diff options
Diffstat (limited to 'libavfilter/sink_buffer.c')
| -rw-r--r-- | libavfilter/sink_buffer.c | 358 |
1 files changed, 358 insertions, 0 deletions
diff --git a/libavfilter/sink_buffer.c b/libavfilter/sink_buffer.c new file mode 100644 index 0000000..040fbaf --- /dev/null +++ b/libavfilter/sink_buffer.c @@ -0,0 +1,358 @@ +/* + * Copyright (c) 2011 Stefano Sabatini + * + * 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 + */ + +/** + * @file + * buffer sink + */ + +#include "libavutil/avassert.h" +#include "libavutil/fifo.h" +#include "avfilter.h" +#include "buffersink.h" +#include "internal.h" + +AVBufferSinkParams *av_buffersink_params_alloc(void) +{ + static const int pixel_fmts[] = { -1 }; + AVBufferSinkParams *params = av_malloc(sizeof(AVBufferSinkParams)); + if (!params) + return NULL; + + params->pixel_fmts = pixel_fmts; + return params; +} + +AVABufferSinkParams *av_abuffersink_params_alloc(void) +{ + static const int sample_fmts[] = { -1 }; + static const int64_t channel_layouts[] = { -1 }; + AVABufferSinkParams *params = av_malloc(sizeof(AVABufferSinkParams)); + + if (!params) + return NULL; + + params->sample_fmts = sample_fmts; + params->channel_layouts = channel_layouts; + return params; +} + +typedef struct { + AVFifoBuffer *fifo; ///< FIFO buffer of video frame references + unsigned warning_limit; + + /* only used for video */ + enum PixelFormat *pixel_fmts; ///< list of accepted pixel formats, must be terminated with -1 + + /* only used for audio */ + enum AVSampleFormat *sample_fmts; ///< list of accepted sample formats, terminated by AV_SAMPLE_FMT_NONE + int64_t *channel_layouts; ///< list of accepted channel layouts, terminated by -1 +} BufferSinkContext; + +#define FIFO_INIT_SIZE 8 + +static av_cold int common_init(AVFilterContext *ctx) +{ + BufferSinkContext *buf = ctx->priv; + + buf->fifo = av_fifo_alloc(FIFO_INIT_SIZE*sizeof(AVFilterBufferRef *)); + if (!buf->fifo) { + av_log(ctx, AV_LOG_ERROR, "Failed to allocate fifo\n"); + return AVERROR(ENOMEM); + } + buf->warning_limit = 100; + return 0; +} + +static av_cold void common_uninit(AVFilterContext *ctx) +{ + BufferSinkContext *buf = ctx->priv; + AVFilterBufferRef *picref; + + if (buf->fifo) { + while (av_fifo_size(buf->fifo) >= sizeof(AVFilterBufferRef *)) { + av_fifo_generic_read(buf->fifo, &picref, sizeof(picref), NULL); + avfilter_unref_buffer(picref); + } + av_fifo_free(buf->fifo); + buf->fifo = NULL; + } +} + +static int end_frame(AVFilterLink *inlink) +{ + AVFilterContext *ctx = inlink->dst; + BufferSinkContext *buf = inlink->dst->priv; + + av_assert1(inlink->cur_buf); + if (av_fifo_space(buf->fifo) < sizeof(AVFilterBufferRef *)) { + /* realloc fifo size */ + if (av_fifo_realloc2(buf->fifo, av_fifo_size(buf->fifo) * 2) < 0) { + av_log(ctx, AV_LOG_ERROR, + "Cannot buffer more frames. Consume some available frames " + "before adding new ones.\n"); + return AVERROR(ENOMEM); + } + } + + /* cache frame */ + av_fifo_generic_write(buf->fifo, + &inlink->cur_buf, sizeof(AVFilterBufferRef *), NULL); + inlink->cur_buf = NULL; + if (buf->warning_limit && + av_fifo_size(buf->fifo) / sizeof(AVFilterBufferRef *) >= buf->warning_limit) { + av_log(ctx, AV_LOG_WARNING, + "%d buffers queued in %s, something may be wrong.