diff options
Diffstat (limited to 'contrib/ffmpeg/libavfilter')
| -rw-r--r-- | contrib/ffmpeg/libavfilter/allfilters.c | 43 | ||||
| -rw-r--r-- | contrib/ffmpeg/libavfilter/avfilter.c | 390 | ||||
| -rw-r--r-- | contrib/ffmpeg/libavfilter/avfilter.h | 616 | ||||
| -rw-r--r-- | contrib/ffmpeg/libavfilter/defaults.c | 158 | ||||
| -rw-r--r-- | contrib/ffmpeg/libavfilter/formats.c | 148 |
5 files changed, 1355 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavfilter/allfilters.c b/contrib/ffmpeg/libavfilter/allfilters.c new file mode 100644 index 000000000..fafd6d1c6 --- /dev/null +++ b/contrib/ffmpeg/libavfilter/allfilters.c @@ -0,0 +1,43 @@ +/* + * filter registration + * copyright (c) 2008 Vitor Sessak + * + * 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 "avfilter.h" + +#define REGISTER_VF(X,x) { \ + extern AVFilter avfilter_vf_##x ; \ + if(ENABLE_VF_##X ) avfilter_register(&avfilter_vf_##x ); } + + +#define REGISTER_VSRC(X,x) { \ + extern AVFilter avfilter_vsrc_##x ; \ + if(ENABLE_VSRC_##X ) avfilter_register(&avfilter_vsrc_##x ); } + +void avfilter_register_all(void) +{ + static int initialized; + + if (initialized) + return; + initialized = 1; + +// REGISTER_VF(CROP,crop); + +} diff --git a/contrib/ffmpeg/libavfilter/avfilter.c b/contrib/ffmpeg/libavfilter/avfilter.c new file mode 100644 index 000000000..0182e4701 --- /dev/null +++ b/contrib/ffmpeg/libavfilter/avfilter.c @@ -0,0 +1,390 @@ +/* + * filter layer + * 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 "avfilter.h" +#include "imgconvert.h" + +/** list of registered filters */ +struct FilterList +{ + AVFilter *filter; + struct FilterList *next; +} *filters = NULL; + +/** helper macros to get the in/out pad on the dst/src filter */ +#define link_dpad(link) link->dst-> input_pads[link->dstpad] +#define link_spad(link) link->src->output_pads[link->srcpad] + +AVFilterPicRef *avfilter_ref_pic(AVFilterPicRef *ref, int pmask) +{ + AVFilterPicRef *ret = av_malloc(sizeof(AVFilterPicRef)); + *ret = *ref; + ret->perms &= pmask; + ret->pic->refcount ++; + return ret; +} + +void avfilter_unref_pic(AVFilterPicRef *ref) +{ + if(!(--ref->pic->refcount)) + ref->pic->free(ref->pic); + av_free(ref); +} + +void avfilter_insert_pad(unsigned idx, unsigned *count, size_t padidx_off, + AVFilterPad **pads, AVFilterLink ***links, + AVFilterPad *newpad) +{ + unsigned i; + + idx = FFMIN(idx, *count); + + *pads = av_realloc(*pads, sizeof(AVFilterPad) * (*count + 1)); + *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1)); + memmove(*pads +idx+1, *pads +idx, sizeof(AVFilterPad) * (*count-idx)); + memmove(*links+idx+1, *links+idx, sizeof(AVFilterLink*) * (*count-idx)); + memcpy(*pads+idx, newpad, sizeof(AVFilterPad)); + (*links)[idx] = NULL; + + (*count) ++; + for(i = idx+1; i < *count; i ++) + if(*links[i]) + (*(unsigned *)((uint8_t *) *links[i] + padidx_off)) ++; +} + +int avfilter_link(AVFilterContext *src, unsigned srcpad, + AVFilterContext *dst, unsigned dstpad) +{ + AVFilterLink *link; + + if(src->output_count <= srcpad || dst->input_count <= dstpad || + src->outputs[srcpad] || dst->inputs[dstpad]) + return -1; + + src->outputs[srcpad] = + dst-> inputs[dstpad] = link = av_mallocz(sizeof(AVFilterLink)); + + link->src = src; + link->dst = dst; + link->srcpad = srcpad; + link->dstpad = dstpad; + link->format = -1; + + return 0; +} + +int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt, + unsigned in, unsigned out) +{ + av_log(link->dst, AV_LOG_INFO, "auto-inserting filter '%s'\n", + filt->filter->name); + + link->dst->inputs[link->dstpad] = NULL; + if(avfilter_link(filt, out, link->dst, link->dstpad)) { + /* failed to link output filter to new filter */ + link->dst->inputs[link->dstpad] = link; + return -1; + } + + /* re-hookup the link to the new destination filter we inserted */ + link->dst = filt; + link->dstpad = in; + filt->inputs[in] = link; + + /* if any information on supported colorspaces already exists on the + * link, we need to preserve that */ + if(link->out_formats) + avfilter_formats_changeref(&link->out_formats, + &filt->outputs[out]->out_formats); + + return 0; +} + +int avfilter_config_links(AVFilterContext *filter) +{ + int (*config_link)(AVFilterLink *); + unsigned i; + + for(i = 0; i < filter->input_count; i ++) { + AVFilterLink *link = filter->inputs[i]; + + if(!link) continue; + + switch(link->init_state) { + case AVLINK_INIT: + continue; + case AVLINK_STARTINIT: + av_log(filter, AV_LOG_INFO, "circular filter chain detected\n"); + return 0; + case AVLINK_UNINIT: + link->init_state = AVLINK_STARTINIT; + + if(avfilter_config_links(link->src)) + return -1; + + if(!