Use more designated initializers.

Also remove some pointless NULL/0 assigments.

C++ code must be left as it is because named struct
initializers are not supported by C++ standard.

21 files changed, 107 insertions, 131 deletions

diff --git a/libavcodec/bintext.c b/libavcodec/bintext.c
index df37feea12..0b46dd444e 100644
--- a/libavcodec/bintext.c
+++ b/libavcodec/bintext.c
@@ -211,40 +211,37 @@ static av_cold int decode_end(AVCodecContext *avctx)
 }
 
 AVCodec ff_bintext_decoder = {
-    "bintext",
-    AVMEDIA_TYPE_VIDEO,
-    CODEC_ID_BINTEXT,
-    sizeof(XbinContext),
-    decode_init,
-    NULL,
-    decode_end,
-    decode_frame,
-    CODEC_CAP_DR1,
+    .name           = "bintext",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = CODEC_ID_BINTEXT,
+    .priv_data_size = sizeof(XbinContext),
+    .init           = decode_init,
+    .close          = decode_end,
+    .decode         = decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
     .long_name = NULL_IF_CONFIG_SMALL("Binary text"),
 };
 
 AVCodec ff_xbin_decoder = {
-    "xbin",
-    AVMEDIA_TYPE_VIDEO,
-    CODEC_ID_XBIN,
-    sizeof(XbinContext),
-    decode_init,
-    NULL,
-    decode_end,
-    decode_frame,
-    CODEC_CAP_DR1,
+    .name           = "xbin",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = CODEC_ID_XBIN,
+    .priv_data_size = sizeof(XbinContext),
+    .init           = decode_init,
+    .close          = decode_end,
+    .decode         = decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
     .long_name = NULL_IF_CONFIG_SMALL("eXtended BINary text"),
 };
 
 AVCodec ff_idf_decoder = {
-    "idf",
-    AVMEDIA_TYPE_VIDEO,
-    CODEC_ID_IDF,
-    sizeof(XbinContext),
-    decode_init,
-    NULL,
-    decode_end,
-    decode_frame,
-    CODEC_CAP_DR1,
+    .name           = "idf",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = CODEC_ID_IDF,
+    .priv_data_size = sizeof(XbinContext),
+    .init           = decode_init,
+    .close          = decode_end,
+    .decode         = decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
     .long_name = NULL_IF_CONFIG_SMALL("iCEDraw text"),
 };
diff --git a/libavcodec/diracdec.c b/libavcodec/diracdec.c
index 1ace7bd425..1bc73349e0 100644
--- a/libavcodec/diracdec.c
+++ b/libavcodec/diracdec.c
@@ -1898,7 +1898,6 @@ AVCodec ff_dirac_decoder = {
     .id             = CODEC_ID_DIRAC,
     .priv_data_size = sizeof(DiracContext),
     .init           = dirac_decode_init,
-    .encode         = NULL,
     .close          = dirac_decode_end,
     .decode         = dirac_decode_frame,
     .capabilities   = CODEC_CAP_DELAY,
diff --git a/libavcodec/flashsv2enc.c b/libavcodec/flashsv2enc.c
index 27bd87816b..9f7017e033 100644
--- a/libavcodec/flashsv2enc.c
+++ b/libavcodec/flashsv2enc.c
@@ -894,13 +894,13 @@ static av_cold int flashsv2_encode_end(AVCodecContext * avctx)
 }
 
 AVCodec ff_flashsv2_encoder = {
-    "flashsv2",
-    AVMEDIA_TYPE_VIDEO,
-    CODEC_ID_FLASHSV2,
-    sizeof(FlashSV2Context),
-    flashsv2_encode_init,
-    flashsv2_encode_frame,
-    flashsv2_encode_end,
+    .name           = "flashsv2",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = CODEC_ID_FLASHSV2,
+    .priv_data_size = sizeof(FlashSV2Context),
+    .init           = flashsv2_encode_init,
+    .encode         = flashsv2_encode_frame,
+    .close          = flashsv2_encode_end,
     .pix_fmts = (enum PixelFormat[]) {PIX_FMT_BGR24, PIX_FMT_NONE},
     .long_name = NULL_IF_CONFIG_SMALL("Flash Screen Video Version 2"),
     .capabilities   =  CODEC_CAP_EXPERIMENTAL,
diff --git a/libavcodec/g729dec.c b/libavcodec/g729dec.c
index 4714f19554..191794b6e7 100644
--- a/libavcodec/g729dec.c
+++ b/libavcodec/g729dec.c
@@ -714,14 +714,12 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr,
 
