*/
/**
- * @file audioconvert.c
+ * @file libavcodec/audioconvert.c
* audio conversion
* @author Michael Niedermayer <michaelni@gmx.at>
*/
+#include "libavutil/avstring.h"
#include "avcodec.h"
#include "audioconvert.h"
}
}
+static const char* const channel_names[]={
+ "FL", "FR", "FC", "LFE", "BL", "BR", "FLC", "FRC",
+ "BC", "SL", "SR", "TC", "TFL", "TFC", "TFR", "TBL",
+ "TBC", "TBR",
+ [29] = "DL",
+ [30] = "DR",
+};
+
+const char *get_channel_name(int channel_id)
+{
+ if (channel_id<0 || channel_id>=FF_ARRAY_ELEMS(channel_names))
+ return NULL;
+ return channel_names[channel_id];
+}
+
+int64_t avcodec_guess_channel_layout(int nb_channels, enum CodecID codec_id, const char *fmt_name)
+{
+ switch(nb_channels) {
+ case 1: return CH_LAYOUT_MONO;
+ case 2: return CH_LAYOUT_STEREO;
+ case 3: return CH_LAYOUT_SURROUND;
+ case 4: return CH_LAYOUT_QUAD;
+ case 5: return CH_LAYOUT_5POINT0;
+ case 6: return CH_LAYOUT_5POINT1;
+ case 8: return CH_LAYOUT_7POINT1;
+ default: return 0;
+ }
+}
+
+static const struct {
+ const char *name;
+ int nb_channels;
+ int64_t layout;
+} channel_layout_map[] = {
+ { "mono", 1, CH_LAYOUT_MONO },
+ { "stereo", 2, CH_LAYOUT_STEREO },
+ { "surround", 3, CH_LAYOUT_SURROUND },
+ { "4.0", 4, CH_LAYOUT_4POINT0 },
+ { "quad", 4, CH_LAYOUT_QUAD },
+ { "5.0", 5, CH_LAYOUT_5POINT0 },
+ { "5.0", 5, CH_LAYOUT_5POINT0_BACK },
+ { "5.1", 6, CH_LAYOUT_5POINT1 },
+ { "5.1", 6, CH_LAYOUT_5POINT1_BACK },
+ { "5.1+downmix", 8, CH_LAYOUT_5POINT1|CH_LAYOUT_STEREO_DOWNMIX, },
+ { "7.1", 8, CH_LAYOUT_7POINT1 },
+ { "7.1(wide)", 8, CH_LAYOUT_7POINT1_WIDE },
+ { "7.1+downmix", 10, CH_LAYOUT_7POINT1|CH_LAYOUT_STEREO_DOWNMIX, },
+ { 0 }
+};
+
+void avcodec_get_channel_layout_string(char *buf, int buf_size, int nb_channels, int64_t channel_layout)
+{
+ int i;
+
+ if (channel_layout==0)
+ channel_layout = avcodec_guess_channel_layout(nb_channels, CODEC_ID_NONE, NULL);
+
+ for (i=0; channel_layout_map[i].name; i++)
+ if (nb_channels == channel_layout_map[i].nb_channels &&
+ channel_layout == channel_layout_map[i].layout) {
+ av_strlcpy(buf, channel_layout_map[i].name, buf_size);
+ return;
+ }
+
+ snprintf(buf, buf_size, "%d channels", nb_channels);
+ if (channel_layout) {
+ int i,ch;
+ av_strlcat(buf, " (", buf_size);
+ for(i=0,ch=0; i<64; i++) {
+ if ((channel_layout & (1L<<i))) {
+ const char *name = get_channel_name(i);
+ if (name) {
+ if (ch>0) av_strlcat(buf, "|", buf_size);
+ av_strlcat(buf, name, buf_size);
+ }
+ ch++;
+ }
+ }
+ av_strlcat(buf, ")", buf_size);
+ }
+}
+
+int avcodec_channel_layout_num_channels(int64_t channel_layout)
+{
+ int count;
+ uint64_t x = channel_layout;
+ for (count = 0; x; count++)
+ x &= x-1; // unset lowest set bit
+ return count;
+}
+
struct AVAudioConvert {
int in_channels, out_channels;
int fmt_pair;
for(ch=0; ch<ctx->out_channels; ch++){
const int is= in_stride[ch];
const int os= out_stride[ch];
- uint8_t *pi= in[ch];
+ const uint8_t *pi= in[ch];
uint8_t *po= out[ch];
uint8_t *end= po + os*len;
if(!out[ch])
//FIXME put things below under ifdefs so we do not waste space for cases no codec will need
//FIXME rounding and clipping ?
