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Diffstat (limited to '')
-rw-r--r-- | third_party/aom/common/webmdec.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/third_party/aom/common/webmdec.h b/third_party/aom/common/webmdec.h new file mode 100644 index 0000000000..fcbdeffe4d --- /dev/null +++ b/third_party/aom/common/webmdec.h @@ -0,0 +1,71 @@ +/* + * Copyright (c) 2016, Alliance for Open Media. All rights reserved + * + * This source code is subject to the terms of the BSD 2 Clause License and + * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License + * was not distributed with this source code in the LICENSE file, you can + * obtain it at www.aomedia.org/license/software. If the Alliance for Open + * Media Patent License 1.0 was not distributed with this source code in the + * PATENTS file, you can obtain it at www.aomedia.org/license/patent. + */ +#ifndef AOM_COMMON_WEBMDEC_H_ +#define AOM_COMMON_WEBMDEC_H_ + +#include "common/tools_common.h" + +#ifdef __cplusplus +extern "C" { +#endif + +struct AvxInputContext; + +struct WebmInputContext { + void *reader; + void *segment; + uint8_t *buffer; + const void *cluster; + const void *block_entry; + const void *block; + int block_frame_index; + int video_track_index; + int64_t timestamp_ns; + int is_key_frame; + int reached_eos; +}; + +// Checks if the input is a WebM file. If so, initializes WebMInputContext so +// that webm_read_frame can be called to retrieve a video frame. +// Returns 1 on success and 0 on failure or input is not WebM file. +// TODO(vigneshv): Refactor this function into two smaller functions specific +// to their task. +int file_is_webm(struct WebmInputContext *webm_ctx, + struct AvxInputContext *aom_ctx); + +// Reads a WebM Video Frame. Memory for the buffer is created, owned and managed +// by this function. For the first call, |buffer| should be NULL and +// |*buffer_size| should be 0. Once all the frames are read and used, +// webm_free() should be called, otherwise there will be a leak. +// Parameters: +// webm_ctx - WebmInputContext object +// buffer - pointer where the frame data will be filled. +// bytes_read - pointer to bytes read. +// buffer_size - pointer to buffer size. +// Return values: +// 0 - Success +// 1 - End of Stream +// -1 - Error +int webm_read_frame(struct WebmInputContext *webm_ctx, uint8_t **buffer, + size_t *bytes_read, size_t *buffer_size); + +// Guesses the frame rate of the input file based on the container timestamps. +int webm_guess_framerate(struct WebmInputContext *webm_ctx, + struct AvxInputContext *aom_ctx); + +// Resets the WebMInputContext. +void webm_free(struct WebmInputContext *webm_ctx); + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif // AOM_COMMON_WEBMDEC_H_ |