| /* |
| * Filter layer - format negotiation |
| * Copyright (c) 2007 Bobby Bingham |
| * |
| * This file is part of FFmpeg. |
| * |
| * 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. |
| * |
| * 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 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. |
| */ |
| #define MERGE_REF(ret, a, fmts, type, fail) \ |
| do { \ |
| type ***tmp; \ |
| int i; \ |
| \ |
| if (!(tmp = av_realloc_array(ret->refs, ret->refcount + a->refcount, \ |
| sizeof(*tmp)))) \ |
| goto fail; \ |
| ret->refs = tmp; \ |
| \ |
| for (i = 0; i < a->refcount; i ++) { \ |
| ret->refs[ret->refcount] = a->refs[i]; \ |
| *ret->refs[ret->refcount++] = ret; \ |
| } \ |
| \ |
| av_freep(&a->refs); \ |
| av_freep(&a->fmts); \ |
| av_freep(&a); \ |
| } while (0) |
| |
| /** |
| * Add all formats common for a and b to ret, copy the refs and destroy |
| * a and b. |
| */ |
| #define MERGE_FORMATS(ret, a, b, fmts, nb, type, fail) \ |
| do { \ |
| int i, j, k = 0, count = FFMIN(a->nb, b->nb); \ |
| \ |
| if (!(ret = av_mallocz(sizeof(*ret)))) \ |
| goto fail; \ |
| \ |
| if (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(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; \ |
| /* check that there was at least one common format */ \ |
| if (!ret->nb) \ |
| goto fail; \ |
| \ |
| MERGE_REF(ret, a, fmts, type, fail); \ |
| MERGE_REF(ret, b, fmts, type, fail); \ |
| } while (0) |
| |
| 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; |
| fail: |
| if (ret) { |
| av_freep(&ret->refs); |
| av_freep(&ret->formats); |
| } |
| av_freep(&ret); |
| return NULL; |
| } |
| |
| AVFilterFormats *ff_merge_samplerates(AVFilterFormats *a, |
| AVFilterFormats *b) |
| { |
| AVFilterFormats *ret = NULL; |
| |
| if (a == b) return a; |
| |
| if (a->nb_formats && b->nb_formats) { |
| MERGE_FORMATS(ret, a, b, formats, nb_formats, AVFilterFormats, fail); |
| } else if (a->nb_formats) { |
| MERGE_REF(a, b, formats, AVFilterFormats, fail); |
| ret = a; |
| } else { |
| MERGE_REF(b, a, formats, AVFilterFormats, fail); |
| ret = b; |
| } |
| |
| return ret; |
| fail: |
| if (ret) { |
| av_freep(&ret->refs); |
| av_freep(&ret->formats); |
| } |
| av_freep(&ret); |
| return NULL; |
| } |
| |
| 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; |
| |
| /* 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); |
| 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); |
| av_freep(&ret->channel_layouts); |
| } |
| av_freep(&ret); |
| return NULL; |
| } |
| |
| int ff_fmt_is_in(int fmt, const int *fmts) |
| { |
| const int *p; |
| |
| for (p = fmts; *p != -1; p++) { |
| if (fmt == *p) |
| return 1; |
| } |
| return 0; |
| } |
| |
| #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_freep(&formats); \ |
| return NULL; \ |
| } \ |
| } |
| |
| AVFilterFormats *ff_make_format_list(const int *fmts) |
| { |
| MAKE_FORMAT_LIST(AVFilterFormats, formats, nb_formats); |
| while (count--) |
| formats->formats[count] = fmts[count]; |
| |
| return formats; |
| } |
| |
| AVFilterChannelLayouts *ff_make_formatu64_list(const uint64_t *fmts) |
| { |
| MAKE_FORMAT_LIST(AVFilterChannelLayouts, |
| channel_layouts, nb_channel_layouts); |
| if (count) |
| memcpy(formats->channel_layouts, fmts, |
| sizeof(*formats->channel_layouts) * count); |
| |
| return formats; |
| } |
| |
| AVFilterChannelLayouts *avfilter_make_format64_list(const int64_t *fmts) |
| { |
| MAKE_FORMAT_LIST(AVFilterChannelLayouts, |
| channel_layouts, nb_channel_layouts); |
| if (count) |
| memcpy(formats->channel_layouts, fmts, |
| sizeof(*formats->channel_layouts) * count); |
| |
| return formats; |
| } |
| |
| #define ADD_FORMAT(f, fmt, unref_fn, type, list, nb) \ |
| do { \ |
| type *fmts; \ |
