avcodec/mjpegenc: Include all supported pix_fmts in mpegenc pix_fmts

Currently said list contains only the pixel formats that are always
supported irrespective of the range and the value of
strict_std_compliance. This makes the MJPEG encoder an outlier as all
other codecs put all potentially supported pixel formats into said list
and error out if the chosen pixel format is unsupported. This commit
brings it therefore in line with the other encoders.

The behaviour of fftools/ffmpeg_filter.c has been preserved. A more
informed decision would be possible if colour range were available
at this point, but it isn't.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

fftools/ffmpeg_filter.c

@@ -39,22 +39,16 @@
 #include "libavutil/imgutils.h"
 #include "libavutil/samplefmt.h"
 
-static const enum AVPixelFormat *get_compliance_unofficial_pix_fmts(enum AVCodecID codec_id, const enum AVPixelFormat default_formats[])
+// FIXME: YUV420P etc. are actually supported with full color range,
+// yet the latter information isn't available here.
+static const enum AVPixelFormat *get_compliance_normal_pix_fmts(enum AVCodecID codec_id, const enum AVPixelFormat default_formats[])
 {
     static const enum AVPixelFormat mjpeg_formats[] =
         { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P,
-          AV_PIX_FMT_YUV420P,  AV_PIX_FMT_YUV422P,  AV_PIX_FMT_YUV444P,
           AV_PIX_FMT_NONE };
-    static const enum AVPixelFormat ljpeg_formats[] =
-        { AV_PIX_FMT_BGR24   , AV_PIX_FMT_BGRA    , AV_PIX_FMT_BGR0,
-          AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
-          AV_PIX_FMT_YUV420P , AV_PIX_FMT_YUV444P , AV_PIX_FMT_YUV422P,
-          AV_PIX_FMT_NONE};
 
     if (codec_id == AV_CODEC_ID_MJPEG) {
         return mjpeg_formats;
-    } else if (codec_id == AV_CODEC_ID_LJPEG) {
-        return ljpeg_formats;
     } else {
         return default_formats;
     }
@@ -70,8 +64,8 @@ static enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *enc_ctx
         int has_alpha = desc ? desc->nb_components % 2 == 0 : 0;
         enum AVPixelFormat best= AV_PIX_FMT_NONE;
 
-        if (enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
-            p = get_compliance_unofficial_pix_fmts(enc_ctx->codec_id, p);
+        if (enc_ctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
+            p = get_compliance_normal_pix_fmts(enc_ctx->codec_id, p);
         }
         for (; *p != AV_PIX_FMT_NONE; p++) {
             best = av_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL);
@@ -118,8 +112,8 @@ static char *choose_pix_fmts(OutputFilter *ofilter)
             exit_program(1);
 
         p = ost->enc->pix_fmts;
-        if (ost->enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
-            p = get_compliance_unofficial_pix_fmts(ost->enc_ctx->codec_id, p);
+        if (ost->enc_ctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
+            p = get_compliance_normal_pix_fmts(ost->enc_ctx->codec_id, p);
         }
 
         for (; *p != AV_PIX_FMT_NONE; p++) {

libavcodec/encode.c

@@ -564,9 +564,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
         for (i = 0; avctx->codec->pix_fmts[i] != AV_PIX_FMT_NONE; i++)
             if (avctx->pix_fmt == avctx->codec->pix_fmts[i])
                 break;
-        if (avctx->codec->pix_fmts[i] == AV_PIX_FMT_NONE
-            && !(avctx->codec_id == AV_CODEC_ID_MJPEG
-                 && avctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL)) {
+        if (avctx->codec->pix_fmts[i] == AV_PIX_FMT_NONE) {
             char buf[128];
             snprintf(buf, sizeof(buf), "%d", avctx->pix_fmt);
             av_log(avctx, AV_LOG_ERROR, "Specified pixel format %s is invalid or not supported\n",

libavcodec/ljpegenc.c

@@ -289,19 +289,11 @@ static av_cold int ljpeg_encode_close(AVCodecContext *avctx)
 
 static av_cold int ljpeg_encode_init(AVCodecContext *avctx)
 {
+    int ret = ff_mjpeg_encode_check_pix_fmt(avctx);
     LJpegEncContext *s = avctx->priv_data;
 