- CONV(SAMPLE_FMT_U8 , uint8_t, SAMPLE_FMT_U8 , *(uint8_t*)pi)
- else CONV(SAMPLE_FMT_S16, int16_t, SAMPLE_FMT_U8 , (*(uint8_t*)pi - 0x80)<<8)
- else CONV(SAMPLE_FMT_S32, int32_t, SAMPLE_FMT_U8 , (*(uint8_t*)pi - 0x80)<<24)
- else CONV(SAMPLE_FMT_FLT, float , SAMPLE_FMT_U8 , (*(uint8_t*)pi - 0x80)*(1.0 / (1<<7)))
- else CONV(SAMPLE_FMT_DBL, double , SAMPLE_FMT_U8 , (*(uint8_t*)pi - 0x80)*(1.0 / (1<<7)))
- else CONV(SAMPLE_FMT_U8 , uint8_t, SAMPLE_FMT_S16, (*(int16_t*)pi>>8) + 0x80)
- else CONV(SAMPLE_FMT_S16, int16_t, SAMPLE_FMT_S16, *(int16_t*)pi)
- else CONV(SAMPLE_FMT_S32, int32_t, SAMPLE_FMT_S16, *(int16_t*)pi<<16)
- else CONV(SAMPLE_FMT_FLT, float , SAMPLE_FMT_S16, *(int16_t*)pi*(1.0 / (1<<15)))
- else CONV(SAMPLE_FMT_DBL, double , SAMPLE_FMT_S16, *(int16_t*)pi*(1.0 / (1<<15)))
- else CONV(SAMPLE_FMT_U8 , uint8_t, SAMPLE_FMT_S32, (*(int32_t*)pi>>24) + 0x80)
- else CONV(SAMPLE_FMT_S16, int16_t, SAMPLE_FMT_S32, *(int32_t*)pi>>16)
- else CONV(SAMPLE_FMT_S32, int32_t, SAMPLE_FMT_S32, *(int32_t*)pi)
- else CONV(SAMPLE_FMT_FLT, float , SAMPLE_FMT_S32, *(int32_t*)pi*(1.0 / (1<<31)))
- else CONV(SAMPLE_FMT_DBL, double , SAMPLE_FMT_S32, *(int32_t*)pi*(1.0 / (1<<31)))
- else CONV(SAMPLE_FMT_U8 , uint8_t, SAMPLE_FMT_FLT, lrintf(*(float*)pi * (1<<7)) + 0x80)
- else CONV(SAMPLE_FMT_S16, int16_t, SAMPLE_FMT_FLT, lrintf(*(float*)pi * (1<<15)))
- else CONV(SAMPLE_FMT_S32, int32_t, SAMPLE_FMT_FLT, lrintf(*(float*)pi * (1<<31)))
- else CONV(SAMPLE_FMT_FLT, float , SAMPLE_FMT_FLT, *(float*)pi)
- else CONV(SAMPLE_FMT_DBL, double , SAMPLE_FMT_FLT, *(float*)pi)
- else CONV(SAMPLE_FMT_U8 , uint8_t, SAMPLE_FMT_DBL, lrint(*(double*)pi * (1<<7)) + 0x80)
- else CONV(SAMPLE_FMT_S16, int16_t, SAMPLE_FMT_DBL, lrint(*(double*)pi * (1<<15)))
- else CONV(SAMPLE_FMT_S32, int32_t, SAMPLE_FMT_DBL, lrint(*(double*)pi * (1<<31)))
- else CONV(SAMPLE_FMT_FLT, float , SAMPLE_FMT_DBL, *(double*)pi)
- else CONV(SAMPLE_FMT_DBL, double , SAMPLE_FMT_DBL, *(double*)pi)
+ CONV(SAMPLE_FMT_U8 , uint8_t, SAMPLE_FMT_U8 , *(const uint8_t*)pi)