| void *oldf = *f; \ |
| \ |
| if (!(*f) && !(*f = av_mallocz(sizeof(**f)))) { \ |
| unref_fn(f); \ |
| return AVERROR(ENOMEM); \ |
| } \ |
| \ |
| fmts = av_realloc_array((*f)->list, (*f)->nb + 1, \ |
| sizeof(*(*f)->list)); \ |
| if (!fmts) { \ |
| unref_fn(f); \ |
| if (!oldf) \ |
| av_freep(f); \ |
| return AVERROR(ENOMEM); \ |
| } \ |
| \ |
| (*f)->list = fmts; \ |
| (*f)->list[(*f)->nb++] = fmt; \ |
| } while (0) |
| |
| int ff_add_format(AVFilterFormats **avff, int64_t fmt) |
| { |
| ADD_FORMAT(avff, fmt, ff_formats_unref, 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, ff_channel_layouts_unref, uint64_t, channel_layouts, nb_channel_layouts); |
| return 0; |
| } |
| |
| AVFilterFormats *ff_all_formats(enum AVMediaType type) |
| { |
| AVFilterFormats *ret = NULL; |
| |
| if (type == AVMEDIA_TYPE_VIDEO) { |
| const AVPixFmtDescriptor *desc = NULL; |
| while ((desc = av_pix_fmt_desc_next(desc))) { |
| if (ff_add_format(&ret, av_pix_fmt_desc_get_id(desc)) < 0) |
| return NULL; |
| } |
| } else if (type == AVMEDIA_TYPE_AUDIO) { |
| enum AVSampleFormat fmt = 0; |
| while (av_get_sample_fmt_name(fmt)) { |
| if (ff_add_format(&ret, fmt) < 0) |
| return NULL; |
| fmt++; |
| } |
| } |
| |
| 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; av_get_bytes_per_sample(fmt)>0; fmt++) |
| if (av_sample_fmt_is_planar(fmt)) |
| if (ff_add_format(&ret, fmt) < 0) |
| return NULL; |
| |
| return ret; |
| } |
| |
| AVFilterFormats *ff_all_samplerates(void) |
| { |
| AVFilterFormats *ret = av_mallocz(sizeof(*ret)); |
| return ret; |
| } |
| |
| 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; |
| } |
| |
| #define FORMATS_REF(f, ref, unref_fn) \ |
| void *tmp; \ |
| \ |
| if (!f || !ref) \ |
| return AVERROR(ENOMEM); \ |
| \ |
| tmp = av_realloc_array(f->refs, sizeof(*f->refs), f->refcount + 1); \ |
| if (!tmp) { \ |
| unref_fn(&f); \ |
| return AVERROR(ENOMEM); \ |
| } \ |
| f->refs = tmp; \ |
| f->refs[f->refcount++] = ref; \ |
| *ref = f; \ |
| return 0 |
| |
| int ff_channel_layouts_ref(AVFilterChannelLayouts *f, AVFilterChannelLayouts **ref) |
| { |
| FORMATS_REF(f, ref, ff_channel_layouts_unref); |
| } |
| |
| int ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref) |
| { |
| FORMATS_REF(f, ref, ff_formats_unref); |
| } |
| |
| #define FIND_REF_INDEX(ref, idx) \ |
| do { \ |
| int i; \ |
| for (i = 0; i < (*ref)->refcount; i ++) \ |
| if((*ref)->refs[i] == ref) { \ |
| idx = i; \ |
| break; \ |
| } \ |
| } while (0) |
| |
| #define FORMATS_UNREF(ref, list) \ |
| do { \ |
| int idx = -1; \ |
| \ |
| if (!*ref || !(*ref)->refs) \ |
| return; \ |
| \ |
| FIND_REF_INDEX(ref, idx); \ |
| \ |
| if (idx >= 0) \ |
| memmove((*ref)->refs + idx, (*ref)->refs + idx + 1, \ |
| sizeof(*(*ref)->refs) * ((*ref)->refcount - idx - 1)); \ |
| \ |
| if(!--(*ref)->refcount) { \ |
| av_free((*ref)->list); \ |
| av_free((*ref)->refs); \ |
| av_free(*ref); \ |
| } \ |
| *ref = NULL; \ |
| } while (0) |
| |
| void ff_formats_unref(AVFilterFormats **ref) |
| { |
| FORMATS_UNREF(ref, formats); |
| } |
| |
| void ff_channel_layouts_unref(AVFilterChannelLayouts **ref) |
| { |
| FORMATS_UNREF(ref, channel_layouts); |
| } |
| |
| #define FORMATS_CHANGEREF(oldref, newref) \ |
| do { \ |
| int idx = -1; \ |
| \ |
| FIND_REF_INDEX(oldref, idx); \ |
| \ |
| if (idx >= 0) { \ |
| (*oldref)->refs[idx] = newref; \ |
| *newref = *oldref; \ |
| *oldref = NULL; \ |
| } \ |
| } while (0) |
| |
| void ff_channel_layouts_changeref(AVFilterChannelLayouts **oldref, |
| AVFilterChannelLayouts **newref) |
| { |
| FORMATS_CHANGEREF(oldref, newref); |
| } |
| |
| void ff_formats_changeref(AVFilterFormats **oldref, AVFilterFormats **newref) |
| { |
| FORMATS_CHANGEREF(oldref, newref); |
| } |
| |