\n", + buf->warning_limit, + (char *)av_x_if_null(ctx->name, ctx->filter->name)); + buf->warning_limit *= 10; + } + return 0; +} + +void av_buffersink_set_frame_size(AVFilterContext *ctx, unsigned frame_size) +{ + AVFilterLink *inlink = ctx->inputs[0]; + + inlink->min_samples = inlink->max_samples = + inlink->partial_buf_size = frame_size; +} + +int av_buffersink_get_buffer_ref(AVFilterContext *ctx, + AVFilterBufferRef **bufref, int flags) +{ + BufferSinkContext *buf = ctx->priv; + AVFilterLink *inlink = ctx->inputs[0]; + int ret; + *bufref = NULL; + + av_assert0( !strcmp(ctx->filter->name, "buffersink") + || !strcmp(ctx->filter->name, "abuffersink") + || !strcmp(ctx->filter->name, "ffbuffersink") + || !strcmp(ctx->filter->name, "ffabuffersink")); + + /* no picref available, fetch it from the filterchain */ + if (!av_fifo_size(buf->fifo)) { + if (flags & AV_BUFFERSINK_FLAG_NO_REQUEST) + return AVERROR(EAGAIN); + if ((ret = ff_request_frame(inlink)) < 0) + return ret; + } + + if (!av_fifo_size(buf->fifo)) + return AVERROR(EINVAL); + + if (flags & AV_BUFFERSINK_FLAG_PEEK) + *bufref = *((AVFilterBufferRef **)av_fifo_peek2(buf->fifo, 0)); + else + av_fifo_generic_read(buf->fifo, bufref, sizeof(*bufref), NULL); + + return 0; +} + +AVRational av_buffersink_get_frame_rate(AVFilterContext *ctx) +{ + av_assert0( !strcmp(ctx->filter->name, "buffersink") + || !strcmp(ctx->filter->name, "ffbuffersink")); + + return ctx->inputs[0]->frame_rate; +} + +int av_buffersink_poll_frame(AVFilterContext *ctx) +{ + BufferSinkContext *buf = ctx->priv; + AVFilterLink *inlink = ctx->inputs[0]; + + av_assert0( !strcmp(ctx->filter->name, "buffersink") + || !strcmp(ctx->filter->name, "abuffersink") + || !strcmp(ctx->filter->name, "ffbuffersink") + || !strcmp(ctx->filter->name, "ffabuffersink")); + + return av_fifo_size(buf->fifo)/sizeof(AVFilterBufferRef *) + ff_poll_frame(inlink); +} + +#if CONFIG_BUFFERSINK_FILTER || CONFIG_FFBUFFERSINK_FILTER + +static av_cold int vsink_init(AVFilterContext *ctx, const char *args, void *opaque) +{ + BufferSinkContext *buf = ctx->priv; + AVBufferSinkParams *params = opaque; + + if (params && buf->pixel_fmts) { + const int *pixel_fmts = params->pixel_fmts; + + buf->pixel_fmts = ff_copy_int_list(pixel_fmts); + if (!buf->pixel_fmts) + return AVERROR(ENOMEM); + } + + return common_init(ctx); +} + +static av_cold void vsink_uninit(AVFilterContext *ctx) +{ + BufferSinkContext *buf = ctx->priv; + av_freep(&buf->pixel_fmts); + common_uninit(ctx); +} + +static int vsink_query_formats(AVFilterContext *ctx) +{ + BufferSinkContext *buf = ctx->priv; + + if (buf->pixel_fmts) + ff_set_common_formats(ctx, ff_make_format_list(buf->pixel_fmts)); + else + ff_default_query_formats(ctx); + + return 0; +} + +AVFilter avfilter_vsink_ffbuffersink = { + .name = "ffbuffersink", + .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them available to the end of the filter graph."), + .priv_size = sizeof(BufferSinkContext), + .init_opaque = vsink_init, + .uninit = vsink_uninit, + + .query_formats = vsink_query_formats, + + .inputs = (const AVFilterPad[]) {{ .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .end_frame = end_frame, + .min_perms = AV_PERM_READ | AV_PERM_PRESERVE, }, + { .name = NULL }}, + .outputs = (const AVFilterPad[]) {{ .name = NULL }}, +}; + +AVFilter avfilter_vsink_buffersink = { + .name = "buffersink", + .