-    if ((avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
-         avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
-         avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
-         avctx->color_range == AVCOL_RANGE_MPEG) &&
-        avctx->color_range != AVCOL_RANGE_JPEG   &&
-        avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
-        av_log(avctx, AV_LOG_ERROR,
-               "Non full-range YUV is non-standard, set strict_std_compliance "
-               "to at most unofficial to use it.\n");
-        return AVERROR(EINVAL);
-    }
+    if (ret < 0)
+        return ret;
 
 #if FF_API_CODED_FRAME
 FF_DISABLE_DEPRECATION_WARNINGS

libavcodec/mjpegenc.c

@@ -261,9 +261,16 @@ static int alloc_huffman(MpegEncContext *s)
 av_cold int ff_mjpeg_encode_init(MpegEncContext *s)
 {
     MJpegContext *m;
+    int ret;
 
     av_assert0(s->slice_context_count == 1);
 
+    /* The following check is automatically true for AMV,
+     * but it doesn't hurt either. */
+    ret = ff_mjpeg_encode_check_pix_fmt(s->avctx);
+    if (ret < 0)
+        return ret;
+
     if (s->width > 65500 || s->height > 65500) {
         av_log(s, AV_LOG_ERROR, "JPEG does not support resolutions above 65500x65500\n");
         return AVERROR(EINVAL);
@@ -609,7 +616,9 @@ AVCodec ff_mjpeg_encoder = {
     .capabilities   = AV_CODEC_CAP_SLICE_THREADS | AV_CODEC_CAP_FRAME_THREADS,
     .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
     .pix_fmts       = (const enum AVPixelFormat[]) {
-        AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_NONE
+        AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P,
+        AV_PIX_FMT_YUV420P,  AV_PIX_FMT_YUV422P,  AV_PIX_FMT_YUV444P,
+        AV_PIX_FMT_NONE
     },
     .priv_class     = &mjpeg_class,
     .profiles       = NULL_IF_CONFIG_SMALL(ff_mjpeg_profiles),

libavcodec/mjpegenc_common.c

@@ -436,3 +436,19 @@ void ff_mjpeg_encode_dc(PutBitContext *pb, int val,
         put_sbits(pb, nbits, mant);
     }
 }
+
+int ff_mjpeg_encode_check_pix_fmt(AVCodecContext *avctx)
+{
+    if (avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
+        avctx->color_range != AVCOL_RANGE_JPEG &&
+        (avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
+         avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
+         avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
+         avctx->color_range == AVCOL_RANGE_MPEG)) {
+        av_log(avctx, AV_LOG_ERROR,
+               "Non full-range YUV is non-standard, set strict_std_compliance "
+               "to at most unofficial to use it.\n");
+        return AVERROR(EINVAL);
+    }
+    return 0;
+}

libavcodec/mjpegenc_common.h

@@ -41,4 +41,6 @@ void ff_mjpeg_init_hvsample(AVCodecContext *avctx, int hsample[4], int vsample[4
 void ff_mjpeg_encode_dc(PutBitContext *pb, int val,
                         uint8_t *huff_size, uint16_t *huff_code);
 
+int ff_mjpeg_encode_check_pix_fmt(AVCodecContext *avctx);
+
 #endif /* AVCODEC_MJPEGENC_COMMON_H */

libavcodec/mpegvideo_enc.c

@@ -297,36 +297,10 @@ av_cold int ff_mpv_encode_init(AVCodecContext *avctx)
 {
     MpegEncContext *s = avctx->priv_data;
     AVCPBProperties *cpb_props;
-    int i, ret, format_supported;
+    int i, ret;
 
     mpv_encode_defaults(s);
 
-    switch (avctx->codec_id) {
-    case AV_CODEC_ID_MJPEG:
-        format_supported = 0;
-        /* JPEG color space */
-        if (avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
-            avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
-            avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
-            (avctx->color_range == AVCOL_RANGE_JPEG &&
-             (avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
-              avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
-              avctx->pix_fmt == AV_PIX_FMT_YUV444P)))
-            format_supported = 1;
-        /* MPEG color space */
-        else if (avctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL &&
-                 (avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
-                  avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
-                  avctx->pix_fmt == AV_PIX_FMT_YUV444P))
-            format_supported = 1;
-
-        if (!format_supported) {
-            av_log(avctx, AV_LOG_ERROR, "colorspace not supported in jpeg\n");
-            return AVERROR(EINVAL);
-        }
-        break;
-    }
-
     switch (avctx->pix_fmt) {
     case AV_PIX_FMT_YUVJ444P:
     case AV_PIX_FMT_YUV444P: