[FFmpeg-devel] [PATCH] libtheoraenc: Add encoding speed level option

[bernat.arlandis@gmail.com]

From: Bernat Arlandis <berarma@hotmail.com>

---
 libavcodec/libtheoraenc.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/libavcodec/libtheoraenc.c b/libavcodec/libtheoraenc.c
index eb94458639..de2b913634 100644
--- a/libavcodec/libtheoraenc.c
+++ b/libavcodec/libtheoraenc.c
@@ -37,6 +37,7 @@
 #include "libavutil/pixdesc.h"
 #include "libavutil/log.h"
 #include "libavutil/base64.h"
+#include "libavutil/opt.h"
 #include "avcodec.h"
 #include "codec_internal.h"
 #include "encode.h"
@@ -45,6 +46,7 @@
 #include <theora/theoraenc.h>
 
 typedef struct TheoraContext {
+    AVClass    *av_class;                  /**< class for AVOptions            */
     th_enc_ctx *t_state;
     uint8_t    *stats;
     int         stats_size;
@@ -52,8 +54,21 @@ typedef struct TheoraContext {
     int         uv_hshift;
     int         uv_vshift;
     int         keyframe_mask;
+    int         speed_level;
 } TheoraContext;
 
+static const AVOption options[] = {
+    { "speed_level", "Sets the encoding speed level", offsetof(TheoraContext, speed_level), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
+    { NULL }
+};
+
+static const AVClass theora_class = {
+    .class_name = "libtheora",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
 /** Concatenate an ogg_packet into the extradata. */
 static int concatenate_packet(unsigned int* offset,
                               AVCodecContext* avc_context,
@@ -244,6 +259,17 @@ static av_cold int encode_init(AVCodecContext* avc_context)
         return AVERROR_EXTERNAL;
     }
 
+    // Set encoding speed level
+    if (h->speed_level != -1) {
+        int max_speed_level;
+        int speed_level = h->speed_level;
+        th_encode_ctl(h->t_state, TH_ENCCTL_GET_SPLEVEL_MAX, &max_speed_level, sizeof(max_speed_level));
+        if (speed_level > max_speed_level) {
+            speed_level = max_speed_level;
+        }
+        th_encode_ctl(h->t_state, TH_ENCCTL_SET_SPLEVEL, &speed_level, sizeof(speed_level));
+    }
+
     // need to enable 2 pass (via TH_ENCCTL_2PASS_) before encoding headers
     if (avc_context->flags & AV_CODEC_FLAG_PASS1) {
         if ((ret = get_stats(avc_context, 0)) < 0)
@@ -389,6 +415,7 @@ const FFCodec ff_libtheora_encoder = {
     .close          = encode_close,
     FF_CODEC_ENCODE_CB(encode_frame),
     CODEC_PIXFMTS(AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P),
+    .p.priv_class   = &theora_class,
     .color_ranges   = AVCOL_RANGE_MPEG,
     .p.wrapper_name = "libtheora",
 };

base-commit: bedfb6eca402037f5cbb115fa767d106b8c14f1c
-- 
2.39.5

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