+ else CONV(SAMPLE_FMT_S16, int16_t, SAMPLE_FMT_U8 , (*(const uint8_t*)pi - 0x80)<<8)
+ else CONV(SAMPLE_FMT_S32, int32_t, SAMPLE_FMT_U8 , (*(const uint8_t*)pi - 0x80)<<24)
+ else CONV(SAMPLE_FMT_FLT, float , SAMPLE_FMT_U8 , (*(const uint8_t*)pi - 0x80)*(1.0 / (1<<7)))
+ else CONV(SAMPLE_FMT_DBL, double , SAMPLE_FMT_U8 , (*(const uint8_t*)pi - 0x80)*(1.0 / (1<<7)))
+ else CONV(SAMPLE_FMT_U8 , uint8_t, SAMPLE_FMT_S16, (*(const int16_t*)pi>>8) + 0x80)
+ else CONV(SAMPLE_FMT_S16, int16_t, SAMPLE_FMT_S16, *(const int16_t*)pi)
+ else CONV(SAMPLE_FMT_S32, int32_t, SAMPLE_FMT_S16, *(const int16_t*)pi<<16)
+ else CONV(SAMPLE_FMT_FLT, float , SAMPLE_FMT_S16, *(const int16_t*)pi*(1.0 / (1<<15)))
+ else CONV(SAMPLE_FMT_DBL, double , SAMPLE_FMT_S16, *(const int16_t*)pi*(1.0 / (1<<15)))
+ else CONV(SAMPLE_FMT_U8 , uint8_t, SAMPLE_FMT_S32, (*(const int32_t*)pi>>24) + 0x80)
+ else CONV(SAMPLE_FMT_S16, int16_t, SAMPLE_FMT_S32, *(const int32_t*)pi>>16)
+ else CONV(SAMPLE_FMT_S32, int32_t, SAMPLE_FMT_S32, *(const int32_t*)pi)
+ else CONV(SAMPLE_FMT_FLT, float , SAMPLE_FMT_S32, *(const int32_t*)pi*(1.0 / (1<<31)))
+ else CONV(SAMPLE_FMT_DBL, double , SAMPLE_FMT_S32, *(const int32_t*)pi*(1.0 / (1<<31)))
+ else CONV(SAMPLE_FMT_U8 , uint8_t, SAMPLE_FMT_FLT, lrintf(*(const float*)pi * (1<<7)) + 0x80)
+ else CONV(SAMPLE_FMT_S16, int16_t, SAMPLE_FMT_FLT, lrintf(*(const float*)pi * (1<<15)))
+ else CONV(SAMPLE_FMT_S32, int32_t, SAMPLE_FMT_FLT, lrintf(*(const float*)pi * (1<<31)))
+ else CONV(SAMPLE_FMT_FLT, float , SAMPLE_FMT_FLT, *(const float*)pi)
+ else CONV(SAMPLE_FMT_DBL, double , SAMPLE_FMT_FLT, *(const float*)pi)
+ else CONV(SAMPLE_FMT_U8 , uint8_t, SAMPLE_FMT_DBL, lrint(*(const double*)pi * (1<<7)) + 0x80)
+ else CONV(SAMPLE_FMT_S16, int16_t, SAMPLE_FMT_DBL, lrint(*(const double*)pi * (1<<15)))
+ else CONV(SAMPLE_FMT_S32, int32_t, SAMPLE_FMT_DBL, lrint(*(const double*)pi * (1<<31)))
+ else CONV(SAMPLE_FMT_FLT, float , SAMPLE_FMT_DBL, *(const double*)pi)
+ else CONV(SAMPLE_FMT_DBL, double , SAMPLE_FMT_DBL, *(const double*)pi)
else return -1;
}
return 0;
projects / frescor / ffmpeg.git / blobdiff