Author: kdub
Date: Thu Jul 2 14:29:37 2009
New Revision: 4567
Log:
A source filter, and somewhat working example of usage of the library
Modified:
afilters/af_null.c
afilters/avfilter.c
afilters/avfilter.h
afilters/dummy.c
Modified: afilters/af_null.c
==============================================================================
--- afilters/af_null.c Wed Jul 1 19:45:17 2009 (r4566)
+++ afilters/af_null.c Thu Jul 2 14:29:37 2009 (r4567)
@@ -21,42 +21,5 @@
* null filter
*/
-#include <stdio.h>
-#include "avfilter.h"
-
-
-typedef struct
-{
- int history[100]; /*just an example */
-} af_null_priv_t;
-
-static int start_buf(AVFilterLink *link, AVFilterSamplesRef *sample_ref)
-{
- av_log(0,0, "Starting buffer\n");
- return;
-}
-
-static int end_buf(AVFilterLink *link, AVFilterSamplesRef *sample_ref)
-{
- av_log(0,0, "Ending buffer\n");
- return;
-}
-
-AVFilter avfilter_af_null =
-{
- .name = "audio_null",
-
- .priv_size = sizeof(af_null_priv_t),
-
- .inputs = (AVFilterPad[]) {{ .name = "default",
- .type = CODEC_TYPE_AUDIO,
- .start_buffer = start_buf,
- .end_buffer = end_buf },
- { .name = NULL}},
-
- .outputs = (AVFilterPad[]) {{ .name = "default",
- .type = CODEC_TYPE_AUDIO, },
- { .name = NULL}},
-};
Modified: afilters/avfilter.c
==============================================================================
--- afilters/avfilter.c Wed Jul 1 19:45:17 2009 (r4566)
+++ afilters/avfilter.c Thu Jul 2 14:29:37 2009 (r4567)
@@ -85,6 +85,7 @@ int avfilter_link(AVFilterContext *src,
src->outputs[srcpad] || dst->inputs[dstpad])
return -1;
+ av_log(0,0,"src is %X, dst is %X\n",src, dst);
src->outputs[srcpad] =
dst-> inputs[dstpad] = link = av_mallocz(sizeof(AVFilterLink));
@@ -92,8 +93,19 @@ int avfilter_link(AVFilterContext *src,
link->dst = dst;
link->srcpad = srcpad;
link->dstpad = dstpad;
+
+
link->format = PIX_FMT_NONE;
+ /* FIXME shouldnt do static buffer alloc like this really, should be
+ variable */
+ link->link_size = 128;
+ link->srcbuf = (AVFilterBufferRef*) av_malloc(sizeof(AVFilterBufferRef));
+ link->srcbuf->buffer = (AVFilterBuffer*) av_malloc(sizeof(AVFilterBuffer));
+ link->srcbuf->buffer->data = (int16_t*) av_malloc(link->link_size *
+ sizeof(int16_t));
+ link->srcbuf->buffer->n_samples = link->link_size;
+
return 0;
}
@@ -131,7 +143,7 @@ int avfilter_config_links(AVFilterContex
for(i = 0; i < filter->input_count; i ++) {
AVFilterLink *link = filter->inputs[i];
-
+ av_log(0,0,"link is %x\n", filter->inputs[i]);
if(!link) continue;
switch(link->init_state) {
@@ -231,23 +243,40 @@ void avfilter_start_frame(AVFilterLink *
start_frame(link, link->cur_pic);
}
-void avfilter_start_buffer(AVFilterLink *link, AVFilterSamplesRef *sample_ref)
+void avfilter_filter_buffer(AVFilterLink *link, AVFilterBufferRef *sample_ref)
{
- void (*start_buf) (AVFilterLink *, AVFilterSamplesRef *);
- AVFilterPad *dst = &link_dpad(link);
+ void (*filter_input_buffer) (AVFilterLink *, AVFilterBufferRef *);
+ void (*filter_output_buffer) (AVFilterLink *, AVFilterBufferRef *);
- if (!(start_buf = dst->start_buffer))
+ AVFilterPad *src = &link->src->output_pads[link->srcpad];
+ AVFilterPad *dst = &link->dst->input_pads[link->dstpad];
+