(config_link = link_spad(link).config_props)) + config_link = avfilter_default_config_output_link; + if(config_link(link)) + return -1; + + if((config_link = link_dpad(link).config_props)) + if(config_link(link)) + return -1; + + link->init_state = AVLINK_INIT; + } + } + + return 0; +} + +AVFilterPicRef *avfilter_get_video_buffer(AVFilterLink *link, int perms) +{ + AVFilterPicRef *ret = NULL; + + if(link_dpad(link).get_video_buffer) + ret = link_dpad(link).get_video_buffer(link, perms); + + if(!ret) + ret = avfilter_default_get_video_buffer(link, perms); + + return ret; +} + +int avfilter_request_frame(AVFilterLink *link) +{ + if(link_spad(link).request_frame) + return link_spad(link).request_frame(link); + else if(link->src->inputs[0]) + return avfilter_request_frame(link->src->inputs[0]); + else return -1; +} + +int avfilter_poll_frame(AVFilterLink *link) +{ + int i, min=INT_MAX; + + if(link_spad(link).poll_frame) + return link_spad(link).poll_frame(link); + + for (i=0; i<link->src->input_count; i++) { + if(!link->src->inputs[i]) + return -1; + min = FFMIN(min, avfilter_poll_frame(link->src->inputs[i])); + } + + return min; +} + +/* XXX: should we do the duplicating of the picture ref here, instead of + * forcing the source filter to do it? */ +void avfilter_start_frame(AVFilterLink *link, AVFilterPicRef *picref) +{ + void (*start_frame)(AVFilterLink *, AVFilterPicRef *); + AVFilterPad *dst = &link_dpad(link); + + if(!(start_frame = dst->start_frame)) + start_frame = avfilter_default_start_frame; + + /* prepare to copy the picture if it has insufficient permissions */ + if((dst->min_perms & picref->perms) != dst->min_perms || + dst->rej_perms & picref->perms) { + /* + av_log(link->dst, AV_LOG_INFO, + "frame copy needed (have perms %x, need %x, reject %x)\n", + picref->perms, + link_dpad(link).min_perms, link_dpad(link).rej_perms); + */ + + link->cur_pic = avfilter_default_get_video_buffer(link, dst->min_perms); + link->srcpic = picref; + link->cur_pic->pts = link->srcpic->pts; + } + else + link->cur_pic = picref; + + start_frame(link, link->cur_pic); +} + +void avfilter_end_frame(AVFilterLink *link) +{ + void (*end_frame)(AVFilterLink *); + + if(!(end_frame = link_dpad(link).end_frame)) + end_frame = avfilter_default_end_frame; + + end_frame(link); + + /* unreference the source picture if we're feeding the destination filter + * a copied version dues to permission issues */ + if(link->srcpic) { + avfilter_unref_pic(link->srcpic); + link->srcpic = NULL; + } + +} + +void avfilter_draw_slice(AVFilterLink *link, int y, int h) +{ + uint8_t *src[4], *dst[4]; + int i, j, hsub, vsub; + + /* copy the slice if needed for permission reasons */ + if(link->srcpic) { + avcodec_get_chroma_sub_sample(link->format, &hsub, &vsub); + + for(i = 0; i < 4; i ++) { + if(link->srcpic->data[i]) { + src[i] = link->srcpic-> data[i] + + (y >> (i==0 ? 0 : vsub)) * link->srcpic-> linesize[i]; + dst[i] = link->cur_pic->data[i] + + (y >> (i==0 ? 0 : vsub)) * link->cur_pic->linesize[i]; + } else + src[i] = dst[i] = NULL; + } + + for(i = 0; i < 4; i ++) { + int planew = + ff_get_plane_bytewidth(link->format, link->cur_pic->w, i); + + if(!src[i]) continue; + + for(j = 0; j < h >> (i==0 ? 0 : vsub); j ++) { + memcpy(dst[i], src[i], planew); + src[i] += link->srcpic ->linesize[i]; + dst[i] += link->cur_pic->linesize[i]; + } + } + } + + if(link_dpad(link).draw_slice) + link_dpad(link).draw_slice(link, y, h); +} + +AVFilter *avfilter_get_by_name(const char *name) +{ + struct FilterList *filt; + + for(filt = filters; filt; filt = filt->next) + if(!strcmp(filt->filter->name, name)) + return filt->filter; + + return NULL; +} + +void avfilter_register(AVFilter *filter) +{ + struct FilterList *newfilt = av_malloc(sizeof(struct FilterList)); + + newfilt->filter = filter; + newfilt->next = filters; + filters = newfilt; +} + +void avfilter_uninit(void) +{ + struct FilterList *tmp; + + for(; filters; filters = tmp) { + tmp = filters->next; + av_free(filters); + } +} + +static int pad_count(const AVFilterPad *pads) +{ + int count; + + for(count = 0; pads->name; count ++) pads ++; + return count; +} + +static const char *filter_name(void *p) +{ + AVFilterContext *filter = p; + return filter->filter->name; +} + +AVFilterContext *avfilter_open(AVFilter *filter, const char *inst_name) +{ + AVFilterContext *ret; + + if (!filter) + return 0; + + ret = av_malloc(sizeof(AVFilterContext)); + + ret->av_class = av_mallocz(sizeof(AVClass)); + ret->av_class->item_name = filter_name; + ret->filter = filter; + ret->name = inst_name ? av_strdup(inst_name) : NULL; + ret->priv = av_mallocz(filter->priv_size); + + ret->input_count = pad_count(filter->inputs); + ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->input_count); + memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad)*ret->input_count); + ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->input_count); + + ret->output_count = pad_count(filter->outputs); + ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->output_count); + memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad)*ret->output_count); + ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->output_count); + + return ret; +} + +void avfilter_destroy(AVFilterContext *filter) +{ + int i; + + if(filter->filter->uninit) + filter->filter->uninit(filter); + + for(i = 0; i < filter->input_count; i ++) { + if(filter->inputs[i]) + filter->inputs[i]->src->outputs[filter->inputs[i]->srcpad] = NULL; + av_freep(&filter->inputs[i]); + } + for(i = 0; i < filter->output_count; i ++) { + if(filter->outputs[i]) + filter->outputs[i]->dst->inputs[filter->outputs[i]->dstpad] = NULL; + av_freep(&filter->outputs[i]); + } + + av_freep(&filter->name); + av_freep(&filter->input_pads); + av_freep(&filter->output_pads); + av_freep(&filter->inputs); + av_freep(&filter->outputs); + av_freep(&filter->priv); + av_freep(&filter->av_class); + av_free(filter); +} + +int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque) +{ + int ret=0; + + if(filter->filter->init) + ret = filter->filter->init(filter, args, opaque); + return ret; +} + diff --git a/contrib/ffmpeg/libavfilter/avfilter.h b/contrib/ffmpeg/libavfilter/avfilter.h new file mode 100644 index 000000000..1a2aa0f35 --- /dev/null +++ b/contrib/ffmpeg/libavfilter/avfilter.h @@ -0,0 +1,616 @@ +/* + * filter layer + * 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 + */ + +#ifndef FFMPEG_AVFILTER_H +#define FFMPEG_AVFILTER_H + +#define LIBAVFILTER_VERSION_MAJOR 0 +#define LIBAVFILTER_VERSION_MINOR 0 +#define LIBAVFILTER_VERSION_MICRO 0 + +#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \ + LIBAVFILTER_VERSION_MINOR, \ + LIBAVFILTER_VERSION_MICRO) +#define LIBAVFILTER_VERSION AV_VERSION(LIBAVFILTER_VERSION_MAJOR, \ + LIBAVFILTER_VERSION_MINOR, \ + LIBAVFILTER_VERSION_MICRO) +#define LIBAVFILTER_BUILD LIBAVFILTER_VERSION_INT + +#include <stddef.h> +#include "avcodec.h" + +typedef struct AVFilterContext AVFilterContext; +typedef struct AVFilterLink AVFilterLink; +typedef struct AVFilterPad AVFilterPad; + +/* TODO: look for other flags which may be useful in this structure (interlace + * flags, etc) + */ +/** + * A reference-counted picture data type used by the filter system. Filters + * should not store pointers to this structure directly, but instead use the + * AVFilterPicRef structure below. + */ +typedef struct AVFilterPic +{ + uint8_t *data[4]; ///< picture data for each plane + int linesize[4]; ///< number of bytes per line + enum PixelFormat format; ///< colorspace + + unsigned refcount; ///< number of references to this image + + /** private data to be used by a custom free function */ + void *priv; + /** + * A pointer to the function to deallocate this image if the default + * function is not sufficient. This could, for example, add the memory + * back into a memory pool to be reused later without the overhead of + * reallocating it from scratch. + */ + void (*free)(struct AVFilterPic *pic); +} AVFilterPic; + +/** + * A reference to an AVFilterPic. Since filters can manipulate the origin of + * a picture to, for example, crop image without any memcpy, the picture origin + * and dimensions are per-reference properties. Linesize is also useful for + * image flipping, frame to field filters, etc, and so is also per-reference. + * + * TODO: add anything necessary for frame reordering + */ +typedef struct AVFilterPicRef +{ + AVFilterPic *pic; ///< the picture that this is a reference to + uint8_t *data[4]; ///< picture data for each plane + int linesize[4]; ///< number of bytes per line + int w; ///< image width + int h; ///< image height + + int64_t pts; ///< presentation timestamp in units of 1/AV_TIME_BASE + + AVRational pixel_aspect; ///< pixel aspect ratio + + int perms; ///< permissions +#define AV_PERM_READ 0x01 ///< can read from the buffer +#define AV_PERM_WRITE 0x02 ///< can write to the buffer +#define AV_PERM_PRESERVE 0x04 ///< nobody else can overwrite the buffer +#define AV_PERM_REUSE 0x08 ///< can output the buffer multiple times, with the same contents each time +#define AV_PERM_REUSE2 0x10 ///< can output the buffer multiple times, modified each time +} AVFilterPicRef; + +/** + * Add a new reference to a picture. + * @param ref an existing reference to the picture + * @param pmask a bitmask containing the allowable permissions in the new + * reference + * @return a new reference to the picture with the same properties as the + * old, excluding any permissions denied by pmask + */ +AVFilterPicRef *avfilter_ref_pic(AVFilterPicRef *ref, int pmask); + +/** + * Remove a reference to a picture. If this is the last reference to the + * picture, the picture itself is also automatically freed. + * @param ref reference to the picture + */ +void avfilter_unref_pic(AVFilterPicRef *ref); + +/** + * A list of supported formats for one end of a filter link. This is used + * during the format negotiation process to try to pick the best format to + * use to minimize the number of necessary conversions. Each filter gives a + * list of the formats supported by each input and output pad. The list + * given for each pad need not be distinct - they may be references to the + * same list of formats, as is often the case when a filter supports multiple + * formats, but will always outut the same format as it is given in input. + * + * In this way, a list of possible input formats and a list of possible + * output formats are associated with each link. When a set of formats is + * negotiated over a link, the input and output lists are merged to form a + * new list containing only the common elements of each list. In the case + * that there were no common elements, a format conversion is necessary. + * Otherwise, the lists are merged, and all other links which reference + * either of the format lists involved in the merge are also affected. + * + * For example, consider the filter chain: + * filter (a) --> (b) filter (b) --> (c) filter + * + * where the letters in parenthesis indicate a list of formats supported on + * the input or output of the link. Suppose the lists are as follows: + * (a) = {A, B} + * (b) = {A, B, C} + * (c) = {B, C} + * + * First, the first link's lists are merged, yielding: + * filter (a) --> (a) filter (a) --> (c) filter + * + * Notice that format list (b) now refers to the same list as filter list (a). + * Next, the lists for the second link are merged, yielding: + * filter (a) --> (a) filter (a) --> (a) filter + * + * where (a) = {B}. + * + * Unfortunately, when the format lists at the two ends of a link are merged, + * we must ensure that all links which reference either pre-merge format list + * get updated as well. Therefore, we have the format list structure store a + * pointer to each of the pointers to itself. + */ +typedef struct AVFilterFormats AVFilterFormats; +struct AVFilterFormats +{ + unsigned format_count; ///< number of formats + int *formats; ///< list of formats + + unsigned refcount; ///< number of references to this list + AVFilterFormats ***refs; ///< references to this list +}; + +/** + * Helper function to create a list of supported formats. This is intended + * for use in AVFilter->query_formats(). + * @param len the number of formats supported + * @param ... a list of the supported formats + * @return the format list, with no existing references + */ +AVFilterFormats *avfilter_make_format_list(int len, ...); + +/** + * Returns a list of all colorspaces supported by FFmpeg. + */ +AVFilterFormats *avfilter_all_colorspaces(void); + +/** + * Returns a format list which contains the intersection of the formats of + * a and b. And all the references of a and b, and a and b will be + * deallocated. + * + * If a and b do not share any common formats, neither is modified, and NULL + * is returned. + */ +AVFilterFormats *avfilter_merge_formats(AVFilterFormats *a, AVFilterFormats *b); + +/** + * Adds *ref as a new reference to f. + * That is the pointers will point like in the ascii art below: + * ________ + * | f |<--------. + * | ____ | | + * | |refs| | __|_ + * | |* * | | | | | + * | |* *--------->|*ref| + * | |____| | |____| + * |________| + */ +void avfilter_formats_ref(AVFilterFormats *f, AVFilterFormats **ref); + +/** + * Remove *ref as a reference to the format list it currently points to, + * deallocate that list if this was the last reference, and set *ref to NULL. + */ +void avfilter_formats_unref(AVFilterFormats **ref); + +/** + * + * Before After + * ________ ________ + * | f |<---------. | f |<---------. + * | ____ | ___|___ | ____ | ___|___ + * | |refs| | | | | | |refs| | | | | NULL + * | |* *--------->|*oldref| | |* *--------->|*newref| ^ + * | |* * | | |_______| | |* * | | |_______| ___|___ + * | |____| | | |____| | | | | + * |________| |________| |*oldref| + * |_______| + */ +void avfilter_formats_changeref(AVFilterFormats **oldref, + AVFilterFormats **newref); + +/** + * A filter pad used for either input or output. + */ +struct AVFilterPad +{ + /** + * Pad name. The name is unique among inputs and among outputs, but an + * input may have the same name as an output. This may be NULL if this + * pad has no need to ever be referenced by name. + */ + const char *name; + + /** + * AVFilterPad type. Only video supported now, hopefully someone will + * add audio in the future. + */ + enum CodecType type; + + /** + * Minimum required permissions on incoming buffers. Any buffers with + * insufficient permissions will be automatically copied by the filter + * system to a new buffer which provides the needed access permissions. + * + * Input pads only. + */ + int min_perms; + + /** + * Permissions which are not accepted on incoming buffers. Any buffer + * which has any of these