ffmpeg | branch: master | Haihao Xiang <[email protected]> | Fri Sep 17 
11:10:16 2021 +0800| [df5defe15a29dfca5f13224eb5da821095f6c745] | committer: 
Haihao Xiang

ffmpeg_opt: select a decoder after getting values for per-stream hwdec options

After applying this patch, the desired HW acceleration method is known
before selecting decoder, so we may take HW acceleration method into
account when selecting decoder for input stream in the next commit

There should be no functional changes in this patch

Signed-off-by: Haihao Xiang <[email protected]>
Signed-off-by: Anton Khirnov <[email protected]>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=df5defe15a29dfca5f13224eb5da821095f6c745
---

 fftools/ffmpeg_opt.c | 134 ++++++++++++++++++++++++++-------------------------
 1 file changed, 68 insertions(+), 66 deletions(-)

diff --git a/fftools/ffmpeg_opt.c b/fftools/ffmpeg_opt.c
index a96bcf9b8a..cf0c31bdc2 100644
--- a/fftools/ffmpeg_opt.c
+++ b/fftools/ffmpeg_opt.c
@@ -935,72 +935,7 @@ static void add_input_streams(OptionsContext *o, 
AVFormatContext *ic)
             st->codecpar->codec_tag = tag;
         }
 
-        ist->dec = choose_decoder(o, ic, st);
-        ist->decoder_opts = filter_codec_opts(o->g->codec_opts, 
ist->st->codecpar->codec_id, ic, st, ist->dec);
-
-        ist->reinit_filters = -1;
-        MATCH_PER_STREAM_OPT(reinit_filters, i, ist->reinit_filters, ic, st);
-
-        MATCH_PER_STREAM_OPT(discard, str, discard_str, ic, st);
-        ist->user_set_discard = AVDISCARD_NONE;
-
-        if ((o->video_disable && ist->st->codecpar->codec_type == 
AVMEDIA_TYPE_VIDEO) ||
-            (o->audio_disable && ist->st->codecpar->codec_type == 
AVMEDIA_TYPE_AUDIO) ||
-            (o->subtitle_disable && ist->st->codecpar->codec_type == 
AVMEDIA_TYPE_SUBTITLE) ||
-            (o->data_disable && ist->st->codecpar->codec_type == 
AVMEDIA_TYPE_DATA))
-                ist->user_set_discard = AVDISCARD_ALL;
-
-        if (discard_str && av_opt_eval_int(&cc, discard_opt, discard_str, 
&ist->user_set_discard) < 0) {
-            av_log(NULL, AV_LOG_ERROR, "Error parsing discard %s.\n",
-                    discard_str);
-            exit_program(1);
-        }
-
-        ist->filter_in_rescale_delta_last = AV_NOPTS_VALUE;
-        ist->prev_pkt_pts = AV_NOPTS_VALUE;
-
-        ist->dec_ctx = avcodec_alloc_context3(ist->dec);
-        if (!ist->dec_ctx) {
-            av_log(NULL, AV_LOG_ERROR, "Error allocating the decoder 
context.\n");
-            exit_program(1);
-        }
-
-        ret = avcodec_parameters_to_context(ist->dec_ctx, par);
-        if (ret < 0) {
-            av_log(NULL, AV_LOG_ERROR, "Error initializing the decoder 
context.\n");
-            exit_program(1);
-        }
-
-        ist->decoded_frame = av_frame_alloc();
-        if (!ist->decoded_frame)
-            exit_program(1);
-
-        ist->pkt = av_packet_alloc();
-        if (!ist->pkt)
-            exit_program(1);
-
-        if (o->bitexact)
-            ist->dec_ctx->flags |= AV_CODEC_FLAG_BITEXACT;
-
-        switch (par->codec_type) {
-        case AVMEDIA_TYPE_VIDEO:
-            if(!ist->dec)
-                ist->dec = avcodec_find_decoder(par->codec_id);
-
-            // avformat_find_stream_info() doesn't set this for us anymore.
-            ist->dec_ctx->framerate = st->avg_frame_rate;
-
-            MATCH_PER_STREAM_OPT(frame_rates, str, framerate, ic, st);
-            if (framerate && av_parse_video_rate(&ist->framerate,
-                                                 framerate) < 0) {
-                av_log(NULL, AV_LOG_ERROR, "Error parsing framerate %s.\n",
-                       framerate);
-                exit_program(1);
-            }
-
-            ist->top_field_first = -1;
-            MATCH_PER_STREAM_OPT(top_field_first, i, ist->top_field_first, ic, 
st);
-
+        if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
             MATCH_PER_STREAM_OPT(hwaccels, str, hwaccel, ic, st);
             MATCH_PER_STREAM_OPT(hwaccel_output_formats, str,
                                  hwaccel_output_format, ic, st);
@@ -1066,6 +1001,73 @@ static void add_input_streams(OptionsContext *o, 
AVFormatContext *ic)
             }
 