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them available to the end of the filter graph."), + .priv_size = sizeof(BufferSinkContext), + .init_opaque = vsink_init, + .uninit = vsink_uninit, + + .query_formats = vsink_query_formats, + + .inputs = (const AVFilterPad[]) {{ .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .end_frame = end_frame, + .min_perms = AV_PERM_READ | AV_PERM_PRESERVE, }, + { .name = NULL }}, + .outputs = (const AVFilterPad[]) {{ .name = NULL }}, +}; + +#endif /* CONFIG_BUFFERSINK_FILTER */ + +#if CONFIG_ABUFFERSINK_FILTER || CONFIG_FFABUFFERSINK_FILTER + +static int filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref) +{ + end_frame(link); + return 0; +} + +static av_cold int asink_init(AVFilterContext *ctx, const char *args, void *opaque) +{ + BufferSinkContext *buf = ctx->priv; + AVABufferSinkParams *params = opaque; + + if (params && params->sample_fmts) { + buf->sample_fmts = ff_copy_int_list (params->sample_fmts); + if (!buf->sample_fmts) + goto fail_enomem; + } + if (params && params->channel_layouts) { + buf->channel_layouts = ff_copy_int64_list(params->channel_layouts); + if (!buf->channel_layouts) + goto fail_enomem; + } + if (!common_init(ctx)) + return 0; + +fail_enomem: + av_freep(&buf->sample_fmts); + av_freep(&buf->channel_layouts); + return AVERROR(ENOMEM); +} + +static av_cold void asink_uninit(AVFilterContext *ctx) +{ + BufferSinkContext *buf = ctx->priv; + + av_freep(&buf->sample_fmts); + av_freep(&buf->channel_layouts); + common_uninit(ctx); +} + +static int asink_query_formats(AVFilterContext *ctx) +{ + BufferSinkContext *buf = ctx->priv; + AVFilterFormats *formats = NULL; + AVFilterChannelLayouts *layouts = NULL; + + if (buf->sample_fmts) { + if (!(formats = ff_make_format_list(buf->sample_fmts))) + return AVERROR(ENOMEM); + ff_set_common_formats(ctx, formats); + } + + if (buf->channel_layouts) { + if (!(layouts = avfilter_make_format64_list(buf->channel_layouts))) + return AVERROR(ENOMEM); + ff_set_common_channel_layouts(ctx, layouts); + } + + return 0; +} + +AVFilter avfilter_asink_ffabuffersink = { + .name = "ffabuffersink", + .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them available to the end of the filter graph."), + .init_opaque = asink_init, + .uninit = asink_uninit, + .priv_size = sizeof(BufferSinkContext), + .query_formats = asink_query_formats, + + .inputs = (const AVFilterPad[]) {{ .name = "default", + .type = AVMEDIA_TYPE_AUDIO, + .filter_samples = filter_samples, + .min_perms = AV_PERM_READ | AV_PERM_PRESERVE, }, + { .name = NULL }}, + .outputs = (const AVFilterPad[]) {{ .name = NULL }}, +}; + +AVFilter avfilter_asink_abuffersink = { + .name = "abuffersink", + .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them available to the end of the filter graph."), + .init_opaque = asink_init, + .uninit = asink_uninit, + .priv_size = sizeof(BufferSinkContext), + .query_formats = asink_query_formats, + + .inputs = (const AVFilterPad[]) {{ .name = "default", + .type = AVMEDIA_TYPE_AUDIO, + .filter_samples = filter_samples, + .min_perms = AV_PERM_READ | AV_PERM_PRESERVE, }, + { .name = NULL }}, + .outputs = (const AVFilterPad[]) {{ .name = NULL }}, +}; + +#endif /* CONFIG_ABUFFERSINK_FILTER */ |