permissions set be automatically copied by the + * filter system to a new buffer which does not have those permissions. + * This can be used to easily disallow buffers with AV_PERM_REUSE. + * + * Input pads only. + */ + int rej_perms; + + /** + * Callback called before passing the first slice of a new frame. If + * NULL, the filter layer will default to storing a reference to the + * picture inside the link structure. + * + * Input video pads only. + */ + void (*start_frame)(AVFilterLink *link, AVFilterPicRef *picref); + + /** + * Callback function to get a buffer. If NULL, the filter system will + * handle buffer requests. + * + * Input video pads only. + */ + AVFilterPicRef *(*get_video_buffer)(AVFilterLink *link, int perms); + + /** + * Callback called after the slices of a frame are completely sent. If + * NULL, the filter layer will default to releasing the reference stored + * in the link structure during start_frame(). + * + * Input video pads only. + */ + void (*end_frame)(AVFilterLink *link); + + /** + * Slice drawing callback. This is where a filter receives video data + * and should do its processing. + * + * Input video pads only. + */ + void (*draw_slice)(AVFilterLink *link, int y, int height); + + /** + * Frame poll callback. This returns the number of immediately available + * frames. It should return a positive value if the next request_frame() + * is guaranteed to return one frame (with no delay). + * + * Defaults to just calling the source poll_frame() method. + * + * Output video pads only. + */ + int (*poll_frame)(AVFilterLink *link); + + /** + * Frame request callback. A call to this should result in at least one + * frame being output over the given link. This should return zero on + * success, and another value on error. + * + * Output video pads only. + */ + int (*request_frame)(AVFilterLink *link); + + /** + * Link configuration callback. + * + * For output pads, this should set the link properties such as + * width/height. This should NOT set the format property - that is + * negotiated between filters by the filter system using the + * query_formats() callback before this function is called. + * + * For input pads, this should check the properties of the link, and update + * the filter's internal state as necessary. + * + * For both input and output filters, this should return zero on success, + * and another value on error. + */ + int (*config_props)(AVFilterLink *link); +}; + +/** Default handler for start_frame() for video inputs */ +void avfilter_default_start_frame(AVFilterLink *link, AVFilterPicRef *picref); +/** Default handler for end_frame() for video inputs */ +void avfilter_default_end_frame(AVFilterLink *link); +/** Default handler for config_props() for video outputs */ +int avfilter_default_config_output_link(AVFilterLink *link); +/** Default handler for config_props() for video inputs */ +int avfilter_default_config_input_link (AVFilterLink *link); +/** Default handler for get_video_buffer() for video inputs */ +AVFilterPicRef *avfilter_default_get_video_buffer(AVFilterLink *link, + int perms); +/** + * 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. + */ +void avfilter_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats); +/** Default handler for query_formats() */ +int avfilter_default_query_formats(AVFilterContext *ctx); + +/** + * Filter definition. This defines the pads a filter contains, and all the + * callback functions used to interact with the filter. + */ +typedef struct +{ + const char *name; ///< filter name + + int priv_size; ///< size of private data to allocate for the filter + + /** + * Filter initialization function. Args contains the user-supplied + * parameters. FIXME: maybe an AVOption-based system would be better? + * opaque is data provided by the code requesting creation of the filter, + * and is used to pass data to the filter. + */ + int (*init)(AVFilterContext *ctx, const char *args, void *opaque); + + /** + * Filter uninitialization function. Should deallocate any memory held + * by the filter, release any picture references, etc. This does not need + * to deallocate the AVFilterContext->priv memory itself. + */ + void (*uninit)(AVFilterContext *ctx); + + /** + * Query formats supported by the filter and its pads. Should set the + * in_formats for links connected to its output pads, and out_formats + * for links connected to its input pads. + * + * Should return zero on success. + */ + int (*query_formats)(AVFilterContext *); + + const AVFilterPad *inputs; ///< NULL terminated list of inputs. NULL if none + const AVFilterPad *outputs; ///< NULL terminated list of outputs. NULL if none +} AVFilter; + +/** An instance of a filter */ +struct AVFilterContext +{ + AVClass *av_class; ///< needed for av_log() + + AVFilter *filter; ///< the AVFilter of which this is an instance + + char *name; ///< name of this filter instance + + unsigned input_count; ///< number of input pads + AVFilterPad *input_pads; ///< array of input pads + AVFilterLink **inputs; ///< array of pointers to input links + + unsigned output_count; ///< number of output pads + AVFilterPad *output_pads; ///< array of output pads + AVFilterLink **outputs; ///< array of pointers to output links + + void *priv; ///< private data for use by the filter +}; + +/** + * A link between two filters. This contains pointers to the source and + * destination filters between which this link exists, and the indices of + * the pads involved. In addition, this link also contains the parameters + * which have been negotiated and agreed upon between the filter, such as + * image dimensions, format, etc + */ +struct AVFilterLink +{ + AVFilterContext *src; ///< source filter + unsigned int srcpad; ///< index of the output pad on the source filter + + AVFilterContext *dst; ///< dest filter + unsigned int dstpad; ///< index of the input pad on the dest filter + + /** stage of the initialization of the link properties (dimensions, etc) */ + enum { + AVLINK_UNINIT = 0, ///< not started + AVLINK_STARTINIT, ///< started, but incomplete + AVLINK_INIT ///< complete + } init_state; + + int w; ///< agreed upon image width + int h; ///< agreed upon image height + enum PixelFormat format; ///< agreed upon image colorspace + + /** + * Lists of formats supported by the input and output filters respectively. + * These lists are used for negotiating the format to actually be used, + * which will be loaded into the format member, above, when chosen. + */ + AVFilterFormats *in_formats; + AVFilterFormats *out_formats; + + /** + * The picture reference currently being sent across the link by the source + * filter. This is used internally by the filter system to allow + * automatic copying of pictures which do not have sufficient permissions + * for the destination. This should not be accessed directly by the + * filters. + */ + AVFilterPicRef *srcpic; + + AVFilterPicRef *cur_pic; + AVFilterPicRef *outpic; +}; + +/** + * Link two filters together. + * @param src the source filter + * @param srcpad index of the output pad on the source filter + * @param dst the destination filter + * @param dstpad index of the input pad on the destination filter + * @return zero on success + */ +int avfilter_link(AVFilterContext *src, unsigned srcpad, + AVFilterContext *dst, unsigned dstpad); + +/** + * Negotiate the colorspace, dimensions, etc of all inputs to a filter. + * @param filter the filter to negotiate the properties for its inputs + * @return zero on successful negotiation + */ +int avfilter_config_links(AVFilterContext *filter); + +/** + * Request a picture buffer with a specific set of permissions + * @param link the output link to the filter from which the picture will + * be requested + * @param perms the required access permissions + * @return A reference to the picture. This must be unreferenced with + * avfilter_unref_pic when you are finished with it. + */ +AVFilterPicRef *avfilter_get_video_buffer(AVFilterLink *link, int perms); + +/** + * Request an input frame from the filter at the other end of the link. + * @param link the input link + * @return zero on success + */ +int avfilter_request_frame(AVFilterLink *link); + +/** + * Poll a frame from the filter chain. + * @param link the input link + * @return the number of imediately available frames + */ +int avfilter_poll_frame(AVFilterLink *link); + +/** + * Notify the next filter of the start of a frame. + * @param link the output link the frame will be sent over + * @param picref A reference to the frame about to be sent. The data for this + * frame need only be valid once draw_slice() is called for that + * portion. The receiving filter will free this reference when + * it no longer needs it. + */ +void avfilter_start_frame(AVFilterLink *link, AVFilterPicRef *picref); + +/** + * Notify the next filter that the current frame has finished + * @param link the output link the frame was sent over + */ +void avfilter_end_frame(AVFilterLink *link); + +/** + * Send a slice to the next filter. + * @param link the output link over which the frame is being sent + * @param y offset in pixels from the top of the image for this slice + * @param h height of this slice in pixels + */ +void avfilter_draw_slice(AVFilterLink *link, int y, int h); + +/** Initialize the filter system. Registers all builtin filters */ +void avfilter_register_all(void); + +/** Uninitialize the filter system. Unregisters all filters */ +void avfilter_uninit(void); + +/** + * Register a filter. This is only needed if you plan to use + * avfilter_get_by_name later to lookup the AVFilter structure by name. A + * filter can still by instantiated with avfilter_open even if it is