lavfi: rename vsrc_buffer.c into src_buffer.c.

1 files changed, 625 insertions, 0 deletions

diff --git a/libavfilter/src_buffer.c b/libavfilter/src_buffer.c
new file mode 100644
index 0000000000..e3060344fb
--- /dev/null
+++ b/libavfilter/src_buffer.c
@@ -0,0 +1,625 @@
+/*
+ * Copyright (c) 2008 Vitor Sessak
+ * Copyright (c) 2010 S.N. Hemanth Meenakshisundaram
+ * Copyright (c) 2011 Mina Nagy Zaki
+ *
+ * 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
+ * memory buffer source filter
+ */
+
+#include "avfilter.h"
+#include "internal.h"
+#include "avcodec.h"
+#include "buffersrc.h"
+#include "vsrc_buffer.h"
+#include "asrc_abuffer.h"
+#include "libavutil/audioconvert.h"
+#include "libavutil/avstring.h"
+#include "libavutil/fifo.h"
+#include "libavutil/imgutils.h"
+
+typedef struct {
+    AVFifoBuffer     *fifo;
+    AVRational        time_base;     ///< time_base to set in the output link
+    int eof;
+    unsigned          nb_failed_requests;
+
+    /* Video only */
+    AVFilterContext  *scale;
+    int               h, w;
+    enum PixelFormat  pix_fmt;
+    AVRational        sample_aspect_ratio;
+    char              sws_param[256];
+
+    /* Audio only */
+    // Audio format of incoming buffers
+    int sample_rate;
+    unsigned int sample_format;
+    int64_t channel_layout;
+    int packing_format;
+
+    // Normalization filters
+    AVFilterContext *aconvert;
+    AVFilterContext *aresample;
+} BufferSourceContext;
+
+#define FIFO_SIZE 8
+
+#define CHECK_PARAM_CHANGE(s, c, width, height, format)\
+    if (c->w != width || c->h != height || c->pix_fmt != format) {\
+        av_log(s, AV_LOG_ERROR, "Changing frame properties on the fly is not supported.\n");\
+        return AVERROR(EINVAL);\
+    }
+
+int av_vsrc_buffer_add_video_buffer_ref(AVFilterContext *buffer_filter,
+                                        AVFilterBufferRef *picref, int flags)
+{
+    BufferSourceContext *c = buffer_filter->priv;
+    AVFilterLink *outlink = buffer_filter->outputs[0];
+    AVFilterBufferRef *buf;
+    int ret;
+
+    if (!picref) {
+        c->eof = 1;
+        return 0;
+    } else if (c->eof)
+        return AVERROR(EINVAL);
+
+    if (!av_fifo_space(c->fifo) &&
+        (ret = av_fifo_realloc2(c->fifo, av_fifo_size(c->fifo) +
+                                         sizeof(buf))) < 0)
+        return ret;
+
+    if (picref->video->w != c->w || picref->video->h != c->h || picref->format != c->pix_fmt) {
+        AVFilterContext *scale = buffer_filter->outputs[0]->dst;
+        AVFilterLink *link;
+        char scale_param[1024];
+
+        av_log(buffer_filter, AV_LOG_INFO,
+               "Buffer video input changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
+               c->w, c->h, av_pix_fmt_descriptors[c->pix_fmt].name,
+               picref->video->w, picref->video->h, av_pix_fmt_descriptors[picref->format].name);
+
+        if (!scale || strcmp(scale->filter->name, "scale")) {
+            AVFilter *f = avfilter_get_by_name("scale");
+
+            av_log(buffer_filter, AV_LOG_INFO, "Inserting scaler filter\n");
+            if ((ret = avfilter_open(&scale, f, "Input equalizer")) < 0)
+                return ret;
+
+            c->scale = scale;
+
+            snprintf(scale_param, sizeof(scale_param)-1, "%d:%d:%s", c->w, c->h, c->sws_param);
+            if ((ret = avfilter_init_filter(scale, scale_param, NULL)) < 0) {
+                return ret;
+            }
+
+            if ((ret = avfilter_insert_filter(buffer_filter->outputs[0], scale, 0, 0)) < 0) {
