* be found in the AUTHORS file in the root of the source tree.
*/
-
// Simple Decoder
// ==============
//
// -----------------
// For decoders, you only have to include `vpx_decoder.h` and then any
// header files for the specific codecs you use. In this case, we're using
-// vp8. The `VPX_CODEC_DISABLE_COMPAT` macro can be defined to ensure
-// strict compliance with the latest SDK by disabling some backwards
-// compatibility features. Defining this macro is encouraged.
+// vp8.
//
// Initializing The Codec
// ----------------------
-// The decoder is initialized by the following code. This is an example for
-// the VP8 decoder, but the code is analogous for all algorithms. Replace
-// `vpx_codec_vp8_dx()` with a pointer to the interface exposed by the
-// algorithm you want to use. The `cfg` argument is left as NULL in this
-// example, because we want the algorithm to determine the stream
-// configuration (width/height) and allocate memory automatically. This
-// parameter is generally only used if you need to preallocate memory,
-// particularly in External Memory Allocation mode.
+// The libvpx decoder is initialized by the call to vpx_codec_dec_init().
+// Determining the codec interface to use is handled by VpxVideoReader and the
+// functions prefixed with vpx_video_reader_. Discussion of those functions is
+// beyond the scope of this example, but the main gist is to open the input file
+// and parse just enough of it to determine if it's a VPx file and which VPx
+// codec is contained within the file.
+// Note the NULL pointer passed to vpx_codec_dec_init(). We do that in this
+// example because we want the algorithm to determine the stream configuration
+// (width/height) and allocate memory automatically.
//
// Decoding A Frame
// ----------------
// Once the frame has been read into memory, it is decoded using the
// `vpx_codec_decode` function. The call takes a pointer to the data
-// (`frame`) and the length of the data (`frame_sz`). No application data
+// (`frame`) and the length of the data (`frame_size`). No application data
// is associated with the frame in this example, so the `user_priv`
// parameter is NULL. The `deadline` parameter is left at zero for this
-// example. This parameter is generally only used when doing adaptive
-// postprocessing.
+// example. This parameter is generally only used when doing adaptive post
+// processing.
//
// Codecs may produce a variable number of output frames for every call to
// `vpx_codec_decode`. These frames are retrieved by the
// --------------
// This example does not special case any error return codes. If there was
// an error, a descriptive message is printed and the program exits. With
-// few exeptions, vpx_codec functions return an enumerated error status,
+// few exceptions, vpx_codec functions return an enumerated error status,
// with the value `0` indicating success.
-#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#define VPX_CODEC_DISABLE_COMPAT 1
-#include "./vpx_config.h"
-#include "vpx/vp8dx.h"
+
#include "vpx/vpx_decoder.h"
-#define interface (vpx_codec_vp8_dx())
+#include "../tools_common.h"
+#include "../video_reader.h"
+#include "./vpx_config.h"
-#define IVF_FILE_HDR_SZ (32)
-#define IVF_FRAME_HDR_SZ (12)
+static const char *exec_name;
-static unsigned int mem_get_le32(const unsigned char *mem) {
- return (mem[3] << 24)|(mem[2] << 16)|(mem[1] << 8)|(mem[0]);
+void usage_exit(void) {
+ fprintf(stderr, "Usage: %s <infile> <outfile>\n", exec_name);
+ exit(EXIT_FAILURE);
}
-static void die(const char *fmt, ...) {
- va_list ap;
+int main(int argc, char **argv) {
+ int frame_cnt = 0;
+ FILE *outfile = NULL;
+ vpx_codec_ctx_t codec;
+ VpxVideoReader *reader = NULL;
+ const VpxInterface *decoder = NULL;
+ const VpxVideoInfo *info = NULL;
- va_start(ap, fmt);
