[FFmpeg-devel] [PATCH] libavcodec/mmaldec.c: add interlaced_frame and format struct to AVFrame for deinterlacing

[Jens Ziller]

Hello,

deinterlacing need frame->interlaced_frame and format struct. This
patch added this to AVFrame.

Regards Jens.
From 8a8961a4fab0da2bd98ef6cbfaf55462a00d3450 Mon Sep 17 00:00:00 2001
From: Jens Ziller <zille...@gmx.de>
Date: Fri, 24 Jun 2016 18:18:12 +0200
Subject: [PATCH] for deinterlacing needed

---
 libavcodec/mmaldec.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/libavcodec/mmaldec.c b/libavcodec/mmaldec.c
index 099a8c5..b38a3bd 100644
--- a/libavcodec/mmaldec.c
+++ b/libavcodec/mmaldec.c
@@ -88,6 +88,7 @@ typedef struct MMALDecodeContext {
     int eos_received;
     int eos_sent;
     int extradata_sent;
+    int interlaced_frame;
 } MMALDecodeContext;
 
 // Assume decoder is guaranteed to produce output after at least this many
@@ -274,6 +275,7 @@ static int ffmal_update_format(AVCodecContext *avctx)
     int ret = 0;
     MMAL_COMPONENT_T *decoder = ctx->decoder;
     MMAL_ES_FORMAT_T *format_out = decoder->output[0]->format;
+    MMAL_PARAMETER_VIDEO_INTERLACE_TYPE_T interlace_type;
 
     ffmmal_poolref_unref(ctx->pool_out);
     if (!(ctx->pool_out = av_mallocz(sizeof(*ctx->pool_out)))) {
@@ -300,6 +302,15 @@ static int ffmal_update_format(AVCodecContext *avctx)
     if ((status = mmal_port_format_commit(decoder->output[0])))
         goto fail;
 
+    interlace_type.hdr.id = MMAL_PARAMETER_VIDEO_INTERLACE_TYPE;
+    interlace_type.hdr.size = sizeof(MMAL_PARAMETER_VIDEO_INTERLACE_TYPE_T);
+    status = mmal_port_parameter_get(decoder->output[0], &interlace_type.hdr);
+    if (status != MMAL_SUCCESS) {
+        av_log(avctx, AV_LOG_ERROR, "Cannot read MMAL interlace information!\n");
+    } else {
+        ctx->interlaced_frame = !(interlace_type.eMode == MMAL_InterlaceProgressive);
+    }
+
     if ((ret = ff_set_dimensions(avctx, format_out->es->video.crop.x + format_out->es->video.crop.width,
                                         format_out->es->video.crop.y + format_out->es->video.crop.height)) < 0)
         goto fail;
@@ -609,8 +620,13 @@ static int ffmal_copy_frame(AVCodecContext *avctx,  AVFrame *frame,
     MMALDecodeContext *ctx = avctx->priv_data;
     int ret = 0;
 
+    frame->interlaced_frame = ctx->interlaced_frame;
+
     if (avctx->pix_fmt == AV_PIX_FMT_MMAL) {
         if (!ctx->pool_out)
+        // in data[2] give the format struct for configure deinterlacer and renderer
+        frame->data[2] = ctx->decoder->output[0]->format;
+
             return AVERROR_UNKNOWN; // format change code failed with OOM previously
 
         if ((ret = ff_decode_frame_props(avctx, frame)) < 0)
-- 
2.7.3


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