+                return ret;
+            }
+            scale->outputs[0]->time_base = scale->inputs[0]->time_base;
+
+            scale->outputs[0]->format= c->pix_fmt;
+        } else if (!strcmp(scale->filter->name, "scale")) {
+            snprintf(scale_param, sizeof(scale_param)-1, "%d:%d:%s",
+                     scale->outputs[0]->w, scale->outputs[0]->h, c->sws_param);
+            scale->filter->init(scale, scale_param, NULL);
+        }
+
+        c->pix_fmt = scale->inputs[0]->format = picref->format;
+        c->w       = scale->inputs[0]->w      = picref->video->w;
+        c->h       = scale->inputs[0]->h      = picref->video->h;
+
+        link = scale->outputs[0];
+        if ((ret =  link->srcpad->config_props(link)) < 0)
+            return ret;
+    }
+
+    buf = avfilter_get_video_buffer(outlink, AV_PERM_WRITE,
+                                    picref->video->w, picref->video->h);
+    av_image_copy(buf->data, buf->linesize,
+                  (void*)picref->data, picref->linesize,
+                  picref->format, picref->video->w, picref->video->h);
+    avfilter_copy_buffer_ref_props(buf, picref);
+
+    if ((ret = av_fifo_generic_write(c->fifo, &buf, sizeof(buf), NULL)) < 0) {
+        avfilter_unref_buffer(buf);
+        return ret;
+    }
+    c->nb_failed_requests = 0;
+
+    return 0;
+}
+
+int av_buffersrc_buffer(AVFilterContext *s, AVFilterBufferRef *buf)
+{
+    BufferSourceContext *c = s->priv;
+    int ret;
+
+    if (!buf) {
+        c->eof = 1;
+        return 0;
+    } else if (c->eof)
+        return AVERROR(EINVAL);
+
+    if (!av_fifo_space(c->fifo) &&
+        (ret = av_fifo_realloc2(c->fifo, av_fifo_size(c->fifo) +
+                                         sizeof(buf))) < 0)
+        return ret;
+
+//     CHECK_PARAM_CHANGE(s, c, buf->video->w, buf->video->h, buf->format);
+
+    if ((ret = av_fifo_generic_write(c->fifo, &buf, sizeof(buf), NULL)) < 0)
+        return ret;
+    c->nb_failed_requests = 0;
+
+    return 0;
+}
+
+#if CONFIG_AVCODEC
+#include "avcodec.h"
+
+int av_vsrc_buffer_add_frame(AVFilterContext *buffer_src,
+                             const AVFrame *frame, int flags)
+{
+    BufferSourceContext *c = buffer_src->priv;
+    AVFilterBufferRef *picref;
+    int ret;
+
+    if (!frame) {
+        c->eof = 1;
+        return 0;
+    } else if (c->eof)
+        return AVERROR(EINVAL);
+
+    picref = avfilter_get_video_buffer_ref_from_frame(frame, AV_PERM_WRITE);
+    if (!picref)
+        return AVERROR(ENOMEM);
+    ret = av_vsrc_buffer_add_video_buffer_ref(buffer_src, picref, flags);
+    picref->buf->data[0] = NULL;
+    avfilter_unref_buffer(picref);
+
+    return ret;
+}
+#endif
+
+unsigned av_vsrc_buffer_get_nb_failed_requests(AVFilterContext *buffer_src)
+{
+    return ((BufferSourceContext *)buffer_src->priv)->nb_failed_requests;
+}
+
+static av_cold int init_video(AVFilterContext *ctx, const char *args, void *opaque)
+{
+    BufferSourceContext *c = ctx->priv;
+    char pix_fmt_str[128];
+    int ret, n = 0;
+    *c->sws_param = 0;
+
+    if (!args ||
+        (n = sscanf(args, "%d:%d:%127[^:]:%d:%d:%d:%d:%255c", &c->w, &c->h, pix_fmt_str,
+                    &c->time_base.num, &c->time_base.den,
+                    &c->sample_aspect_ratio.num, &c->sample_aspect_ratio.den, c->sws_param)) < 7) {
+        av_log(ctx, AV_LOG_ERROR, "Expected at least 7 arguments, but only %d found in '%s'\n", n, args);
+        return AVERROR(EINVAL);
