lavfi: rename vsink_buffer.c to sink_buffer.c, and vsink_buffer.h to buffersink.h

This is done in order to clarify the non-video-specific nature of the
buffersink code, as the result of the video/audio API unification of
the previous commit, and for improving overall consistency.

1 files changed, 263 insertions, 0 deletions

diff --git a/libavfilter/sink_buffer.c b/libavfilter/sink_buffer.c
new file mode 100644
index 0000000000..6f7c542498
--- /dev/null
+++ b/libavfilter/sink_buffer.c
@@ -0,0 +1,263 @@
+/*
+ * 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 video sink
+ */
+
+#include "libavutil/fifo.h"
+#include "avfilter.h"
+#include "buffersink.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 int packing_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;
+    params->packing_fmts = packing_fmts;
+    return params;
+}
+
+typedef struct {
+    AVFifoBuffer *fifo;                      ///< FIFO buffer of video frame references
+
+    /* only used for video */
+    const enum PixelFormat *pixel_fmts;     ///< list of accepted pixel formats, must be terminated with -1
+
+    /* only used for audio */
+    const enum AVSampleFormat *sample_fmts; ///< list of accepted sample formats, terminated by AV_SAMPLE_FMT_NONE
+    const int64_t *channel_layouts;         ///< list of accepted channel layouts, terminated by -1
+    const int *packing_fmts;                ///< list of accepted packing formats, 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);
+    }
+    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 void end_frame(AVFilterLink *inlink)
+{
+    AVFilterContext *ctx = inlink->dst;
+    BufferSinkContext *buf = inlink->dst->priv;
+
+    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;
+        }
+    }
+
+    /* cache frame */
+    av_fifo_generic_write(buf->fifo,
+                          &inlink->cur_buf, sizeof(AVFilterBufferRef *), NULL);
+}
+
+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;
+
+    /* no picref available, fetch it from the filterchain */
+    if (!av_fifo_size(buf->fifo)) {
+        if ((ret = avfilter_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;
+}
+
+#if FF_API_OLD_VSINK_API
+int av_vsink_buffer_get_video_buffer_ref(AVFilterContext *ctx,
+                                         AVFilterBufferRef **picref, int flags)
+{
+    return av_buffersink_get_buffer_ref(ctx, picref, flags);
+}
+#endif
+
+#if CONFIG_BUFFERSINK_FILTER
+
+static av_cold int vsink_init(AVFilterContext *ctx, const char *args, void *opaque)
+{
+    BufferSinkContext *buf = ctx->priv;
+    av_unused AVBufferSinkParams *params;
+
+    if (!opaque) {
+        av_log(ctx, AV_LOG_ERROR,
+               "No opaque field provided\n");
+        return AVERROR(EINVAL);
+    } else {
+#if FF_API_OLD_VSINK_API
+        buf->pixel_fmts = (const enum PixelFormats *)opaque;
+#else
+        params = (AVBufferSinkParams *)opaque;
+        buf->pixel_fmts = params->pixel_fmts;
+#endif
+    }
+
+    return common_init(ctx);
+}
+
+static int vsink_query_formats(AVFilterContext *ctx)
+{
+    BufferSinkContext *buf = ctx->priv;
+
+    avfilter_set_common_pixel_formats(ctx, avfilter_make_format_list(buf->pixel_fmts));
+    return 0;
+}
+
+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      = vsink_init,
+    .uninit    = common_uninit,
+
+    .query_formats = vsink_query_formats,
+
+    .inputs    = (AVFilterPad[]) {{ .name          = "default",
+                                    .type          = AVMEDIA_TYPE_VIDEO,
+                                    .end_frame     = end_frame,
+                                    .min_perms     = AV_PERM_READ, },
+                                  { .name = NULL }},
+    .outputs   = (AVFilterPad[]) {{ .name = NULL }},
+};
+
+#endif /* CONFIG_BUFFERSINK_FILTER */
+
+#if CONFIG_ABUFFERSINK_FILTER
+
+static void filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref)
+{
+    end_frame(link);
+}
+
+static av_cold int asink_init(AVFilterContext *ctx, const char *args, void *opaque)
+{
+    BufferSinkContext *buf = ctx->priv;
+    AVABufferSinkParams *params;
+
+    if (!opaque) {
+        av_log(ctx, AV_LOG_ERROR,
+               "No opaque field provided, an AVABufferSinkParams struct is required\n");
+        return AVERROR(EINVAL);
+    } else
+        params = (AVABufferSinkParams *)opaque;
+
+    buf->sample_fmts     = params->sample_fmts;
+    buf->channel_layouts = params->channel_layouts;
+    buf->packing_fmts    = params->packing_fmts;
+
+    return common_init(ctx);
+}
+
+static int asink_query_formats(AVFilterContext *ctx)
+{
+    BufferSinkContext *buf = ctx->priv;
+    AVFilterFormats *formats = NULL;
+
+    if (!(formats = avfilter_make_format_list(buf->sample_fmts)))
+        return AVERROR(ENOMEM);
+    avfilter_set_common_sample_formats(ctx, formats);
+
+    if (!(formats = avfilter_make_format64_list(buf->channel_layouts)))
+        return AVERROR(ENOMEM);
+    avfilter_set_common_channel_layouts(ctx, formats);
+
+    if (!(formats = avfilter_make_format_list(buf->packing_fmts)))
+        return AVERROR(ENOMEM);
+    avfilter_set_common_packing_formats(ctx, formats);
+
+    return 0;
+}
+
+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      = asink_init,
+    .uninit    = common_uninit,
+    .priv_size = sizeof(BufferSinkContext),
+    .query_formats = asink_query_formats,
+
+    .inputs    = (AVFilterPad[]) {{ .name           = "default",
+                                    .type           = AVMEDIA_TYPE_AUDIO,
+                                    .filter_samples = filter_samples,
+                                    .min_perms      = AV_PERM_READ, },
+                                  { .name = NULL }},
+    .outputs   = (AVFilterPad[]) {{ .name = NULL }},
+};
+
+#endif /* CONFIG_ABUFFERSINK_FILTER */