 AVCodec ff_g729_decoder =
 {
-    "g729",
-    AVMEDIA_TYPE_AUDIO,
-    CODEC_ID_G729,
-    sizeof(G729Context),
-    decoder_init,
-    NULL,
-    NULL,
-    decode_frame,
+    .name           = "g729",
+    .type           = AVMEDIA_TYPE_AUDIO,
+    .id             = CODEC_ID_G729,
+    .priv_data_size = sizeof(G729Context),
+    .init           = decoder_init,
+    .decode         = decode_frame,
     .capabilities = CODEC_CAP_DR1,
     .long_name = NULL_IF_CONFIG_SMALL("G.729"),
 };
diff --git a/libavcodec/j2kdec.c b/libavcodec/j2kdec.c
index e35c97d860..d605b13ea7 100644
--- a/libavcodec/j2kdec.c
+++ b/libavcodec/j2kdec.c
@@ -1068,14 +1068,13 @@ static av_cold int decode_end(AVCodecContext *avctx)
 }
 
 AVCodec ff_jpeg2000_decoder = {
-    "j2k",
-    AVMEDIA_TYPE_VIDEO,
-    CODEC_ID_JPEG2000,
-    sizeof(J2kDecoderContext),
-    j2kdec_init,
-    NULL,
-    decode_end,
-    decode_frame,
+    .name           = "j2k",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = CODEC_ID_JPEG2000,
+    .priv_data_size = sizeof(J2kDecoderContext),
+    .init           = j2kdec_init,
+    .close          = decode_end,
+    .decode         = decode_frame,
     .capabilities = CODEC_CAP_EXPERIMENTAL,
     .long_name = NULL_IF_CONFIG_SMALL("JPEG 2000"),
     .pix_fmts =
diff --git a/libavcodec/j2kenc.c b/libavcodec/j2kenc.c
index 58789c9a86..37e31a9c69 100644
--- a/libavcodec/j2kenc.c
+++ b/libavcodec/j2kenc.c
@@ -1036,13 +1036,13 @@ static int j2kenc_destroy(AVCodecContext *avctx)
 }
 
 AVCodec ff_jpeg2000_encoder = {
-    "j2k",
-    AVMEDIA_TYPE_VIDEO,
-    CODEC_ID_JPEG2000,
-    sizeof(J2kEncoderContext),
-    j2kenc_init,
-    encode_frame,
-    j2kenc_destroy,
+    .name           = "j2k",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = CODEC_ID_JPEG2000,
+    .priv_data_size = sizeof(J2kEncoderContext),
+    .init           = j2kenc_init,
+    .encode         = encode_frame,
+    .close          = j2kenc_destroy,
     .capabilities= CODEC_CAP_EXPERIMENTAL,
     .long_name = NULL_IF_CONFIG_SMALL("JPEG 2000"),
     .pix_fmts =
diff --git a/libavcodec/libaacplus.c b/libavcodec/libaacplus.c
index a5ededbf39..3ab4e0362c 100644
--- a/libavcodec/libaacplus.c
+++ b/libavcodec/libaacplus.c
@@ -122,13 +122,13 @@ static av_cold int aacPlus_encode_close(AVCodecContext *avctx)
 }
 
 AVCodec ff_libaacplus_encoder = {
-    "libaacplus",
-    AVMEDIA_TYPE_AUDIO,
-    CODEC_ID_AAC,
-    sizeof(aacPlusAudioContext),
-    aacPlus_encode_init,
-    aacPlus_encode_frame,
-    aacPlus_encode_close,
+    .name           = "libaacplus",
+    .type           = AVMEDIA_TYPE_AUDIO,
+    .id             = CODEC_ID_AAC,
+    .priv_data_size = sizeof(aacPlusAudioContext),
+    .init           = aacPlus_encode_init,
+    .encode         = aacPlus_encode_frame,
+    .close          = aacPlus_encode_close,
     .sample_fmts = (const enum SampleFormat[]){SAMPLE_FMT_S16,SAMPLE_FMT_NONE},
     .long_name = NULL_IF_CONFIG_SMALL("libaacplus AAC+ (Advanced Audio Codec with SBR+PS)"),
 };
diff --git a/libavcodec/libopenjpegenc.c b/libavcodec/libopenjpegenc.c
index 6b37fb08cf..c088acccc9 100644
--- a/libavcodec/libopenjpegenc.c
+++ b/libavcodec/libopenjpegenc.c
@@ -365,7 +365,6 @@ AVCodec ff_libopenjpeg_encoder = {
     .init           = libopenjpeg_encode_init,
     .encode         = libopenjpeg_encode_frame,
     .close          = libopenjpeg_encode_close,
-    .decode         = NULL,
     .capabilities   = 0,
     .pix_fmts = (const enum PixelFormat[]){PIX_FMT_RGB24,PIX_FMT_RGBA,PIX_FMT_GRAY8,
                                            PIX_FMT_YUV420P,PIX_FMT_YUV422P,PIX_FMT_YUVA420P,
diff --git a/libavcodec/msvideo1enc.c b/libavcodec/msvideo1enc.c
index 09cc7a196d..401ac2a2ae 100644
--- a/libavcodec/msvideo1enc.c
+++ b/libavcodec/msvideo1enc.c
@@ -290,13 +290,13 @@ static av_cold int encode_end(AVCodecContext *avctx)
 }
 