+    }
+
+    if ((ret = ff_parse_pixel_format(&c->pix_fmt, pix_fmt_str, ctx)) < 0)
+        return ret;
+
+    if (!(c->fifo = av_fifo_alloc(sizeof(AVFilterBufferRef*))))
+        return AVERROR(ENOMEM);
+
+    av_log(ctx, AV_LOG_INFO, "w:%d h:%d pixfmt:%s tb:%d/%d sar:%d/%d sws_param:%s\n",
+           c->w, c->h, av_pix_fmt_descriptors[c->pix_fmt].name,
+           c->time_base.num, c->time_base.den,
+           c->sample_aspect_ratio.num, c->sample_aspect_ratio.den, c->sws_param);
+    return 0;
+}
+
+static av_cold int init_audio(AVFilterContext *ctx, const char *args0, void *opaque)
+{
+    BufferSourceContext *abuffer = ctx->priv;
+    char *arg = NULL, *ptr, chlayout_str[16];
+    char *args = av_strdup(args0);
+    int ret;
+
+    arg = av_strtok(args, ":", &ptr);
+
+#define ADD_FORMAT(fmt_name)                                            \
+    if (!arg)                                                           \
+        goto arg_fail;                                                  \
+    if ((ret = ff_parse_##fmt_name(&abuffer->fmt_name, arg, ctx)) < 0) { \
+        av_freep(&args);                                                \
+        return ret;                                                     \
+    }                                                                   \
+    if (*args)                                                          \
+        arg = av_strtok(NULL, ":", &ptr)
+
+    ADD_FORMAT(sample_rate);
+    ADD_FORMAT(sample_format);
+    ADD_FORMAT(channel_layout);
+    ADD_FORMAT(packing_format);
+
+    abuffer->fifo = av_fifo_alloc(FIFO_SIZE*sizeof(AVFilterBufferRef*));
+    if (!abuffer->fifo) {
+        av_log(ctx, AV_LOG_ERROR, "Failed to allocate fifo, filter init failed.\n");
+        return AVERROR(ENOMEM);
+    }
+
+    av_get_channel_layout_string(chlayout_str, sizeof(chlayout_str),
+                                 -1, abuffer->channel_layout);
+    av_log(ctx, AV_LOG_INFO, "format:%s layout:%s rate:%d\n",
+           av_get_sample_fmt_name(abuffer->sample_format), chlayout_str,
+           abuffer->sample_rate);
+    av_freep(&args);
+
+    return 0;
+
+arg_fail:
+    av_log(ctx, AV_LOG_ERROR, "Invalid arguments, must be of the form "
+                              "sample_rate:sample_fmt:channel_layout:packing\n");
+    av_freep(&args);
+    return AVERROR(EINVAL);
+}
+
+static av_cold void uninit(AVFilterContext *ctx)
+{
+    BufferSourceContext *s = ctx->priv;
+    while (s->fifo && av_fifo_size(s->fifo)) {
+        AVFilterBufferRef *buf;
+        av_fifo_generic_read(s->fifo, &buf, sizeof(buf), NULL);
+        avfilter_unref_buffer(buf);
+    }
+    av_fifo_free(s->fifo);
+    s->fifo = NULL;
+    avfilter_free(s->scale);
+    s->scale = NULL;
+}
+
+static int query_formats_video(AVFilterContext *ctx)
+{
+    BufferSourceContext *c = ctx->priv;
+    enum PixelFormat pix_fmts[] = { c->pix_fmt, PIX_FMT_NONE };
+
+    avfilter_set_common_pixel_formats(ctx, avfilter_make_format_list(pix_fmts));
+    return 0;
+}
+
+static int query_formats_audio(AVFilterContext *ctx)
+{
+    BufferSourceContext *abuffer = ctx->priv;
+    AVFilterFormats *formats;
+
+    formats = NULL;
+    avfilter_add_format(&formats, abuffer->sample_format);
+    avfilter_set_common_sample_formats(ctx, formats);
+
+    formats = NULL;
+    avfilter_add_format(&formats, abuffer->channel_layout);
+    avfilter_set_common_channel_layouts(ctx, formats);
+
+    formats = NULL;
+    avfilter_add_format(&formats, abuffer->packing_format);
