extern "C" {
#include <libavfilter/buffersink.h>
#include <libavfilter/buffersrc.h>
+#include <libavutil/channel_layout.h>
+#include <libavutil/opt.h>
}
+#include <iostream>
#include "i18n.h"
using std::string;
using std::cout;
-using boost::shared_ptr;
+using std::shared_ptr;
AudioFilterGraph::AudioFilterGraph (int sample_rate, int channels)
: _sample_rate (sample_rate)
string
AudioFilterGraph::src_parameters () const
{
- SafeStringStream a;
+ char layout[64];
+ av_get_channel_layout_string (layout, sizeof(layout), 0, _channel_layout);
- char buffer[64];
- av_get_channel_layout_string (buffer, sizeof(buffer), 0, _channel_layout);
+ char buffer[256];
+ snprintf (
+ buffer, sizeof(buffer), "time_base=1/1:sample_rate=%d:sample_fmt=%s:channel_layout=%s",
+ _sample_rate, av_get_sample_fmt_name(AV_SAMPLE_FMT_FLTP), layout
+ );
- a << "time_base=1/1:sample_rate=" << _sample_rate << ":"
- << "sample_fmt=" << av_get_sample_fmt_name(AV_SAMPLE_FMT_FLTP) << ":"
- << "channel_layout=" << buffer;
-
- return a.str ();
+ return buffer;
}
-void *
-AudioFilterGraph::sink_parameters () const
-{
- AVABufferSinkParams* sink_params = av_abuffersink_params_alloc ();
-
- AVSampleFormat* sample_fmts = new AVSampleFormat[2];
- sample_fmts[0] = AV_SAMPLE_FMT_FLTP;
- sample_fmts[1] = AV_SAMPLE_FMT_NONE;
- sink_params->sample_fmts = sample_fmts;
- int64_t* channel_layouts = new int64_t[2];
- channel_layouts[0] = _channel_layout;
- channel_layouts[1] = -1;
- sink_params->channel_layouts = channel_layouts;
+void
+AudioFilterGraph::set_parameters (AVFilterContext* context) const
+{
+ AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE };
+ int r = av_opt_set_int_list (context, "sample_fmts", sample_fmts, AV_SAMPLE_FMT_NONE, AV_OPT_SEARCH_CHILDREN);
+ DCPOMATIC_ASSERT (r >= 0);
- sink_params->sample_rates = new int[2];
- sink_params->sample_rates[0] = _sample_rate;
- sink_params->sample_rates[1] = -1;
+ int64_t channel_layouts[] = { _channel_layout, -1 };
+ r = av_opt_set_int_list (context, "channel_layouts", channel_layouts, -1, AV_OPT_SEARCH_CHILDREN);
+ DCPOMATIC_ASSERT (r >= 0);
- return sink_params;
+ int sample_rates[] = { _sample_rate, -1 };
+ r = av_opt_set_int_list (context, "sample_rates", sample_rates, -1, AV_OPT_SEARCH_CHILDREN);
+ DCPOMATIC_ASSERT (r >= 0);
}
+
string
AudioFilterGraph::src_name () const
{
void
AudioFilterGraph::process (shared_ptr<const AudioBuffers> buffers)
{
+ DCPOMATIC_ASSERT (buffers->frames() > 0);
int const process_channels = av_get_channel_layout_nb_channels (_channel_layout);
DCPOMATIC_ASSERT (process_channels >= buffers->channels());
if (r < 0) {
char buffer[256];
av_strerror (r, buffer, sizeof(buffer));
- throw DecodeError (String::compose (N_("could not push buffer into filter chain (%1)"), buffer));
+ throw DecodeError (String::compose (N_("could not push buffer into filter chain (%1)"), &buffer[0]));
}
while (true) {