1f05b19e69
webm_read_frame assumes that it won't be called once end of file is reached. But for frame parallel mode that turns out to be not true. this patch fixes that behavior by checking for EOS and returning the appropriate value for subsequent calls. Change-Id: Ie2fddbe00493a0f96c4172c67be1eb719f0fe8ed
75 lines
2.4 KiB
C
75 lines
2.4 KiB
C
/*
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* Copyright (c) 2013 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef WEBMDEC_H_
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#define WEBMDEC_H_
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#include "./tools_common.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct VpxInputContext;
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struct WebmInputContext {
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void *reader;
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void *segment;
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uint8_t *buffer;
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const void *cluster;
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const void *block_entry;
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const void *block;
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int block_frame_index;
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int video_track_index;
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uint64_t timestamp_ns;
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int is_key_frame;
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int reached_eos;
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};
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// Checks if the input is a WebM file. If so, initializes WebMInputContext so
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// that webm_read_frame can be called to retrieve a video frame.
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// Returns 1 on success and 0 on failure or input is not WebM file.
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// TODO(vigneshv): Refactor this function into two smaller functions specific
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// to their task.
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int file_is_webm(struct WebmInputContext *webm_ctx,
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struct VpxInputContext *vpx_ctx);
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// Reads a WebM Video Frame. Memory for the buffer is created, owned and managed
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// by this function. For the first call, |buffer| should be NULL and
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// |*bytes_in_buffer| should be 0. Once all the frames are read and used,
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// webm_free() should be called, otherwise there will be a leak.
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// Parameters:
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// webm_ctx - WebmInputContext object
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// buffer - pointer where the frame data will be filled.
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// bytes_in_buffer - pointer to buffer size.
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// buffer_size - unused TODO(vigneshv): remove this
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// Return values:
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// 0 - Success
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// 1 - End of Stream
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// -1 - Error
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// TODO(vigneshv): Make the return values consistent across all functions in
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// this file.
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int webm_read_frame(struct WebmInputContext *webm_ctx,
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uint8_t **buffer,
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size_t *bytes_in_buffer,
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size_t *buffer_size);
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// Guesses the frame rate of the input file based on the container timestamps.
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int webm_guess_framerate(struct WebmInputContext *webm_ctx,
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struct VpxInputContext *vpx_ctx);
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// Resets the WebMInputContext.
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void webm_free(struct WebmInputContext *webm_ctx);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // WEBMDEC_H_
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