From 45d1510e4e9fcaeb5781c78f7927555b569079cd Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Sun, 10 Nov 2013 23:17:04 +0100
Subject: af_lavrresample: add support for non-interleaved audio

---
 audio/filter/af_lavrresample.c | 72 ++++++++++++++++++++++++++----------------
 1 file changed, 45 insertions(+), 27 deletions(-)

(limited to 'audio')

diff --git a/audio/filter/af_lavrresample.c b/audio/filter/af_lavrresample.c
index a6abd32aed..8c7a7543fa 100644
--- a/audio/filter/af_lavrresample.c
+++ b/audio/filter/af_lavrresample.c
@@ -24,6 +24,8 @@
 #include <stdlib.h>
 #include <string.h>
 #include <inttypes.h>
+#include <assert.h>
+
 #include <libavutil/opt.h>
 #include <libavutil/audioconvert.h>
 #include <libavutil/common.h>
@@ -244,10 +246,8 @@ static int control(struct af_instance *af, int cmd, void *arg)
 
         if (af_to_avformat(in->format) == AV_SAMPLE_FMT_NONE)
             mp_audio_set_format(in, AF_FORMAT_FLOAT_NE);
-        mp_audio_force_interleaved_format(in);
         if (af_to_avformat(out->format) == AV_SAMPLE_FMT_NONE)
             mp_audio_set_format(out, in->format);
-        mp_audio_force_interleaved_format(out);
 
         af->mul     = (double) (out->rate * out->nch) / (in->rate * in->nch);
         af->delay   = out->nch * s->opts.filter_size / FFMIN(af->mul, 1);
@@ -301,38 +301,51 @@ static bool needs_reorder(int *reorder, int num_ch)
     return false;
 }
 
+static void reorder_planes(struct mp_audio *mpa, int *reorder)
+{
+    struct mp_audio prev = *mpa;
+    for (int n = 0; n < mpa->num_planes; n++) {
+        assert(reorder[n] >= 0 && reorder[n] < mpa->num_planes);
+        mpa->planes[n] = prev.planes[reorder[n]];
+    }
+}
+
+#if !USE_SET_CHANNEL_MAPPING
+static void do_reorder(struct mp_audio *mpa, int *reorder)
+{
+    if (af_fmt_is_planar(mpa->format)) {
+        reorder_planes(mpa, reorder);
+    } else {
+        reorder_channels(mpa->planes[0], reorder, mpa->bps, mpa->nch, mpa->samples);
+    }
+}
+#endif
+
 static struct mp_audio *play(struct af_instance *af, struct mp_audio *data)
 {
     struct af_resample *s = af->priv;
     struct mp_audio *in   = data;
     struct mp_audio *out  = af->data;
 
-
-    int in_samples  = data->samples;
-    int in_size     = data->samples * data->sstride;
-    int out_samples = avresample_available(s->avrctx) +
-        av_rescale_rnd(get_delay(s) + in_samples,
+    out->samples = avresample_available(s->avrctx) +
+        av_rescale_rnd(get_delay(s) + in->samples,
                        s->ctx.out_rate, s->ctx.in_rate, AV_ROUND_UP);
-    int out_size    = out_samples * out->sstride;
 
-    if (talloc_get_size(out->planes[0]) < out_size)
-        out->planes[0] = talloc_realloc_size(out, out->planes[0], out_size);
+    mp_audio_realloc_min(out, out->samples);
 
     af->delay = out->bps * av_rescale_rnd(get_delay(s),
                                           s->ctx.out_rate, s->ctx.in_rate,
                                           AV_ROUND_UP);
 
-#if USE_SET_CHANNEL_MAPPING
-    (void)in_size;
-#else
-    reorder_channels(data->planes[0], s->reorder_in, data->bps, data->nch, in_samples);
+#if !USE_SET_CHANNEL_MAPPING
+    do_reorder(in, s->reorder_in);
 #endif
 
-    if (out_samples) {
-        out_samples = avresample_convert(s->avrctx,
-            (uint8_t **) out->planes, out_size, out_samples,
-            (uint8_t **) in->planes,  in_size,  in_samples);
-        if (out_samples < 0)
+    if (out->samples) {
+        out->samples = avresample_convert(s->avrctx,
+            (uint8_t **) out->planes, out->samples * out->sstride, out->samples,
+            (uint8_t **) in->planes,  in->samples  * in->sstride,  in->samples);
+        if (out->samples < 0)
             return NULL; // error
     }
 
@@ -340,18 +353,23 @@ static struct mp_audio *play(struct af_instance *af, struct mp_audio *data)
 
 #if USE_SET_CHANNEL_MAPPING
     if (needs_reorder(s->reorder_out, out->nch)) {
-        if (talloc_get_size(s->reorder_buffer) < out_size)
-            s->reorder_buffer = talloc_realloc_size(s, s->reorder_buffer, out_size);
-        data->planes[0] = s->reorder_buffer;
-        out_samples = avresample_convert(s->avrctx_out,
-                (uint8_t **) data->planes, out_size, out_samples,
-                (uint8_t **) out->planes, out_size, out_samples);
+        if (af_fmt_is_planar(out->format)) {
+            reorder_planes(data, s->reorder_out);
+        } else {
+            int out_size = out->samples * out->sstride;
+            if (talloc_get_size(s->reorder_buffer) < out_size)
+                s->reorder_buffer = talloc_realloc_size(s, s->reorder_buffer, out_size);
+            data->planes[0] = s->reorder_buffer;
+            int out_samples = avresample_convert(s->avrctx_out,
+                    (uint8_t **) data->planes, out_size, out->samples,
+                    (uint8_t **) out->planes, out_size, out->samples);
+            assert(out_samples == data->samples);
+        }
     }
 #else
-    reorder_channels(data->planes[0], s->reorder_out, out->bps, out->nch, out_samples);
+    do_reorder(data, s->reorder_out);
 #endif
 
-    data->samples = out_samples;
     return data;
 }
 
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