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android 硬件解码学习
FileInputStream in = new FileInputStream("/sdcard/sample.ts");String mimeType = "video/avc";MediaCodec decoder = MediaCodec.createDecoderByType(mimeType);MediaFormat format = MediaFormat.createVideoFormat(mimeType, 1920, 1080);byte[] header_sps = { 0, 0, 0, 1, 103, 100, 0, 40, -84, 52, -59, 1, -32, 17, 31, 120, 11, 80, 16, 16, 31, 0, 0, 3, 3, -23, 0, 0, -22, 96, -108 };byte[] header_pps = { 0, 0, 0, 1, 104, -18, 60, -128 };format.setByteBuffer("csd-0", ByteBuffer.wrap(header_sps));format.setByteBuffer("csd-1", ByteBuffer.wrap(header_pps));format.setInteger(MediaFormat.KEY_MAX_INPUT_SIZE, 1920 * 1080);format.setInteger("durationUs", 63446722);decoder.configure(format, surface, null, 0);decoder.start();ByteBuffer[] inputBuffers = decoder.getInputBuffers();ByteBuffer[] outputBuffers = decoder.getOutputBuffers();BufferInfo info = new BufferInfo();boolean isEOS = false;long startMs = System.currentTimeMillis();while (!Thread.interrupted()) { if (!isEOS) { int inIndex = decoder.dequeueInputBuffer(1000); if (inIndex >= 0) { byte buffer2[] = new byte[18800 * 8 * 8 * 8]; ByteBuffer buffer = inputBuffers[inIndex]; int sampleSize; sampleSize = in.read(buffer2, 0, 18800 * 4); buffer.clear(); buffer.put(buffer2, 0, sampleSize); buffer.clear(); if (sampleSize < 0) { decoder.queueInputBuffer(inIndex, 0, 0, 0, MediaCodec.BUFFER_FLAG_END_OF_STREAM); isEOS = true; } else { decoder.queueInputBuffer(inIndex, 0, sampleSize, 0, 0); } } } int outIndex = decoder.dequeueOutputBuffer(info, 10000); switch (outIndex) { case MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED: Log.d("DecodeActivity", "INFO_OUTPUT_BUFFERS_CHANGED"); outputBuffers = decoder.getOutputBuffers(); break; case MediaCodec.INFO_OUTPUT_FORMAT_CHANGED: Log.d("DecodeActivity", "New format " + decoder.getOutputFormat()); break; case MediaCodec.INFO_TRY_AGAIN_LATER: Log.d("DecodeActivity", "dequeueOutputBuffer timed out! " + info); break; default: ByteBuffer buffer = outputBuffers[outIndex]; Log.v("DecodeActivity", "We can‘t use this buffer but render it due to the API limit, " + buffer); while (info.presentationTimeUs / 1000 > System.currentTimeMillis() - startMs) { try { sleep(10); } catch (InterruptedException e) { e.printStackTrace(); break; } } decoder.releaseOutputBuffer(outIndex, true); break; } if ((info.flags & MediaCodec.BUFFER_FLAG_END_OF_STREAM) != 0) { Log.d("DecodeActivity", "OutputBuffer BUFFER_FLAG_END_OF_STREAM"); break; }}decoder.stop();decoder.release();
android 硬件解码学习
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