+    avfilter_set_common_packing_formats(ctx, formats);
+
+    return 0;
+}
+
+static int config_output_video(AVFilterLink *link)
+{
+    BufferSourceContext *c = link->src->priv;
+
+    link->w = c->w;
+    link->h = c->h;
+    link->sample_aspect_ratio = c->sample_aspect_ratio;
+    link->time_base = c->time_base;
+
+    return 0;
+}
+
+static int config_output_audio(AVFilterLink *outlink)
+{
+    BufferSourceContext *abuffer = outlink->src->priv;
+    outlink->sample_rate = abuffer->sample_rate;
+    return 0;
+}
+
+static int request_frame(AVFilterLink *link)
+{
+    BufferSourceContext *c = link->src->priv;
+    AVFilterBufferRef *buf;
+
+    if (!av_fifo_size(c->fifo)) {
+        if (c->eof)
+            return AVERROR_EOF;
+        c->nb_failed_requests++;
+        return AVERROR(EAGAIN);
+    }
+    av_fifo_generic_read(c->fifo, &buf, sizeof(buf), NULL);
+
+    switch (link->type) {
+    case AVMEDIA_TYPE_VIDEO:
+        /* TODO reindent */
+    avfilter_start_frame(link, avfilter_ref_buffer(buf, ~0));
+    avfilter_draw_slice(link, 0, link->h, 1);
+    avfilter_end_frame(link);
+    avfilter_unref_buffer(buf);
+        break;
+    case AVMEDIA_TYPE_AUDIO:
+        avfilter_filter_samples(link, avfilter_ref_buffer(buf, ~0));
+        break;
+    default:
+        return AVERROR(ENOSYS);
+    }
+    return 0;
+}
+
+static int poll_frame(AVFilterLink *link)
+{
+    BufferSourceContext *c = link->src->priv;
+    int size = av_fifo_size(c->fifo);
+    if (!size && c->eof)
+        return AVERROR_EOF;
+    return size/sizeof(AVFilterBufferRef*);
+}
+
+static void buf_free(AVFilterBuffer *ptr)
+{
+    av_free(ptr);
+    return;
+}
+
+static void set_link_source(AVFilterContext *src, AVFilterLink *link)
+{
+    link->src       = src;
+    link->srcpad    = &(src->output_pads[0]);
+    src->outputs[0] = link;
+}
+
+static int reconfigure_filter(BufferSourceContext *abuffer, AVFilterContext *filt_ctx)
+{
+    int ret;
+    AVFilterLink * const inlink  = filt_ctx->inputs[0];
+    AVFilterLink * const outlink = filt_ctx->outputs[0];
+
+    inlink->format         = abuffer->sample_format;
+    inlink->channel_layout = abuffer->channel_layout;
+    inlink->planar         = abuffer->packing_format;
+    inlink->sample_rate    = abuffer->sample_rate;
+
+    filt_ctx->filter->uninit(filt_ctx);
+    memset(filt_ctx->priv, 0, filt_ctx->filter->priv_size);
+    if ((ret = filt_ctx->filter->init(filt_ctx, NULL , NULL)) < 0)
+        return ret;
+    if ((ret = inlink->srcpad->config_props(inlink)) < 0)
+        return ret;
+    return outlink->srcpad->config_props(outlink);
+}
+
+static int insert_filter(BufferSourceContext *abuffer,
+                         AVFilterLink *link, AVFilterContext **filt_ctx,
+                         const char *filt_name)
+{
+    int ret;
+
+    if ((ret = avfilter_open(filt_ctx, avfilter_get_by_name(filt_name), NULL)) < 0)
+        return ret;
+
+    link->src->outputs[0] = NULL;
+    if ((ret = avfilter_link(link->src, 0, *filt_ctx, 0)) < 0) {
+        link->src->outputs[0] = link;
+        return ret;
+    }
+
+    set_link_source(*filt_ctx, link);
+
+    if ((ret = reconfigure_filter(abuffer, *filt_ctx)) < 0) {
+        avfilter_free(*filt_ctx);
+        return ret;
+    }
+
+    return 0;
+}
+
+static void remove_filter(AVFilterContext **filt_ctx)
+{
+    AVFilterLink *outlink = (*filt_ctx)->outputs[0];
+    AVFilterContext *src  = (*filt_ctx)->inputs[0]->src;
+
+    (*filt_ctx)->outputs[0] = NULL;
+    avfilter_free(*filt_ctx);