+ int input_func = 1, output_func = 1;
+
+ if (!(filter_output_buffer = dst->filter_buffer))
{
- av_log(0,0,"it is %x\n", 0);
- start_buf = NULL; /* FIXME: should have a default function pointer
+ av_log(0,0,"LINK HAS NO OUTPUT?\n", 0);
+ filter_output_buffer = NULL; /* FIXME: should have a default function
pointer
like avfilter_default_start_buffer */
+ output_func = 0;
}
+ if (!(filter_input_buffer = src->filter_buffer))
+ {
+ av_log(0,0,"LINK HAS NO INPUT?\n", 0);
+ filter_input_buffer = NULL; /* FIXME: should have a default function
pointer
+ like avfilter_default_start_buffer */
+ input_func = 0;
+ }
- av_log(0,0,"it is %x\n", start_buf);
+ //av_log(0,0,"it is %x\n", filter_buffer);
link->cur_buf = sample_ref;
- start_buf(link, link->cur_pic);
+ if (output_func)
+ filter_output_buffer(link, link->srcbuf);
+
+ if (input_func)
+ filter_input_buffer(link, link->srcbuf);
}
Modified: afilters/avfilter.h
==============================================================================
--- afilters/avfilter.h Wed Jul 1 19:45:17 2009 (r4566)
+++ afilters/avfilter.h Thu Jul 2 14:29:37 2009 (r4567)
@@ -104,30 +104,29 @@ typedef struct AVFilterPicRef
/* two structures that contain the data to be processed for the audio buf */
/* contains samples. audio analogue to AVFilterPic */
-typedef struct AVFilterSamples
+typedef struct AVFilterBuffer
{
/* data */
void *data;
int data_size; /* data size in bytes */
int n_samples;
- void *priv;
- void (*free)(struct AVFilterSamples *samples);
+ void (*free)(struct AVFilterBuffer *samples);
-}AVFilterSamples;
+}AVFilterBuffer;
/**
* A reference to an audio buffer. contains info about the AVFilterSamples
* Do not use AVFilterSamples directly
*/
-typedef struct AVFilterSamplesRef
+typedef struct AVFilterBufferRef
{
- AVFilterSamples *samples;
+ AVFilterBuffer *buffer;
int sample_type; /* contains type of sample in the buffer*/
int sample_rate;
-}AVFilterSamplesRef;
+}AVFilterBufferRef;
@@ -381,12 +380,10 @@ struct AVFilterPad
/**
- * Process an audio buffer. This function is where the audio filter should
- * recieve and process data
+ * Process an audio buffer. Filters can hook into this function to do the
+ * actual audio processing
*/
- int (*start_buffer)(AVFilterLink *link, AVFilterSamplesRef *sample_ref);
-
- int (*end_buffer)(AVFilterLink *link, AVFilterSamplesRef *sample_ref);
+ int (*filter_buffer)(AVFilterLink *link, AVFilterBufferRef *sample_ref);
};
@@ -513,14 +510,14 @@ struct AVFilterLink
* filters.
*/
AVFilterPicRef *srcpic;
-
AVFilterPicRef *cur_pic;
AVFilterPicRef *outpic;
/** the audio buffer reference is sent accross the link by the source. */
- AVFilterSamplesRef *srcbuf;
- AVFilterSamplesRef *cur_buf;
- AVFilterSamplesRef *outbuf;
+ AVFilterBufferRef *srcbuf;
+ int link_size; /* size of data sent accross link each time */
+ AVFilterBufferRef *cur_buf;
+ AVFilterBufferRef *outbuf;
};
/**
@@ -535,7 +532,8 @@ int avfilter_link(AVFilterContext *src,
AVFilterContext *dst, unsigned dstpad);
/**
- * Negotiates the colorspace, dimensions, etc of all inputs to a filter.
+ * Negotiates the colorspace, dimensions, etc (video) or the
+* samplerate, sample, format, etc (audio) of all inputs to a filter.