| #define SET_COMMON_FORMATS(ctx, fmts, in_fmts, out_fmts, ref_fn, unref_fn, list) \ |
| int count = 0, i; \ |
| \ |
| if (!fmts) \ |
| return AVERROR(ENOMEM); \ |
| \ |
| for (i = 0; i < ctx->nb_inputs; i++) { \ |
| if (ctx->inputs[i] && !ctx->inputs[i]->out_fmts) { \ |
| int ret = ref_fn(fmts, &ctx->inputs[i]->out_fmts); \ |
| if (ret < 0) { \ |
| unref_fn(&fmts); \ |
| av_freep(&fmts->list); \ |
| av_freep(&fmts); \ |
| return ret; \ |
| } \ |
| count++; \ |
| } \ |
| } \ |
| for (i = 0; i < ctx->nb_outputs; i++) { \ |
| if (ctx->outputs[i] && !ctx->outputs[i]->in_fmts) { \ |
| int ret = ref_fn(fmts, &ctx->outputs[i]->in_fmts); \ |
| if (ret < 0) { \ |
| unref_fn(&fmts); \ |
| av_freep(&fmts->list); \ |
| av_freep(&fmts); \ |
| return ret; \ |
| } \ |
| count++; \ |
| } \ |
| } \ |
| \ |
| if (!count) { \ |
| av_freep(&fmts->list); \ |
| av_freep(&fmts->refs); \ |
| av_freep(&fmts); \ |
| } \ |
| \ |
| return 0; |
| |
| int ff_set_common_channel_layouts(AVFilterContext *ctx, |
| AVFilterChannelLayouts *layouts) |
| { |
| SET_COMMON_FORMATS(ctx, layouts, in_channel_layouts, out_channel_layouts, |
| ff_channel_layouts_ref, ff_channel_layouts_unref, channel_layouts); |
| } |
| |
| int ff_set_common_samplerates(AVFilterContext *ctx, |
| AVFilterFormats *samplerates) |
| { |
| SET_COMMON_FORMATS(ctx, samplerates, in_samplerates, out_samplerates, |
| ff_formats_ref, ff_formats_unref, formats); |
| } |
| |
| /** |
| * A helper for query_formats() which sets all links to the same list of |
| * formats. If there are no links hooked to this filter, the list of formats is |
| * freed. |
| */ |
| int ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats) |
| { |
| SET_COMMON_FORMATS(ctx, formats, in_formats, out_formats, |
| ff_formats_ref, ff_formats_unref, formats); |
| } |
| |
| static int default_query_formats_common(AVFilterContext *ctx, |
| AVFilterChannelLayouts *(layouts)(void)) |
| { |
| int ret; |
| enum AVMediaType type = ctx->inputs && ctx->inputs [0] ? ctx->inputs [0]->type : |
| ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type : |
| AVMEDIA_TYPE_VIDEO; |
| |
| ret = ff_set_common_formats(ctx, ff_all_formats(type)); |
| if (ret < 0) |
| return ret; |
| if (type == AVMEDIA_TYPE_AUDIO) { |
| ret = ff_set_common_channel_layouts(ctx, layouts()); |
| if (ret < 0) |
| return ret; |
| ret = ff_set_common_samplerates(ctx, ff_all_samplerates()); |
| if (ret < 0) |
| return ret; |
| } |
| |
| 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; |
| |
| chlayout = av_get_channel_layout(arg); |
| if (chlayout == 0) { |
| chlayout = strtol(arg, &tail, 10); |
| if (!(*tail == '\0' || *tail == 'c' && *(tail + 1) == '\0') || chlayout <= 0 || chlayout > 63) { |
| av_log(log_ctx, AV_LOG_ERROR, "Invalid channel layout '%s'\n", arg); |
| return AVERROR(EINVAL); |
| } |
| if (nret) { |
| *nret = chlayout; |
| *ret = 0; |
| return 0; |
| } |
| } |
| *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]; |
| int i; |
| const char *teststrings[] ={ |
| "blah", |
| "1", |
| "2", |
| "-1", |
| "60", |
| "65", |
| "1c", |
| "2c", |
| "-1c", |
| "60c", |
| "65c", |
| "5.1", |
| "stereo", |
| "1+1+1+1", |
| "1c+1c+1c+1c", |
| "2c+1c", |
| "0x3", |
| }; |
| |
| for (cl = avfilter_all_channel_layouts; *cl != -1; cl++) { |
| av_get_channel_layout_string(buf, sizeof(buf), -1, *cl); |
| printf("%s\n", buf); |
| } |
| |
| for ( i = 0; i<FF_ARRAY_ELEMS(teststrings); i++) { |
| int64_t layout = -1; |
| int count = -1; |
| int ret; |
| ret = ff_parse_channel_layout(&layout, &count, teststrings[i], NULL); |
| |
| printf ("%d = ff_parse_channel_layout(%016"PRIX64", %2d, %s);\n", ret ? -1 : 0, layout, count, teststrings[i]); |
| } |
| |
| return 0; |
| } |
| |
| #endif |
| |