 AVCodec ff_msvideo1_encoder = {
-    "msvideo1",
-    AVMEDIA_TYPE_VIDEO,
-    CODEC_ID_MSVIDEO1,
-    sizeof(Msvideo1EncContext),
-    encode_init,
-    encode_frame,
-    encode_end,
+    .name           = "msvideo1",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = CODEC_ID_MSVIDEO1,
+    .priv_data_size = sizeof(Msvideo1EncContext),
+    .init           = encode_init,
+    .encode         = encode_frame,
+    .close          = encode_end,
     .pix_fmts = (const enum PixelFormat[]){PIX_FMT_RGB555, PIX_FMT_NONE},
     .long_name = NULL_IF_CONFIG_SMALL("Microsoft Video-1"),
 };
diff --git a/libavcodec/pictordec.c b/libavcodec/pictordec.c
index 7c95f89bbd..b3b5f7ef4f 100644
--- a/libavcodec/pictordec.c
+++ b/libavcodec/pictordec.c
@@ -253,7 +253,7 @@ AVCodec ff_pictor_decoder = {
     .type           = AVMEDIA_TYPE_VIDEO,
     .id             = CODEC_ID_PICTOR,
     .priv_data_size = sizeof(PicContext),
-    decode_init,
+    .init           = decode_init,
     .close          = decode_end,
     .decode         = decode_frame,
     .capabilities   = CODEC_CAP_DR1,
diff --git a/libavcodec/proresenc.c b/libavcodec/proresenc.c
index 8cdcff3c49..09678a002f 100644
--- a/libavcodec/proresenc.c
+++ b/libavcodec/proresenc.c
@@ -594,6 +594,5 @@ AVCodec ff_prores_encoder = {
     .encode         = prores_encode_frame,
     .pix_fmts       = (const enum PixelFormat[]){PIX_FMT_YUV422P10, PIX_FMT_NONE},
     .long_name      = NULL_IF_CONFIG_SMALL("Apple ProRes"),
-    .capabilities   = 0,
     .profiles       = profiles
 };
diff --git a/libavcodec/sonic.c b/libavcodec/sonic.c
index e7cdb3ba81..71641f95ff 100644
--- a/libavcodec/sonic.c
+++ b/libavcodec/sonic.c
@@ -936,42 +936,39 @@ static int sonic_decode_frame(AVCodecContext *avctx,
 }
 
 AVCodec ff_sonic_decoder = {
-    "sonic",
-    AVMEDIA_TYPE_AUDIO,
-    CODEC_ID_SONIC,
-    sizeof(SonicContext),
-    sonic_decode_init,
-    NULL,
-    sonic_decode_close,
-    sonic_decode_frame,
+    .name           = "sonic",
+    .type           = AVMEDIA_TYPE_AUDIO,
+    .id             = CODEC_ID_SONIC,
+    .priv_data_size = sizeof(SonicContext),
+    .init           = sonic_decode_init,
+    .close          = sonic_decode_close,
+    .decode         = sonic_decode_frame,
     .long_name = NULL_IF_CONFIG_SMALL("Sonic"),
 };
 #endif /* CONFIG_SONIC_DECODER */
 
 #if CONFIG_SONIC_ENCODER
 AVCodec ff_sonic_encoder = {
-    "sonic",
-    AVMEDIA_TYPE_AUDIO,
-    CODEC_ID_SONIC,
-    sizeof(SonicContext),
-    sonic_encode_init,
-    sonic_encode_frame,
-    sonic_encode_close,
-    NULL,
+    .name           = "sonic",
+    .type           = AVMEDIA_TYPE_AUDIO,
+    .id             = CODEC_ID_SONIC,
+    .priv_data_size = sizeof(SonicContext),
+    .init           = sonic_encode_init,
+    .encode         = sonic_encode_frame,
+    .close          = sonic_encode_close,
     .long_name = NULL_IF_CONFIG_SMALL("Sonic"),
 };
 #endif
 
