)
yading@10:         return NULL;
yading@10:     ret->all_layouts = ret->all_counts = 1;
yading@10:     return ret;
yading@10: }
yading@10: 
yading@10: #define FORMATS_REF(f, ref)                                          \
yading@10: do {                                                                 \
yading@10:     *ref = f;                                                        \
yading@10:     f->refs = av_realloc(f->refs, sizeof(*f->refs) * ++f->refcount); \
yading@10:     f->refs[f->refcount-1] = ref;                                    \
yading@10: } while (0)
yading@10: 
yading@10: void ff_channel_layouts_ref(AVFilterChannelLayouts *f, AVFilterChannelLayouts **ref)
yading@10: {
yading@10:     FORMATS_REF(f, ref);
yading@10: }
yading@10: 
yading@10: void ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
yading@10: {
yading@10:     FORMATS_REF(f, ref);
yading@10: }
yading@10: 
yading@10: #define FIND_REF_INDEX(ref, idx)            \
yading@10: do {                                        \
yading@10:     int i;                                  \
yading@10:     for (i = 0; i < (*ref)->refcount; i ++) \
yading@10:         if((*ref)->refs[i] == ref) {        \
yading@10:             idx = i;                        \
yading@10:             break;                          \
yading@10:         }                                   \
yading@10: } while (0)
yading@10: 
yading@10: #define FORMATS_UNREF(ref, list)                                   \
yading@10: do {                                                               \
yading@10:     int idx = -1;                                                  \
yading@10:                                                                    \
yading@10:     if (!*ref)                                                     \
yading@10:         return;                                                    \
yading@10:                                                                    \
yading@10:     FIND_REF_INDEX(ref, idx);                                      \
yading@10:                                                                    \
yading@10:     if (idx >= 0)                                                  \
yading@10:         memmove((*ref)->refs + idx, (*ref)->refs + idx + 1,        \
yading@10:             sizeof(*(*ref)->refs) * ((*ref)->refcount - idx - 1)); \
yading@10:                                                                    \
yading@10:     if(!--(*ref)->refcount) {                                      \
yading@10:         av_free((*ref)->list);                                     \
yading@10:         av_free((*ref)->refs);                                     \
yading@10:         av_free(*ref);                                             \
yading@10:     }                                                              \
yading@10:     *ref = NULL;                                                   \
yading@10: } while (0)
yading@10: 
yading@10: void ff_formats_unref(AVFilterFormats **ref)
yading@10: {
yading@10:     FORMATS_UNREF(ref, formats);
yading@10: }
yading@10: 
yading@10: void ff_channel_layouts_unref(AVFilterChannelLayouts **ref)
yading@10: {
yading@10:     FORMATS_UNREF(ref, channel_layouts);
yading@10: }
yading@10: 
yading@10: #define FORMATS_CHANGEREF(oldref, newref)       \
yading@10: do {                                            \
yading@10:     int idx = -1;                               \
yading@10:                                                 \
yading@10:     FIND_REF_INDEX(oldref, idx);                \
yading@10:                                                 \
yading@10:     if (idx >= 0) {                             \
yading@10:         (*oldref)->refs[idx] = newref;          \
yading@10:         *newref = *oldref;                      \
yading@10:         *oldref = NULL;                         \
yading@10:     }                                           \
yading@10: } while (0)
yading@10: 
yading@10: void ff_channel_layouts_changeref(AVFilterChannelLayouts **oldref,
yading@10:                                   AVFilterChannelLayouts **newref)
yading@10: {
yading@10:     FORMATS_CHANGEREF(oldref, newref);
yading@10: }
yading@10: 
yading@10: void ff_formats_changeref(AVFilterFormats **oldref, AVFilterFormats **newref)
yading@10: {
yading@10:     FORMATS_CHANGEREF(oldref, newref);
yading@10: }
yading@10: 
yading@10: #define SET_COMMON_FORMATS(ctx, fmts, in_fmts, out_fmts, ref, list) \
yading@10: {                                                                   \
yading@10:     int count = 0, i;                                               \
yading@10:                                                                     \
yading@10:     for (i = 0; i < ctx->nb_inputs; i++) {                          \
yading@10:         if (ctx->inputs[i] && !ctx->inputs[i]->out_fmts) {          \
yading@10:             ref(fmts, &ctx->inputs[i]->out_fmts);                   \
yading@10:             count++;                                                \
yading@10:         }                                                           \
yading@10:     }                                                               \
yading@10:     for (i = 0; i < ctx->nb_outputs; i++) {                         \
yading@10:         if (ctx->outputs[i] && !ctx->outputs[i]->in_fmts) {         \
yading@10:             ref(fmts, &ctx->outputs[i]->in_fmts);                   \
yading@10:             count++;                                                \
yading@10:         }                                                           \
yading@10:     }                                                               \
yading@10:                                                                     \
yading@10:     if (!count) {                                                   \
yading@10:         av_freep(&fmts->list);                                      \
yading@10:         av_freep(&fmts->refs);                                      \
yading@10:         av_freep(&fmts);                                            \
yading@10:     }                                                               \
yading@10: }
yading@10: 
yading@10: void ff_set_common_channel_layouts(AVFilterContext *ctx,
yading@10:                                    AVFilterChannelLayouts *layouts)
yading@10: {
yading@10:     SET_COMMON_FORMATS(ctx, layouts, in_channel_layouts, out_channel_layouts,
yading@10:                        ff_channel_layouts_ref, channel_layouts);
yading@10: }
yading@10: 
yading@10: void ff_set_common_samplerates(AVFilterContext *ctx,
yading@10:                                AVFilterFormats *samplerates)
yading@10: {
yading@10:     SET_COMMON_FORMATS(ctx, samplerates, in_samplerates, out_samplerates,
yading@10:                        ff_formats_ref, formats);
yading@10: }
yading@10: 
yading@10: /**
yading@10:  * A helper for query_formats() which sets all links to the same list of
yading@10:  * formats. If there are no links hooked to this filter, the list of formats is
yading@10:  * freed.
