[libav-devel] [PATCH 5/6] libopencore-amr, libvo-amrwbenc: Find the closest matching bitrate

2011-04-13 Thread Martin Storsjö
Dynamically print the supported bitrates from the local table,
instead of using a hardcoded log message.
---
 libavcodec/libopencore-amr.c |   36 
 libavcodec/libvo-amrwbenc.c  |   37 -
 2 files changed, 40 insertions(+), 33 deletions(-)

diff --git a/libavcodec/libopencore-amr.c b/libavcodec/libopencore-amr.c
index 4d26fc6..e6216c9 100644
--- a/libavcodec/libopencore-amr.c
+++ b/libavcodec/libopencore-amr.c
@@ -20,6 +20,7 @@
  */
 
 #include "avcodec.h"
+#include "libavutil/avstring.h"
 
 static void amr_decode_fix_avctx(AVCodecContext *avctx)
 {
@@ -40,9 +41,6 @@ static void amr_decode_fix_avctx(AVCodecContext *avctx)
 #include 
 #include 
 
-static const char nb_bitrate_unsupported[] =
-"bitrate not supported: use one of 4.75k, 5.15k, 5.9k, 6.7k, 7.4k, 7.95k, 
10.2k or 12.2k\n";
-
 /* Common code for fixed and float version*/
 typedef struct AMR_bitrates {
 int   rate;
@@ -50,20 +48,32 @@ typedef struct AMR_bitrates {
 } AMR_bitrates;
 
 /* Match desired bitrate */
-static int get_bitrate_mode(int bitrate)
+static int get_bitrate_mode(int bitrate, void *log_ctx)
 {
 /* make the correspondance between bitrate and mode */
 static const AMR_bitrates rates[] = {
 { 4750, MR475 }, { 5150, MR515 }, {  5900, MR59  }, {  6700, MR67  },
 { 7400, MR74 },  { 7950, MR795 }, { 10200, MR102 }, { 12200, MR122 }
 };
-int i;
+int i, best = -1, min_diff = 0;
+char log_buf[200];
 
-for (i = 0; i < 8; i++)
+for (i = 0; i < 8; i++) {
 if (rates[i].rate == bitrate)
 return rates[i].mode;
-/* no bitrate matching, return an error */
-return -1;
+if (best < 0 || abs(rates[i].rate - bitrate) < min_diff) {
+best = i;
+min_diff = abs(rates[i].rate - bitrate);
+}
+}
+/* no bitrate matching exactly, log a warning */
+snprintf(log_buf, sizeof(log_buf), "bitrate not supported: use one of ");
+for (i = 0; i < 8; i++)
+av_strlcatf(log_buf, sizeof(log_buf), "%.2fk, ", rates[i].rate/ 
1000.f);
+av_strlcatf(log_buf, sizeof(log_buf), "using %.2fk", rates[best].rate / 
1000.f);
+av_log(log_ctx, AV_LOG_WARNING, "%s\n", log_buf);
+
+return best;
 }
 
 typedef struct AMRContext {
@@ -171,10 +181,7 @@ static av_cold int amr_nb_encode_init(AVCodecContext 
*avctx)
 return -1;
 }
 
-if ((s->enc_bitrate = get_bitrate_mode(avctx->bit_rate)) < 0) {
-av_log(avctx, AV_LOG_ERROR, nb_bitrate_unsupported);
-return AVERROR(ENOSYS);
-}
+s->enc_bitrate = get_bitrate_mode(avctx->bit_rate, avctx);
 
 return 0;
 }
@@ -195,10 +202,7 @@ static int amr_nb_encode_frame(AVCodecContext *avctx,
 AMRContext *s = avctx->priv_data;
 int written;
 
-if ((s->enc_bitrate = get_bitrate_mode(avctx->bit_rate)) < 0) {
-av_log(avctx, AV_LOG_ERROR, nb_bitrate_unsupported);
-return AVERROR(ENOSYS);
-}
+s->enc_bitrate = get_bitrate_mode(avctx->bit_rate, avctx);
 
 written = Encoder_Interface_Encode(s->enc_state, s->enc_bitrate, data,
frame, 0);
diff --git a/libavcodec/libvo-amrwbenc.c b/libavcodec/libvo-amrwbenc.c
index e55fdc6..74caa49 100644
--- a/libavcodec/libvo-amrwbenc.c
+++ b/libavcodec/libvo-amrwbenc.c
@@ -22,10 +22,7 @@
 #include 
 
 #include "avcodec.h"
-
-static const char wb_bitrate_unsupported[] =
-"bitrate not supported: use one of 6.6k, 8.85k, 12.65k, 14.25k, 15.85k, "
-"18.25k, 19.85k, 23.05k, or 23.85k\n";
+#include "libavutil/avstring.h"
 
 typedef struct AMRWBContext {
 void  *state;
@@ -33,18 +30,30 @@ typedef struct AMRWBContext {
 intallow_dtx;
 } AMRWBContext;
 
-static int get_wb_bitrate_mode(int bitrate)
+static int get_wb_bitrate_mode(int bitrate, void *log_ctx)
 {
 /* make the correspondance between bitrate and mode */
 static const int rates[] = {  6600,  8850, 12650, 14250, 15850, 18250,
  19850, 23050, 23850 };
-int i;
+int i, best = -1, min_diff = 0;
+char log_buf[200];
 
-for (i = 0; i < 9; i++)
+for (i = 0; i < 9; i++) {
 if (rates[i] == bitrate)
 return i;
-/* no bitrate matching, return an error */
-return -1;
+if (best < 0 || abs(rates[i] - bitrate) < min_diff) {
+best = i;
+min_diff = abs(rates[i] - bitrate);
+}
+}
+/* no bitrate matching exactly, log a warning */
+snprintf(log_buf, sizeof(log_buf), "bitrate not supported: use one of ");
+for (i = 0; i < 9; i++)
+av_strlcatf(log_buf, sizeof(log_buf), "%.2fk, ", rates[i]/ 1000.f);
+av_strlcatf(log_buf, sizeof(log_buf), "using %.2fk", rates[best] / 1000.f);
+av_log(log_ctx, AV_LOG_WARNING, "%s\n", log_buf);
+
+return best;
 }
 
 static av_cold int amr_wb_encode_init(AVCodecContext *avctx)
@@ -61,10 +70,7 @@ static av_cold int amr_wb_encode_init(AVCo

Re: [libav-devel] [PATCH 5/6] libopencore-amr, libvo-amrwbenc: Find the closest matching bitrate

2011-04-13 Thread Martin Storsjö
On Wed, 13 Apr 2011, Martin Storsjö wrote:

> Dynamically print the supported bitrates from the local table,
> instead of using a hardcoded log message.
> ---
>  libavcodec/libopencore-amr.c |   36 
>  libavcodec/libvo-amrwbenc.c  |   37 -
>  2 files changed, 40 insertions(+), 33 deletions(-)

23:55  BBB-work: do http://patches.libav.org/patch/2241/ and 
http://patches.libav.org/patch/2242/ look ok to you?
00:00  wbs: yeah look ok on a quick look

Thus, queued.

// Martin___
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