* @param filter the filter to negotiate the properties for its inputs
* @return zero on successful negotiation
*/
Modified: afilters/dummy.c
==============================================================================
--- afilters/dummy.c Wed Jul 1 19:45:17 2009 (r4566)
+++ afilters/dummy.c Thu Jul 2 14:29:37 2009 (r4567)
@@ -1,10 +1,214 @@
/* temporary development file for avfilters
* (c) 2009 Kevin DuBois <kdub...@gmail.com>
+* GPL v2
*/
-#include "af_null.c" /*FIXME: bad, i know. prototyping :) */
+#include <stdio.h>
+#include "avfilter.h"
+
+typedef struct
+{
+ int history[100]; /*just an example */
+
+} af_null_priv_t;
+
+
+static int filter(AVFilterLink *link, AVFilterBufferRef *sample_ref)
+{
+ av_log(0,0, "Filter buffer\n");
+ int num_samples = sample_ref->buffer->n_samples;
+ int i;
+
+ int16_t *data;
+ data = (int16_t*) sample_ref->buffer->data;
+ for (i=0; i < num_samples; i++)
+ {
+ data[i] = data[i] +1;
+ }
+
+ return 0;
+}
+
+AVFilter avfilter_af_null =
+{
+ .name = "audio_null",
+
+ .priv_size = sizeof(af_null_priv_t),
+
+ .inputs = (AVFilterPad[]) {{ .name = "default",
+ .type = CODEC_TYPE_AUDIO,
+ .filter_buffer = filter },
+ { .name = NULL}},
+
+ .outputs = (AVFilterPad[]) {{ .name = "default",
+ .type = CODEC_TYPE_AUDIO, },
+ { .name = NULL}},
+};
+
+
+typedef struct
+{
+ int first_used;
+ int last_used;
+
+ AVFilterBufferRef buf_ref;
+
+} af_src_priv_t;
+
+static int av_asrc_buffer_add_samples(AVFilterContext *ctx,
+ AVFilterBufferRef * samples)
+{
+ printf("LOAD BYTES into SRC\n");
+ af_src_priv_t *priv;
+ priv = ctx->priv;
+
+ printf("last used: %i\n", priv->last_used);
+ /* find the last point in the buffer */
+ int first = priv->first_used;
+ int last = priv->last_used;
+
+ int attempted_load = samples->buffer->n_samples;
+ if (first <= last ) /* buffer has room */
+ {
+ if (attempted_load > priv->buf_ref.buffer->n_samples)
+ {
+ /* error */
+ printf("Error! not enough room\n");
+ return attempted_load - priv->buf_ref.buffer->n_samples;
+ }
+ memcpy(&priv->buf_ref.buffer->data[last] , samples->buffer->data,
attempted_load);
+ priv->last_used = priv->last_used + attempted_load;
+ }
+
+
+ printf("<<<<<<<<Buffer State>>>>>>>>\n");
+ printf("First Used:\t%i\n",priv->first_used);
+ printf("Last Used:\t%i\n", priv->last_used);
+
+}
+
+static int dump_next(AVFilterLink *lnk, AVFilterBufferRef *sample_ref)
+{
+ printf("TAKE BYTES from SRC\n");
+
+ af_src_priv_t *priv;
+ priv = (af_src_priv_t*) lnk->src->priv;
+
+
+ printf("Link size is %i\n", lnk->link_size);
+
+// memcpy(sample_ref, priv->buf_ref.buffer , lnk->link_size);
+
+ /* move samples cursor to next fresh point */
+ priv->first_used = priv->first_used + lnk->link_size;
+
+ printf("<<<<<<<<Buffer State>>>>>>>>\n");
+ printf("First Used:\t%i\n",priv->first_used);
+ printf("Last Used:\t%i\n", priv->last_used);
+
+ printf("dumping buffer\n");
+ return 0;
+
+}
+
+
+static int src_buf_init (AVFilterContext *ctx,
+ const char *args, void *opaque)
+{
+ /* allocate a fixed size for the input buffer */
+ /* arbitrary value, will be modifiable */
+
+ printf("SRC BUF INIT\n");
+ af_src_priv_t *priv;
+ priv = ctx->priv;
+
+ priv->buf_ref.buffer = (AVFilterBuffer*) malloc(sizeof(AVFilterBuffer));
+
+ priv->buf_ref.buffer->n_samples = 1024;
+ priv->buf_ref.buffer->data = (int16_t *)
+ calloc(priv->buf_ref.buffer->n_samples, sizeof(int16_t));
+
+ priv->first_used = 0;
+ priv->last_used = 0;
+
+ return 0;
+}
+
+AVFilter avfilter_af_src =
+{
+ .name = "audio_src",
+
+ .priv_size = 0,
+
+ .init = src_buf_init,
+ .inputs = (AVFilterPad[]) {{.name = NULL}},
+ .outputs = (AVFilterPad[]) { {.name = "default",
+ .type = CODEC_TYPE_AUDIO,
+ .filter_buffer = dump_next},
+ {.name = NULL}}
+
+};
+
+
+#if 0
+int dump_avfiltlink(AVFilterLink *link)
+{
+ if (!link)
+ return 0;
+
+ printf("\tLink dump...\n");
+ printf("\tSource:\t0x%x\n", link->src);
+ printf("\tDest:\t0x%x\n", link->dst);
+
+
+ switch (link->init_state)
+ {
+ case AVLINK_UNINIT:
+ printf("\tState: AVLINK_UNINIT\n");
+ break;
+ case AVLINK_STARTINIT:
+ printf("\tState: AVLINK_STARTINIT\n");
+ break;
+ case AVLINK_INIT:
+ printf("\tState: AVLINK_INIT\n");
+ break;
+ default:
+ printf("\tState: ???\n");
+ break;
+ }
+
+}
+
+int dump_avfiltcont(AVFilterContext *cont)
+{
+ printf("\n--------------AVFILTCONT DUMP-------------\n");
+ if (!cont)
+ {
+ printf("Error, null argument\n");
+ printf("------------END AVFILTCONT DUMP-----------\n\n");
+ return -1;
+ }
+
+ printf("Cont addr:\t%X\n", cont);
+ printf("Class:\t\t%x\n", cont->av_class);
+ printf("Filter:\t\t%x\n", cont->filter);
+ printf("Name:\t\t%s\n", cont->name);
+ printf("Input Count:\t%i\n", cont->input_count);
+ printf("Input Pads:\t%x\n", cont->input_pads);
+ printf("Input Links:\t%x\n", cont->inputs);
+// dump_avfiltlink(cont->inputs[0]);
+ printf("Output Count:\t%i\n", cont->output_count);
+ printf("Output Pads:\t%x\n", cont->output_pads);
+ printf("Output Links:\t%x\n", cont->outputs);
+ dump_avfiltlink(cont->outputs[0]);
+
+ printf("------------END AVFILTCONT DUMP-----------\n\n");
+ return 0;
+}
+#endif
+
int main()
{
@@ -14,56 +218,57 @@ int main()
/* Simulates a 1024 buffer of sl16 audio data */
/* temporary setup, probably a cleaner way i want to do all this */
int16_t * tbuf;
- int i, n_samples = 1024;
+ int i, n_samples = 512;
tbuf = calloc(n_samples, sizeof(int16_t));
for(i=0;i<n_samples;i++)
{
+#define SINEWAVE 0
+#if SINEWAVE
tbuf[i] = (int16_t) 100 * sin(2*3.141/100 * i);
+#else
+ tbuf[i] = i;
+#endif
} // sine wave, period 1024/100, range, 100 -> -100
-
- AVFilterSamples samples;
+ AVFilterBuffer samples;
samples.n_samples = n_samples;
samples.data = tbuf;
samples.data_size = sizeof(int16_t);
-
- AVFilterSamplesRef sample_buf;
- sample_buf.samples = &samples;
+ AVFilterBufferRef sample_buf;
+ sample_buf.buffer = &samples;
sample_buf.sample_type = 10;
sample_buf.sample_rate = 128000;
- /* avfilter context */
- AVFilterContext * avfiltcont;
- AVFilter *avfilt;
+ /* set up source filter */
+ AVFilterContext *src_context=NULL;
+ AVFilter *src_filter;
+ src_filter = &avfilter_af_src;
+ src_context = avfilter_open(src_filter, "filter_src");
+ avfilter_register(src_filter);
- /*set up avfilter */
+ /* set up actual filter */
+ AVFilterContext * avfiltcont=NULL;
+ AVFilter *avfilt;
avfilt = &avfilter_af_null;
-
- /* this should initialize the avfiltcont */
- printf("Opening avfilter\n");
- avfiltcont = avfilter_open(avfilt, "kevinfilter");
- printf("avfilter_open done\n");
-
-
- /* Register filters*/
+ avfiltcont = avfilter_open(avfilt, "filterID1234");
avfilter_register(avfilt);
- /* initialize the filters */
- printf("Starting filter chain\n");
+ /*init filters */
avfilter_init_filter(avfiltcont, NULL, NULL);
+ avfilter_init_filter(src_context, NULL, NULL);
- printf("Alright, we got %i inputs and %i outputs\n",
- avfiltcont->input_count,
- avfiltcont->output_count);
+ /* link filters */
+ avfilter_link(src_context, 0, avfiltcont, 0);
+ avfilter_config_links(src_context);
+ avfilter_config_links(avfiltcont);
- /* run the filter */
- printf("Running filter chain\n");
- /* FIXME: trying to run segfaults :(. didnt set up linking right, i think*/
- avfilter_start_buffer(avfiltcont->inputs, &sample_buf);
- //avfilter_start_buffer(AVFilterLink *link, AVFilterPicRef *picref);
+ /* load some samples in the source filter */
+ av_asrc_buffer_add_samples(src_context, &sample_buf);
+
+ /* run this link */
+ avfilter_filter_buffer(src_context->outputs[0], &sample_buf);
- /* uninit things */
}
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