lavu/opt: change the way default pixel and sample format value is set

Use the i64 field rather than the string value. Using a string to set a
default sample/pixel format is weird, also the new interface is more
consistent with the rest of the API.

This is technically an API break, but hopefully there are no applications
using this feature outside of FFmpeg. In order to save backward
compatibility with mixed libraries in case libavutil is updated but not
the other libraries, some ifdeffery hacks are added.

Note that the version check is only performed when class->version != 0,
since if it is not defined then we assume that no version was defined and
the class is not affected by the change.

We will luckily get rid of the hack at the next major bump.

libavcodec/options_table.h

@@ -401,7 +401,7 @@ static const AVOption options[]={
 {"em", "Emergency",          0, AV_OPT_TYPE_CONST, {.i64 = AV_AUDIO_SERVICE_TYPE_EMERGENCY },         INT_MIN, INT_MAX, A|E, "audio_service_type"},
 {"vo", "Voice Over",         0, AV_OPT_TYPE_CONST, {.i64 = AV_AUDIO_SERVICE_TYPE_VOICE_OVER },        INT_MIN, INT_MAX, A|E, "audio_service_type"},
 {"ka", "Karaoke",            0, AV_OPT_TYPE_CONST, {.i64 = AV_AUDIO_SERVICE_TYPE_KARAOKE },           INT_MIN, INT_MAX, A|E, "audio_service_type"},
-{"request_sample_fmt", "sample format audio decoders should prefer", OFFSET(request_sample_fmt), AV_OPT_TYPE_SAMPLE_FMT, {.str = NULL }, 0, 0, A|D, "request_sample_fmt"},
+{"request_sample_fmt", "sample format audio decoders should prefer", OFFSET(request_sample_fmt), AV_OPT_TYPE_SAMPLE_FMT, {.i64=AV_SAMPLE_FMT_NONE}, 0, 0, A|D, "request_sample_fmt"},
 {"pkt_timebase", NULL, OFFSET(pkt_timebase), AV_OPT_TYPE_RATIONAL, {.dbl = 0 }, 0, INT_MAX, 0},
 {NULL},
 };

libavcodec/version.h

@@ -30,7 +30,7 @@
 
 #define LIBAVCODEC_VERSION_MAJOR 54
 #define LIBAVCODEC_VERSION_MINOR 77
-#define LIBAVCODEC_VERSION_MICRO 100
+#define LIBAVCODEC_VERSION_MICRO 101
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \

libavdevice/dshow.c

@@ -1018,7 +1018,7 @@ static int dshow_read_packet(AVFormatContext *s, AVPacket *pkt)
 #define DEC AV_OPT_FLAG_DECODING_PARAM
 static const AVOption options[] = {
     { "video_size", "set video size given a string such as 640x480 or hd720.", OFFSET(requested_width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC },
-    { "pixel_format", "set video pixel format", OFFSET(pixel_format), AV_OPT_TYPE_PIXEL_FMT, {.str = NULL}, 0, 0, DEC },
+    { "pixel_format", "set video pixel format", OFFSET(pixel_format), AV_OPT_TYPE_PIXEL_FMT, {.i64 = AV_PIX_FMT_NONE}, 0, 0, DEC },
     { "framerate", "set video frame rate", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
     { "sample_rate", "set audio sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC },
     { "sample_size", "set audio sample size", OFFSET(sample_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 16, DEC },

libavdevice/version.h

@@ -29,7 +29,7 @@
 
 #define LIBAVDEVICE_VERSION_MAJOR  54
 #define LIBAVDEVICE_VERSION_MINOR   3
-#define LIBAVDEVICE_VERSION_MICRO 100
+#define LIBAVDEVICE_VERSION_MICRO 101
 
 #define LIBAVDEVICE_VERSION_INT AV_VERSION_INT(LIBAVDEVICE_VERSION_MAJOR, \
                                                LIBAVDEVICE_VERSION_MINOR, \

libavutil/opt.c

@@ -813,6 +813,7 @@ void av_opt_set_defaults(void *s)
 void av_opt_set_defaults2(void *s, int mask, int flags)
 {
 #endif
+    const AVClass *class = *(AVClass **)s;
     const AVOption *opt = NULL;
     while ((opt = av_opt_next(s, opt)) != NULL) {
 #if FF_API_OLD_AVOPTIONS
@@ -843,9 +844,23 @@ void av_opt_set_defaults2(void *s, int mask, int flags)
             break;
             case AV_OPT_TYPE_STRING:
             case AV_OPT_TYPE_IMAGE_SIZE:
+                av_opt_set(s, opt->name, opt->default_val.str, 0);
+                break;
             case AV_OPT_TYPE_PIXEL_FMT:
+#if LIBAVUTIL_VERSION_MAJOR < 53
+                if (class->version && class->version < AV_VERSION_INT(52, 10, 100))
+                    av_opt_set(s, opt->name, opt->default_val.str, 0);
+                else
+#endif
+                    av_opt_set_pixel_fmt(s, opt->name, opt->default_val.i64, 0);
+                break;
             case AV_OPT_TYPE_SAMPLE_FMT:
-                av_opt_set(s, opt->name, opt->default_val.str, 0);
+#if LIBAVUTIL_VERSION_MAJOR < 53
+                if (class->version && class->version < AV_VERSION_INT(52, 10, 100))
+                    av_opt_set(s, opt->name, opt->default_val.str, 0);
+                else
+#endif
+                    av_opt_set_sample_fmt(s, opt->name, opt->default_val.i64, 0);
                 break;
             case AV_OPT_TYPE_BINARY:
                 /* Cannot set default for binary */
@@ -1164,8 +1179,8 @@ static const AVOption test_options[]= {
 {"lame",     "set lame flag ", 0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_LAME}, INT_MIN,  INT_MAX, 0, "flags" },
 {"mu",       "set mu flag ",   0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_MU},   INT_MIN,  INT_MAX, 0, "flags" },
 {"size",     "set size",       OFFSET(w),        AV_OPT_TYPE_IMAGE_SIZE,{0},             0,        0                   },
-{"pix_fmt",  "set pixfmt",     OFFSET(pix_fmt),  AV_OPT_TYPE_PIXEL_FMT,{0},              0,        0                   },
-{"sample_fmt", "set samplefmt", OFFSET(sample_fmt), AV_OPT_TYPE_SAMPLE_FMT,{0},          0,        0                   },
+{"pix_fmt",  "set pixfmt",     OFFSET(pix_fmt),  AV_OPT_TYPE_PIXEL_FMT, {.i64 = AV_PIX_FMT_NONE}},
+{"sample_fmt", "set samplefmt", OFFSET(sample_fmt), AV_OPT_TYPE_SAMPLE_FMT, {.i64 = AV_SAMPLE_FMT_NONE}},
 {NULL},
 };
 

libavutil/version.h

@@ -75,8 +75,8 @@
  */
 
 #define LIBAVUTIL_VERSION_MAJOR  52
-#define LIBAVUTIL_VERSION_MINOR   9
-#define LIBAVUTIL_VERSION_MICRO 102
+#define LIBAVUTIL_VERSION_MINOR  10
+#define LIBAVUTIL_VERSION_MICRO 100
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
                                                LIBAVUTIL_VERSION_MINOR, \