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m4vdec: Check for non-startcode 00 00 00 sequences in probe
This makes the m4v detection less trigger-happy. Bug-Id: 949 Signed-off-by: Diego Biurrun <diego@biurrun.de>
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@ -33,16 +33,18 @@ static int mpeg4video_probe(AVProbeData *probe_packet)
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for (i = 0; i < probe_packet->buf_size; i++) {
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temp_buffer = (temp_buffer << 8) + probe_packet->buf[i];
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if ((temp_buffer & 0xffffff00) != 0x100)
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if (temp_buffer & 0xfffffe00)
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continue;
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if (temp_buffer < 2)
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continue;
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if (temp_buffer == VOP_START_CODE)
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VOP++;
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else if (temp_buffer == VISUAL_OBJECT_START_CODE)
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VISO++;
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else if (temp_buffer < 0x120)
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else if (temp_buffer >= 0x100 && temp_buffer < 0x120)
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VO++;
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else if (temp_buffer < 0x130)
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else if (temp_buffer >= 0x120 && temp_buffer < 0x130)
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VOL++;
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else if (!(0x1AF < temp_buffer && temp_buffer < 0x1B7) &&
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!(0x1B9 < temp_buffer && temp_buffer < 0x1C4))
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