 #if CONFIG_SONIC_LS_ENCODER
 AVCodec ff_sonic_ls_encoder = {
-    "sonicls",
-    AVMEDIA_TYPE_AUDIO,
-    CODEC_ID_SONIC_LS,
-    sizeof(SonicContext),
-    sonic_encode_init,
-    sonic_encode_frame,
-    sonic_encode_close,
-    NULL,
+    .name           = "sonicls",
+    .type           = AVMEDIA_TYPE_AUDIO,
+    .id             = CODEC_ID_SONIC_LS,
+    .priv_data_size = sizeof(SonicContext),
+    .init           = sonic_encode_init,
+    .encode         = sonic_encode_frame,
+    .close          = sonic_encode_close,
     .long_name = NULL_IF_CONFIG_SMALL("Sonic lossless"),
 };
 #endif
diff --git a/libavformat/cafenc.c b/libavformat/cafenc.c
index 0dd4b349ca..699c67df7a 100644
--- a/libavformat/cafenc.c
+++ b/libavformat/cafenc.c
@@ -248,15 +248,15 @@ static int caf_write_trailer(AVFormatContext *s)
 }
 
 AVOutputFormat ff_caf_muxer = {
-    "caf",
-    NULL_IF_CONFIG_SMALL("Apple Core Audio Format"),
-    "audio/x-caf",
-    "caf",
-    sizeof(CAFContext),
-    CODEC_ID_PCM_S16BE,
-    CODEC_ID_NONE,
-    caf_write_header,
-    caf_write_packet,
-    caf_write_trailer,
+    .name           = "caf",
+    .long_name      = NULL_IF_CONFIG_SMALL("Apple Core Audio Format"),
+    .mime_type      = "audio/x-caf",
+    .extensions     = "caf",
+    .priv_data_size = sizeof(CAFContext),
+    .audio_codec    = CODEC_ID_PCM_S16BE,
+    .video_codec    = CODEC_ID_NONE,
+    .write_header   = caf_write_header,
+    .write_packet   = caf_write_packet,
+    .write_trailer  = caf_write_trailer,
     .codec_tag= (const AVCodecTag* const []){ff_codec_caf_tags, 0},
 };
diff --git a/libavformat/crcenc.c b/libavformat/crcenc.c
index d0ca8352d9..1f5854e080 100644
--- a/libavformat/crcenc.c
+++ b/libavformat/crcenc.c
@@ -57,7 +57,6 @@ static int crc_write_trailer(struct AVFormatContext *s)
 AVOutputFormat ff_crc_muxer = {
     .name              = "crc",
     .long_name         = NULL_IF_CONFIG_SMALL("CRC testing format"),
-    .extensions        = "",
     .priv_data_size    = sizeof(CRCState),
     .audio_codec       = CODEC_ID_PCM_S16LE,
     .video_codec       = CODEC_ID_RAWVIDEO,
diff --git a/libavformat/ffmenc.c b/libavformat/ffmenc.c
index 7378808567..cd4ee61326 100644
--- a/libavformat/ffmenc.c
+++ b/libavformat/ffmenc.c
@@ -244,7 +244,6 @@ static int ffm_write_trailer(AVFormatContext *s)
 AVOutputFormat ff_ffm_muxer = {
     .name              = "ffm",
     .long_name         = NULL_IF_CONFIG_SMALL("FFM (FFserver live feed) format"),
-    .mime_type         = "",
     .extensions        = "ffm",
     .priv_data_size    = sizeof(FFMContext),
     .audio_codec       = CODEC_ID_MP2,
diff --git a/libavformat/framecrcenc.c b/libavformat/framecrcenc.c
index 5798560cbe..8e66a8daf3 100644
--- a/libavformat/framecrcenc.c
+++ b/libavformat/framecrcenc.c
@@ -36,7 +36,6 @@ static int framecrc_write_packet(struct AVFormatContext *s, AVPacket *pkt)
 AVOutputFormat ff_framecrc_muxer = {
     .name              = "framecrc",
     .long_name         = NULL_IF_CONFIG_SMALL("framecrc testing format"),
-    .extensions        = "",
     .audio_codec       = CODEC_ID_PCM_S16LE,
     .video_codec       = CODEC_ID_RAWVIDEO,
     .write_packet      = framecrc_write_packet,
diff --git a/libavformat/g723_1.c b/libavformat/g723_1.c
index 86ef540edf..00cfe16266 100644
--- a/libavformat/g723_1.c
+++ b/libavformat/g723_1.c
@@ -73,12 +73,10 @@ static int g723_1_read_packet(AVFormatContext *s, AVPacket *pkt)
 }
 