+    *filt_ctx = NULL;
+
+    set_link_source(src, outlink);
+}
+
+static inline void log_input_change(void *ctx, AVFilterLink *link, AVFilterBufferRef *ref)
+{
+    char old_layout_str[16], new_layout_str[16];
+    av_get_channel_layout_string(old_layout_str, sizeof(old_layout_str),
+                                 -1, link->channel_layout);
+    av_get_channel_layout_string(new_layout_str, sizeof(new_layout_str),
+                                 -1, ref->audio->channel_layout);
+    av_log(ctx, AV_LOG_INFO,
+           "Audio input format changed: "
+           "%s:%s:%d -> %s:%s:%d, normalizing\n",
+           av_get_sample_fmt_name(link->format),
+           old_layout_str, (int)link->sample_rate,
+           av_get_sample_fmt_name(ref->format),
+           new_layout_str, ref->audio->sample_rate);
+}
+
+int av_asrc_buffer_add_audio_buffer_ref(AVFilterContext *ctx,
+                                        AVFilterBufferRef *samplesref,
+                                        int av_unused flags)
+{
+    BufferSourceContext *abuffer = ctx->priv;
+    AVFilterLink *link;
+    int ret, logged = 0;
+
+    if (av_fifo_space(abuffer->fifo) < sizeof(samplesref)) {
+        av_log(ctx, AV_LOG_ERROR,
+               "Buffering limit reached. Please consume some available frames "
+               "before adding new ones.\n");
+        return AVERROR(EINVAL);
+    }
+
+    // Normalize input
+
+    link = ctx->outputs[0];
+    if (samplesref->audio->sample_rate != link->sample_rate) {
+
+        log_input_change(ctx, link, samplesref);
+        logged = 1;
+
+        abuffer->sample_rate = samplesref->audio->sample_rate;
+
+        if (!abuffer->aresample) {
+            ret = insert_filter(abuffer, link, &abuffer->aresample, "aresample");
+            if (ret < 0) return ret;
+        } else {
+            link = abuffer->aresample->outputs[0];
+            if (samplesref->audio->sample_rate == link->sample_rate)
+                remove_filter(&abuffer->aresample);
+            else
+                if ((ret = reconfigure_filter(abuffer, abuffer->aresample)) < 0)
+                    return ret;
+        }
+    }
+
+    link = ctx->outputs[0];
+    if (samplesref->format                != link->format         ||
+        samplesref->audio->channel_layout != link->channel_layout ||
+        samplesref->audio->planar         != link->planar) {
+
+        if (!logged) log_input_change(ctx, link, samplesref);
+
+        abuffer->sample_format  = samplesref->format;
+        abuffer->channel_layout = samplesref->audio->channel_layout;
+        abuffer->packing_format = samplesref->audio->planar;
+
+        if (!abuffer->aconvert) {
+            ret = insert_filter(abuffer, link, &abuffer->aconvert, "aconvert");
+            if (ret < 0) return ret;
+        } else {
+            link = abuffer->aconvert->outputs[0];
+            if (samplesref->format                == link->format         &&
+                samplesref->audio->channel_layout == link->channel_layout &&
+                samplesref->audio->planar         == link->planar
+               )
+                remove_filter(&abuffer->aconvert);
+            else
+                if ((ret = reconfigure_filter(abuffer, abuffer->aconvert)) < 0)
+                    return ret;
+        }
+    }
+
+    if (sizeof(samplesref) != av_fifo_generic_write(abuffer->fifo, &samplesref,
+                                                    sizeof(samplesref), NULL)) {
+        av_log(ctx, AV_LOG_ERROR, "Error while writing to FIFO\n");