             ist->hwaccel_pix_fmt = AV_PIX_FMT_NONE;
+        }
+
+        ist->dec = choose_decoder(o, ic, st);
+        ist->decoder_opts = filter_codec_opts(o->g->codec_opts, 
ist->st->codecpar->codec_id, ic, st, ist->dec);
+
+        ist->reinit_filters = -1;
+        MATCH_PER_STREAM_OPT(reinit_filters, i, ist->reinit_filters, ic, st);
+
+        MATCH_PER_STREAM_OPT(discard, str, discard_str, ic, st);
+        ist->user_set_discard = AVDISCARD_NONE;
+
+        if ((o->video_disable && ist->st->codecpar->codec_type == 
AVMEDIA_TYPE_VIDEO) ||
+            (o->audio_disable && ist->st->codecpar->codec_type == 
AVMEDIA_TYPE_AUDIO) ||
+            (o->subtitle_disable && ist->st->codecpar->codec_type == 
AVMEDIA_TYPE_SUBTITLE) ||
+            (o->data_disable && ist->st->codecpar->codec_type == 
AVMEDIA_TYPE_DATA))
+                ist->user_set_discard = AVDISCARD_ALL;
+
+        if (discard_str && av_opt_eval_int(&cc, discard_opt, discard_str, 
&ist->user_set_discard) < 0) {
+            av_log(NULL, AV_LOG_ERROR, "Error parsing discard %s.\n",
+                    discard_str);
+            exit_program(1);
+        }
+
+        ist->filter_in_rescale_delta_last = AV_NOPTS_VALUE;
+        ist->prev_pkt_pts = AV_NOPTS_VALUE;
+
+        ist->dec_ctx = avcodec_alloc_context3(ist->dec);
+        if (!ist->dec_ctx) {
+            av_log(NULL, AV_LOG_ERROR, "Error allocating the decoder 
context.\n");
+            exit_program(1);
+        }
+
+        ret = avcodec_parameters_to_context(ist->dec_ctx, par);
+        if (ret < 0) {
+            av_log(NULL, AV_LOG_ERROR, "Error initializing the decoder 
context.\n");
+            exit_program(1);
+        }
+
+        ist->decoded_frame = av_frame_alloc();
+        if (!ist->decoded_frame)
+            exit_program(1);
+
+        ist->pkt = av_packet_alloc();
+        if (!ist->pkt)
+            exit_program(1);
+
+        if (o->bitexact)
+            ist->dec_ctx->flags |= AV_CODEC_FLAG_BITEXACT;
+
+        switch (par->codec_type) {
+        case AVMEDIA_TYPE_VIDEO:
+            if(!ist->dec)
+                ist->dec = avcodec_find_decoder(par->codec_id);
+
+            // avformat_find_stream_info() doesn't set this for us anymore.
+            ist->dec_ctx->framerate = st->avg_frame_rate;
+
+            MATCH_PER_STREAM_OPT(frame_rates, str, framerate, ic, st);
+            if (framerate && av_parse_video_rate(&ist->framerate,
+                                                 framerate) < 0) {
+                av_log(NULL, AV_LOG_ERROR, "Error parsing framerate %s.\n",
+                       framerate);
+                exit_program(1);
+            }
+
+            ist->top_field_first = -1;
+            MATCH_PER_STREAM_OPT(top_field_first, i, ist->top_field_first, ic, 
st);
 
             break;
         case AVMEDIA_TYPE_AUDIO:

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