double psnr_totals[NUM_ENCODERS][4] = {{0,0}};
int psnr_count[NUM_ENCODERS] = {0};
- /* Set the required target bitrates for each resolution level. */
+ /* Set the required target bitrates for each resolution level.
+ * If target bitrate for highest-resolution level is set to 0,
+ * (i.e. target_bitrate[0]=0), we skip encoding at that level.
+ */
unsigned int target_bitrate[NUM_ENCODERS]={1400, 500, 100};
/* Enter the frame rate of the input video */
int framerate = 30;
dsf[1] controls down sampling from level 1 to level 2;
dsf[2] is not used. */
vpx_rational_t dsf[NUM_ENCODERS] = {{2, 1}, {2, 1}, {1, 1}};
+ /* Encode starting from which resolution level. Normally it is 0 that
+ * means the original(highest) resolution. */
+ int s_lvl = 0;
if(argc!= (5+NUM_ENCODERS))
die("Usage: %s <width> <height> <infile> <outfile(s)> <output psnr?>\n",
if(width < 16 || width%2 || height <16 || height%2)
die("Invalid resolution: %ldx%ld", width, height);
+ /* Check to see if we need to encode all resolution levels */
+ for (i=0; i<NUM_ENCODERS; i++)
+ {
+ if (target_bitrate[i])
+ break;
+ else
+ s_lvl += 1;
+ }
+
+ if (s_lvl >= NUM_ENCODERS)
+ {
+ printf("No encoding: total number of encoders is 0!");
+ return 0;
+ }
+
/* Open input video file for encoding */
if(!(infile = fopen(argv[3], "rb")))
die("Failed to open %s for reading", argv[3]);
else
read_frame_p = read_frame_by_row;
- for (i=0; i< NUM_ENCODERS; i++)
- write_ivf_file_header(outfile[i], &cfg[i], 0);
-
/* Initialize multi-encoder */
- if(vpx_codec_enc_init_multi(&codec[0], interface, &cfg[0], NUM_ENCODERS,
- (show_psnr ? VPX_CODEC_USE_PSNR : 0), &dsf[0]))
- die_codec(&codec[0], "Failed to initialize encoder");
+ if(vpx_codec_enc_init_multi(&codec[s_lvl], interface, &cfg[s_lvl], s_lvl,
+ NUM_ENCODERS,
+ (show_psnr ? VPX_CODEC_USE_PSNR : 0), &dsf[s_lvl]))
+ die_codec(&codec[s_lvl], "Failed to initialize encoder");
/* The extra encoding configuration parameters can be set as follows. */
/* Set encoding speed */
- for ( i=0; i<NUM_ENCODERS; i++)
+ for ( i=s_lvl; i<NUM_ENCODERS; i++)
{
int speed = -6;
if(vpx_codec_control(&codec[i], VP8E_SET_CPUUSED, speed))
* better performance. */
{
unsigned int static_thresh = 1000;
- if(vpx_codec_control(&codec[0], VP8E_SET_STATIC_THRESHOLD, static_thresh))
- die_codec(&codec[0], "Failed to set static threshold");
+ if(vpx_codec_control(&codec[s_lvl], VP8E_SET_STATIC_THRESHOLD,
+ static_thresh))
+ die_codec(&codec[s_lvl], "Failed to set static threshold");
}
/* Set static thresh = 0 for other encoders for better quality */
- for ( i=1; i<NUM_ENCODERS; i++)
+ for ( i=s_lvl+1; i<NUM_ENCODERS; i++)
{
unsigned int static_thresh = 0;
- if(vpx_codec_control(&codec[i], VP8E_SET_STATIC_THRESHOLD, static_thresh))
+ if(vpx_codec_control(&codec[i], VP8E_SET_STATIC_THRESHOLD,
+ static_thresh))
die_codec(&codec[i], "Failed to set static threshold");
}
frame_avail = 1;
got_data = 0;
+ for (i=s_lvl ; i< NUM_ENCODERS; i++)
+ write_ivf_file_header(outfile[i], &cfg[i], 0);
+
while(frame_avail || got_data)
{
vpx_codec_iter_t iter[NUM_ENCODERS]={NULL};
}
/* Encode each frame at multi-levels */
- if(vpx_codec_encode(&codec[0], frame_avail? &raw[0] : NULL,
+ if(vpx_codec_encode(&codec[s_lvl], frame_avail? &raw[s_lvl] : NULL,
frame_cnt, 1, flags, arg_deadline))
- die_codec(&codec[0], "Failed to encode frame");
+ die_codec(&codec[s_lvl], "Failed to encode frame");
- for (i=NUM_ENCODERS-1; i>=0 ; i--)
+ for (i=NUM_ENCODERS-1; i>=s_lvl ; i--)
{
got_data = 0;
fclose(infile);
- for (i=0; i< NUM_ENCODERS; i++)
+ for (i=s_lvl; i< NUM_ENCODERS; i++)
{
printf("Processed %ld frames.\n",(long int)frame_cnt-1);
/* Try to rewrite the file header with the actual frame count */
if(!fseek(outfile[i], 0, SEEK_SET))
write_ivf_file_header(outfile[i], &cfg[i], frame_cnt-1);
- fclose(outfile[i]);
+ }
+ for (i=0; i< NUM_ENCODERS; i++)
+ {
+ fclose(outfile[i]);
vpx_img_free(&raw[i]);
}
* \param[in] ctx Pointer to this instance's context.
* \param[in] iface Pointer to the algorithm interface to use.
* \param[in] cfg Configuration to use, if known. May be NULL.
+ * \param[in] s_lvl Starting encoder id. Normally it is 0.
* \param[in] num_enc Total number of encoders.
* \param[in] flags Bitfield of VPX_CODEC_USE_* flags
* \param[in] dsf Pointer to down-sampling factors.
vpx_codec_err_t vpx_codec_enc_init_multi_ver(vpx_codec_ctx_t *ctx,
vpx_codec_iface_t *iface,
vpx_codec_enc_cfg_t *cfg,
+ int s_lvl,
int num_enc,
vpx_codec_flags_t flags,
vpx_rational_t *dsf,
*
* Ensures the ABI version parameter is properly set.
*/
-#define vpx_codec_enc_init_multi(ctx, iface, cfg, num_enc, flags, dsf) \
- vpx_codec_enc_init_multi_ver(ctx, iface, cfg, num_enc, flags, dsf, \
+#define vpx_codec_enc_init_multi(ctx, iface, cfg, s_lvl, num_enc, flags, dsf) \
+ vpx_codec_enc_init_multi_ver(ctx, iface, cfg, s_lvl, num_enc, flags, dsf, \
VPX_ENCODER_ABI_VERSION)