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Diffstat (limited to 'example_xma.c')
| -rw-r--r-- | example_xma.c | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/example_xma.c b/example_xma.c new file mode 100644 index 000000000..cc4e59196 --- /dev/null +++ b/example_xma.c @@ -0,0 +1,213 @@ +/* + * Copyright (c) 2010 The VP8 project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license and patent + * grant that can be found in the LICENSE file in the root of the source + * tree. All contributing project authors may be found in the AUTHORS + * file in the root of the source tree. + */ + + +/* This is a simple program showing how to initialize the decoder in XMA mode */ +#include <stdio.h> +#include <stdlib.h> +#include <stdarg.h> +#include <string.h> +#define VPX_CODEC_DISABLE_COMPAT 1 +#include "vpx_config.h" +#include "vpx_decoder.h" +#include "vpx_integer.h" +#if CONFIG_VP8_DECODER +#include "vp8dx.h" +#endif + +static char *exec_name; +static int verbose = 0; + +static const struct +{ + const char *name; + const vpx_codec_iface_t *iface; +} ifaces[] = +{ +#if CONFIG_VP8_DECODER + {"vp8", &vpx_codec_vp8_dx_algo}, +#endif +}; + +static void usage_exit(void) +{ + int i; + + printf("Usage: %s <options>\n\n" + "Options:\n" + "\t--codec <name>\tCodec to use (default=%s)\n" + "\t-h <height>\tHeight of the simulated video frame, in pixels\n" + "\t-w <width> \tWidth of the simulated video frame, in pixels\n" + "\t-v \tVerbose mode (show individual segment sizes)\n" + "\t--help \tShow this message\n" + "\n" + "Included decoders:\n" + "\n", + exec_name, + ifaces[0].name); + + for (i = 0; i < sizeof(ifaces) / sizeof(ifaces[0]); i++) + printf(" %-6s - %s\n", + ifaces[i].name, + vpx_codec_iface_name(ifaces[i].iface)); + + exit(EXIT_FAILURE); +} + +static void usage_error(const char *fmt, ...) +{ + va_list ap; + va_start(ap, fmt); + vprintf(fmt, ap); + printf("\n"); + usage_exit(); +} + +void my_mem_dtor(vpx_codec_mmap_t *mmap) +{ + if (verbose) + printf("freeing segment %d\n", mmap->id); + + free(mmap->priv); +} + +int main(int argc, char **argv) +{ + vpx_codec_ctx_t decoder; + vpx_codec_iface_t *iface = ifaces[0].iface; + vpx_codec_iter_t iter; + vpx_codec_dec_cfg_t cfg; + vpx_codec_err_t res = VPX_CODEC_OK; + unsigned int alloc_sz = 0; + unsigned int w = 352; + unsigned int h = 288; + int i; + + exec_name = argv[0]; + + for (i = 1; i < argc; i++) + { + if (!strcmp(argv[i], "--codec")) + { + if (i + 1 < argc) + { + int j, k = -1; + + i++; + + for (j = 0; j < sizeof(ifaces) / sizeof(ifaces[0]); j++) + if (!strcmp(ifaces[j].name, argv[i])) + k = j; + + if (k >= 0) + iface = ifaces[k].iface; + else + usage_error("Error: Unrecognized argument (%s) to --codec\n", + argv[i]); + } + else + usage_error("Error: Option --codec requires argument.\n"); + } + else if (!strcmp(argv[i], "-v")) + verbose = 1; + else if (!strcmp(argv[i], "-h")) + if (i + 1 < argc) + { + h = atoi(argv[++i]); + } + else + usage_error("Error: Option -h requires argument.\n"); + else if (!strcmp(argv[i], "-w")) + if (i + 1 < argc) + { + w = atoi(argv[++i]); + } + else + usage_error("Error: Option -w requires argument.\n"); + else if (!strcmp(argv[i], "--help")) + usage_exit(); + else + usage_error("Error: Unrecognized option %s\n\n", argv[i]); + } + + if (argc == 1) + printf("Using built-in defaults. For options, rerun with --help\n\n"); + + /* XMA mode is not supported on all decoders! */ + if (!(vpx_codec_get_caps(iface) & VPX_CODEC_CAP_XMA)) + { + printf("%s does not support XMA mode!\n", vpx_codec_iface_name(iface)); + return EXIT_FAILURE; + } + + /* The codec knows how much memory to allocate based on the size of the + * encoded frames. This data can be parsed from the bitstream with + * vpx_codec_peek_stream_info() if a bitstream is available. Otherwise, + * a fixed size can be used that will be the upper limit on the frame + * size the decoder can decode. + */ + cfg.w = w; + cfg.h = h; + + /* Initialize the decoder in XMA mode. */ + if (vpx_codec_dec_init(&decoder, iface, &cfg, VPX_CODEC_USE_XMA)) + { + printf("Failed to initialize decoder in XMA mode: %s\n", vpx_codec_error(&decoder)); + return EXIT_FAILURE; + } + + /* Iterate through the list of memory maps, allocating them with the + * requested alignment. + */ + iter = NULL; + + do + { + vpx_codec_mmap_t mmap; + unsigned int align; + + res = vpx_codec_get_mem_map(&decoder, &mmap, &iter); + align = mmap.align ? mmap.align - 1 : 0; + + if (!res) + { + if (verbose) + printf("Allocating segment %u, size %lu, align %u %s\n", + mmap.id, mmap.sz, mmap.align, + mmap.flags & VPX_CODEC_MEM_ZERO ? "(ZEROED)" : ""); + + if (mmap.flags & VPX_CODEC_MEM_ZERO) + mmap.priv = calloc(1, mmap.sz + align); + else + mmap.priv = malloc(mmap.sz + align); + + mmap.base = (void *)((((uintptr_t)mmap.priv) + align) & ~(uintptr_t)align); + mmap.dtor = my_mem_dtor; + alloc_sz += mmap.sz + align; + + if (vpx_codec_set_mem_map(&decoder, &mmap, 1)) + { + printf("Failed to set mmap: %s\n", vpx_codec_error(&decoder)); + return EXIT_FAILURE; + } + } + else if (res != VPX_CODEC_LIST_END) + { + printf("Failed to get mmap: %s\n", vpx_codec_error(&decoder)); + return EXIT_FAILURE; + } + } + while (res != VPX_CODEC_LIST_END); + + printf("%s\n %d bytes external memory required for %dx%d.\n", + decoder.name, alloc_sz, cfg.w, cfg.h); + vpx_codec_destroy(&decoder); + return EXIT_SUCCESS; + +} |