ffmpeg source update for sep 09

source/patched-ffmpeg-mt/libavfilter/defaults.c

 /*
  * 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 "libavcore/imgutils.h"
+#include "libavcodec/audioconvert.h"
 #include "avfilter.h"
 
 /* TODO: buffer pool.  see comment for avfilter_default_get_video_buffer() */
 static void avfilter_default_free_buffer(AVFilterBuffer *ptr)
 {
     av_free(ptr->data[0]);
     av_free(ptr);
 }
 
 /* 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. */
 AVFilterBufferRef *avfilter_default_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
 {
     AVFilterBuffer *pic = av_mallocz(sizeof(AVFilterBuffer));
-    AVFilterBufferRef *ref = av_mallocz(sizeof(AVFilterBufferRef));
+    AVFilterBufferRef *ref = NULL;
     int i, tempsize;
-    char *buf;
+    char *buf = NULL;
 
-    ref->buf   = pic;
-    ref->w     = w;
-    ref->h     = h;
+    if (!pic || !(ref = av_mallocz(sizeof(AVFilterBufferRef))))
+        goto fail;
+
+    ref->buf         = pic;
+    ref->video       = av_mallocz(sizeof(AVFilterBufferRefVideoProps));
+    ref->video->w    = w;
+    ref->video->h    = h;
 
     /* make sure the buffer gets read permission or it's useless for output */
     ref->perms = perms | AV_PERM_READ;
 
     pic->refcount = 1;
     ref->format   = link->format;
     pic->free     = avfilter_default_free_buffer;
-    av_fill_image_linesizes(pic->linesize, ref->format, ref->w);
+    av_image_fill_linesizes(pic->linesize, ref->format, ref->video->w);
 
-    for (i=0; i<4;i++)
+    for (i = 0; i < 4; i++)
         pic->linesize[i] = FFALIGN(pic->linesize[i], 16);
 
-    tempsize = av_fill_image_pointers(pic->data, ref->format, ref->h, NULL, pic->linesize);
+    tempsize = av_image_fill_pointers(pic->data, ref->format, ref->video->h, NULL, pic->linesize);
     buf = av_malloc(tempsize + 16); // +2 is needed for swscaler, +16 to be
                                     // SIMD-friendly
-    av_fill_image_pointers(pic->data, ref->format, ref->h, buf, pic->linesize);
+    if (!buf)
+        goto fail;
+    av_image_fill_pointers(pic->data, ref->format, ref->video->h, buf, pic->linesize);
 
-    memcpy(ref->data,     pic->data,     4*sizeof(pic->data[0]));
-    memcpy(ref->linesize, pic->linesize, 4*sizeof(pic->linesize[0]));
+    memcpy(ref->data,     pic->data,     sizeof(ref->data));
+    memcpy(ref->linesize, pic->linesize, sizeof(ref->linesize));
 
     return ref;
+
+fail:
+    av_free(buf);
+    if (ref && ref->video)
+        av_free(ref->video);
+    av_free(ref);
+    av_free(pic);
+    return NULL;
+}
+
+AVFilterBufferRef *avfilter_default_get_audio_buffer(AVFilterLink *link, int perms,
+                                                     enum SampleFormat sample_fmt, int size,
+                                                     int64_t channel_layout, int planar)
+{
+    AVFilterBuffer *samples = av_mallocz(sizeof(AVFilterBuffer));
+    AVFilterBufferRef *ref = NULL;
+    int i, sample_size, chans_nb, bufsize, per_channel_size, step_size = 0;
+    char *buf;
+
+    if (!samples || !(ref = av_mallocz(sizeof(AVFilterBufferRef))))
+        goto fail;
+
+    ref->buf                   = samples;
+    ref->format                = sample_fmt;
+
+    ref->audio = av_mallocz(sizeof(AVFilterBufferRefAudioProps));
+    if (!ref->audio)
+        goto fail;
+
+    ref->audio->channel_layout = channel_layout;
+    ref->audio->size           = size;
+    ref->audio->planar         = planar;
+
+    /* make sure the buffer gets read permission or it's useless for output */
+    ref->perms = perms | AV_PERM_READ;
+
+    samples->refcount   = 1;
+    samples->free       = avfilter_default_free_buffer;
+
+    sample_size = av_get_bits_per_sample_format(sample_fmt) >>3;
+    chans_nb = avcodec_channel_layout_num_channels(channel_layout);
+
+    per_channel_size = size/chans_nb;
+    ref->audio->samples_nb = per_channel_size/sample_size;
+
+    /* Set the number of bytes to traverse to reach next sample of a particular channel:
+     * For planar, this is simply the sample size.
+     * For packed, this is the number of samples * sample_size.
+     */
+    for (i = 0; i < chans_nb; i++)
+        samples->linesize[i] = planar > 0 ? per_channel_size : sample_size;
+    memset(&samples->linesize[chans_nb], 0, (8-chans_nb) * sizeof(samples->linesize[0]));
+
+    /* Calculate total buffer size, round to multiple of 16 to be SIMD friendly */
+    bufsize = (size + 15)&~15;
+    buf = av_malloc(bufsize);
+    if (!buf)
+        goto fail;
+
+    /* For planar, set the start point of each channel's data within the buffer
+     * For packed, set the start point of the entire buffer only
+     */
+    samples->data[0] = buf;
+    if (buf && planar) {
+        for (i = 1; i < chans_nb; i++) {
+            step_size += per_channel_size;
+            samples->data[i] = buf + step_size;
+        }
+    } else {
+        for (i = 1; i < chans_nb; i++)
+            samples->data[i] = buf;
+    }
+
+    memset(&samples->data[chans_nb], 0, (8-chans_nb) * sizeof(samples->data[0]));
+
+    memcpy(ref->data,     samples->data,     sizeof(ref->data));
+    memcpy(ref->linesize, samples->linesize, sizeof(ref->linesize));
+
+    return ref;
+
+fail:
+    av_free(buf);
+    if (ref && ref->audio)
+        av_free(ref->audio);
+    av_free(ref);
+    av_free(samples);
+    return NULL;
 }
 
 void avfilter_default_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
 {
     AVFilterLink *out = NULL;
 