yading@10:  */
yading@10: void ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
yading@10: {
yading@10:     SET_COMMON_FORMATS(ctx, formats, in_formats, out_formats,
yading@10:                        ff_formats_ref, formats);
yading@10: }
yading@10: 
yading@10: static int default_query_formats_common(AVFilterContext *ctx,
yading@10:                                         AVFilterChannelLayouts *(layouts)(void))
yading@10: {
yading@10:     enum AVMediaType type = ctx->inputs  && ctx->inputs [0] ? ctx->inputs [0]->type :
yading@10:                             ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type :
yading@10:                             AVMEDIA_TYPE_VIDEO;
yading@10: 
yading@10:     ff_set_common_formats(ctx, ff_all_formats(type));
yading@10:     if (type == AVMEDIA_TYPE_AUDIO) {
yading@10:         ff_set_common_channel_layouts(ctx, layouts());
yading@10:         ff_set_common_samplerates(ctx, ff_all_samplerates());
yading@10:     }
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: int ff_default_query_formats(AVFilterContext *ctx)
yading@10: {
yading@10:     return default_query_formats_common(ctx, ff_all_channel_layouts);
yading@10: }
yading@10: 
yading@10: int ff_query_formats_all(AVFilterContext *ctx)
yading@10: {
yading@10:     return default_query_formats_common(ctx, ff_all_channel_counts);
yading@10: }
yading@10: 
yading@10: /* internal functions for parsing audio format arguments */
yading@10: 
yading@10: int ff_parse_pixel_format(enum AVPixelFormat *ret, const char *arg, void *log_ctx)
yading@10: {
yading@10:     char *tail;
yading@10:     int pix_fmt = av_get_pix_fmt(arg);
yading@10:     if (pix_fmt == AV_PIX_FMT_NONE) {
yading@10:         pix_fmt = strtol(arg, &tail, 0);
yading@10:         if (*tail || (unsigned)pix_fmt >= AV_PIX_FMT_NB) {
yading@10:             av_log(log_ctx, AV_LOG_ERROR, "Invalid pixel format '%s'\n", arg);
yading@10:             return AVERROR(EINVAL);
yading@10:         }
yading@10:     }
yading@10:     *ret = pix_fmt;
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: int ff_parse_sample_format(int *ret, const char *arg, void *log_ctx)
yading@10: {
yading@10:     char *tail;
yading@10:     int sfmt = av_get_sample_fmt(arg);
yading@10:     if (sfmt == AV_SAMPLE_FMT_NONE) {
yading@10:         sfmt = strtol(arg, &tail, 0);
yading@10:         if (*tail || (unsigned)sfmt >= AV_SAMPLE_FMT_NB) {
yading@10:             av_log(log_ctx, AV_LOG_ERROR, "Invalid sample format '%s'\n", arg);
yading@10:             return AVERROR(EINVAL);
yading@10:         }
yading@10:     }
yading@10:     *ret = sfmt;
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: int ff_parse_time_base(AVRational *ret, const char *arg, void *log_ctx)
yading@10: {
yading@10:     AVRational r;
yading@10:     if(av_parse_ratio(&r, arg, INT_MAX, 0, log_ctx) < 0 ||r.num<=0  ||r.den<=0) {
yading@10:         av_log(log_ctx, AV_LOG_ERROR, "Invalid time base '%s'\n", arg);
yading@10:         return AVERROR(EINVAL);
yading@10:     }
yading@10:     *ret = r;
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: int ff_parse_sample_rate(int *ret, const char *arg, void *log_ctx)
yading@10: {
yading@10:     char *tail;
yading@10:     double srate = av_strtod(arg, &tail);
yading@10:     if (*tail || srate < 1 || (int)srate != srate || srate > INT_MAX) {
yading@10:         av_log(log_ctx, AV_LOG_ERROR, "Invalid sample rate '%s'\n", arg);
yading@10:         return AVERROR(EINVAL);
yading@10:     }
yading@10:     *ret = srate;
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: int ff_parse_channel_layout(int64_t *ret, const char *arg, void *log_ctx)
yading@10: {
yading@10:     char *tail;
yading@10:     int64_t chlayout = av_get_channel_layout(arg);
yading@10:     if (chlayout == 0) {
yading@10:         chlayout = strtol(arg, &tail, 10);
yading@10:         if (*tail || chlayout == 0) {
yading@10:             av_log(log_ctx, AV_LOG_ERROR, "Invalid channel layout '%s'\n", arg);
yading@10:             return AVERROR(EINVAL);
yading@10:         }
yading@10:     }
yading@10:     *ret = chlayout;
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: #ifdef TEST
yading@10: 
yading@10: #undef printf
yading@10: 
yading@10: int main(void)
yading@10: {
yading@10:     const int64_t *cl;
yading@10:     char buf[512];
yading@10: 
yading@10:     for (cl = avfilter_all_channel_layouts; *cl != -1; cl++) {
yading@10:         av_get_channel_layout_string(buf, sizeof(buf), -1, *cl);
yading@10:         printf("%s\n", buf);
yading@10:     }
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: #endif
yading@10: