avcodec/dsddec: add slice threading support

1 files changed, 32 insertions, 15 deletions

diff --git a/libavcodec/dsddec.c b/libavcodec/dsddec.c
index 2c5c357acc..7c3ae15768 100644
--- a/libavcodec/dsddec.c
+++ b/libavcodec/dsddec.c
@@ -61,17 +61,20 @@ static av_cold int decode_init(AVCodecContext *avctx)
     return 0;
 }
 
-static int decode_frame(AVCodecContext *avctx, void *data,
-                        int *got_frame_ptr, AVPacket *avpkt)
+typedef struct ThreadData {
+    AVFrame *frame;
+    AVPacket *avpkt;
+} ThreadData;
+
+static int dsd_channel(AVCodecContext *avctx, void *tdata, int j, int threadnr)
 {
-    DSDContext * s = avctx->priv_data;
-    AVFrame *frame = data;
-    int ret, i;
     int lsbf = avctx->codec_id == AV_CODEC_ID_DSD_LSBF || avctx->codec_id == AV_CODEC_ID_DSD_LSBF_PLANAR;
-    int src_next;
-    int src_stride;
-
-    frame->nb_samples = avpkt->size / avctx->channels;
+    DSDContext *s = avctx->priv_data;
+    ThreadData *td = tdata;
+    AVFrame *frame = td->frame;
+    AVPacket *avpkt = td->avpkt;
+    int src_next, src_stride;
+    float *dst = ((float **)frame->extended_data)[j];
 
     if (avctx->codec_id == AV_CODEC_ID_DSD_LSBF_PLANAR || avctx->codec_id == AV_CODEC_ID_DSD_MSBF_PLANAR) {
         src_next   = frame->nb_samples;
@@ -81,15 +84,28 @@ static int decode_frame(AVCodecContext *avctx, void *data,
         src_stride = avctx->channels;
     }
 
+    ff_dsd2pcm_translate(&s[j], frame->nb_samples, lsbf,
+                         avpkt->data + j * src_next, src_stride,
+                         dst, 1);
+
+    return 0;
+}
+
+static int decode_frame(AVCodecContext *avctx, void *data,
+                        int *got_frame_ptr, AVPacket *avpkt)
+{
+    ThreadData td;
+    AVFrame *frame = data;
+    int ret;
+
+    frame->nb_samples = avpkt->size / avctx->channels;
+
     if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
         return ret;
 
-    for (i = 0; i < avctx->channels; i++) {
-        float * dst = ((float **)frame->extended_data)[i];
-        ff_dsd2pcm_translate(&s[i], frame->nb_samples, lsbf,
-            avpkt->data + i * src_next, src_stride,
-            dst, 1);
-    }
+    td.frame = frame;
+    td.avpkt = avpkt;
+    avctx->execute2(avctx, dsd_channel, &td, NULL, avctx->channels);
 
     *got_frame_ptr = 1;
     return frame->nb_samples * avctx->channels;
@@ -103,6 +119,7 @@ AVCodec ff_##name_##_decoder = { \
     .id           = AV_CODEC_ID_##id_, \
     .init         = decode_init, \
     .decode       = decode_frame, \
+    .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS, \
     .sample_fmts  = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_FLTP, \
                                                    AV_SAMPLE_FMT_NONE }, \
 };