+        return AVERROR(EINVAL);
+    }
+
+    return 0;
+}
+
+int av_asrc_buffer_add_samples(AVFilterContext *ctx,
+                               uint8_t *data[8], int linesize[8],
+                               int nb_samples, int sample_rate,
+                               int sample_fmt, int64_t channel_layout, int planar,
+                               int64_t pts, int av_unused flags)
+{
+    AVFilterBufferRef *samplesref;
+
+    samplesref = avfilter_get_audio_buffer_ref_from_arrays(
+                     data, linesize, AV_PERM_WRITE,
+                     nb_samples,
+                     sample_fmt, channel_layout, planar);
+    if (!samplesref)
+        return AVERROR(ENOMEM);
+
+    samplesref->buf->free  = buf_free;
+    samplesref->pts = pts;
+    samplesref->audio->sample_rate = sample_rate;
+
+    return av_asrc_buffer_add_audio_buffer_ref(ctx, samplesref, 0);
+}
+
+int av_asrc_buffer_add_buffer(AVFilterContext *ctx,
+                              uint8_t *buf, int buf_size, int sample_rate,
+                              int sample_fmt, int64_t channel_layout, int planar,
+                              int64_t pts, int av_unused flags)
+{
+    uint8_t *data[8] = {0};
+    int linesize[8];
+    int nb_channels = av_get_channel_layout_nb_channels(channel_layout),
+        nb_samples  = buf_size / nb_channels / av_get_bytes_per_sample(sample_fmt);
+
+    av_samples_fill_arrays(data, linesize,
+                           buf, nb_channels, nb_samples,
+                           sample_fmt, 16);
+
+    return av_asrc_buffer_add_samples(ctx,
+                                      data, linesize, nb_samples,
+                                      sample_rate,
+                                      sample_fmt, channel_layout, planar,
+                                      pts, flags);
+}
+
+AVFilter avfilter_vsrc_buffer = {
+    .name      = "buffer",
+    .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them accessible to the filterchain."),
+    .priv_size = sizeof(BufferSourceContext),
+    .query_formats = query_formats_video,
+
+    .init      = init_video,
+    .uninit    = uninit,
+
+    .inputs    = (const AVFilterPad[]) {{ .name = NULL }},
+    .outputs   = (const AVFilterPad[]) {{ .name      = "default",
+                                    .type            = AVMEDIA_TYPE_VIDEO,
+                                    .request_frame   = request_frame,
+                                    .poll_frame      = poll_frame,
+                                    .config_props    = config_output_video, },
+                                  { .name = NULL}},
+};
+
+#ifdef CONFIG_ABUFFER_FILTER
+
+AVFilter avfilter_asrc_abuffer = {
+    .name        = "abuffer",
+    .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them accessible to the filterchain."),
+    .priv_size   = sizeof(BufferSourceContext),
+    .query_formats = query_formats_audio,
+
+    .init        = init_audio,
+    .uninit      = uninit,
+
+    .inputs      = (const AVFilterPad[]) {{ .name = NULL }},
+    .outputs     = (const AVFilterPad[]) {{ .name      = "default",
+                                      .type            = AVMEDIA_TYPE_AUDIO,
+                                      .request_frame   = request_frame,
+                                      .poll_frame      = poll_frame,
+                                      .config_props    = config_output_audio, },
+                                    { .name = NULL}},
+};
+
+#endif