-    if(link->dst->output_count)
+    if (link->dst->output_count)
         out = link->dst->outputs[0];
 
-    if(out) {
+    if (out) {
         out->out_buf      = avfilter_get_video_buffer(out, AV_PERM_WRITE, out->w, out->h);
         avfilter_copy_buffer_ref_props(out->out_buf, picref);
         avfilter_start_frame(out, avfilter_ref_buffer(out->out_buf, ~0));
     }
 }
 
 void avfilter_default_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
 {
     AVFilterLink *out = NULL;
 
-    if(link->dst->output_count)
+    if (link->dst->output_count)
         out = link->dst->outputs[0];
 
-    if(out)
+    if (out)
         avfilter_draw_slice(out, y, h, slice_dir);
 }
 
 void avfilter_default_end_frame(AVFilterLink *link)
 {
     AVFilterLink *out = NULL;
 
-    if(link->dst->output_count)
+    if (link->dst->output_count)
         out = link->dst->outputs[0];
 
     avfilter_unref_buffer(link->cur_buf);
     link->cur_buf = NULL;
 
-    if(out) {
-        if(out->out_buf) {
+    if (out) {
+        if (out->out_buf) {
             avfilter_unref_buffer(out->out_buf);
             out->out_buf = NULL;
         }
         avfilter_end_frame(out);
     }
 }
 
+/* FIXME: samplesref is same as link->cur_buf. Need to consider removing the redundant parameter. */
+void avfilter_default_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref)
+{
+    AVFilterLink *outlink = NULL;
+
+    if (link->dst->output_count)
+        outlink = link->dst->outputs[0];
+
+    if (outlink) {
+        outlink->out_buf = avfilter_default_get_audio_buffer(link, AV_PERM_WRITE, samplesref->format,
+                                                             samplesref->audio->size,
+                                                             samplesref->audio->channel_layout,
+                                                             samplesref->audio->planar);
+        outlink->out_buf->pts                = samplesref->pts;
+        outlink->out_buf->audio->sample_rate = samplesref->audio->sample_rate;
+        avfilter_filter_samples(outlink, avfilter_ref_buffer(outlink->out_buf, ~0));
+        avfilter_unref_buffer(outlink->out_buf);
+        outlink->out_buf = NULL;
+    }
+    avfilter_unref_buffer(samplesref);
+    link->cur_buf = NULL;
+}
+
 /**
  * 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;
+    if (link->src->input_count && link->src->inputs[0]) {
+        if (link->type == AVMEDIA_TYPE_VIDEO) {
+            link->w = link->src->inputs[0]->w;
+            link->h = link->src->inputs[0]->h;
+        } else if (link->type == AVMEDIA_TYPE_AUDIO) {
+            link->channel_layout = link->src->inputs[0]->channel_layout;
+            link->sample_rate    = link->src->inputs[0]->sample_rate;
+        }
     } 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]) {
+    for (i = 0; i < ctx->input_count; i++) {
+        if (ctx->inputs[i]) {
             avfilter_formats_ref(formats, &ctx->inputs[i]->out_formats);
-            count ++;
+            count++;
         }
     }
-    for(i = 0; i < ctx->output_count; i ++) {
-        if(ctx->outputs[i]) {
+    for (i = 0; i < ctx->output_count; i++) {
+        if (ctx->outputs[i]) {
             avfilter_formats_ref(formats, &ctx->outputs[i]->in_formats);
-            count ++;
+            count++;
         }
     }
 
-    if(!count) {
+    if (!count) {
         av_free(formats->formats);
         av_free(formats->refs);
         av_free(formats);
     }
 }
 
 int avfilter_default_query_formats(AVFilterContext *ctx)
 {
     enum AVMediaType type = ctx->inputs [0] ? ctx->inputs [0]->type :
                             ctx->outputs[0] ? ctx->outputs[0]->type :
@@ skipping 11 matching lines @@
 void avfilter_null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
 {
     avfilter_draw_slice(link->dst->outputs[0], y, h, slice_dir);
 }
 
 void avfilter_null_end_frame(AVFilterLink *link)
 {
     avfilter_end_frame(link->dst->outputs[0]);
 }
 
+void avfilter_null_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref)
+{
+    avfilter_filter_samples(link->dst->outputs[0], samplesref);
+}
+
 AVFilterBufferRef *avfilter_null_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
 {
     return avfilter_get_video_buffer(link->dst->outputs[0], perms, w, h);
 }
 
+AVFilterBufferRef *avfilter_null_get_audio_buffer(AVFilterLink *link, int perms,
+                                                  enum SampleFormat sample_fmt, int size,
+                                                  int64_t channel_layout, int packed)
+{
+    return avfilter_get_audio_buffer(link->dst->outputs[0], perms, sample_fmt,
+                                     size, channel_layout, packed);
+}
+