 AVInputFormat ff_g723_1_demuxer = {
-    "g723_1",
-    NULL_IF_CONFIG_SMALL("G.723.1 format"),
-    0,
-    NULL,
-    g723_1_init,
-    g723_1_read_packet,
+    .name        = "g723_1",
+    .long_name   = NULL_IF_CONFIG_SMALL("G.723.1 format"),
+    .read_header = g723_1_init,
+    .read_packet = g723_1_read_packet,
     .extensions = "tco,rco",
     .flags = AVFMT_GENERIC_INDEX
 };
diff --git a/libavformat/md5enc.c b/libavformat/md5enc.c
index c18d6e4cbd..052061f039 100644
--- a/libavformat/md5enc.c
+++ b/libavformat/md5enc.c
@@ -68,7 +68,6 @@ static int write_trailer(struct AVFormatContext *s)
 AVOutputFormat ff_md5_muxer = {
     .name              = "md5",
     .long_name         = NULL_IF_CONFIG_SMALL("MD5 testing format"),
-    .extensions        = "",
     .priv_data_size    = PRIVSIZE,
     .audio_codec       = CODEC_ID_PCM_S16LE,
     .video_codec       = CODEC_ID_RAWVIDEO,
@@ -98,7 +97,6 @@ static int framemd5_write_packet(struct AVFormatContext *s, AVPacket *pkt)
 AVOutputFormat ff_framemd5_muxer = {
     .name              = "framemd5",
     .long_name         = NULL_IF_CONFIG_SMALL("Per-frame MD5 testing format"),
-    .extensions        = "",
     .priv_data_size    = PRIVSIZE,
     .audio_codec       = CODEC_ID_PCM_S16LE,
     .video_codec       = CODEC_ID_RAWVIDEO,
diff --git a/libavformat/mkvtimestamp_v2.c b/libavformat/mkvtimestamp_v2.c
index f120460057..469b75db41 100644
--- a/libavformat/mkvtimestamp_v2.c
+++ b/libavformat/mkvtimestamp_v2.c
@@ -42,13 +42,10 @@ static int write_packet(AVFormatContext *s, AVPacket *pkt)
 }
 
 AVOutputFormat ff_mkvtimestamp_v2_muxer = {
-    "mkvtimestamp_v2",
-    NULL_IF_CONFIG_SMALL("extract pts as timecode v2 format, as defined by mkvtoolnix"),
-    NULL,
-    "",
-    0,
-    CODEC_ID_NONE,
-    CODEC_ID_RAWVIDEO,
-    write_header,
-    write_packet,
+    .name         = "mkvtimestamp_v2",
+    .long_name    = NULL_IF_CONFIG_SMALL("extract pts as timecode v2 format, as defined by mkvtoolnix"),
+    .audio_codec  = CODEC_ID_NONE,
+    .video_codec  = CODEC_ID_RAWVIDEO,
+    .write_header = write_header,
+    .write_packet = write_packet,
 };
diff --git a/libavformat/vc1testenc.c b/libavformat/vc1testenc.c
index b1ed43d62e..10b7b64819 100644
--- a/libavformat/vc1testenc.c
+++ b/libavformat/vc1testenc.c
@@ -85,7 +85,6 @@ static int vc1test_write_trailer(AVFormatContext *s)
 AVOutputFormat ff_vc1t_muxer = {
     .name              = "rcv",
     .long_name         = NULL_IF_CONFIG_SMALL("VC-1 test bitstream"),
-    .mime_type         = "",
     .extensions        = "rcv",
     .priv_data_size    = sizeof(RCVContext),
     .audio_codec       = CODEC_ID_NONE,
diff --git a/libavformat/yuv4mpeg.c b/libavformat/yuv4mpeg.c
index dad29d8d55..61c72f5d82 100644
--- a/libavformat/yuv4mpeg.c
+++ b/libavformat/yuv4mpeg.c
@@ -181,7 +181,6 @@ static int yuv4_write_header(AVFormatContext *s)
 AVOutputFormat ff_yuv4mpegpipe_muxer = {
     .name              = "yuv4mpegpipe",
     .long_name         = NULL_IF_CONFIG_SMALL("YUV4MPEG pipe format"),
-    .mime_type         = "",
     .extensions        = "y4m",
     .priv_data_size    = sizeof(int),
     .audio_codec       = CODEC_ID_NONE,