- vprintf(fmt, ap);
- if(fmt[strlen(fmt)-1] != '\n')
- printf("\n");
- exit(EXIT_FAILURE);
-}
+ exec_name = argv[0];
-static void die_codec(vpx_codec_ctx_t *ctx, const char *s) {
- const char *detail = vpx_codec_error_detail(ctx);
+ if (argc != 3) die("Invalid number of arguments.");
- printf("%s: %s\n", s, vpx_codec_error(ctx));
- if(detail)
- printf(" %s\n",detail);
- exit(EXIT_FAILURE);
-}
+ reader = vpx_video_reader_open(argv[1]);
+ if (!reader) die("Failed to open %s for reading.", argv[1]);
+ if (!(outfile = fopen(argv[2], "wb")))
+ die("Failed to open %s for writing.", argv[2]);
-int main(int argc, char **argv) {
- FILE *infile, *outfile;
- vpx_codec_ctx_t codec;
- int flags = 0, frame_cnt = 0;
- unsigned char file_hdr[IVF_FILE_HDR_SZ];
- unsigned char frame_hdr[IVF_FRAME_HDR_SZ];
- unsigned char frame[256*1024];
- vpx_codec_err_t res;
-
- (void)res;
- /* Open files */
- if(argc!=3)
- die("Usage: %s <infile> <outfile>\n", argv[0]);
- if(!(infile = fopen(argv[1], "rb")))
- die("Failed to open %s for reading", argv[1]);
- if(!(outfile = fopen(argv[2], "wb")))
- die("Failed to open %s for writing", argv[2]);
-
- /* Read file header */
- if(!(fread(file_hdr, 1, IVF_FILE_HDR_SZ, infile) == IVF_FILE_HDR_SZ
- && file_hdr[0]=='D' && file_hdr[1]=='K' && file_hdr[2]=='I'
- && file_hdr[3]=='F'))
- die("%s is not an IVF file.", argv[1]);
-
- printf("Using %s\n",vpx_codec_iface_name(interface));
- /* Initialize codec */
- if(vpx_codec_dec_init(&codec, interface, NULL, flags))
- die_codec(&codec, "Failed to initialize decoder");
-
- /* Read each frame */
- while(fread(frame_hdr, 1, IVF_FRAME_HDR_SZ, infile) == IVF_FRAME_HDR_SZ) {
- int frame_sz = mem_get_le32(frame_hdr);
- vpx_codec_iter_t iter = NULL;
- vpx_image_t *img;
-
-
- frame_cnt++;
- if(frame_sz > sizeof(frame))
- die("Frame %d data too big for example code buffer", frame_sz);
- if(fread(frame, 1, frame_sz, infile) != frame_sz)
- die("Frame %d failed to read complete frame", frame_cnt);
-
- /* Decode the frame */
- if(vpx_codec_decode(&codec, frame, frame_sz, NULL, 0))
- die_codec(&codec, "Failed to decode frame");
-
- /* Write decoded data to disk */
- while((img = vpx_codec_get_frame(&codec, &iter))) {
- unsigned int plane, y;
-
- for(plane=0; plane < 3; plane++) {
- unsigned char *buf =img->planes[plane];
-
- for(y=0; y < (plane ? (img->d_h + 1) >> 1 : img->d_h); y++) {
- (void) fwrite(buf, 1, (plane ? (img->d_w + 1) >> 1 : img->d_w),
- outfile);
- buf += img->stride[plane];
- }
- }
- }
+ info = vpx_video_reader_get_info(reader);
+
+ decoder = get_vpx_decoder_by_fourcc(info->codec_fourcc);
+ if (!decoder) die("Unknown input codec.");
+
+ printf("Using %s\n", vpx_codec_iface_name(decoder->codec_interface()));
+
+ if (vpx_codec_dec_init(&codec, decoder->codec_interface(), NULL, 0))
+ die_codec(&codec, "Failed to initialize decoder.");
+
+ while (vpx_video_reader_read_frame(reader)) {
+ vpx_codec_iter_t iter = NULL;
+ vpx_image_t *img = NULL;
+ size_t frame_size = 0;
+ const unsigned char *frame =
+ vpx_video_reader_get_frame(reader, &frame_size);
+ if (vpx_codec_decode(&codec, frame, (unsigned int)frame_size, NULL, 0))
+ die_codec(&codec, "Failed to decode frame.");
+
+ while ((img = vpx_codec_get_frame(&codec, &iter)) != NULL) {
+ vpx_img_write(img, outfile);
+ ++frame_cnt;
}
- printf("Processed %d frames.\n",frame_cnt);
- if(vpx_codec_destroy(&codec))
- die_codec(&codec, "Failed to destroy codec");
+ }
+
+ printf("Processed %d frames.\n", frame_cnt);
+ if (vpx_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec");
+
+ printf("Play: ffplay -f rawvideo -pix_fmt yuv420p -s %dx%d %s\n",
+ info->frame_width, info->frame_height, argv[2]);
+
+ vpx_video_reader_close(reader);
+
+ fclose(outfile);
- fclose(outfile);
- fclose(infile);
- return EXIT_SUCCESS;
+ return EXIT_SUCCESS;
}
projects / libvpx / blobdiff