not + * registered. + * @param filter the filter to register + */ +void avfilter_register(AVFilter *filter); + +/** + * Gets a filter definition matching the given name. + * @param name the filter name to find + * @return the filter definition, if any matching one is registered. + * NULL if none found. + */ +AVFilter *avfilter_get_by_name(const char *name); + +/** + * Create a filter instance. + * @param filter the filter to create an instance of + * @param inst_name Name to give to the new instance. Can be NULL for none. + * @return Pointer to the new instance on success. NULL on failure. + */ +AVFilterContext *avfilter_open(AVFilter *filter, const char *inst_name); + +/** + * Initialize a filter. + * @param filter the filter to initialize + * @param args A string of parameters to use when initializing the filter. + * The format and meaning of this string varies by filter. + * @param opaque Any extra non-string data needed by the filter. The meaning + * of this parameter varies by filter. + * @return zero on success + */ +int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque); + +/** + * Destroy a filter. + * @param filter the filter to destroy + */ +void avfilter_destroy(AVFilterContext *filter); + +/** + * Insert a filter in the middle of an existing link. + * @param link the link into which the filter should be inserted + * @param filt the filter to be inserted + * @param in the input pad on the filter to connect + * @param out the output pad on the filter to connect + * @return zero on success + */ +int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt, + unsigned in, unsigned out); + +/** + * Insert a new pad. + * @param idx Insertion point. Pad is inserted at the end if this point + * is beyond the end of the list of pads. + * @param count Pointer to the number of pads in the list + * @param padidx_off Offset within an AVFilterLink structure to the element + * to increment when inserting a new pad causes link + * numbering to change + * @param pads Pointer to the pointer to the beginning of the list of pads + * @param links Pointer to the pointer to the beginning of the list of links + * @param newpad The new pad to add. A copy is made when adding. + */ +void avfilter_insert_pad(unsigned idx, unsigned *count, size_t padidx_off, + AVFilterPad **pads, AVFilterLink ***links, + AVFilterPad *newpad); + +/** insert a new input pad for the filter */ +static inline void avfilter_insert_inpad(AVFilterContext *f, unsigned index, + AVFilterPad *p) +{ + avfilter_insert_pad(index, &f->input_count, offsetof(AVFilterLink, dstpad), + &f->input_pads, &f->inputs, p); +} + +/** insert a new output pad for the filter */ +static inline void avfilter_insert_outpad(AVFilterContext *f, unsigned index, + AVFilterPad *p) +{ + avfilter_insert_pad(index, &f->output_count, offsetof(AVFilterLink, srcpad), + &f->output_pads, &f->outputs, p); +} + +#endif /* FFMPEG_AVFILTER_H */ diff --git a/contrib/ffmpeg/libavfilter/defaults.c b/contrib/ffmpeg/libavfilter/defaults.c new file mode 100644 index 000000000..ab184973a --- /dev/null +++ b/contrib/ffmpeg/libavfilter/defaults.c @@ -0,0 +1,158 @@ +/* + * Filter layer - default implementations + * 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 "avfilter.h" +#include "imgconvert.h" + +/* TODO: buffer pool. see comment for avfilter_default_get_video_buffer() */ +void avfilter_default_free_video_buffer(AVFilterPic *pic) +{ + av_free(pic->data[0]); + av_free(pic); +} + +#define ALIGN(a) do{ \ + (a) = ((a) + 15) & (~15); \ + } while(0); + +/* TODO: set the buffer's priv member to a context structure for the whole + * filter chain. This will allow for a buffer pool instead of the constant + * alloc & free cycle currently implemented. */ +AVFilterPicRef *avfilter_default_get_video_buffer(AVFilterLink *link, int perms) +{ + AVFilterPic *pic = av_mallocz(sizeof(AVFilterPic)); + AVFilterPicRef *ref = av_mallocz(sizeof(AVFilterPicRef)); + int i, tempsize; + char *buf; + + ref->pic = pic; + ref->w = link->w; + ref->h = link->h; + + /* make sure the buffer gets read permission or it's useless for output */ + ref->perms = perms | AV_PERM_READ; + + pic->refcount = 1; + pic->format = link->format; + pic->free = avfilter_default_free_video_buffer; + ff_fill_linesize((AVPicture *)pic, pic->format, ref->w); + + for (i=0; i<4;i++) + ALIGN(pic->linesize[i]); + + tempsize = ff_fill_pointer((AVPicture *)pic, NULL, pic->format, ref->h); + buf = av_malloc(tempsize); + ff_fill_pointer((AVPicture *)pic, buf, pic->format, ref->h); + + memcpy(ref->data, pic->data, sizeof(pic->data)); + memcpy(ref->linesize, pic->linesize, sizeof(pic->linesize)); + + return ref; +} + +void avfilter_default_start_frame(AVFilterLink *link, AVFilterPicRef *picref) +{ + AVFilterLink *out = NULL; + + if(link->dst->output_count) + out = link->dst->outputs[0]; + + if(out) { + out->outpic = avfilter_get_video_buffer(out, AV_PERM_WRITE); + out->outpic->pts = picref->pts; + avfilter_start_frame(out, avfilter_ref_pic(out->outpic, ~0)); + } +} + +void avfilter_default_end_frame(AVFilterLink *link) +{ + AVFilterLink *out = NULL; + + if(link->dst->output_count) + out = link->dst->outputs[0]; + + avfilter_unref_pic(link->cur_pic); + link->cur_pic = NULL; + + if(out) { + if(out->outpic) { + avfilter_unref_pic(out->outpic); + out->outpic = NULL; + } + avfilter_end_frame(out); + } +} + +/** + * default config_link() implementation for output video links to simplify + * the implementation of one input one output video filters */ +int avfilter_default_config_output_link(AVFilterLink *link) +{ + if(link->src->input_count && link->src->inputs[0]) { + link->w = link->src->inputs[0]->w; + link->h = link->src->inputs[0]->h; + } else { + /* XXX: any non-simple filter which would cause this branch to be taken + * really should implement its own config_props() for this link. */ + return -1; + } + + return 0; +} + +/** + * 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. + * + * FIXME: this will need changed for filters with a mix of pad types + * (video + audio, etc) + */ +void avfilter_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats) +{ + int count = 0, i; + + for(i = 0; i < ctx->input_count; i ++) { + if(ctx->inputs[i]) { + avfilter_formats_ref(formats, &ctx->inputs[i]->out_formats); + count ++; + } + } + for(i = 0; i < ctx->output_count; i ++) { + if(ctx->outputs[i]) { + avfilter_formats_ref(formats, &ctx->outputs[i]->in_formats); + count ++; + } + } + + if(!count) { + av_free(formats->formats); + av_free(formats->refs); + av_free(formats); + } +} + +int avfilter_default_query_formats(AVFilterContext *ctx) +{ + avfilter_set_common_formats(ctx, avfilter_all_colorspaces()); + return 0; +} + diff --git a/contrib/ffmpeg/libavfilter/formats.c b/contrib/ffmpeg/libavfilter/formats.c new file mode 100644 index 000000000..33fec163a --- /dev/null +++ b/contrib/ffmpeg/libavfilter/formats.c @@ -0,0 +1,148 @@ +/* + * 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 "avfilter.h" + +/** + * Add all refs from a to ret and destroy a. + */ +static void merge_ref(AVFilterFormats *ret, AVFilterFormats *a) +{ + int i; + + for(i = 0; i < a->refcount; i ++) { + ret->refs[ret->refcount] = a->refs[i]; + *ret->refs[ret->refcount++] = ret; + } + + av_free(a->refs); + av_free(a->formats); + av_free(a); +} + +AVFilterFormats *avfilter_merge_formats(AVFilterFormats *a, AVFilterFormats *b) +{ + AVFilterFormats *ret; + unsigned i, j, k = 0; + + ret = av_mallocz(sizeof(AVFilterFormats)); + + /* merge list of formats */ + ret->formats = av_malloc(sizeof(*ret->formats) * FFMIN(a->format_count, + b->format_count)); + for(i = 0; i < a->format_count; i ++) + for(j = 0; j < b->format_count; j ++) + if(a->formats[i] == b->formats[j]) + ret->formats[k++] = a->formats[i]; + + ret->format_count = k; + /* check that there was at least one common format */ + if(!ret->format_count) { + av_free(ret->formats); + av_free(ret); + return NULL; + } + + ret->refs = av_malloc(sizeof(AVFilterFormats**)*(a->refcount+b->refcount)); + + merge_ref(ret, a); + merge_ref(ret, b); + + return ret; +} + +AVFilterFormats *avfilter_make_format_list(int len, ...) +{ + AVFilterFormats *ret; + int i; + va_list vl; + + ret = av_mallocz(sizeof(AVFilterFormats)); + ret->formats = av_malloc(sizeof(*ret->formats) * len); + ret->format_count = len; + + va_start(vl, len); + for(i = 0; i < len; i ++) + ret->formats[i] = va_arg(vl, int); + va_end(vl); + + return ret; +} + +AVFilterFormats *avfilter_all_colorspaces(void) +{ + AVFilterFormats *ret; + int i; + + ret = av_mallocz(sizeof(AVFilterFormats)); + ret->formats = av_malloc(sizeof(*ret->formats) * PIX_FMT_NB); + ret->format_count = PIX_FMT_NB; + + for(i = 0; i < PIX_FMT_NB; i ++) + ret->formats[i] = i; + + return ret; +} + +void avfilter_formats_ref(AVFilterFormats *f, AVFilterFormats **ref) +{ + *ref = f; + f->refs = av_realloc(f->refs, sizeof(AVFilterFormats**) * ++f->refcount); + f->refs[f->refcount-1] = ref; +} + +static int find_ref_index(AVFilterFormats **ref) +{ + int i; + for(i = 0; i < (*ref)->refcount; i ++) + if((*ref)->refs[i] == ref) + return i; + return -1; +} + +void avfilter_formats_unref(AVFilterFormats **ref) +{ + int idx = find_ref_index(ref); + + if(idx >= 0) + memmove((*ref)->refs + idx, (*ref)->refs + idx+1, + sizeof(AVFilterFormats**) * ((*ref)->refcount-idx-1)); + + if(!--(*ref)->refcount) { + av_free((*ref)->formats); + av_free((*ref)->refs); + av_free(*ref); + } + *ref = NULL; +} + +void avfilter_formats_changeref(AVFilterFormats **oldref, + AVFilterFormats **newref) +{ + int idx = find_ref_index(oldref); + + if(idx >= 0) { + (*oldref)->refs[idx] = newref; + *newref = *oldref; + *oldref = NULL; + } +} + |